1 /*
2  * Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
3  * Use of this source code is governed by the GPLv2 license.
4  *
5  * kselftest_harness.h: simple C unit test helper.
6  *
7  * See documentation in Documentation/dev-tools/kselftest.rst
8  *
9  * API inspired by code.google.com/p/googletest
10  */
11 
12 /**
13  * DOC: example
14  *
15  * .. code-block:: c
16  *
17  *    #include "../kselftest_harness.h"
18  *
19  *    TEST(standalone_test) {
20  *      do_some_stuff;
21  *      EXPECT_GT(10, stuff) {
22  *         stuff_state_t state;
23  *         enumerate_stuff_state(&state);
24  *         TH_LOG("expectation failed with state: %s", state.msg);
25  *      }
26  *      more_stuff;
27  *      ASSERT_NE(some_stuff, NULL) TH_LOG("how did it happen?!");
28  *      last_stuff;
29  *      EXPECT_EQ(0, last_stuff);
30  *    }
31  *
32  *    FIXTURE(my_fixture) {
33  *      mytype_t *data;
34  *      int awesomeness_level;
35  *    };
36  *    FIXTURE_SETUP(my_fixture) {
37  *      self->data = mytype_new();
38  *      ASSERT_NE(NULL, self->data);
39  *    }
40  *    FIXTURE_TEARDOWN(my_fixture) {
41  *      mytype_free(self->data);
42  *    }
43  *    TEST_F(my_fixture, data_is_good) {
44  *      EXPECT_EQ(1, is_my_data_good(self->data));
45  *    }
46  *
47  *    TEST_HARNESS_MAIN
48  */
49 
50 #ifndef __KSELFTEST_HARNESS_H
51 #define __KSELFTEST_HARNESS_H
52 
53 #define _GNU_SOURCE
54 #include <asm/types.h>
55 #include <errno.h>
56 #include <stdbool.h>
57 #include <stdint.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <sys/types.h>
62 #include <sys/wait.h>
63 #include <unistd.h>
64 
65 
66 /* Utilities exposed to the test definitions */
67 #ifndef TH_LOG_STREAM
68 #  define TH_LOG_STREAM stderr
69 #endif
70 
71 #ifndef TH_LOG_ENABLED
72 #  define TH_LOG_ENABLED 1
73 #endif
74 
75 /**
76  * TH_LOG(fmt, ...)
77  *
78  * @fmt: format string
79  * @...: optional arguments
80  *
81  * .. code-block:: c
82  *
83  *     TH_LOG(format, ...)
84  *
85  * Optional debug logging function available for use in tests.
86  * Logging may be enabled or disabled by defining TH_LOG_ENABLED.
87  * E.g., #define TH_LOG_ENABLED 1
88  *
89  * If no definition is provided, logging is enabled by default.
90  *
91  * If there is no way to print an error message for the process running the
92  * test (e.g. not allowed to write to stderr), it is still possible to get the
93  * ASSERT_* number for which the test failed.  This behavior can be enabled by
94  * writing `_metadata->no_print = true;` before the check sequence that is
95  * unable to print.  When an error occur, instead of printing an error message
96  * and calling `abort(3)`, the test process call `_exit(2)` with the assert
97  * number as argument, which is then printed by the parent process.
98  */
99 #define TH_LOG(fmt, ...) do { \
100 	if (TH_LOG_ENABLED) \
101 		__TH_LOG(fmt, ##__VA_ARGS__); \
102 } while (0)
103 
104 /* Unconditional logger for internal use. */
105 #define __TH_LOG(fmt, ...) \
106 		fprintf(TH_LOG_STREAM, "%s:%d:%s:" fmt "\n", \
107 			__FILE__, __LINE__, _metadata->name, ##__VA_ARGS__)
108 
109 /**
110  * XFAIL(statement, fmt, ...)
