builtin-test.c

  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 <ctype.h>
  8#include <fcntl.h>
  9#include <errno.h>
 10#ifdef HAVE_BACKTRACE_SUPPORT
 11#include <execinfo.h>
 12#endif
 13#include <poll.h>
 14#include <unistd.h>
 15#include <setjmp.h>
 16#include <string.h>
 17#include <stdlib.h>
 18#include <sys/types.h>
 19#include <dirent.h>
 20#include <sys/wait.h>
 21#include <sys/stat.h>
 22#include "builtin.h"
 23#include "config.h"
 24#include "hist.h"
 25#include "intlist.h"
 26#include "tests.h"
 27#include "debug.h"
 28#include "color.h"
 29#include <subcmd/parse-options.h>
 30#include <subcmd/run-command.h>
 31#include "string2.h"
 32#include "symbol.h"
 33#include "util/rlimit.h"
 34#include "util/strbuf.h"
 35#include <linux/kernel.h>
 36#include <linux/string.h>
 37#include <subcmd/exec-cmd.h>
 38#include <linux/zalloc.h>
 39
 40#include "tests-scripts.h"
 41
 42/*
 43 * Command line option to not fork the test running in the same process and
 44 * making them easier to debug.
 45 */
 46static bool dont_fork;
 47/* Fork the tests in parallel and wait for their completion. */
 48static bool sequential;
 49/* Number of times each test is run. */
 50static unsigned int runs_per_test = 1;
 51const char *dso_to_test;
 52const char *test_objdump_path = "objdump";
 53
 54/*
 55 * List of architecture specific tests. Not a weak symbol as the array length is
 56 * dependent on the initialization, as such GCC with LTO complains of
 57 * conflicting definitions with a weak symbol.
 58 */
 59#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__)
 60extern struct test_suite *arch_tests[];
 61#else
 62static struct test_suite *arch_tests[] = {
 63	NULL,
 64};
 65#endif
 66
 67static struct test_suite *generic_tests[] = {
 68	&suite__vmlinux_matches_kallsyms,
 69	&suite__openat_syscall_event,
 70	&suite__openat_syscall_event_on_all_cpus,
 71	&suite__basic_mmap,
 72	&suite__mem,
 73	&suite__parse_events,
 74	&suite__expr,
 75	&suite__PERF_RECORD,
 76	&suite__pmu,
 77	&suite__pmu_events,
 78	&suite__hwmon_pmu,
 79	&suite__tool_pmu,
 80	&suite__dso_data,
 81	&suite__perf_evsel__roundtrip_name_test,
 82#ifdef HAVE_LIBTRACEEVENT
 83	&suite__perf_evsel__tp_sched_test,
 84	&suite__syscall_openat_tp_fields,
 85#endif
 86	&suite__hists_link,
 87	&suite__bp_signal,
 88	&suite__bp_signal_overflow,
 89	&suite__bp_accounting,
 90	&suite__wp,
 91	&suite__task_exit,
 92	&suite__sw_clock_freq,
 93	&suite__code_reading,
 94	&suite__sample_parsing,
 95	&suite__keep_tracking,
 96	&suite__parse_no_sample_id_all,
 97	&suite__hists_filter,
 98	&suite__mmap_thread_lookup,
 99	&suite__thread_maps_share,
100	&suite__hists_output,
101	&suite__hists_cumulate,
102#ifdef HAVE_LIBTRACEEVENT
103	&suite__switch_tracking,
104#endif
105	&suite__fdarray__filter,
106	&suite__fdarray__add,
107	&suite__kmod_path__parse,
108	&suite__thread_map,
109	&suite__session_topology,
110	&suite__thread_map_synthesize,
111	&suite__thread_map_remove,
112	&suite__cpu_map,
113	&suite__synthesize_stat_config,
114	&suite__synthesize_stat,
115	&suite__synthesize_stat_round,
116	&suite__event_update,
117	&suite__event_times,
118	&suite__backward_ring_buffer,
119	&suite__sdt_event,
120	&suite__is_printable_array,
121	&suite__bitmap_print,
122	&suite__perf_hooks,
123	&suite__unit_number__scnprint,
124	&suite__mem2node,
125	&suite__time_utils,
126	&suite__jit_write_elf,
127	&suite__pfm,
128	&suite__api_io,
129	&suite__maps,
130	&suite__demangle_java,
131	&suite__demangle_ocaml,
