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