111  *
112  * @statement: statement to run after reporting XFAIL
113  * @fmt: format string
114  * @...: optional arguments
115  *
116  * This forces a "pass" after reporting a failure with an XFAIL prefix,
117  * and runs "statement", which is usually "return" or "goto skip".
118  */
119 #define XFAIL(statement, fmt, ...) do { \
120 	if (TH_LOG_ENABLED) { \
121 		fprintf(TH_LOG_STREAM, "[  XFAIL!  ] " fmt "\n", \
122 			##__VA_ARGS__); \
123 	} \
124 	/* TODO: find a way to pass xfail to test runner process. */ \
125 	_metadata->passed = 1; \
126 	_metadata->trigger = 0; \
127 	statement; \
128 } while (0)
129 
130 /**
131  * TEST(test_name) - Defines the test function and creates the registration
132  * stub
133  *
134  * @test_name: test name
135  *
136  * .. code-block:: c
137  *
138  *     TEST(name) { implementation }
139  *
140  * Defines a test by name.
141  * Names must be unique and tests must not be run in parallel.  The
142  * implementation containing block is a function and scoping should be treated
143  * as such.  Returning early may be performed with a bare "return;" statement.
144  *
145  * EXPECT_* and ASSERT_* are valid in a TEST() { } context.
146  */
147 #define TEST(test_name) __TEST_IMPL(test_name, -1)
148 
149 /**
150  * TEST_SIGNAL(test_name, signal)
151  *
152  * @test_name: test name
153  * @signal: signal number
154  *
155  * .. code-block:: c
156  *
157  *     TEST_SIGNAL(name, signal) { implementation }
158  *
159  * Defines a test by name and the expected term signal.
160  * Names must be unique and tests must not be run in parallel.  The
161  * implementation containing block is a function and scoping should be treated
162  * as such.  Returning early may be performed with a bare "return;" statement.
163  *
164  * EXPECT_* and ASSERT_* are valid in a TEST() { } context.
165  */
166 #define TEST_SIGNAL(test_name, signal) __TEST_IMPL(test_name, signal)
167 
168 #define __TEST_IMPL(test_name, _signal) \
169 	static void test_name(struct __test_metadata *_metadata); \
170 	static struct __test_metadata _##test_name##_object = \
171 		{ name: "global." #test_name, \
172 		  fn: &test_name, termsig: _signal }; \
173 	static void __attribute__((constructor)) _register_##test_name(void) \
174 	{ \
175 		__register_test(&_##test_name##_object); \
176 	} \
177 	static void test_name( \
178 		struct __test_metadata __attribute__((unused)) *_metadata)
179 
180 /**
181  * FIXTURE_DATA(datatype_name) - Wraps the struct name so we have one less
182  * argument to pass around
183  *
184  * @datatype_name: datatype name
185  *
186  * .. code-block:: c
187  *
188  *     FIXTURE_DATA(datatype name)
189  *
190  * This call may be used when the type of the fixture data
191  * is needed.  In general, this should not be needed unless
192  * the *self* is being passed to a helper directly.
193  */
194 #define FIXTURE_DATA(datatype_name) struct _test_data_##datatype_name
195 
196 /**
197  * FIXTURE(fixture_name) - Called once per fixture to setup the data and
198  * register
199  *
200  * @fixture_name: fixture name
201  *
202  * .. code-block:: c
203  *
204  *     FIXTURE(datatype name) {
205  *       type property1;
206  *       ...
207  *     };
208  *
209  * Defines the data provided to TEST_F()-defined tests as *self*.  It should be
210  * populated and cleaned up using FIXTURE_SETUP() and FIXTURE_TEARDOWN().
211  */
212 #define FIXTURE(fixture_name) \
213 	static void __attribute__((constructor)) \
214 	_register_##fixture_name##_data(void) \
215 	{ \
216 		__fixture_count++; \
217 	} \
218 	FIXTURE_DATA(fixture_name)
219 
220 /**
221  * FIXTURE_SETUP(fixture_name) - Prepares the setup function for the fixture.
