1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 Facebook
3 */
4 #define _GNU_SOURCE
5 #include "test_progs.h"
6 #include "cgroup_helpers.h"
7 #include "bpf_rlimit.h"
8 #include <argp.h>
9 #include <pthread.h>
10 #include <sched.h>
11 #include <signal.h>
12 #include <string.h>
13 #include <execinfo.h> /* backtrace */
14 #include <linux/membarrier.h>
15
16 /* Adapted from perf/util/string.c */
glob_match(const char * str,const char * pat)17 static bool glob_match(const char *str, const char *pat)
18 {
19 while (*str && *pat && *pat != '*') {
20 if (*str != *pat)
21 return false;
22 str++;
23 pat++;
24 }
25 /* Check wild card */
26 if (*pat == '*') {
27 while (*pat == '*')
28 pat++;
29 if (!*pat) /* Tail wild card matches all */
30 return true;
31 while (*str)
32 if (glob_match(str++, pat))
33 return true;
34 }
35 return !*str && !*pat;
36 }
37
38 #define EXIT_NO_TEST 2
39 #define EXIT_ERR_SETUP_INFRA 3
40
41 /* defined in test_progs.h */
42 struct test_env env = {};
43
44 struct prog_test_def {
45 const char *test_name;
46 int test_num;
47 void (*run_test)(void);
48 bool force_log;
49 int error_cnt;
50 int skip_cnt;
51 bool tested;
52 bool need_cgroup_cleanup;
53
54 char *subtest_name;
55 int subtest_num;
56
57 /* store counts before subtest started */
58 int old_error_cnt;
59 };
60
61 /* Override C runtime library's usleep() implementation to ensure nanosleep()
62 * is always called. Usleep is frequently used in selftests as a way to
63 * trigger kprobe and tracepoints.
64 */
usleep(useconds_t usec)65 int usleep(useconds_t usec)
66 {
67 struct timespec ts = {
68 .tv_sec = usec / 1000000,
69 .tv_nsec = (usec % 1000000) * 1000,
70 };
71
72 return syscall(__NR_nanosleep, &ts, NULL);
73 }
74
should_run(struct test_selector * sel,int num,const char * name)75 static bool should_run(struct test_selector *sel, int num, const char *name)
76 {
77 int i;
78
79 for (i = 0; i < sel->blacklist.cnt; i++) {
80 if (glob_match(name, sel->blacklist.strs[i]))
81 return false;
82 }
83
84 for (i = 0; i < sel->whitelist.cnt; i++) {
85 if (glob_match(name, sel->whitelist.strs[i]))
86 return true;
87 }
88
89 if (!sel->whitelist.cnt && !sel->num_set)
90 return true;
91
92 return num < sel->num_set_len && sel->num_set[num];
93 }
94
dump_test_log(const struct prog_test_def * test,bool failed)95 static void dump_test_log(const struct prog_test_def *test, bool failed)
96 {
97 if (stdout == env.stdout)
98 return;
99
100 fflush(stdout); /* exports env.log_buf & env.log_cnt */
101
102 if (env.verbosity > VERBOSE_NONE || test->force_log || failed) {
103 if (env.log_cnt) {
104 env.log_buf[env.log_cnt] = '\0';
105 fprintf(env.stdout, "%s", env.log_buf);
106 if (env.log_buf[env.log_cnt - 1] != '\n')
107 fprintf(env.stdout, "\n");
108 }
109 }
110
111 fseeko(stdout, 0, SEEK_SET); /* rewind */
112 }
113
skip_account(void)114 static void skip_account(void)
115 {
116 if (env.test->skip_cnt) {
117 env.skip_cnt++;
118 env.test->skip_cnt = 0;
119 }
120 }
121
122 static void stdio_restore(void);
123
124 /* A bunch of tests set custom affinity per-thread and/or per-process. Reset
125 * it after each test/sub-test.
