Commit | Line | Data |
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cae2ed9a IM |
1 | /* |
2 | * lib/locking-selftest.c | |
3 | * | |
4 | * Testsuite for various locking APIs: spinlocks, rwlocks, | |
5 | * mutexes and rw-semaphores. | |
6 | * | |
7 | * It is checking both false positives and false negatives. | |
8 | * | |
9 | * Started by Ingo Molnar: | |
10 | * | |
11 | * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> | |
12 | */ | |
13 | #include <linux/rwsem.h> | |
14 | #include <linux/mutex.h> | |
1b375dc3 | 15 | #include <linux/ww_mutex.h> |
cae2ed9a IM |
16 | #include <linux/sched.h> |
17 | #include <linux/delay.h> | |
fbb9ce95 | 18 | #include <linux/lockdep.h> |
cae2ed9a IM |
19 | #include <linux/spinlock.h> |
20 | #include <linux/kallsyms.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/debug_locks.h> | |
23 | #include <linux/irqflags.h> | |
24 | ||
25 | /* | |
26 | * Change this to 1 if you want to see the failure printouts: | |
27 | */ | |
28 | static unsigned int debug_locks_verbose; | |
29 | ||
1de99445 ML |
30 | static DEFINE_WW_CLASS(ww_lockdep); |
31 | ||
cae2ed9a IM |
32 | static int __init setup_debug_locks_verbose(char *str) |
33 | { | |
34 | get_option(&str, &debug_locks_verbose); | |
35 | ||
36 | return 1; | |
37 | } | |
38 | ||
39 | __setup("debug_locks_verbose=", setup_debug_locks_verbose); | |
40 | ||
41 | #define FAILURE 0 | |
42 | #define SUCCESS 1 | |
43 | ||
44 | #define LOCKTYPE_SPIN 0x1 | |
45 | #define LOCKTYPE_RWLOCK 0x2 | |
46 | #define LOCKTYPE_MUTEX 0x4 | |
47 | #define LOCKTYPE_RWSEM 0x8 | |
1de99445 ML |
48 | #define LOCKTYPE_WW 0x10 |
49 | ||
50 | static struct ww_acquire_ctx t, t2; | |
f3cf139e | 51 | static struct ww_mutex o, o2, o3; |
cae2ed9a IM |
52 | |
53 | /* | |
54 | * Normal standalone locks, for the circular and irq-context | |
55 | * dependency tests: | |
56 | */ | |
9fb1b90c YZ |
57 | static DEFINE_RAW_SPINLOCK(lock_A); |
58 | static DEFINE_RAW_SPINLOCK(lock_B); | |
59 | static DEFINE_RAW_SPINLOCK(lock_C); | |
60 | static DEFINE_RAW_SPINLOCK(lock_D); | |
cae2ed9a IM |
61 | |
62 | static DEFINE_RWLOCK(rwlock_A); | |
63 | static DEFINE_RWLOCK(rwlock_B); | |
64 | static DEFINE_RWLOCK(rwlock_C); | |
65 | static DEFINE_RWLOCK(rwlock_D); | |
66 | ||
67 | static DEFINE_MUTEX(mutex_A); | |
68 | static DEFINE_MUTEX(mutex_B); | |
69 | static DEFINE_MUTEX(mutex_C); | |
70 | static DEFINE_MUTEX(mutex_D); | |
71 | ||
72 | static DECLARE_RWSEM(rwsem_A); | |
73 | static DECLARE_RWSEM(rwsem_B); | |
74 | static DECLARE_RWSEM(rwsem_C); | |
75 | static DECLARE_RWSEM(rwsem_D); | |
76 | ||
77 | /* | |
78 | * Locks that we initialize dynamically as well so that | |
79 | * e.g. X1 and X2 becomes two instances of the same class, | |
80 | * but X* and Y* are different classes. We do this so that | |
81 | * we do not trigger a real lockup: | |
82 | */ | |
9fb1b90c YZ |
83 | static DEFINE_RAW_SPINLOCK(lock_X1); |
84 | static DEFINE_RAW_SPINLOCK(lock_X2); | |
85 | static DEFINE_RAW_SPINLOCK(lock_Y1); | |
86 | static DEFINE_RAW_SPINLOCK(lock_Y2); | |
87 | static DEFINE_RAW_SPINLOCK(lock_Z1); | |
88 | static DEFINE_RAW_SPINLOCK(lock_Z2); | |
cae2ed9a IM |
89 | |
90 | static DEFINE_RWLOCK(rwlock_X1); | |
91 | static DEFINE_RWLOCK(rwlock_X2); | |
92 | static DEFINE_RWLOCK(rwlock_Y1); | |
93 | static DEFINE_RWLOCK(rwlock_Y2); | |
94 | static DEFINE_RWLOCK(rwlock_Z1); | |
95 | static DEFINE_RWLOCK(rwlock_Z2); | |
96 | ||
97 | static DEFINE_MUTEX(mutex_X1); | |
98 | static DEFINE_MUTEX(mutex_X2); | |
99 | static DEFINE_MUTEX(mutex_Y1); | |
100 | static DEFINE_MUTEX(mutex_Y2); | |
101 | static DEFINE_MUTEX(mutex_Z1); | |
102 | static DEFINE_MUTEX(mutex_Z2); | |
103 | ||
104 | static DECLARE_RWSEM(rwsem_X1); | |
105 | static DECLARE_RWSEM(rwsem_X2); | |