222  * *_metadata* is included so that EXPECT_* and ASSERT_* work correctly.
223  *
224  * @fixture_name: fixture name
225  *
226  * .. code-block:: c
227  *
228  *     FIXTURE_SETUP(fixture name) { implementation }
229  *
230  * Populates the required "setup" function for a fixture.  An instance of the
231  * datatype defined with FIXTURE_DATA() will be exposed as *self* for the
232  * implementation.
233  *
234  * ASSERT_* are valid for use in this context and will prempt the execution
235  * of any dependent fixture tests.
236  *
237  * A bare "return;" statement may be used to return early.
238  */
239 #define FIXTURE_SETUP(fixture_name) \
240 	void fixture_name##_setup( \
241 		struct __test_metadata __attribute__((unused)) *_metadata, \
242 		FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
243 /**
244  * FIXTURE_TEARDOWN(fixture_name)
245  * *_metadata* is included so that EXPECT_* and ASSERT_* work correctly.
246  *
247  * @fixture_name: fixture name
248  *
249  * .. code-block:: c
250  *
251  *     FIXTURE_TEARDOWN(fixture name) { implementation }
252  *
253  * Populates the required "teardown" function for a fixture.  An instance of the
254  * datatype defined with FIXTURE_DATA() will be exposed as *self* for the
255  * implementation to clean up.
256  *
257  * A bare "return;" statement may be used to return early.
258  */
259 #define FIXTURE_TEARDOWN(fixture_name) \
260 	void fixture_name##_teardown( \
261 		struct __test_metadata __attribute__((unused)) *_metadata, \
262 		FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
263 
264 /**
265  * TEST_F(fixture_name, test_name) - Emits test registration and helpers for
266  * fixture-based test cases
267  *
268  * @fixture_name: fixture name
269  * @test_name: test name
270  *
271  * .. code-block:: c
272  *
273  *     TEST_F(fixture, name) { implementation }
274  *
275  * Defines a test that depends on a fixture (e.g., is part of a test case).
276  * Very similar to TEST() except that *self* is the setup instance of fixture's
277  * datatype exposed for use by the implementation.
278  *
279  * Warning: use of ASSERT_* here will skip TEARDOWN.
280  */
281 /* TODO(wad) register fixtures on dedicated test lists. */
282 #define TEST_F(fixture_name, test_name) \
283 	__TEST_F_IMPL(fixture_name, test_name, -1)
284 
285 #define TEST_F_SIGNAL(fixture_name, test_name, signal) \
286 	__TEST_F_IMPL(fixture_name, test_name, signal)
287 
288 #define __TEST_F_IMPL(fixture_name, test_name, signal) \
289 	static void fixture_name##_##test_name( \
290 		struct __test_metadata *_metadata, \
291 		FIXTURE_DATA(fixture_name) *self); \
292 	static inline void wrapper_##fixture_name##_##test_name( \
293 		struct __test_metadata *_metadata) \
294 	{ \
295 		/* fixture data is alloced, setup, and torn down per call. */ \
296 		FIXTURE_DATA(fixture_name) self; \
297 		memset(&self, 0, sizeof(FIXTURE_DATA(fixture_name))); \
298 		fixture_name##_setup(_metadata, &self); \
299 		/* Let setup failure terminate early. */ \
300 		if (!_metadata->passed) \
301 			return; \
302 		fixture_name##_##test_name(_metadata, &self); \
303 		fixture_name##_teardown(_metadata, &self); \
304 	} \
305 	static struct __test_metadata \
306 		      _##fixture_name##_##test_name##_object = { \
307 		name: #fixture_name "." #test_name, \
308 		fn: &wrapper_##fixture_name##_##test_name, \
309 		termsig: signal, \
310 	 }; \
311 	static void __attribute__((constructor)) \
312 			_register_##fixture_name##_##test_name(void) \
313 	{ \
314 		__register_test(&_##fixture_name##_##test_name##_object); \
315 	} \
316 	static void fixture_name##_##test_name( \
317 		struct __test_metadata __attribute__((unused)) *_metadata, \
318 		FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
319 
320 /**
321  * TEST_HARNESS_MAIN - Simple wrapper to run the test harness
322  *
323  * .. code-block:: c
324  *
325  *     TEST_HARNESS_MAIN
326  *
327  * Use once to append a main() to the test file.