132	&suite__demangle_rust,
133	&suite__parse_metric,
134	&suite__pe_file_parsing,
135	&suite__expand_cgroup_events,
136	&suite__perf_time_to_tsc,
137	&suite__dlfilter,
138	&suite__sigtrap,
139	&suite__event_groups,
140	&suite__symbols,
141	&suite__util,
142	&suite__subcmd_help,
143	&suite__kallsyms_split,
144	NULL,
145};
146
147static struct test_workload *workloads[] = {
148	&workload__noploop,
149	&workload__thloop,
150	&workload__leafloop,
151	&workload__sqrtloop,
152	&workload__brstack,
153	&workload__datasym,
154	&workload__landlock,
155	&workload__traploop,
156};
157
158#define workloads__for_each(workload) \
159	for (unsigned i = 0; i < ARRAY_SIZE(workloads) && ({ workload = workloads[i]; 1; }); i++)
160
161#define test_suite__for_each_test_case(suite, idx)			\
162	for (idx = 0; (suite)->test_cases && (suite)->test_cases[idx].name != NULL; idx++)
163
164static void close_parent_fds(void)
165{
166	DIR *dir = opendir("/proc/self/fd");
167	struct dirent *ent;
168
169	while ((ent = readdir(dir))) {
170		char *end;
171		long fd;
172
173		if (ent->d_type != DT_LNK)
174			continue;
175
176		if (!isdigit(ent->d_name[0]))
177			continue;
178
179		fd = strtol(ent->d_name, &end, 10);
180		if (*end)
181			continue;
182
183		if (fd <= 3 || fd == dirfd(dir))
184			continue;
185
186		close(fd);
187	}
188	closedir(dir);
189}
190
191static void check_leaks(void)
192{
193	DIR *dir = opendir("/proc/self/fd");
194	struct dirent *ent;
195	int leaks = 0;
196
197	while ((ent = readdir(dir))) {
198		char path[PATH_MAX];
199		char *end;
200		long fd;
201		ssize_t len;
202
203		if (ent->d_type != DT_LNK)
204			continue;
205
206		if (!isdigit(ent->d_name[0]))
207			continue;
208
209		fd = strtol(ent->d_name, &end, 10);
210		if (*end)
211			continue;
212
213		if (fd <= 3 || fd == dirfd(dir))
214			continue;
215
216		leaks++;
217		len = readlinkat(dirfd(dir), ent->d_name, path, sizeof(path));
218		if (len > 0 && (size_t)len < sizeof(path))
219			path[len] = '\0';
220		else
221			strncpy(path, ent->d_name, sizeof(path));
222		pr_err("Leak of file descriptor %s that opened: '%s'\n", ent->d_name, path);
223	}
224	closedir(dir);
225	if (leaks)
226		abort();
227}
228
229static int test_suite__num_test_cases(const struct test_suite *t)
230{
231	int num;
232
233	test_suite__for_each_test_case(t, num);
234
235	return num;
236}
237
238static const char *skip_reason(const struct test_suite *t, int test_case)
239{
240	if (!t->test_cases)
241		return NULL;
242
243	return t->test_cases[test_case >= 0 ? test_case : 0].skip_reason;
244}
245
246static const char *test_description(const struct test_suite *t, int test_case)
247{
248	if (t->test_cases && test_case >= 0)
249		return t->test_cases[test_case].desc;
250
251	return t->desc;
252}
253
254static test_fnptr test_function(const struct test_suite *t, int test_case)
255{
256	if (test_case <= 0)
257		return t->test_cases[0].run_case;
258
259	return t->test_cases[test_case].run_case;
260}
261
262static bool test_exclusive(const struct test_suite *t, int test_case)
263{
264	if (test_case <= 0)
265		return t->test_cases[0].exclusive;
266
267	return t->test_cases[test_case].exclusive;
268}
269
270static bool perf_test__matches(const char *desc, int suite_num, int argc, const char *argv[])
271{
272	int i;
273
274	if (argc == 0)
275		return true;
276
277	for (i = 0; i < argc; ++i) {
278		char *end;
279		long nr = strtoul(argv[i], &end, 10);
280
281		if (*end == '\0') {
282			if (nr == suite_num + 1)
