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TOMOYO Linux Cross Reference
Linux/tools/perf/tests/builtin-test.c

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  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 <sys/types.h>
 12 #include <dirent.h>
 13 #include <sys/wait.h>
 14 #include <sys/stat.h>
 15 #include "builtin.h"
 16 #include "hist.h"
 17 #include "intlist.h"
 18 #include "tests.h"
 19 #include "debug.h"
 20 #include "color.h"
 21 #include <subcmd/parse-options.h>
 22 #include "string2.h"
 23 #include "symbol.h"
 24 #include <linux/kernel.h>
 25 #include <subcmd/exec-cmd.h>
 26 
 27 static bool dont_fork;
 28 
 29 struct test __weak arch_tests[] = {
 30         {
 31                 .func = NULL,
 32         },
 33 };
 34 
 35 static struct test generic_tests[] = {
 36         {
 37                 .desc = "vmlinux symtab matches kallsyms",
 38                 .func = test__vmlinux_matches_kallsyms,
 39         },
 40         {
 41                 .desc = "Detect openat syscall event",
 42                 .func = test__openat_syscall_event,
 43         },
 44         {
 45                 .desc = "Detect openat syscall event on all cpus",
 46                 .func = test__openat_syscall_event_on_all_cpus,
 47         },
 48         {
 49                 .desc = "Read samples using the mmap interface",
 50                 .func = test__basic_mmap,
 51         },
 52         {
 53                 .desc = "Test data source output",
 54                 .func = test__mem,
 55         },
 56         {
 57                 .desc = "Parse event definition strings",
 58                 .func = test__parse_events,
 59         },
 60         {
 61                 .desc = "Simple expression parser",
 62                 .func = test__expr,
 63         },
 64         {
 65                 .desc = "PERF_RECORD_* events & perf_sample fields",
 66                 .func = test__PERF_RECORD,
 67         },
 68         {
 69                 .desc = "Parse perf pmu format",
 70                 .func = test__pmu,
 71         },
 72         {
 73                 .desc = "DSO data read",
 74                 .func = test__dso_data,
 75         },
 76         {
 77                 .desc = "DSO data cache",
 78                 .func = test__dso_data_cache,
 79         },
 80         {
 81                 .desc = "DSO data reopen",
 82                 .func = test__dso_data_reopen,
 83         },
 84         {
 85                 .desc = "Roundtrip evsel->name",
 86                 .func = test__perf_evsel__roundtrip_name_test,
 87         },
 88         {
 89                 .desc = "Parse sched tracepoints fields",
 90                 .func = test__perf_evsel__tp_sched_test,
 91         },
 92         {
 93                 .desc = "syscalls:sys_enter_openat event fields",
 94                 .func = test__syscall_openat_tp_fields,
 95         },
 96         {
 97                 .desc = "Setup struct perf_event_attr",
 98                 .func = test__attr,
 99         },
100         {
101                 .desc = "Match and link multiple hists",
102                 .func = test__hists_link,
103         },
104         {
105                 .desc = "'import perf' in python",
106                 .func = test__python_use,
107         },
108         {
109                 .desc = "Breakpoint overflow signal handler",
110                 .func = test__bp_signal,
111                 .is_supported = test__bp_signal_is_supported,
112         },
113         {
114                 .desc = "Breakpoint overflow sampling",
115                 .func = test__bp_signal_overflow,
116                 .is_supported = test__bp_signal_is_supported,
117         },
118         {
119                 .desc = "Breakpoint accounting",
120                 .func = test__bp_accounting,
121                 .is_supported = test__bp_signal_is_supported,
122         },
123         {
124                 .desc = "Watchpoint",
125                 .func = test__wp,
126                 .is_supported = test__wp_is_supported,
127                 .subtest = {
128                         .skip_if_fail   = false,
129                         .get_nr         = test__wp_subtest_get_nr,
130                         .get_desc       = test__wp_subtest_get_desc,
131                 },
132         },
133         {
134                 .desc = "Number of exit events of a simple workload",
135                 .func = test__task_exit,
136         },
137         {
138                 .desc = "Software clock events period values",
139                 .func = test__sw_clock_freq,
140         },
141         {
142                 .desc = "Object code reading",
143                 .func = test__code_reading,
144         },
145         {
146                 .desc = "Sample parsing",
147                 .func = test__sample_parsing,
148         },
149         {