328  */
329 #define TEST_HARNESS_MAIN \
330 	static void __attribute__((constructor)) \
331 	__constructor_order_last(void) \
332 	{ \
333 		if (!__constructor_order) \
334 			__constructor_order = _CONSTRUCTOR_ORDER_BACKWARD; \
335 	} \
336 	int main(int argc, char **argv) { \
337 		return test_harness_run(argc, argv); \
338 	}
339 
340 /**
341  * DOC: operators
342  *
343  * Operators for use in TEST() and TEST_F().
344  * ASSERT_* calls will stop test execution immediately.
345  * EXPECT_* calls will emit a failure warning, note it, and continue.
346  */
347 
348 /**
349  * ASSERT_EQ(expected, seen)
350  *
351  * @expected: expected value
352  * @seen: measured value
353  *
354  * ASSERT_EQ(expected, measured): expected == measured
355  */
356 #define ASSERT_EQ(expected, seen) \
357 	__EXPECT(expected, seen, ==, 1)
358 
359 /**
360  * ASSERT_NE(expected, seen)
361  *
362  * @expected: expected value
363  * @seen: measured value
364  *
365  * ASSERT_NE(expected, measured): expected != measured
366  */
367 #define ASSERT_NE(expected, seen) \
368 	__EXPECT(expected, seen, !=, 1)
369 
370 /**
371  * ASSERT_LT(expected, seen)
372  *
373  * @expected: expected value
374  * @seen: measured value
375  *
376  * ASSERT_LT(expected, measured): expected < measured
377  */
378 #define ASSERT_LT(expected, seen) \
379 	__EXPECT(expected, seen, <, 1)
380 
381 /**
382  * ASSERT_LE(expected, seen)
383  *
384  * @expected: expected value
385  * @seen: measured value
386  *
387  * ASSERT_LE(expected, measured): expected <= measured
388  */
389 #define ASSERT_LE(expected, seen) \
390 	__EXPECT(expected, seen, <=, 1)
391 
392 /**
393  * ASSERT_GT(expected, seen)
394  *
395  * @expected: expected value
396  * @seen: measured value
397  *
398  * ASSERT_GT(expected, measured): expected > measured
399  */
400 #define ASSERT_GT(expected, seen) \
401 	__EXPECT(expected, seen, >, 1)
402 
403 /**
404  * ASSERT_GE(expected, seen)
405  *
406  * @expected: expected value
407  * @seen: measured value
408  *
409  * ASSERT_GE(expected, measured): expected >= measured
410  */
411 #define ASSERT_GE(expected, seen) \
412 	__EXPECT(expected, seen, >=, 1)
413 
414 /**
415  * ASSERT_NULL(seen)
416  *
417  * @seen: measured value
418  *
419  * ASSERT_NULL(measured): NULL == measured
420  */
421 #define ASSERT_NULL(seen) \
422 	__EXPECT(NULL, seen, ==, 1)
423 
424 /**
425  * ASSERT_TRUE(seen)
426  *
427  * @seen: measured value
428  *
429  * ASSERT_TRUE(measured): measured != 0
430  */
431 #define ASSERT_TRUE(seen) \
432 	ASSERT_NE(0, seen)
433 
434 /**
435  * ASSERT_FALSE(seen)
436  *
437  * @seen: measured value
438  *
439  * ASSERT_FALSE(measured): measured == 0
440  */
441 #define ASSERT_FALSE(seen) \
442 	ASSERT_EQ(0, seen)
443 
444 /**
445  * ASSERT_STREQ(expected, seen)
446  *
447  * @expected: expected value
448  * @seen: measured value
449  *
450  * ASSERT_STREQ(expected, measured): !strcmp(expected, measured)
451  */
452 #define ASSERT_STREQ(expected, seen) \
453 	__EXPECT_STR(expected, seen, ==, 1)
454 
455 /**
456  * ASSERT_STRNE(expected, seen)
457  *
458  * @expected: expected value
459  * @seen: measured value