283				return true;
284			continue;
285		}
286
287		if (strcasestr(desc, argv[i]))
288			return true;
289	}
290
291	return false;
292}
293
294struct child_test {
295	struct child_process process;
296	struct test_suite *test;
297	int suite_num;
298	int test_case_num;
299};
300
301static jmp_buf run_test_jmp_buf;
302
303static void child_test_sig_handler(int sig)
304{
305#ifdef HAVE_BACKTRACE_SUPPORT
306	void *stackdump[32];
307	size_t stackdump_size;
308#endif
309
310	fprintf(stderr, "\n---- unexpected signal (%d) ----\n", sig);
311#ifdef HAVE_BACKTRACE_SUPPORT
312	stackdump_size = backtrace(stackdump, ARRAY_SIZE(stackdump));
313	__dump_stack(stderr, stackdump, stackdump_size);
314#endif
315	siglongjmp(run_test_jmp_buf, sig);
316}
317
318static int run_test_child(struct child_process *process)
319{
320	const int signals[] = {
321		SIGABRT, SIGBUS, SIGFPE, SIGILL, SIGINT, SIGPIPE, SIGQUIT, SIGSEGV, SIGTERM,
322	};
323	struct child_test *child = container_of(process, struct child_test, process);
324	int err;
325
326	close_parent_fds();
327
328	err = sigsetjmp(run_test_jmp_buf, 1);
329	if (err) {
330		/* Received signal. */
331		err = err > 0 ? -err : -1;
332		goto err_out;
333	}
334
335	for (size_t i = 0; i < ARRAY_SIZE(signals); i++)
336		signal(signals[i], child_test_sig_handler);
337
338	pr_debug("--- start ---\n");
339	pr_debug("test child forked, pid %d\n", getpid());
340	err = test_function(child->test, child->test_case_num)(child->test, child->test_case_num);
341	pr_debug("---- end(%d) ----\n", err);
342
343	check_leaks();
344err_out:
345	fflush(NULL);
346	for (size_t i = 0; i < ARRAY_SIZE(signals); i++)
347		signal(signals[i], SIG_DFL);
348	return -err;
349}
350
351#define TEST_RUNNING -3
352
353static int print_test_result(struct test_suite *t, int curr_suite, int curr_test_case,
354			     int result, int width, int running)
355{
356	if (test_suite__num_test_cases(t) > 1) {
357		int subw = width > 2 ? width - 2 : width;
358
359		pr_info("%3d.%1d: %-*s:", curr_suite + 1, curr_test_case + 1, subw,
360			test_description(t, curr_test_case));
361	} else
362		pr_info("%3d: %-*s:", curr_suite + 1, width, test_description(t, curr_test_case));
363
364	switch (result) {
365	case TEST_RUNNING:
366		color_fprintf(stderr, PERF_COLOR_YELLOW, " Running (%d active)\n", running);
367		break;
368	case TEST_OK:
369		pr_info(" Ok\n");
370		break;
371	case TEST_SKIP: {
372		const char *reason = skip_reason(t, curr_test_case);
373
374		if (reason)
375			color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (%s)\n", reason);
376		else
377			color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
378	}
379		break;
380	case TEST_FAIL:
381	default:
382		color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
383		break;
384	}
385
386	return 0;
387}
388
389static void finish_test(struct child_test **child_tests, int running_test, int child_test_num,
390		int width)
391{
392	struct child_test *child_test = child_tests[running_test];
393	struct test_suite *t;
394	int curr_suite, curr_test_case, err;
395	bool err_done = false;
396	struct strbuf err_output = STRBUF_INIT;
397	int last_running = -1;
398	int ret;
399
400	if (child_test == NULL) {
401		/* Test wasn't started. */
402		return;
403	}
404	t = child_test->test;
405	curr_suite = child_test->suite_num;
406	curr_test_case = child_test->test_case_num;
407	err = child_test->process.err;
408	/*
409	 * For test suites with subtests, display the suite name ahead of the
410	 * sub test names.