150                 .desc = "Use a dummy software event to keep tracking",
151                 .func = test__keep_tracking,
152         },
153         {
154                 .desc = "Parse with no sample_id_all bit set",
155                 .func = test__parse_no_sample_id_all,
156         },
157         {
158                 .desc = "Filter hist entries",
159                 .func = test__hists_filter,
160         },
161         {
162                 .desc = "Lookup mmap thread",
163                 .func = test__mmap_thread_lookup,
164         },
165         {
166                 .desc = "Share thread mg",
167                 .func = test__thread_mg_share,
168         },
169         {
170                 .desc = "Sort output of hist entries",
171                 .func = test__hists_output,
172         },
173         {
174                 .desc = "Cumulate child hist entries",
175                 .func = test__hists_cumulate,
176         },
177         {
178                 .desc = "Track with sched_switch",
179                 .func = test__switch_tracking,
180         },
181         {
182                 .desc = "Filter fds with revents mask in a fdarray",
183                 .func = test__fdarray__filter,
184         },
185         {
186                 .desc = "Add fd to a fdarray, making it autogrow",
187                 .func = test__fdarray__add,
188         },
189         {
190                 .desc = "kmod_path__parse",
191                 .func = test__kmod_path__parse,
192         },
193         {
194                 .desc = "Thread map",
195                 .func = test__thread_map,
196         },
197         {
198                 .desc = "LLVM search and compile",
199                 .func = test__llvm,
200                 .subtest = {
201                         .skip_if_fail   = true,
202                         .get_nr         = test__llvm_subtest_get_nr,
203                         .get_desc       = test__llvm_subtest_get_desc,
204                 },
205         },
206         {
207                 .desc = "Session topology",
208                 .func = test__session_topology,
209         },
210         {
211                 .desc = "BPF filter",
212                 .func = test__bpf,
213                 .subtest = {
214                         .skip_if_fail   = true,
215                         .get_nr         = test__bpf_subtest_get_nr,
216                         .get_desc       = test__bpf_subtest_get_desc,
217                 },
218         },
219         {
220                 .desc = "Synthesize thread map",
221                 .func = test__thread_map_synthesize,
222         },
223         {
224                 .desc = "Remove thread map",
225                 .func = test__thread_map_remove,
226         },
227         {
228                 .desc = "Synthesize cpu map",
229                 .func = test__cpu_map_synthesize,
230         },
231         {
232                 .desc = "Synthesize stat config",
233                 .func = test__synthesize_stat_config,
234         },
235         {
236                 .desc = "Synthesize stat",
237                 .func = test__synthesize_stat,
238         },
239         {
240                 .desc = "Synthesize stat round",
241                 .func = test__synthesize_stat_round,
242         },
243         {
244                 .desc = "Synthesize attr update",
245                 .func = test__event_update,
246         },
247         {
248                 .desc = "Event times",
249                 .func = test__event_times,
250         },
251         {
252                 .desc = "Read backward ring buffer",
253                 .func = test__backward_ring_buffer,
254         },
255         {
256                 .desc = "Print cpu map",
257                 .func = test__cpu_map_print,
258         },
259         {
260                 .desc = "Probe SDT events",
261                 .func = test__sdt_event,
262         },
263         {
264                 .desc = "is_printable_array",
265                 .func = test__is_printable_array,
266         },
267         {
268                 .desc = "Print bitmap",
269                 .func = test__bitmap_print,
270         },
271         {
272                 .desc = "perf hooks",
273                 .func = test__perf_hooks,
274         },
275         {
276                 .desc = "builtin clang support",
277                 .func = test__clang,
278                 .subtest = {
279                         .skip_if_fail   = true,
280                         .get_nr         = test__clang_subtest_get_nr,
281                         .get_desc       = test__clang_subtest_get_desc,
282                 }
283         },
284         {
285                 .desc = "unit_number__scnprintf",
286                 .func = test__unit_number__scnprint,
287         },
288         {
289                 .desc = "mem2node",
290                 .func = test__mem2node,