460  *
461  * ASSERT_STRNE(expected, measured): strcmp(expected, measured)
462  */
463 #define ASSERT_STRNE(expected, seen) \
464 	__EXPECT_STR(expected, seen, !=, 1)
465 
466 /**
467  * EXPECT_EQ(expected, seen)
468  *
469  * @expected: expected value
470  * @seen: measured value
471  *
472  * EXPECT_EQ(expected, measured): expected == measured
473  */
474 #define EXPECT_EQ(expected, seen) \
475 	__EXPECT(expected, seen, ==, 0)
476 
477 /**
478  * EXPECT_NE(expected, seen)
479  *
480  * @expected: expected value
481  * @seen: measured value
482  *
483  * EXPECT_NE(expected, measured): expected != measured
484  */
485 #define EXPECT_NE(expected, seen) \
486 	__EXPECT(expected, seen, !=, 0)
487 
488 /**
489  * EXPECT_LT(expected, seen)
490  *
491  * @expected: expected value
492  * @seen: measured value
493  *
494  * EXPECT_LT(expected, measured): expected < measured
495  */
496 #define EXPECT_LT(expected, seen) \
497 	__EXPECT(expected, seen, <, 0)
498 
499 /**
500  * EXPECT_LE(expected, seen)
501  *
502  * @expected: expected value
503  * @seen: measured value
504  *
505  * EXPECT_LE(expected, measured): expected <= measured
506  */
507 #define EXPECT_LE(expected, seen) \
508 	__EXPECT(expected, seen, <=, 0)
509 
510 /**
511  * EXPECT_GT(expected, seen)
512  *
513  * @expected: expected value
514  * @seen: measured value
515  *
516  * EXPECT_GT(expected, measured): expected > measured
517  */
518 #define EXPECT_GT(expected, seen) \
519 	__EXPECT(expected, seen, >, 0)
520 
521 /**
522  * EXPECT_GE(expected, seen)
523  *
524  * @expected: expected value
525  * @seen: measured value
526  *
527  * EXPECT_GE(expected, measured): expected >= measured
528  */
529 #define EXPECT_GE(expected, seen) \
530 	__EXPECT(expected, seen, >=, 0)
531 
532 /**
533  * EXPECT_NULL(seen)
534  *
535  * @seen: measured value
536  *
537  * EXPECT_NULL(measured): NULL == measured
538  */
539 #define EXPECT_NULL(seen) \
540 	__EXPECT(NULL, seen, ==, 0)
541 
542 /**
543  * EXPECT_TRUE(seen)
544  *
545  * @seen: measured value
546  *
547  * EXPECT_TRUE(measured): 0 != measured
548  */
549 #define EXPECT_TRUE(seen) \
550 	EXPECT_NE(0, seen)
551 
552 /**
553  * EXPECT_FALSE(seen)
554  *
555  * @seen: measured value
556  *
557  * EXPECT_FALSE(measured): 0 == measured
558  */
559 #define EXPECT_FALSE(seen) \
560 	EXPECT_EQ(0, seen)
561 
562 /**
563  * EXPECT_STREQ(expected, seen)
564  *
565  * @expected: expected value
566  * @seen: measured value
567  *
568  * EXPECT_STREQ(expected, measured): !strcmp(expected, measured)
569  */
570 #define EXPECT_STREQ(expected, seen) \
571 	__EXPECT_STR(expected, seen, ==, 0)
572 
573 /**
574  * EXPECT_STRNE(expected, seen)
575  *
576  * @expected: expected value
577  * @seen: measured value
578  *
579  * EXPECT_STRNE(expected, measured): strcmp(expected, measured)
580  */
581 #define EXPECT_STRNE(expected, seen) \
582 	__EXPECT_STR(expected, seen, !=, 0)
583 
584 #define ARRAY_SIZE(a)	(sizeof(a) / sizeof(a[0]))
585 
586 /* Support an optional handler after and ASSERT_* or EXPECT_*.  The approach is
587  * not thread-safe, but it should be fine in most sane test scenarios.