126 */
reset_affinity()127 static void reset_affinity() {
128
129 cpu_set_t cpuset;
130 int i, err;
131
132 CPU_ZERO(&cpuset);
133 for (i = 0; i < env.nr_cpus; i++)
134 CPU_SET(i, &cpuset);
135
136 err = sched_setaffinity(0, sizeof(cpuset), &cpuset);
137 if (err < 0) {
138 stdio_restore();
139 fprintf(stderr, "Failed to reset process affinity: %d!\n", err);
140 exit(EXIT_ERR_SETUP_INFRA);
141 }
142 err = pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset);
143 if (err < 0) {
144 stdio_restore();
145 fprintf(stderr, "Failed to reset thread affinity: %d!\n", err);
146 exit(EXIT_ERR_SETUP_INFRA);
147 }
148 }
149
save_netns(void)150 static void save_netns(void)
151 {
152 env.saved_netns_fd = open("/proc/self/ns/net", O_RDONLY);
153 if (env.saved_netns_fd == -1) {
154 perror("open(/proc/self/ns/net)");
155 exit(EXIT_ERR_SETUP_INFRA);
156 }
157 }
158
restore_netns(void)159 static void restore_netns(void)
160 {
161 if (setns(env.saved_netns_fd, CLONE_NEWNET) == -1) {
162 stdio_restore();
163 perror("setns(CLONE_NEWNS)");
164 exit(EXIT_ERR_SETUP_INFRA);
165 }
166 }
167
test__end_subtest()168 void test__end_subtest()
169 {
170 struct prog_test_def *test = env.test;
171 int sub_error_cnt = test->error_cnt - test->old_error_cnt;
172
173 dump_test_log(test, sub_error_cnt);
174
175 fprintf(env.stdout, "#%d/%d %s/%s:%s\n",
176 test->test_num, test->subtest_num, test->test_name, test->subtest_name,
177 sub_error_cnt ? "FAIL" : (test->skip_cnt ? "SKIP" : "OK"));
178
179 if (sub_error_cnt)
180 env.fail_cnt++;
181 else if (test->skip_cnt == 0)
182 env.sub_succ_cnt++;
183 skip_account();
184
185 free(test->subtest_name);
186 test->subtest_name = NULL;
187 }
188
test__start_subtest(const char * name)189 bool test__start_subtest(const char *name)
190 {
191 struct prog_test_def *test = env.test;
192
193 if (test->subtest_name)
194 test__end_subtest();
195
196 test->subtest_num++;
197
198 if (!name || !name[0]) {
199 fprintf(env.stderr,
200 "Subtest #%d didn't provide sub-test name!\n",
201 test->subtest_num);
202 return false;
203 }
204
205 if (!should_run(&env.subtest_selector, test->subtest_num, name))
206 return false;
207
208 test->subtest_name = strdup(name);
209 if (!test->subtest_name) {
210 fprintf(env.stderr,
211 "Subtest #%d: failed to copy subtest name!\n",
212 test->subtest_num);
213 return false;
214 }
215 env.test->old_error_cnt = env.test->error_cnt;
216
217 return true;
218 }
219
test__force_log()220 void test__force_log() {
221 env.test->force_log = true;
222 }
223
test__skip(void)224 void test__skip(void)
225 {
226 env.test->skip_cnt++;
227 }
228
test__fail(void)229 void test__fail(void)
230 {
231 env.test->error_cnt++;
232 }
233
test__join_cgroup(const char * path)234 int test__join_cgroup(const char *path)
235 {
236 int fd;
237
238 if (!env.test->need_cgroup_cleanup) {
239 if (setup_cgroup_environment()) {
240 fprintf(stderr,
241 "#%d %s: Failed to setup cgroup environment\n",
242 env.test->test_num, env.test->test_name);
243 return -1;
244 }
245
246 env.test->need_cgroup_cleanup = true;
247 }
248
249 fd = create_and_get_cgroup(path);
250 if (fd < 0) {
251 fprintf(stderr,
252 "#%d %s: Failed to create cgroup '%s' (errno=%d)\n",
253 env.test->test_num, env.test->test_name, path, errno);
254 return fd;
255 }
256
257 if (join_cgroup(path)) {
258 fprintf(stderr,
259 "#%d %s: Failed to join cgroup '%s' (errno=%d)\n",
260 env.test->test_num, env.test->test_name, path, errno);