411	 */
412	if (test_suite__num_test_cases(t) > 1 && curr_test_case == 0)
413		pr_info("%3d: %-*s:\n", curr_suite + 1, width, test_description(t, -1));
414
415	/*
416	 * Busy loop reading from the child's stdout/stderr that are set to be
417	 * non-blocking until EOF.
418	 */
419	if (err > 0)
420		fcntl(err, F_SETFL, O_NONBLOCK);
421	if (verbose > 1) {
422		if (test_suite__num_test_cases(t) > 1)
423			pr_info("%3d.%1d: %s:\n", curr_suite + 1, curr_test_case + 1,
424				test_description(t, curr_test_case));
425		else
426			pr_info("%3d: %s:\n", curr_suite + 1, test_description(t, -1));
427	}
428	while (!err_done) {
429		struct pollfd pfds[1] = {
430			{ .fd = err,
431			  .events = POLLIN | POLLERR | POLLHUP | POLLNVAL,
432			},
433		};
434		if (perf_use_color_default) {
435			int running = 0;
436
437			for (int y = running_test; y < child_test_num; y++) {
438				if (child_tests[y] == NULL)
439					continue;
440				if (check_if_command_finished(&child_tests[y]->process) == 0)
441					running++;
442			}
443			if (running != last_running) {
444				if (last_running != -1) {
445					/*
446					 * Erase "Running (.. active)" line
447					 * printed before poll/sleep.
448					 */
449					fprintf(debug_file(), PERF_COLOR_DELETE_LINE);
450				}
451				print_test_result(t, curr_suite, curr_test_case, TEST_RUNNING,
452						  width, running);
453				last_running = running;
454			}
455		}
456
457		err_done = true;
458		if (err <= 0) {
459			/* No child stderr to poll, sleep for 10ms for child to complete. */
460			usleep(10 * 1000);
461		} else {
462			/* Poll to avoid excessive spinning, timeout set for 100ms. */
463			poll(pfds, ARRAY_SIZE(pfds), /*timeout=*/100);
464			if (pfds[0].revents) {
465				char buf[512];
466				ssize_t len;
467
468				len = read(err, buf, sizeof(buf) - 1);
469
470				if (len > 0) {
471					err_done = false;
472					buf[len] = '\0';
473					strbuf_addstr(&err_output, buf);
474				}
475			}
476		}
477		if (err_done)
478			err_done = check_if_command_finished(&child_test->process);
479	}
480	if (perf_use_color_default && last_running != -1) {
481		/* Erase "Running (.. active)" line printed before poll/sleep. */
482		fprintf(debug_file(), PERF_COLOR_DELETE_LINE);
483	}
484	/* Clean up child process. */
485	ret = finish_command(&child_test->process);
486	if (verbose > 1 || (verbose == 1 && ret == TEST_FAIL))
487		fprintf(stderr, "%s", err_output.buf);
488
489	strbuf_release(&err_output);
490	print_test_result(t, curr_suite, curr_test_case, ret, width, /*running=*/0);
491	if (err > 0)
492		close(err);
493	zfree(&child_tests[running_test]);
494}
495
496static int start_test(struct test_suite *test, int curr_suite, int curr_test_case,
497		struct child_test **child, int width, int pass)
498{
499	int err;
500
501	*child = NULL;
502	if (dont_fork) {
503		if (pass == 1) {
504			pr_debug("--- start ---\n");
505			err = test_function(test, curr_test_case)(test, curr_test_case);
506			pr_debug("---- end ----\n");