106 | static DECLARE_RWSEM(rwsem_Y1); | |
107 | static DECLARE_RWSEM(rwsem_Y2); | |
108 | static DECLARE_RWSEM(rwsem_Z1); | |
109 | static DECLARE_RWSEM(rwsem_Z2); | |
110 | ||
111 | /* | |
112 | * non-inlined runtime initializers, to let separate locks share | |
113 | * the same lock-class: | |
114 | */ | |
115 | #define INIT_CLASS_FUNC(class) \ | |
116 | static noinline void \ | |
9fb1b90c YZ |
117 | init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \ |
118 | struct mutex *mutex, struct rw_semaphore *rwsem)\ | |
cae2ed9a | 119 | { \ |
9fb1b90c | 120 | raw_spin_lock_init(lock); \ |
cae2ed9a IM |
121 | rwlock_init(rwlock); \ |
122 | mutex_init(mutex); \ | |
123 | init_rwsem(rwsem); \ | |
124 | } | |
125 | ||
126 | INIT_CLASS_FUNC(X) | |
127 | INIT_CLASS_FUNC(Y) | |
128 | INIT_CLASS_FUNC(Z) | |
129 | ||
130 | static void init_shared_classes(void) | |
131 | { | |
132 | init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1); | |
133 | init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2); | |
134 | ||
135 | init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1); | |
136 | init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2); | |
137 | ||
138 | init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1); | |
139 | init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2); | |
140 | } | |
141 | ||
142 | /* | |
143 | * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests. | |
144 | * The following functions use a lock from a simulated hardirq/softirq | |
145 | * context, causing the locks to be marked as hardirq-safe/softirq-safe: | |
146 | */ | |
147 | ||
148 | #define HARDIRQ_DISABLE local_irq_disable | |
149 | #define HARDIRQ_ENABLE local_irq_enable | |
150 | ||
151 | #define HARDIRQ_ENTER() \ | |
152 | local_irq_disable(); \ | |
ba9f207c | 153 | __irq_enter(); \ |
cae2ed9a IM |
154 | WARN_ON(!in_irq()); |
155 | ||
156 | #define HARDIRQ_EXIT() \ | |
157 | __irq_exit(); \ | |
158 | local_irq_enable(); | |
159 | ||
160 | #define SOFTIRQ_DISABLE local_bh_disable | |
161 | #define SOFTIRQ_ENABLE local_bh_enable | |
162 | ||
163 | #define SOFTIRQ_ENTER() \ | |
164 | local_bh_disable(); \ | |
165 | local_irq_disable(); \ | |
d820ac4c | 166 | lockdep_softirq_enter(); \ |
cae2ed9a IM |
167 | WARN_ON(!in_softirq()); |
168 | ||
169 | #define SOFTIRQ_EXIT() \ | |
d820ac4c | 170 | lockdep_softirq_exit(); \ |
cae2ed9a IM |
171 | local_irq_enable(); \ |
172 | local_bh_enable(); | |
173 | ||
174 | /* | |
175 | * Shortcuts for lock/unlock API variants, to keep | |
176 | * the testcases compact: | |
177 | */ | |
9fb1b90c YZ |
178 | #define L(x) raw_spin_lock(&lock_##x) |
179 | #define U(x) raw_spin_unlock(&lock_##x) | |
cae2ed9a | 180 | #define LU(x) L(x); U(x) |
9fb1b90c | 181 | #define SI(x) raw_spin_lock_init(&lock_##x) |
cae2ed9a IM |
182 | |
183 | #define WL(x) write_lock(&rwlock_##x) | |
184 | #define WU(x) write_unlock(&rwlock_##x) | |
185 | #define WLU(x) WL(x); WU(x) | |
186 | ||
187 | #define RL(x) read_lock(&rwlock_##x) | |
188 | #define RU(x) read_unlock(&rwlock_##x) | |
189 | #define RLU(x) RL(x); RU(x) | |
190 | #define RWI(x) rwlock_init(&rwlock_##x) | |
191 | ||
192 | #define ML(x) mutex_lock(&mutex_##x) | |
193 | #define MU(x) mutex_unlock(&mutex_##x) | |
194 | #define MI(x) mutex_init(&mutex_##x) | |
195 | ||
196 | #define WSL(x) down_write(&rwsem_##x) | |
197 | #define WSU(x) up_write(&rwsem_##x) | |
198 | ||
199 | #define RSL(x) down_read(&rwsem_##x) | |
200 | #define RSU(x) up_read(&rwsem_##x) | |
201 | #define RWSI(x) init_rwsem(&rwsem_##x) | |
202 | ||
1de99445 ML |
203 | #ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH |
204 | #define WWAI(x) ww_acquire_init(x, &ww_lockdep) | |
205 | #else | |
206 | #define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0) | |
