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