261 return -1;
262 }
263
264 return fd;
265 }
266
bpf_find_map(const char * test,struct bpf_object * obj,const char * name)267 int bpf_find_map(const char *test, struct bpf_object *obj, const char *name)
268 {
269 struct bpf_map *map;
270
271 map = bpf_object__find_map_by_name(obj, name);
272 if (!map) {
273 fprintf(stdout, "%s:FAIL:map '%s' not found\n", test, name);
274 test__fail();
275 return -1;
276 }
277 return bpf_map__fd(map);
278 }
279
is_jit_enabled(void)280 static bool is_jit_enabled(void)
281 {
282 const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
283 bool enabled = false;
284 int sysctl_fd;
285
286 sysctl_fd = open(jit_sysctl, 0, O_RDONLY);
287 if (sysctl_fd != -1) {
288 char tmpc;
289
290 if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
291 enabled = (tmpc != '0');
292 close(sysctl_fd);
293 }
294
295 return enabled;
296 }
297
compare_map_keys(int map1_fd,int map2_fd)298 int compare_map_keys(int map1_fd, int map2_fd)
299 {
300 __u32 key, next_key;
301 char val_buf[PERF_MAX_STACK_DEPTH *
302 sizeof(struct bpf_stack_build_id)];
303 int err;
304
305 err = bpf_map_get_next_key(map1_fd, NULL, &key);
306 if (err)
307 return err;
308 err = bpf_map_lookup_elem(map2_fd, &key, val_buf);
309 if (err)
310 return err;
311
312 while (bpf_map_get_next_key(map1_fd, &key, &next_key) == 0) {
313 err = bpf_map_lookup_elem(map2_fd, &next_key, val_buf);
314 if (err)
315 return err;
316
317 key = next_key;
318 }
319 if (errno != ENOENT)
320 return -1;
321
322 return 0;
323 }
324
compare_stack_ips(int smap_fd,int amap_fd,int stack_trace_len)325 int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len)
326 {
327 __u32 key, next_key, *cur_key_p, *next_key_p;
328 char *val_buf1, *val_buf2;
329 int i, err = 0;
330
331 val_buf1 = malloc(stack_trace_len);
332 val_buf2 = malloc(stack_trace_len);
333 cur_key_p = NULL;
334 next_key_p = &key;
335 while (bpf_map_get_next_key(smap_fd, cur_key_p, next_key_p) == 0) {
336 err = bpf_map_lookup_elem(smap_fd, next_key_p, val_buf1);
337 if (err)
338 goto out;
339 err = bpf_map_lookup_elem(amap_fd, next_key_p, val_buf2);
340 if (err)
341 goto out;
342 for (i = 0; i < stack_trace_len; i++) {
343 if (val_buf1[i] != val_buf2[i]) {
344 err = -1;
345 goto out;
346 }
347 }
348 key = *next_key_p;
349 cur_key_p = &key;
350 next_key_p = &next_key;
351 }
352 if (errno != ENOENT)
353 err = -1;
354
355 out:
356 free(val_buf1);
357 free(val_buf2);
358 return err;
359 }
360
extract_build_id(char * build_id,size_t size)361 int extract_build_id(char *build_id, size_t size)
362 {
363 FILE *fp;
364 char *line = NULL;
365 size_t len = 0;
366
367 fp = popen("readelf -n ./urandom_read | grep 'Build ID'", "r");
368 if (fp == NULL)
369 return -1;
370
371 if (getline(&line, &len, fp) == -1)
372 goto err;
373 pclose(fp);
374
375 if (len > size)
376 len = size;
377 memcpy(build_id, line, len);
378 build_id[len] = '\0';
379 free(line);
380 return 0;
381 err:
382 pclose(fp);
383 return -1;
384 }
385
finit_module(int fd,const char * param_values,int flags)386 static int finit_module(int fd, const char *param_values, int flags)
387 {
388 return syscall(__NR_finit_module, fd, param_values, flags);
389 }
390
delete_module(const char * name,int flags)391 static int delete_module(const char *name, int flags)
392 {
393 return syscall(__NR_delete_module, name, flags);
394 }
395
396 /*
397 * Trigger synchronize_rcu() in kernel.