507			print_test_result(test, curr_suite, curr_test_case, err, width,
508					  /*running=*/0);
509		}
510		return 0;
511	}
512	if (pass == 1 && !sequential && test_exclusive(test, curr_test_case)) {
513		/* When parallel, skip exclusive tests on the first pass. */
514		return 0;
515	}
516	if (pass != 1 && (sequential || !test_exclusive(test, curr_test_case))) {
517		/* Sequential and non-exclusive tests were run on the first pass. */
518		return 0;
519	}
520	*child = zalloc(sizeof(**child));
521	if (!*child)
522		return -ENOMEM;
523
524	(*child)->test = test;
525	(*child)->suite_num = curr_suite;
526	(*child)->test_case_num = curr_test_case;
527	(*child)->process.pid = -1;
528	(*child)->process.no_stdin = 1;
529	if (verbose <= 0) {
530		(*child)->process.no_stdout = 1;
531		(*child)->process.no_stderr = 1;
532	} else {
533		(*child)->process.stdout_to_stderr = 1;
534		(*child)->process.out = -1;
535		(*child)->process.err = -1;
536	}
537	(*child)->process.no_exec_cmd = run_test_child;
538	if (sequential || pass == 2) {
539		err = start_command(&(*child)->process);
540		if (err)
541			return err;
542		finish_test(child, /*running_test=*/0, /*child_test_num=*/1, width);
543		return 0;
544	}
545	return start_command(&(*child)->process);
546}
547
548/* State outside of __cmd_test for the sake of the signal handler. */
549
550static size_t num_tests;
551static struct child_test **child_tests;
552static jmp_buf cmd_test_jmp_buf;
553
554static void cmd_test_sig_handler(int sig)
555{
556	siglongjmp(cmd_test_jmp_buf, sig);
557}
558
559static int __cmd_test(struct test_suite **suites, int argc, const char *argv[],
560		      struct intlist *skiplist)
561{
562	static int width = 0;
563	int err = 0;
564
565	for (struct test_suite **t = suites; *t; t++) {
566		int i, len = strlen(test_description(*t, -1));
567
568		if (width < len)
569			width = len;
570
571		test_suite__for_each_test_case(*t, i) {
572			len = strlen(test_description(*t, i));
573			if (width < len)
574				width = len;
575			num_tests += runs_per_test;
576		}
577	}
578	child_tests = calloc(num_tests, sizeof(*child_tests));
579	if (!child_tests)
580		return -ENOMEM;
581
582	err = sigsetjmp(cmd_test_jmp_buf, 1);
583	if (err) {
584		pr_err("\nSignal (%d) while running tests.\nTerminating tests with the same signal\n",
585		       err);
586		for (size_t x = 0; x < num_tests; x++) {
587			struct child_test *child_test = child_tests[x];
588
589			if (!child_test || child_test->process.pid <= 0)
590				continue;
591
592			pr_debug3("Killing %d pid %d\n",
593				  child_test->suite_num + 1,
594				  child_test->process.pid);
595			kill(child_test->process.pid, err);
596		}
597		goto err_out;
598	}
599	signal(SIGINT, cmd_test_sig_handler);
600	signal(SIGTERM, cmd_test_sig_handler);
601
602	/*
603	 * In parallel mode pass 1 runs non-exclusive tests in parallel, pass 2
604	 * runs the exclusive tests sequentially. In other modes all tests are
605	 * run in pass 1.