588  *
589  * Using __bail(), which optionally abort()s, is the easiest way to early
590  * return while still providing an optional block to the API consumer.
591  */
592 #define OPTIONAL_HANDLER(_assert) \
593 	for (; _metadata->trigger; _metadata->trigger = \
594 			__bail(_assert, _metadata->no_print, _metadata->step))
595 
596 #define __INC_STEP(_metadata) \
597 	if (_metadata->passed && _metadata->step < 255) \
598 		_metadata->step++;
599 
600 #define __EXPECT(_expected, _seen, _t, _assert) do { \
601 	/* Avoid multiple evaluation of the cases */ \
602 	__typeof__(_expected) __exp = (_expected); \
603 	__typeof__(_seen) __seen = (_seen); \
604 	if (_assert) __INC_STEP(_metadata); \
605 	if (!(__exp _t __seen)) { \
606 		unsigned long long __exp_print = (uintptr_t)__exp; \
607 		unsigned long long __seen_print = (uintptr_t)__seen; \
608 		__TH_LOG("Expected %s (%llu) %s %s (%llu)", \
609 			 #_expected, __exp_print, #_t, \
610 			 #_seen, __seen_print); \
611 		_metadata->passed = 0; \
612 		/* Ensure the optional handler is triggered */ \
613 		_metadata->trigger = 1; \
614 	} \
615 } while (0); OPTIONAL_HANDLER(_assert)
616 
617 #define __EXPECT_STR(_expected, _seen, _t, _assert) do { \
618 	const char *__exp = (_expected); \
619 	const char *__seen = (_seen); \
620 	if (_assert) __INC_STEP(_metadata); \
621 	if (!(strcmp(__exp, __seen) _t 0))  { \
622 		__TH_LOG("Expected '%s' %s '%s'.", __exp, #_t, __seen); \
623 		_metadata->passed = 0; \
624 		_metadata->trigger = 1; \
625 	} \
626 } while (0); OPTIONAL_HANDLER(_assert)
627 
628 /* Contains all the information for test execution and status checking. */
629 struct __test_metadata {
630 	const char *name;
631 	void (*fn)(struct __test_metadata *);
632 	int termsig;
633 	int passed;
634 	int trigger; /* extra handler after the evaluation */
635 	__u8 step;
636 	bool no_print; /* manual trigger when TH_LOG_STREAM is not available */
637 	struct __test_metadata *prev, *next;
638 };
639 
640 /* Storage for the (global) tests to be run. */
641 static struct __test_metadata *__test_list;
642 static unsigned int __test_count;
643 static unsigned int __fixture_count;
644 static int __constructor_order;
645 
646 #define _CONSTRUCTOR_ORDER_FORWARD   1
647 #define _CONSTRUCTOR_ORDER_BACKWARD -1
648 
649 /*
650  * Since constructors are called in reverse order, reverse the test
651  * list so tests are run in source declaration order.
652  * https://gcc.gnu.org/onlinedocs/gccint/Initialization.html
653  * However, it seems not all toolchains do this correctly, so use
654  * __constructor_order to detect which direction is called first
655  * and adjust list building logic to get things running in the right
656  * direction.