398 */
kern_sync_rcu(void)399 int kern_sync_rcu(void)
400 {
401 return syscall(__NR_membarrier, MEMBARRIER_CMD_SHARED, 0, 0);
402 }
403
unload_bpf_testmod(void)404 static void unload_bpf_testmod(void)
405 {
406 if (kern_sync_rcu())
407 fprintf(env.stderr, "Failed to trigger kernel-side RCU sync!\n");
408 if (delete_module("bpf_testmod", 0)) {
409 if (errno == ENOENT) {
410 if (env.verbosity > VERBOSE_NONE)
411 fprintf(stdout, "bpf_testmod.ko is already unloaded.\n");
412 return;
413 }
414 fprintf(env.stderr, "Failed to unload bpf_testmod.ko from kernel: %d\n", -errno);
415 return;
416 }
417 if (env.verbosity > VERBOSE_NONE)
418 fprintf(stdout, "Successfully unloaded bpf_testmod.ko.\n");
419 }
420
load_bpf_testmod(void)421 static int load_bpf_testmod(void)
422 {
423 int fd;
424
425 /* ensure previous instance of the module is unloaded */
426 unload_bpf_testmod();
427
428 if (env.verbosity > VERBOSE_NONE)
429 fprintf(stdout, "Loading bpf_testmod.ko...\n");
430
431 fd = open("bpf_testmod.ko", O_RDONLY);
432 if (fd < 0) {
433 fprintf(env.stderr, "Can't find bpf_testmod.ko kernel module: %d\n", -errno);
434 return -ENOENT;
435 }
436 if (finit_module(fd, "", 0)) {
437 fprintf(env.stderr, "Failed to load bpf_testmod.ko into the kernel: %d\n", -errno);
438 close(fd);
439 return -EINVAL;
440 }
441 close(fd);
442
443 if (env.verbosity > VERBOSE_NONE)
444 fprintf(stdout, "Successfully loaded bpf_testmod.ko.\n");
445 return 0;
446 }
447
448 /* extern declarations for test funcs */
449 #define DEFINE_TEST(name) extern void test_##name(void);
450 #include <prog_tests/tests.h>
451 #undef DEFINE_TEST
452
453 static struct prog_test_def prog_test_defs[] = {
454 #define DEFINE_TEST(name) { \
455 .test_name = #name, \
456 .run_test = &test_##name, \
457 },
458 #include <prog_tests/tests.h>
459 #undef DEFINE_TEST
460 };
461 const int prog_test_cnt = ARRAY_SIZE(prog_test_defs);
462
463 const char *argp_program_version = "test_progs 0.1";
464 const char *argp_program_bug_address = "<bpf@vger.kernel.org>";
465 const char argp_program_doc[] = "BPF selftests test runner";
466
467 enum ARG_KEYS {
468 ARG_TEST_NUM = 'n',
469 ARG_TEST_NAME = 't',
470 ARG_TEST_NAME_BLACKLIST = 'b',
471 ARG_VERIFIER_STATS = 's',
472 ARG_VERBOSE = 'v',
473 ARG_GET_TEST_CNT = 'c',
474 ARG_LIST_TEST_NAMES = 'l',
475 ARG_TEST_NAME_GLOB_ALLOWLIST = 'a',
476 ARG_TEST_NAME_GLOB_DENYLIST = 'd',
477 };
478
479 static const struct argp_option opts[] = {
480 { "num", ARG_TEST_NUM, "NUM", 0,
481 "Run test number NUM only " },
482 { "name", ARG_TEST_NAME, "NAMES", 0,
483 "Run tests with names containing any string from NAMES list" },
484 { "name-blacklist", ARG_TEST_NAME_BLACKLIST, "NAMES", 0,
485 "Don't run tests with names containing any string from NAMES list" },
486 { "verifier-stats", ARG_VERIFIER_STATS, NULL, 0,
487 "Output verifier statistics", },
488 { "verbose", ARG_VERBOSE, "LEVEL", OPTION_ARG_OPTIONAL,
489 "Verbose output (use -vv or -vvv for progressively verbose output)" },
490 { "count", ARG_GET_TEST_CNT, NULL, 0,
491 "Get number of selected top-level tests " },