291         },
292         {
293                 .func = NULL,
294         },
295 };
296 
297 static struct test *tests[] = {
298         generic_tests,
299         arch_tests,
300 };
301 
302 static bool perf_test__matches(struct test *test, int curr, int argc, const char *argv[])
303 {
304         int i;
305 
306         if (argc == 0)
307                 return true;
308 
309         for (i = 0; i < argc; ++i) {
310                 char *end;
311                 long nr = strtoul(argv[i], &end, 10);
312 
313                 if (*end == '\0') {
314                         if (nr == curr + 1)
315                                 return true;
316                         continue;
317                 }
318 
319                 if (strcasestr(test->desc, argv[i]))
320                         return true;
321         }
322 
323         return false;
324 }
325 
326 static int run_test(struct test *test, int subtest)
327 {
328         int status, err = -1, child = dont_fork ? 0 : fork();
329         char sbuf[STRERR_BUFSIZE];
330 
331         if (child < 0) {
332                 pr_err("failed to fork test: %s\n",
333                         str_error_r(errno, sbuf, sizeof(sbuf)));
334                 return -1;
335         }
336 
337         if (!child) {
338                 if (!dont_fork) {
339                         pr_debug("test child forked, pid %d\n", getpid());
340 
341                         if (verbose <= 0) {
342                                 int nullfd = open("/dev/null", O_WRONLY);
343 
344                                 if (nullfd >= 0) {
345                                         close(STDERR_FILENO);
346                                         close(STDOUT_FILENO);
347 
348                                         dup2(nullfd, STDOUT_FILENO);
349                                         dup2(STDOUT_FILENO, STDERR_FILENO);
350                                         close(nullfd);
351                                 }
352                         } else {
353                                 signal(SIGSEGV, sighandler_dump_stack);
354                                 signal(SIGFPE, sighandler_dump_stack);
355                         }
356                 }
357 
358                 err = test->func(test, subtest);
359                 if (!dont_fork)
360                         exit(err);
361         }
362 
363         if (!dont_fork) {
364                 wait(&status);
365 
366                 if (WIFEXITED(status)) {
367                         err = (signed char)WEXITSTATUS(status);
368                         pr_debug("test child finished with %d\n", err);
369                 } else if (WIFSIGNALED(status)) {
370                         err = -1;
371                         pr_debug("test child interrupted\n");
372                 }
373         }
374 
375         return err;
376 }
377 
378 #define for_each_test(j, t)                                     \
379         for (j = 0; j < ARRAY_SIZE(tests); j++) \
380                 for (t = &tests[j][0]; t->func; t++)
381 
382 static int test_and_print(struct test *t, bool force_skip, int subtest)
383 {
384         int err;
385 
386         if (!force_skip) {
387                 pr_debug("\n--- start ---\n");
388                 err = run_test(t, subtest);
389                 pr_debug("---- end ----\n");
390         } else {
391                 pr_debug("\n--- force skipped ---\n");
392                 err = TEST_SKIP;
393         }
394 
395         if (!t->subtest.get_nr)
396                 pr_debug("%s:", t->desc);
397         else
398                 pr_debug("%s subtest %d:", t->desc, subtest + 1);
399 
400         switch (err) {
401         case TEST_OK:
402                 pr_info(" Ok\n");
403                 break;
404         case TEST_SKIP:
405                 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
406                 break;
407         case TEST_FAIL:
408         default:
409                 color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
410                 break;
411         }
412 
413         return err;
414 }
415 
416 static const char *shell_test__description(char *description, size_t size,
417                                            const char *path, const char *name)
418 {
419         FILE *fp;
420         char filename[PATH_MAX];
421 
422         path__join(filename, sizeof(filename), path, name);
423         fp = fopen(filename, "r");
424         if (!fp)
425                 return NULL;
426 
427         /* Skip shebang */
428         while (fgetc(fp) != '\n');
429 
430         description = fgets(description, size, fp);
431         fclose(fp);
432 
433         return description ? trim(description + 1) : NULL;
434 }
435 
436 #define for_each_shell_test(dir, base, ent)     \
437         while ((ent = readdir(dir)) != NULL)    \
438                 if (!is_directory(base, ent) && ent->d_name[0] != '.')