606	 */
607	for (int pass = 1; pass <= 2; pass++) {
608		int child_test_num = 0;
609		int curr_suite = 0;
610
611		for (struct test_suite **t = suites; *t; t++, curr_suite++) {
612			int curr_test_case;
613			bool suite_matched = false;
614
615			if (!perf_test__matches(test_description(*t, -1), curr_suite, argc, argv)) {
616				/*
617				 * Test suite shouldn't be run based on
618				 * description. See if any test case should.
619				 */
620				bool skip = true;
621
622				test_suite__for_each_test_case(*t, curr_test_case) {
623					if (perf_test__matches(test_description(*t, curr_test_case),
624							       curr_suite, argc, argv)) {
625						skip = false;
626						break;
627					}
628				}
629				if (skip)
630					continue;
631			} else {
632				suite_matched = true;
633			}
634
635			if (intlist__find(skiplist, curr_suite + 1)) {
636				pr_info("%3d: %-*s:", curr_suite + 1, width,
637					test_description(*t, -1));
638				color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
639				continue;
640			}
641
642			for (unsigned int run = 0; run < runs_per_test; run++) {
643				test_suite__for_each_test_case(*t, curr_test_case) {
644					if (!suite_matched &&
645					    !perf_test__matches(test_description(*t, curr_test_case),
646								curr_suite, argc, argv))
647						continue;
648					err = start_test(*t, curr_suite, curr_test_case,
649							 &child_tests[child_test_num++],
650							 width, pass);
651					if (err)
652						goto err_out;
653				}
654			}
655		}
656		if (!sequential) {
657			/* Parallel mode starts tests but doesn't finish them. Do that now. */
658			for (size_t x = 0; x < num_tests; x++)
659				finish_test(child_tests, x, num_tests, width);
660		}
661	}
662err_out:
663	signal(SIGINT, SIG_DFL);
664	signal(SIGTERM, SIG_DFL);
665	if (err) {
666		pr_err("Internal test harness failure. Completing any started tests:\n:");
667		for (size_t x = 0; x < num_tests; x++)
668			finish_test(child_tests, x, num_tests, width);
669	}
670	free(child_tests);
671	return err;
672}
673
674static int perf_test__list(FILE *fp, struct test_suite **suites, int argc, const char **argv)
675{
676	int curr_suite = 0;
677
678	for (struct test_suite **t = suites; *t; t++, curr_suite++) {
679		int curr_test_case;
680
681		if (!perf_test__matches(test_description(*t, -1), curr_suite, argc, argv))
682			continue;
683
684		fprintf(fp, "%3d: %s\n", curr_suite + 1, test_description(*t, -1));
685
686		if (test_suite__num_test_cases(*t) <= 1)
687			continue;
688
689		test_suite__for_each_test_case(*t, curr_test_case) {
690			fprintf(fp, "%3d.%1d: %s\n", curr_suite + 1, curr_test_case + 1,
691				test_description(*t, curr_test_case));
692		}
693	}
694	return 0;
695}
696
697static int workloads__fprintf_list(FILE *fp)
698{
699	struct test_workload *twl;
700	int printed = 0;
701
702	workloads__for_each(twl)
703		printed += fprintf(fp, "%s\n", twl->name);
704
705	return printed;
706}
707
708static int run_workload(const char *work, int argc, const char **argv)
709{
710	struct test_workload *twl;
711
712	workloads__for_each(twl) {
713		if (!strcmp(twl->name, work))
714			return twl->func(argc, argv);
715	}
716
717	pr_info("No workload found: %s\n", work);
718	return -1;
719}
720
721static int perf_test__config(const char *var, const char *value,
722			     void *data __maybe_unused)
723{
724	if (!strcmp(var, "annotate.objdump"))
725		test_objdump_path = value;
726
727	return 0;
728}
729
730static struct test_suite **build_suites(void)
731{
732	/*
733	 * TODO: suites is static to avoid needing to clean up the scripts tests
734	 * for leak sanitizer.