492 { "list", ARG_LIST_TEST_NAMES, NULL, 0,
493 "List test names that would run (without running them) " },
494 { "allow", ARG_TEST_NAME_GLOB_ALLOWLIST, "NAMES", 0,
495 "Run tests with name matching the pattern (supports '*' wildcard)." },
496 { "deny", ARG_TEST_NAME_GLOB_DENYLIST, "NAMES", 0,
497 "Don't run tests with name matching the pattern (supports '*' wildcard)." },
498 {},
499 };
500
libbpf_print_fn(enum libbpf_print_level level,const char * format,va_list args)501 static int libbpf_print_fn(enum libbpf_print_level level,
502 const char *format, va_list args)
503 {
504 if (env.verbosity < VERBOSE_VERY && level == LIBBPF_DEBUG)
505 return 0;
506 vfprintf(stdout, format, args);
507 return 0;
508 }
509
free_str_set(const struct str_set * set)510 static void free_str_set(const struct str_set *set)
511 {
512 int i;
513
514 if (!set)
515 return;
516
517 for (i = 0; i < set->cnt; i++)
518 free((void *)set->strs[i]);
519 free(set->strs);
520 }
521
parse_str_list(const char * s,struct str_set * set,bool is_glob_pattern)522 static int parse_str_list(const char *s, struct str_set *set, bool is_glob_pattern)
523 {
524 char *input, *state = NULL, *next, **tmp, **strs = NULL;
525 int i, cnt = 0;
526
527 input = strdup(s);
528 if (!input)
529 return -ENOMEM;
530
531 while ((next = strtok_r(state ? NULL : input, ",", &state))) {
532 tmp = realloc(strs, sizeof(*strs) * (cnt + 1));
533 if (!tmp)
534 goto err;
535 strs = tmp;
536
537 if (is_glob_pattern) {
538 strs[cnt] = strdup(next);
539 if (!strs[cnt])
540 goto err;
541 } else {
542 strs[cnt] = malloc(strlen(next) + 2 + 1);
543 if (!strs[cnt])
544 goto err;
545 sprintf(strs[cnt], "*%s*", next);
546 }
547
548 cnt++;
549 }
550
551 tmp = realloc(set->strs, sizeof(*strs) * (cnt + set->cnt));
552 if (!tmp)
553 goto err;
554 memcpy(tmp + set->cnt, strs, sizeof(*strs) * cnt);
555 set->strs = (const char **)tmp;
556 set->cnt += cnt;
557
558 free(input);
559 free(strs);
560 return 0;
561 err:
562 for (i = 0; i < cnt; i++)
563 free(strs[i]);
564 free(strs);
565 free(input);
566 return -ENOMEM;
567 }
568
569 extern int extra_prog_load_log_flags;
570
parse_arg(int key,char * arg,struct argp_state * state)571 static error_t parse_arg(int key, char *arg, struct argp_state *state)
572 {
573 struct test_env *env = state->input;
574
575 switch (key) {
576 case ARG_TEST_NUM: {
577 char *subtest_str = strchr(arg, '/');
578
579 if (subtest_str) {
580 *subtest_str = '\0';
581 if (parse_num_list(subtest_str + 1,
582 &env->subtest_selector.num_set,
583 &env->subtest_selector.num_set_len)) {
584 fprintf(stderr,
585 "Failed to parse subtest numbers.\n");
586 return -EINVAL;
587 }
588 }
589 if (parse_num_list(arg, &env->test_selector.num_set,
590 &env->test_selector.num_set_len)) {
591 fprintf(stderr, "Failed to parse test numbers.\n");
592 return -EINVAL;
593 }
594 break;
595 }
596 case ARG_TEST_NAME_GLOB_ALLOWLIST:
597 case ARG_TEST_NAME: {
598 char *subtest_str = strchr(arg, '/');
599
600 if (subtest_str) {
601 *subtest_str = '\0';
602 if (parse_str_list(subtest_str + 1,
603 &env->subtest_selector.whitelist,
604 key == ARG_TEST_NAME_GLOB_ALLOWLIST))