439 
440 static const char *shell_tests__dir(char *path, size_t size)
441 {
442         const char *devel_dirs[] = { "./tools/perf/tests", "./tests", };
443         char *exec_path;
444         unsigned int i;
445 
446         for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) {
447                 struct stat st;
448                 if (!lstat(devel_dirs[i], &st)) {
449                         scnprintf(path, size, "%s/shell", devel_dirs[i]);
450                         if (!lstat(devel_dirs[i], &st))
451                                 return path;
452                 }
453         }
454 
455         /* Then installed path. */
456         exec_path = get_argv_exec_path();
457         scnprintf(path, size, "%s/tests/shell", exec_path);
458         free(exec_path);
459         return path;
460 }
461 
462 static int shell_tests__max_desc_width(void)
463 {
464         DIR *dir;
465         struct dirent *ent;
466         char path_dir[PATH_MAX];
467         const char *path = shell_tests__dir(path_dir, sizeof(path_dir));
468         int width = 0;
469 
470         if (path == NULL)
471                 return -1;
472 
473         dir = opendir(path);
474         if (!dir)
475                 return -1;
476 
477         for_each_shell_test(dir, path, ent) {
478                 char bf[256];
479                 const char *desc = shell_test__description(bf, sizeof(bf), path, ent->d_name);
480 
481                 if (desc) {
482                         int len = strlen(desc);
483 
484                         if (width < len)
485                                 width = len;
486                 }
487         }
488 
489         closedir(dir);
490         return width;
491 }
492 
493 struct shell_test {
494         const char *dir;
495         const char *file;
496 };
497 
498 static int shell_test__run(struct test *test, int subdir __maybe_unused)
499 {
500         int err;
501         char script[PATH_MAX];
502         struct shell_test *st = test->priv;
503 
504         path__join(script, sizeof(script), st->dir, st->file);
505 
506         err = system(script);
507         if (!err)
508                 return TEST_OK;
509 
510         return WEXITSTATUS(err) == 2 ? TEST_SKIP : TEST_FAIL;
511 }
512 
513 static int run_shell_tests(int argc, const char *argv[], int i, int width)
514 {
515         DIR *dir;
516         struct dirent *ent;
517         char path_dir[PATH_MAX];
518         struct shell_test st = {
519                 .dir = shell_tests__dir(path_dir, sizeof(path_dir)),
520         };
521 
522         if (st.dir == NULL)
523                 return -1;
524 
525         dir = opendir(st.dir);
526         if (!dir)
527                 return -1;
528 
529         for_each_shell_test(dir, st.dir, ent) {
530                 int curr = i++;
531                 char desc[256];
532                 struct test test = {
533                         .desc = shell_test__description(desc, sizeof(desc), st.dir, ent->d_name),
534                         .func = shell_test__run,
535                         .priv = &st,
536                 };
537 
538                 if (!perf_test__matches(&test, curr, argc, argv))
539                         continue;
540 
541                 st.file = ent->d_name;
542                 pr_info("%2d: %-*s:", i, width, test.desc);
543                 test_and_print(&test, false, -1);
544         }
545 
546         closedir(dir);
547         return 0;
548 }
549 
550 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
551 {
552         struct test *t;
553         unsigned int j;
554         int i = 0;
555         int width = shell_tests__max_desc_width();
556 
557         for_each_test(j, t) {
558                 int len = strlen(t->desc);
559 
560                 if (width < len)
561                         width = len;
562         }
563 
564         for_each_test(j, t) {
565                 int curr = i++, err;
566 
567                 if (!perf_test__matches(t, curr, argc, argv))
568                         continue;
569 
570                 if (t->is_supported && !t->is_supported()) {
571                         pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc);
572                         continue;
573                 }
574 
575                 pr_info("%2d: %-*s:", i, width, t->desc);
576 
577                 if (intlist__find(skiplist, i)) {
578                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
579                         continue;
580                 }
581 
582                 if (!t->subtest.get_nr) {
583                         test_and_print(t, false, -1);
584                 } else {
585                         int subn = t->subtest.get_nr();
586                         /*
587                          * minus 2 to align with normal testcases.