207 | #endif | |
208 | #define WWAD(x) ww_acquire_done(x) | |
209 | #define WWAF(x) ww_acquire_fini(x) | |
210 | ||
211 | #define WWL(x, c) ww_mutex_lock(x, c) | |
212 | #define WWT(x) ww_mutex_trylock(x) | |
213 | #define WWL1(x) ww_mutex_lock(x, NULL) | |
214 | #define WWU(x) ww_mutex_unlock(x) | |
215 | ||
216 | ||
cae2ed9a IM |
217 | #define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x) |
218 | ||
219 | /* | |
220 | * Generate different permutations of the same testcase, using | |
221 | * the same basic lock-dependency/state events: | |
222 | */ | |
223 | ||
224 | #define GENERATE_TESTCASE(name) \ | |
225 | \ | |
226 | static void name(void) { E(); } | |
227 | ||
228 | #define GENERATE_PERMUTATIONS_2_EVENTS(name) \ | |
229 | \ | |
230 | static void name##_12(void) { E1(); E2(); } \ | |
231 | static void name##_21(void) { E2(); E1(); } | |
232 | ||
233 | #define GENERATE_PERMUTATIONS_3_EVENTS(name) \ | |
234 | \ | |
235 | static void name##_123(void) { E1(); E2(); E3(); } \ | |
236 | static void name##_132(void) { E1(); E3(); E2(); } \ | |
237 | static void name##_213(void) { E2(); E1(); E3(); } \ | |
238 | static void name##_231(void) { E2(); E3(); E1(); } \ | |
239 | static void name##_312(void) { E3(); E1(); E2(); } \ | |
240 | static void name##_321(void) { E3(); E2(); E1(); } | |
241 | ||
242 | /* | |
243 | * AA deadlock: | |
244 | */ | |
245 | ||
246 | #define E() \ | |
247 | \ | |
248 | LOCK(X1); \ | |
249 | LOCK(X2); /* this one should fail */ | |
250 | ||
251 | /* | |
252 | * 6 testcases: | |
253 | */ | |
254 | #include "locking-selftest-spin.h" | |
255 | GENERATE_TESTCASE(AA_spin) | |
256 | #include "locking-selftest-wlock.h" | |
257 | GENERATE_TESTCASE(AA_wlock) | |
258 | #include "locking-selftest-rlock.h" | |
259 | GENERATE_TESTCASE(AA_rlock) | |
260 | #include "locking-selftest-mutex.h" | |
261 | GENERATE_TESTCASE(AA_mutex) | |
262 | #include "locking-selftest-wsem.h" | |
263 | GENERATE_TESTCASE(AA_wsem) | |
264 | #include "locking-selftest-rsem.h" | |
265 | GENERATE_TESTCASE(AA_rsem) | |
266 | ||
267 | #undef E | |
268 | ||
269 | /* | |
270 | * Special-case for read-locking, they are | |
6c9076ec | 271 | * allowed to recurse on the same lock class: |
cae2ed9a IM |
272 | */ |
273 | static void rlock_AA1(void) | |
274 | { | |
275 | RL(X1); | |
276 | RL(X1); // this one should NOT fail | |
277 | } | |
278 | ||
279 | static void rlock_AA1B(void) | |
280 | { | |
281 | RL(X1); | |
6c9076ec | 282 | RL(X2); // this one should NOT fail |
cae2ed9a IM |
283 | } |
284 | ||
285 | static void rsem_AA1(void) | |
286 | { | |
287 | RSL(X1); | |
288 | RSL(X1); // this one should fail | |
289 | } | |
290 | ||
291 | static void rsem_AA1B(void) | |
292 | { | |
293 | RSL(X1); | |
294 | RSL(X2); // this one should fail | |
295 | } | |
296 | /* | |
297 | * The mixing of read and write locks is not allowed: | |
298 | */ | |
299 | static void rlock_AA2(void) | |
300 | { | |
301 | RL(X1); | |
302 | WL(X2); // this one should fail | |
303 | } | |
304 | ||
305 | static void rsem_AA2(void) | |
306 | { | |
307 | RSL(X1); | |
308 | WSL(X2); // this one should fail | |
309 | } | |
310 | ||
311 | static void rlock_AA3(void) | |
312 | { | |
313 | WL(X1); | |
314 | RL(X2); // this one should fail | |
315 | } | |
316 | ||
317 | static void rsem_AA3(void) | |
318 | { | |
319 | WSL(X1); | |
320 | RSL(X2); // this one should fail | |
321 | } | |
322 | ||
323 | /* | |
324 | * ABBA deadlock: | |
325 | */ | |
326 | ||
327 | #define E() \ | |
328 | \ | |
329 | LOCK_UNLOCK_2(A, B); \ | |
330 | LOCK_UNLOCK_2(B, A); /* fail */ | |
331 | ||
332 | /* | |
333 | * 6 testcases: | |
334 | */ | |
335 | #include "locking-selftest-spin.h" | |
336 | GENERATE_TESTCASE(ABBA_spin) | |