735	 */
736	static struct test_suite **suites[] = {
737		generic_tests,
738		arch_tests,
739		NULL,
740	};
741	struct test_suite **result;
742	struct test_suite *t;
743	size_t n = 0, num_suites = 0;
744
745	if (suites[2] == NULL)
746		suites[2] = create_script_test_suites();
747
748#define for_each_suite(suite)						\
749	for (size_t i = 0, j = 0; i < ARRAY_SIZE(suites); i++, j = 0)	\
750		while ((suite = suites[i][j++]) != NULL)
751
752	for_each_suite(t)
753		num_suites++;
754
755	result = calloc(num_suites + 1, sizeof(struct test_suite *));
756
757	for (int pass = 1; pass <= 2; pass++) {
758		for_each_suite(t) {
759			bool exclusive = false;
760			int curr_test_case;
761
762			test_suite__for_each_test_case(t, curr_test_case) {
763				if (test_exclusive(t, curr_test_case)) {
764					exclusive = true;
765					break;
766				}
767			}
768			if ((!exclusive && pass == 1) || (exclusive && pass == 2))
769				result[n++] = t;
770		}
771	}
772	return result;
773#undef for_each_suite
774}
775
776int cmd_test(int argc, const char **argv)
777{
778	const char *test_usage[] = {
779	"perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
780	NULL,
781	};
782	const char *skip = NULL;
783	const char *workload = NULL;
784	bool list_workloads = false;
785	const struct option test_options[] = {
786	OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
787	OPT_INCR('v', "verbose", &verbose,
788		    "be more verbose (show symbol address, etc)"),
789	OPT_BOOLEAN('F', "dont-fork", &dont_fork,
790		    "Do not fork for testcase"),
791	OPT_BOOLEAN('S', "sequential", &sequential,
792		    "Run the tests one after another rather than in parallel"),
793	OPT_UINTEGER('r', "runs-per-test", &runs_per_test,
794		     "Run each test the given number of times, default 1"),
795	OPT_STRING('w', "workload", &workload, "work", "workload to run for testing, use '--list-workloads' to list the available ones."),
796	OPT_BOOLEAN(0, "list-workloads", &list_workloads, "List the available builtin workloads to use with -w/--workload"),
797	OPT_STRING(0, "dso", &dso_to_test, "dso", "dso to test"),
798	OPT_STRING(0, "objdump", &test_objdump_path, "path",
799		   "objdump binary to use for disassembly and annotations"),
800	OPT_END()
801	};
802	const char * const test_subcommands[] = { "list", NULL };
803	struct intlist *skiplist = NULL;
804        int ret = hists__init();
805	struct test_suite **suites;
806
807        if (ret < 0)
808                return ret;
809
810	perf_config(perf_test__config, NULL);
811
812	/* Unbuffered output */
813	setvbuf(stdout, NULL, _IONBF, 0);
814
815	argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
816	if (argc >= 1 && !strcmp(argv[0], "list")) {
817		suites = build_suites();
818		ret = perf_test__list(stdout, suites, argc - 1, argv + 1);
819		free(suites);
820		return ret;
821	}
822
823	if (workload)
824		return run_workload(workload, argc, argv);
825
826	if (list_workloads) {
827		workloads__fprintf_list(stdout);
828		return 0;
829	}
830
831	if (dont_fork)
832		sequential = true;
833
834	symbol_conf.priv_size = sizeof(int);
835	symbol_conf.try_vmlinux_path = true;
836
837
838	if (symbol__init(NULL) < 0)
839		return -1;
840
841	if (skip != NULL)
842		skiplist = intlist__new(skip);
843	/*
844	 * Tests that create BPF maps, for instance, need more than the 64K
845	 * default:
846	 */
847	rlimit__bump_memlock();
848
849	suites = build_suites();
850	ret = __cmd_test(suites, argc, argv, skiplist);
851	free(suites);
852	return ret;
853}