657  */
658 static inline void __register_test(struct __test_metadata *t)
659 {
660 	__test_count++;
661 	/* Circular linked list where only prev is circular. */
662 	if (__test_list == NULL) {
663 		__test_list = t;
664 		t->next = NULL;
665 		t->prev = t;
666 		return;
667 	}
668 	if (__constructor_order == _CONSTRUCTOR_ORDER_FORWARD) {
669 		t->next = NULL;
670 		t->prev = __test_list->prev;
671 		t->prev->next = t;
672 		__test_list->prev = t;
673 	} else {
674 		t->next = __test_list;
675 		t->next->prev = t;
676 		t->prev = t;
677 		__test_list = t;
678 	}
679 }
680 
681 static inline int __bail(int for_realz, bool no_print, __u8 step)
682 {
683 	if (for_realz) {
684 		if (no_print)
685 			_exit(step);
686 		abort();
687 	}
688 	return 0;
689 }
690 
691 void __run_test(struct __test_metadata *t)
692 {
693 	pid_t child_pid;
694 	int status;
695 
696 	t->passed = 1;
697 	t->trigger = 0;
698 	printf("[ RUN      ] %s\n", t->name);
699 	child_pid = fork();
700 	if (child_pid < 0) {
701 		printf("ERROR SPAWNING TEST CHILD\n");
702 		t->passed = 0;
703 	} else if (child_pid == 0) {
704 		t->fn(t);
705 		/* return the step that failed or 0 */
706 		_exit(t->passed ? 0 : t->step);
707 	} else {
708 		/* TODO(wad) add timeout support. */
709 		waitpid(child_pid, &status, 0);
710 		if (WIFEXITED(status)) {
711 			t->passed = t->termsig == -1 ? !WEXITSTATUS(status) : 0;
712 			if (t->termsig != -1) {
713 				fprintf(TH_LOG_STREAM,
714 					"%s: Test exited normally "
715 					"instead of by signal (code: %d)\n",
716 					t->name,
717 					WEXITSTATUS(status));
718 			} else if (!t->passed) {
719 				fprintf(TH_LOG_STREAM,
720 					"%s: Test failed at step #%d\n",
721 					t->name,
722 					WEXITSTATUS(status));
723 			}
724 		} else if (WIFSIGNALED(status)) {
725 			t->passed = 0;
726 			if (WTERMSIG(status) == SIGABRT) {
727 				fprintf(TH_LOG_STREAM,
728 					"%s: Test terminated by assertion\n",
729 					t->name);
730 			} else if (WTERMSIG(status) == t->termsig) {
731 				t->passed = 1;
732 			} else {
733 				fprintf(TH_LOG_STREAM,
734 					"%s: Test terminated unexpectedly "
735 					"by signal %d\n",
736 					t->name,
737 					WTERMSIG(status));
738 			}
739 		} else {
740 			fprintf(TH_LOG_STREAM,
741 				"%s: Test ended in some other way [%u]\n",
742 				t->name,
743 				status);
744 		}
745 	}
746 	printf("[     %4s ] %s\n", (t->passed ? "OK" : "FAIL"), t->name);
747 }
748 
749 static int test_harness_run(int __attribute__((unused)) argc,
750 			    char __attribute__((unused)) **argv)
751 {
752 	struct __test_metadata *t;
753 	int ret = 0;
754 	unsigned int count = 0;
755 	unsigned int pass_count = 0;
756 
757 	/* TODO(wad) add optional arguments similar to gtest. */
758 	printf("[==========] Running %u tests from %u test cases.\n",
759 	       __test_count, __fixture_count + 1);
760 	for (t = __test_list; t; t = t->next) {
761 		count++;
762 		__run_test(t);
763 		if (t->passed)
764 			pass_count++;
765 		else
766 			ret = 1;
767 	}
768 	printf("[==========] %u / %u tests passed.\n", pass_count, count);
769 	printf("[  %s  ]\n", (ret ? "FAILED" : "PASSED"));
770 	return ret;
771 }
772 
773 static void __attribute__((constructor)) __constructor_order_first(void)
774 {
775 	if (!__constructor_order)
776 		__constructor_order = _CONSTRUCTOR_ORDER_FORWARD;
777 }
778 
779 #endif  /* __KSELFTEST_HARNESS_H */
780