337 | #include "locking-selftest-wlock.h" | |
338 | GENERATE_TESTCASE(ABBA_wlock) | |
339 | #include "locking-selftest-rlock.h" | |
340 | GENERATE_TESTCASE(ABBA_rlock) | |
341 | #include "locking-selftest-mutex.h" | |
342 | GENERATE_TESTCASE(ABBA_mutex) | |
343 | #include "locking-selftest-wsem.h" | |
344 | GENERATE_TESTCASE(ABBA_wsem) | |
345 | #include "locking-selftest-rsem.h" | |
346 | GENERATE_TESTCASE(ABBA_rsem) | |
347 | ||
348 | #undef E | |
349 | ||
350 | /* | |
351 | * AB BC CA deadlock: | |
352 | */ | |
353 | ||
354 | #define E() \ | |
355 | \ | |
356 | LOCK_UNLOCK_2(A, B); \ | |
357 | LOCK_UNLOCK_2(B, C); \ | |
358 | LOCK_UNLOCK_2(C, A); /* fail */ | |
359 | ||
360 | /* | |
361 | * 6 testcases: | |
362 | */ | |
363 | #include "locking-selftest-spin.h" | |
364 | GENERATE_TESTCASE(ABBCCA_spin) | |
365 | #include "locking-selftest-wlock.h" | |
366 | GENERATE_TESTCASE(ABBCCA_wlock) | |
367 | #include "locking-selftest-rlock.h" | |
368 | GENERATE_TESTCASE(ABBCCA_rlock) | |
369 | #include "locking-selftest-mutex.h" | |
370 | GENERATE_TESTCASE(ABBCCA_mutex) | |
371 | #include "locking-selftest-wsem.h" | |
372 | GENERATE_TESTCASE(ABBCCA_wsem) | |
373 | #include "locking-selftest-rsem.h" | |
374 | GENERATE_TESTCASE(ABBCCA_rsem) | |
375 | ||
376 | #undef E | |
377 | ||
378 | /* | |
379 | * AB CA BC deadlock: | |
380 | */ | |
381 | ||
382 | #define E() \ | |
383 | \ | |
384 | LOCK_UNLOCK_2(A, B); \ | |
385 | LOCK_UNLOCK_2(C, A); \ | |
386 | LOCK_UNLOCK_2(B, C); /* fail */ | |
387 | ||
388 | /* | |
389 | * 6 testcases: | |
390 | */ | |
391 | #include "locking-selftest-spin.h" | |
392 | GENERATE_TESTCASE(ABCABC_spin) | |
393 | #include "locking-selftest-wlock.h" | |
394 | GENERATE_TESTCASE(ABCABC_wlock) | |
395 | #include "locking-selftest-rlock.h" | |
396 | GENERATE_TESTCASE(ABCABC_rlock) | |
397 | #include "locking-selftest-mutex.h" | |
398 | GENERATE_TESTCASE(ABCABC_mutex) | |
399 | #include "locking-selftest-wsem.h" | |
400 | GENERATE_TESTCASE(ABCABC_wsem) | |
401 | #include "locking-selftest-rsem.h" | |
402 | GENERATE_TESTCASE(ABCABC_rsem) | |
403 | ||
404 | #undef E | |
405 | ||
406 | /* | |
407 | * AB BC CD DA deadlock: | |
408 | */ | |
409 | ||
410 | #define E() \ | |
411 | \ | |
412 | LOCK_UNLOCK_2(A, B); \ | |
413 | LOCK_UNLOCK_2(B, C); \ | |
414 | LOCK_UNLOCK_2(C, D); \ | |
415 | LOCK_UNLOCK_2(D, A); /* fail */ | |
416 | ||
417 | /* | |
418 | * 6 testcases: | |
419 | */ | |
420 | #include "locking-selftest-spin.h" | |
421 | GENERATE_TESTCASE(ABBCCDDA_spin) | |
422 | #include "locking-selftest-wlock.h" | |
423 | GENERATE_TESTCASE(ABBCCDDA_wlock) | |
424 | #include "locking-selftest-rlock.h" | |
425 | GENERATE_TESTCASE(ABBCCDDA_rlock) | |
426 | #include "locking-selftest-mutex.h" | |
427 | GENERATE_TESTCASE(ABBCCDDA_mutex) | |
428 | #include "locking-selftest-wsem.h" | |
429 | GENERATE_TESTCASE(ABBCCDDA_wsem) | |
430 | #include "locking-selftest-rsem.h" | |
431 | GENERATE_TESTCASE(ABBCCDDA_rsem) | |
432 | ||
433 | #undef E | |
434 | ||
435 | /* | |
436 | * AB CD BD DA deadlock: | |
437 | */ | |
438 | #define E() \ | |
439 | \ | |
440 | LOCK_UNLOCK_2(A, B); \ | |
441 | LOCK_UNLOCK_2(C, D); \ | |
442 | LOCK_UNLOCK_2(B, D); \ | |
443 | LOCK_UNLOCK_2(D, A); /* fail */ | |
444 | ||
445 | /* | |
446 | * 6 testcases: | |
447 | */ | |
448 | #include "locking-selftest-spin.h" | |
449 | GENERATE_TESTCASE(ABCDBDDA_spin) | |
450 | #include "locking-selftest-wlock.h" | |
451 | GENERATE_TESTCASE(ABCDBDDA_wlock) | |
452 | #include "locking-selftest-rlock.h" | |
453 | GENERATE_TESTCASE(ABCDBDDA_rlock) | |
454 | #include "locking-selftest-mutex.h" | |
455 | GENERATE_TESTCASE(ABCDBDDA_mutex) | |
456 | #include "locking-selftest-wsem.h" | |
457 | GENERATE_TESTCASE(ABCDBDDA_wsem) | |
458 | #include "locking-selftest-rsem.h" | |