588                          * For subtest we print additional '.x' in number.
589                          * for example:
590                          *
591                          * 35: Test LLVM searching and compiling                        :
592                          * 35.1: Basic BPF llvm compiling test                          : Ok
593                          */
594                         int subw = width > 2 ? width - 2 : width;
595                         bool skip = false;
596                         int subi;
597 
598                         if (subn <= 0) {
599                                 color_fprintf(stderr, PERF_COLOR_YELLOW,
600                                               " Skip (not compiled in)\n");
601                                 continue;
602                         }
603                         pr_info("\n");
604 
605                         for (subi = 0; subi < subn; subi++) {
606                                 int len = strlen(t->subtest.get_desc(subi));
607 
608                                 if (subw < len)
609                                         subw = len;
610                         }
611 
612                         for (subi = 0; subi < subn; subi++) {
613                                 pr_info("%2d.%1d: %-*s:", i, subi + 1, subw,
614                                         t->subtest.get_desc(subi));
615                                 err = test_and_print(t, skip, subi);
616                                 if (err != TEST_OK && t->subtest.skip_if_fail)
617                                         skip = true;
618                         }
619                 }
620         }
621 
622         return run_shell_tests(argc, argv, i, width);
623 }
624 
625 static int perf_test__list_shell(int argc, const char **argv, int i)
626 {
627         DIR *dir;
628         struct dirent *ent;
629         char path_dir[PATH_MAX];
630         const char *path = shell_tests__dir(path_dir, sizeof(path_dir));
631 
632         if (path == NULL)
633                 return -1;
634 
635         dir = opendir(path);
636         if (!dir)
637                 return -1;
638 
639         for_each_shell_test(dir, path, ent) {
640                 int curr = i++;
641                 char bf[256];
642                 struct test t = {
643                         .desc = shell_test__description(bf, sizeof(bf), path, ent->d_name),
644                 };
645 
646                 if (!perf_test__matches(&t, curr, argc, argv))
647                         continue;
648 
649                 pr_info("%2d: %s\n", i, t.desc);
650         }
651 
652         closedir(dir);
653         return 0;
654 }
655 
656 static int perf_test__list(int argc, const char **argv)
657 {
658         unsigned int j;
659         struct test *t;
660         int i = 0;
661 
662         for_each_test(j, t) {
663                 int curr = i++;
664 
665                 if (!perf_test__matches(t, curr, argc, argv) ||
666                     (t->is_supported && !t->is_supported()))
667                         continue;
668 
669                 pr_info("%2d: %s\n", i, t->desc);
670 
671                 if (t->subtest.get_nr) {
672                         int subn = t->subtest.get_nr();
673                         int subi;
674 
675                         for (subi = 0; subi < subn; subi++)
676                                 pr_info("%2d:%1d: %s\n", i, subi + 1,
677                                         t->subtest.get_desc(subi));
678                 }
679         }
680 
681         perf_test__list_shell(argc, argv, i);
682 
683         return 0;
684 }
685 
686 int cmd_test(int argc, const char **argv)
687 {
688         const char *test_usage[] = {
689         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
690         NULL,
691         };
692         const char *skip = NULL;
693         const struct option test_options[] = {
694         OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
695         OPT_INCR('v', "verbose", &verbose,
696                     "be more verbose (show symbol address, etc)"),
697         OPT_BOOLEAN('F', "dont-fork", &dont_fork,
698                     "Do not fork for testcase"),
699         OPT_END()
700         };
701         const char * const test_subcommands[] = { "list", NULL };
702         struct intlist *skiplist = NULL;
703         int ret = hists__init();
704 
705         if (ret < 0)
706                 return ret;
707 
708         argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
709         if (argc >= 1 && !strcmp(argv[0], "list"))
710                 return perf_test__list(argc - 1, argv + 1);
711 
712         symbol_conf.priv_size = sizeof(int);
713         symbol_conf.sort_by_name = true;
714         symbol_conf.try_vmlinux_path = true;
715 
716         if (symbol__init(NULL) < 0)
717                 return -1;
718 
719         if (skip != NULL)
720                 skiplist = intlist__new(skip);
721 
722         return __cmd_test(argc, argv, skiplist);
723 }
724 

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