605 return -ENOMEM;
606 }
607 if (parse_str_list(arg, &env->test_selector.whitelist,
608 key == ARG_TEST_NAME_GLOB_ALLOWLIST))
609 return -ENOMEM;
610 break;
611 }
612 case ARG_TEST_NAME_GLOB_DENYLIST:
613 case ARG_TEST_NAME_BLACKLIST: {
614 char *subtest_str = strchr(arg, '/');
615
616 if (subtest_str) {
617 *subtest_str = '\0';
618 if (parse_str_list(subtest_str + 1,
619 &env->subtest_selector.blacklist,
620 key == ARG_TEST_NAME_GLOB_DENYLIST))
621 return -ENOMEM;
622 }
623 if (parse_str_list(arg, &env->test_selector.blacklist,
624 key == ARG_TEST_NAME_GLOB_DENYLIST))
625 return -ENOMEM;
626 break;
627 }
628 case ARG_VERIFIER_STATS:
629 env->verifier_stats = true;
630 break;
631 case ARG_VERBOSE:
632 env->verbosity = VERBOSE_NORMAL;
633 if (arg) {
634 if (strcmp(arg, "v") == 0) {
635 env->verbosity = VERBOSE_VERY;
636 extra_prog_load_log_flags = 1;
637 } else if (strcmp(arg, "vv") == 0) {
638 env->verbosity = VERBOSE_SUPER;
639 extra_prog_load_log_flags = 2;
640 } else {
641 fprintf(stderr,
642 "Unrecognized verbosity setting ('%s'), only -v and -vv are supported\n",
643 arg);
644 return -EINVAL;
645 }
646 }
647
648 if (env->verbosity > VERBOSE_NONE) {
649 if (setenv("SELFTESTS_VERBOSE", "1", 1) == -1) {
650 fprintf(stderr,
651 "Unable to setenv SELFTESTS_VERBOSE=1 (errno=%d)",
652 errno);
653 return -1;
654 }
655 }
656
657 break;
658 case ARG_GET_TEST_CNT:
659 env->get_test_cnt = true;
660 break;
661 case ARG_LIST_TEST_NAMES:
662 env->list_test_names = true;
663 break;
664 case ARGP_KEY_ARG:
665 argp_usage(state);
666 break;
667 case ARGP_KEY_END:
668 break;
669 default:
670 return ARGP_ERR_UNKNOWN;
671 }
672 return 0;
673 }
674
stdio_hijack(void)675 static void stdio_hijack(void)
676 {
677 #ifdef __GLIBC__
678 env.stdout = stdout;
679 env.stderr = stderr;
680
681 if (env.verbosity > VERBOSE_NONE) {
682 /* nothing to do, output to stdout by default */
683 return;
684 }
685
686 /* stdout and stderr -> buffer */
687 fflush(stdout);
688
689 stdout = open_memstream(&env.log_buf, &env.log_cnt);
690 if (!stdout) {
691 stdout = env.stdout;
692 perror("open_memstream");
693 return;
694 }
695
696 stderr = stdout;
697 #endif
698 }
699
stdio_restore(void)700 static void stdio_restore(void)
701 {
702 #ifdef __GLIBC__
703 if (stdout == env.stdout)
704 return;
705
706 fclose(stdout);
707 free(env.log_buf);
708
709 env.log_buf = NULL;
710 env.log_cnt = 0;
711
712 stdout = env.stdout;
713 stderr = env.stderr;
714 #endif
715 }
716
717 /*
718 * Determine if test_progs is running as a "flavored" test runner and switch
719 * into corresponding sub-directory to load correct BPF objects.
720 *
721 * This is done by looking at executable name. If it contains "-flavor"
722 * suffix, then we are running as a flavored test runner.
723 */
cd_flavor_subdir(const char * exec_name)724 int cd_flavor_subdir(const char *exec_name)
725 {
726 /* General form of argv[0] passed here is:
727 * some/path/to/test_progs[-flavor], where -flavor part is optional.
728 * First cut out "test_progs[-flavor]" part, then extract "flavor"
729 * part, if it's there.