459 | GENERATE_TESTCASE(ABCDBDDA_rsem) | |
460 | ||
461 | #undef E | |
462 | ||
463 | /* | |
464 | * AB CD BC DA deadlock: | |
465 | */ | |
466 | #define E() \ | |
467 | \ | |
468 | LOCK_UNLOCK_2(A, B); \ | |
469 | LOCK_UNLOCK_2(C, D); \ | |
470 | LOCK_UNLOCK_2(B, C); \ | |
471 | LOCK_UNLOCK_2(D, A); /* fail */ | |
472 | ||
473 | /* | |
474 | * 6 testcases: | |
475 | */ | |
476 | #include "locking-selftest-spin.h" | |
477 | GENERATE_TESTCASE(ABCDBCDA_spin) | |
478 | #include "locking-selftest-wlock.h" | |
479 | GENERATE_TESTCASE(ABCDBCDA_wlock) | |
480 | #include "locking-selftest-rlock.h" | |
481 | GENERATE_TESTCASE(ABCDBCDA_rlock) | |
482 | #include "locking-selftest-mutex.h" | |
483 | GENERATE_TESTCASE(ABCDBCDA_mutex) | |
484 | #include "locking-selftest-wsem.h" | |
485 | GENERATE_TESTCASE(ABCDBCDA_wsem) | |
486 | #include "locking-selftest-rsem.h" | |
487 | GENERATE_TESTCASE(ABCDBCDA_rsem) | |
488 | ||
489 | #undef E | |
490 | ||
491 | /* | |
492 | * Double unlock: | |
493 | */ | |
494 | #define E() \ | |
495 | \ | |
496 | LOCK(A); \ | |
497 | UNLOCK(A); \ | |
498 | UNLOCK(A); /* fail */ | |
499 | ||
500 | /* | |
501 | * 6 testcases: | |
502 | */ | |
503 | #include "locking-selftest-spin.h" | |
504 | GENERATE_TESTCASE(double_unlock_spin) | |
505 | #include "locking-selftest-wlock.h" | |
506 | GENERATE_TESTCASE(double_unlock_wlock) | |
507 | #include "locking-selftest-rlock.h" | |
508 | GENERATE_TESTCASE(double_unlock_rlock) | |
509 | #include "locking-selftest-mutex.h" | |
510 | GENERATE_TESTCASE(double_unlock_mutex) | |
511 | #include "locking-selftest-wsem.h" | |
512 | GENERATE_TESTCASE(double_unlock_wsem) | |
513 | #include "locking-selftest-rsem.h" | |
514 | GENERATE_TESTCASE(double_unlock_rsem) | |
515 | ||
516 | #undef E | |
517 | ||
518 | /* | |
519 | * Bad unlock ordering: | |
520 | */ | |
521 | #define E() \ | |
522 | \ | |
523 | LOCK(A); \ | |
524 | LOCK(B); \ | |
525 | UNLOCK(A); /* fail */ \ | |
526 | UNLOCK(B); | |
527 | ||
528 | /* | |
529 | * 6 testcases: | |
530 | */ | |
531 | #include "locking-selftest-spin.h" | |
532 | GENERATE_TESTCASE(bad_unlock_order_spin) | |
533 | #include "locking-selftest-wlock.h" | |
534 | GENERATE_TESTCASE(bad_unlock_order_wlock) | |
535 | #include "locking-selftest-rlock.h" | |
536 | GENERATE_TESTCASE(bad_unlock_order_rlock) | |
537 | #include "locking-selftest-mutex.h" | |
538 | GENERATE_TESTCASE(bad_unlock_order_mutex) | |
539 | #include "locking-selftest-wsem.h" | |
540 | GENERATE_TESTCASE(bad_unlock_order_wsem) | |
541 | #include "locking-selftest-rsem.h" | |
542 | GENERATE_TESTCASE(bad_unlock_order_rsem) | |
543 | ||
544 | #undef E | |
545 | ||
546 | /* | |
547 | * initializing a held lock: | |
548 | */ | |
549 | #define E() \ | |
550 | \ | |
551 | LOCK(A); \ | |
552 | INIT(A); /* fail */ | |
553 | ||
554 | /* | |
555 | * 6 testcases: | |
556 | */ | |
557 | #include "locking-selftest-spin.h" | |
558 | GENERATE_TESTCASE(init_held_spin) | |
559 | #include "locking-selftest-wlock.h" | |
560 | GENERATE_TESTCASE(init_held_wlock) | |
561 | #include "locking-selftest-rlock.h" | |
562 | GENERATE_TESTCASE(init_held_rlock) | |
563 | #include "locking-selftest-mutex.h" | |
564 | GENERATE_TESTCASE(init_held_mutex) | |
565 | #include "locking-selftest-wsem.h" | |
566 | GENERATE_TESTCASE(init_held_wsem) | |
567 | #include "locking-selftest-rsem.h" | |
568 | GENERATE_TESTCASE(init_held_rsem) | |
569 | ||
570 | #undef E | |
571 | ||
572 | /* | |
573 | * locking an irq-safe lock with irqs enabled: | |
574 | */ | |
575 | #define E1() \ | |
576 | \ | |
577 | IRQ_ENTER(); \ | |
578 | LOCK(A); \ | |
579 | UNLOCK(A); \ | |
580 | IRQ_EXIT(); | |
581 | ||
582 | #define E2() \ | |
583 | \ | |
584 | LOCK(A); \ | |
585 | UNLOCK(A); | |
586 | ||
587 | /* | |
588 | * Generate 24 testcases: | |
589 | */ | |
590 | #include "locking-selftest-spin-hardirq.h" | |
591 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) | |
592 | ||
593 | #include "locking-selftest-rlock-hardirq.h" | |
594 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) | |
595 | ||
596 | #include "locking-selftest-wlock-hardirq.h" | |
597 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock) | |
598 | ||
599 | #include "locking-selftest-spin-softirq.h" | |
600 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin) | |
601 | ||
602 | #include "locking-selftest-rlock-softirq.h" | |
603 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) | |
604 | ||
605 | #include "locking-selftest-wlock-softirq.h" | |
606 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) | |
607 | ||
608 | #undef E1 | |
609 | #undef E2 | |
610 | ||
611 | /* | |
612 | * Enabling hardirqs with a softirq-safe lock held: | |
613 | */ | |
614 | #define E1() \ | |
615 | \ | |
616 | SOFTIRQ_ENTER(); \ | |
617 | LOCK(A); \ | |
618 | UNLOCK(A); \ | |
619 | SOFTIRQ_EXIT(); | |
620 | ||
621 | #define E2() \ | |
622 | \ | |
623 | HARDIRQ_DISABLE(); \ | |
624 | LOCK(A); \ | |
625 | HARDIRQ_ENABLE(); \ | |
626 | UNLOCK(A); | |
627 | ||
628 | /* | |
629 | * Generate 12 testcases: | |
630 | */ | |
631 | #include "locking-selftest-spin.h" | |
632 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin) | |
633 | ||
634 | #include "locking-selftest-wlock.h" | |
635 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock) | |
636 | ||
637 | #include "locking-selftest-rlock.h" | |
638 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) | |
639 | ||
640 | #undef E1 | |
641 | #undef E2 | |
642 | ||
643 | /* | |
644 | * Enabling irqs with an irq-safe lock held: | |
645 | */ | |
646 | #define E1() \ | |
647 | \ | |
648 | IRQ_ENTER(); \ | |
649 | LOCK(A); \ | |
650 | UNLOCK(A); \ | |
651 | IRQ_EXIT(); | |
652 | ||
653 | #define E2() \ | |
654 | \ | |
655 | IRQ_DISABLE(); \ | |
656 | LOCK(A); \ | |
657 | IRQ_ENABLE(); \ | |
658 | UNLOCK(A); | |
659 | ||
660 | /* | |
661 | * Generate 24 testcases: | |
662 | */ | |
663 | #include "locking-selftest-spin-hardirq.h" | |
664 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) | |
665 | ||
666 | #include "locking-selftest-rlock-hardirq.h" | |
667 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) | |
668 | ||
669 | #include "locking-selftest-wlock-hardirq.h" | |
670 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock) | |
671 | ||
672 | #include "locking-selftest-spin-softirq.h" | |
673 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin) | |
674 | ||
675 | #include "locking-selftest-rlock-softirq.h" | |
676 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) | |
677 | ||
678 | #include "locking-selftest-wlock-softirq.h" | |
679 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) | |
680 | ||
681 | #undef E1 | |
682 | #undef E2 | |
683 | ||
684 | /* | |
685 | * Acquiring a irq-unsafe lock while holding an irq-safe-lock: | |
686 | */ | |
687 | #define E1() \ | |
688 | \ | |
689 | LOCK(A); \ | |
690 | LOCK(B); \ | |
691 | UNLOCK(B); \ | |
692 | UNLOCK(A); \ | |
693 | ||
694 | #define E2() \ | |
695 | \ | |
696 | LOCK(B); \ | |
697 | UNLOCK(B); | |
698 | ||
699 | #define E3() \ | |
700 | \ | |
701 | IRQ_ENTER(); \ | |
702 | LOCK(A); \ | |
703 | UNLOCK(A); \ | |
704 | IRQ_EXIT(); | |
705 | ||
706 | /* | |
707 | * Generate 36 testcases: | |
708 | */ | |
709 | #include "locking-selftest-spin-hardirq.h" | |
710 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) | |
711 | ||
712 | #include "locking-selftest-rlock-hardirq.h" | |
713 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) | |
714 | ||
715 | #include "locking-selftest-wlock-hardirq.h" | |