730 */
731 const char *flavor = strrchr(exec_name, '/');
732
733 if (!flavor)
734 return 0;
735 flavor++;
736 flavor = strrchr(flavor, '-');
737 if (!flavor)
738 return 0;
739 flavor++;
740 if (env.verbosity > VERBOSE_NONE)
741 fprintf(stdout, "Switching to flavor '%s' subdirectory...\n", flavor);
742
743 return chdir(flavor);
744 }
745
746 #define MAX_BACKTRACE_SZ 128
crash_handler(int signum)747 void crash_handler(int signum)
748 {
749 void *bt[MAX_BACKTRACE_SZ];
750 size_t sz;
751
752 sz = backtrace(bt, ARRAY_SIZE(bt));
753
754 if (env.test)
755 dump_test_log(env.test, true);
756 if (env.stdout)
757 stdio_restore();
758
759 fprintf(stderr, "Caught signal #%d!\nStack trace:\n", signum);
760 backtrace_symbols_fd(bt, sz, STDERR_FILENO);
761 }
762
main(int argc,char ** argv)763 int main(int argc, char **argv)
764 {
765 static const struct argp argp = {
766 .options = opts,
767 .parser = parse_arg,
768 .doc = argp_program_doc,
769 };
770 struct sigaction sigact = {
771 .sa_handler = crash_handler,
772 .sa_flags = SA_RESETHAND,
773 };
774 int err, i;
775
776 sigaction(SIGSEGV, &sigact, NULL);
777
778 err = argp_parse(&argp, argc, argv, 0, NULL, &env);
779 if (err)
780 return err;
781
782 err = cd_flavor_subdir(argv[0]);
783 if (err)
784 return err;
785
786 /* Use libbpf 1.0 API mode */
787 libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
788
789 libbpf_set_print(libbpf_print_fn);
790
791 srand(time(NULL));
792
793 env.jit_enabled = is_jit_enabled();
794 env.nr_cpus = libbpf_num_possible_cpus();
795 if (env.nr_cpus < 0) {
796 fprintf(stderr, "Failed to get number of CPUs: %d!\n",
797 env.nr_cpus);
798 return -1;
799 }
800
801 save_netns();
802 stdio_hijack();
803 env.has_testmod = true;
804 if (!env.list_test_names && load_bpf_testmod()) {
805 fprintf(env.stderr, "WARNING! Selftests relying on bpf_testmod.ko will be skipped.\n");
806 env.has_testmod = false;
807 }
808 for (i = 0; i < prog_test_cnt; i++) {
809 struct prog_test_def *test = &prog_test_defs[i];
810
811 env.test = test;
812 test->test_num = i + 1;
813
814 if (!should_run(&env.test_selector,
815 test->test_num, test->test_name))
816 continue;
817
818 if (env.get_test_cnt) {
819 env.succ_cnt++;
820 continue;
821 }
822
823 if (env.list_test_names) {
824 fprintf(env.stdout, "%s\n", test->test_name);
825 env.succ_cnt++;
826 continue;
827 }
828
829 test->run_test();
830 /* ensure last sub-test is finalized properly */
831 if (test->subtest_name)
832 test__end_subtest();
833
834 test->tested = true;
835
836 dump_test_log(test, test->error_cnt);
837
838 fprintf(env.stdout, "#%d %s:%s\n",
839 test->test_num, test->test_name,
840 test->error_cnt ? "FAIL" : (test->skip_cnt ? "SKIP" : "OK"));
841
842 if (test->error_cnt)
843 env.fail_cnt++;
844 else
845 env.succ_cnt++;
846 skip_account();
847
848 reset_affinity();
849 restore_netns();
850 if (test->need_cgroup_cleanup)
851 cleanup_cgroup_environment();
852 }
853 if (!env.list_test_names && env.has_testmod)
854 unload_bpf_testmod();
855 stdio_restore();
856
857 if (env.get_test_cnt) {
858 printf("%d\n", env.succ_cnt);
859 goto out;
860 }
861
862 if (env.list_test_names)
863 goto out;
864
865 fprintf(stdout, "Summary: %d/%d PASSED, %d SKIPPED, %d FAILED\n",
866 env.succ_cnt, env.sub_succ_cnt, env.skip_cnt, env.fail_cnt);
867
868 out:
869 free_str_set(&env.test_selector.blacklist);
870 free_str_set(&env.test_selector.whitelist);
871 free(env.test_selector.num_set);
872 free_str_set(&env.subtest_selector.blacklist);
873 free_str_set(&env.subtest_selector.whitelist);
874 free(env.subtest_selector.num_set);
875 close(env.saved_netns_fd);
876
877 if (env.succ_cnt + env.fail_cnt + env.skip_cnt == 0)
878 return EXIT_NO_TEST;
879
880 return env.fail_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
881 }
882