716 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock) | |
717 | ||
718 | #include "locking-selftest-spin-softirq.h" | |
719 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin) | |
720 | ||
721 | #include "locking-selftest-rlock-softirq.h" | |
722 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) | |
723 | ||
724 | #include "locking-selftest-wlock-softirq.h" | |
725 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) | |
726 | ||
727 | #undef E1 | |
728 | #undef E2 | |
729 | #undef E3 | |
730 | ||
731 | /* | |
732 | * If a lock turns into softirq-safe, but earlier it took | |
733 | * a softirq-unsafe lock: | |
734 | */ | |
735 | ||
736 | #define E1() \ | |
737 | IRQ_DISABLE(); \ | |
738 | LOCK(A); \ | |
739 | LOCK(B); \ | |
740 | UNLOCK(B); \ | |
741 | UNLOCK(A); \ | |
742 | IRQ_ENABLE(); | |
743 | ||
744 | #define E2() \ | |
745 | LOCK(B); \ | |
746 | UNLOCK(B); | |
747 | ||
748 | #define E3() \ | |
749 | IRQ_ENTER(); \ | |
750 | LOCK(A); \ | |
751 | UNLOCK(A); \ | |
752 | IRQ_EXIT(); | |
753 | ||
754 | /* | |
755 | * Generate 36 testcases: | |
756 | */ | |
757 | #include "locking-selftest-spin-hardirq.h" | |
758 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) | |
759 | ||
760 | #include "locking-selftest-rlock-hardirq.h" | |
761 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) | |
762 | ||
763 | #include "locking-selftest-wlock-hardirq.h" | |
764 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock) | |
765 | ||
766 | #include "locking-selftest-spin-softirq.h" | |
767 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin) | |
768 | ||
769 | #include "locking-selftest-rlock-softirq.h" | |
770 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) | |
771 | ||
772 | #include "locking-selftest-wlock-softirq.h" | |
773 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) | |
774 | ||
775 | #undef E1 | |
776 | #undef E2 | |
777 | #undef E3 | |
778 | ||
779 | /* | |
780 | * read-lock / write-lock irq inversion. | |
781 | * | |
782 | * Deadlock scenario: | |
783 | * | |
784 | * CPU#1 is at #1, i.e. it has write-locked A, but has not | |
785 | * taken B yet. | |
786 | * | |
787 | * CPU#2 is at #2, i.e. it has locked B. | |
788 | * | |
789 | * Hardirq hits CPU#2 at point #2 and is trying to read-lock A. | |
790 | * | |
791 | * The deadlock occurs because CPU#1 will spin on B, and CPU#2 | |
792 | * will spin on A. | |
793 | */ | |
794 | ||
795 | #define E1() \ | |
796 | \ | |
797 | IRQ_DISABLE(); \ | |
798 | WL(A); \ | |
799 | LOCK(B); \ | |
800 | UNLOCK(B); \ | |
801 | WU(A); \ | |
802 | IRQ_ENABLE(); | |
803 | ||
804 | #define E2() \ | |
805 | \ | |
806 | LOCK(B); \ | |
807 | UNLOCK(B); | |
808 | ||
809 | #define E3() \ | |
810 | \ | |
811 | IRQ_ENTER(); \ | |
812 | RL(A); \ | |
813 | RU(A); \ | |
814 | IRQ_EXIT(); | |
815 | ||
816 | /* | |
817 | * Generate 36 testcases: | |
818 | */ | |
819 | #include "locking-selftest-spin-hardirq.h" | |
820 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin) | |
821 | ||
822 | #include "locking-selftest-rlock-hardirq.h" | |
823 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock) | |
824 | ||
825 | #include "locking-selftest-wlock-hardirq.h" | |
826 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock) | |
827 | ||
828 | #include "locking-selftest-spin-softirq.h" | |
829 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin) | |
830 | ||
831 | #include "locking-selftest-rlock-softirq.h" | |
832 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock) | |
833 | ||
834 | #include "locking-selftest-wlock-softirq.h" | |
835 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) | |
836 | ||
837 | #undef E1 | |
838 | #undef E2 | |
839 | #undef E3 | |
840 | ||
841 | /* | |
842 | * read-lock / write-lock recursion that is actually safe. | |
843 | */ | |
844 | ||
845 | #define E1() \ | |
846 | \ | |
847 | IRQ_DISABLE(); \ | |
848 | WL(A); \ | |
849 | WU(A); \ | |
850 | IRQ_ENABLE(); | |
851 | ||
852 | #define E2() \ | |
853 | \ | |
854 | RL(A); \ | |
855 | RU(A); \ | |
856 | ||
857 | #define E3() \ | |
858 | \ | |
859 | IRQ_ENTER(); \ | |
860 | RL(A); \ | |
861 | L(B); \ | |
862 | U(B); \ | |
863 | RU(A); \ | |
864 | IRQ_EXIT(); | |
865 | ||
866 | /* | |
867 | * Generate 12 testcases: | |
868 | */ | |
869 | #include "locking-selftest-hardirq.h" | |
870 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard) | |
871 | ||
872 | #include "locking-selftest-softirq.h" | |
873 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft) | |
874 | ||
875 | #undef E1 | |
876 | #undef E2 | |
877 | #undef E3 | |
878 | ||
879 | /* | |
880 | * read-lock / write-lock recursion that is unsafe. | |
881 | */ | |
882 | ||
883 | #define E1() \ | |
884 | \ | |
885 | IRQ_DISABLE(); \ | |
886 | L(B); \ | |
887 | WL(A); \ | |
888 | WU(A); \ | |
889 | U(B); \ | |
890 | IRQ_ENABLE(); | |
891 | ||
892 | #define E2() \ | |
893 | \ | |
894 | RL(A); \ | |
895 | RU(A); \ | |
896 | ||
897 | #define E3() \ | |
898 | \ | |
899 | IRQ_ENTER(); \ | |
900 | L(B); \ | |
901 | U(B); \ | |
902 | IRQ_EXIT(); | |
903 | ||
904 | /* | |
905 | * Generate 12 testcases: | |
906 | */ | |
907 | #include "locking-selftest-hardirq.h" | |
908 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard) | |
909 | ||
910 | #include "locking-selftest-softirq.h" | |
911 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft) | |
912 | ||
cae2ed9a IM |
913 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
914 | # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) | |
915 | # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) | |
916 | # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) | |
917 | # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) | |
1de99445 | 918 | # define I_WW(x) lockdep_reset_lock(&x.dep_map) |
cae2ed9a IM |
919 | #else |
920 | # define I_SPINLOCK(x) | |
921 | # define I_RWLOCK(x) | |
922 | # define I_MUTEX(x) | |
923 | # define I_RWSEM(x) | |
1de99445 | 924 | # define I_WW(x) |
cae2ed9a IM |
925 | #endif |
926 | ||
927 | #define I1(x) \ | |
928 | do { \ | |
929 | I_SPINLOCK(x); \ | |
930 | I_RWLOCK(x); \ | |
931 | I_MUTEX(x); \ | |
932 | I_RWSEM(x); \ | |
933 | } while (0) | |
934 | ||
935 | #define I2(x) \ | |
936 | do { \ | |
9fb1b90c | 937 | raw_spin_lock_init(&lock_##x); \ |
cae2ed9a IM |
938 | rwlock_init(&rwlock_##x); \ |
939 | mutex_init(&mutex_##x); \ | |
940 | init_rwsem(&rwsem_##x); \ | |
941 | } while (0) | |
942 | ||
943 | static void reset_locks(void) | |
944 | { | |
945 | local_irq_disable(); | |
1de99445 ML |
946 | lockdep_free_key_range(&ww_lockdep.acquire_key, 1); |
947 | lockdep_free_key_range(&ww_lockdep.mutex_key, 1); | |
948 | ||
cae2ed9a IM |
949 | I1(A); I1(B); I1(C); I1(D); |
950 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); | |
f3cf139e | 951 | I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
cae2ed9a IM |
952 | lockdep_reset(); |
953 | I2(A); I2(B); I2(C); I2(D); | |
954 | init_shared_classes(); | |
1de99445 | 955 | |
f3cf139e | 956 | ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
1de99445 ML |
957 | memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2)); |
958 | memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key)); | |
959 | memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key)); | |
cae2ed9a IM |
960 | local_irq_enable(); |
961 | } | |
962 | ||
963 | #undef I | |
964 | ||
965 | static int testcase_total; | |
966 | static int testcase_successes; | |
967 | static int expected_testcase_failures; | |
968 | static int unexpected_testcase_failures; | |
969 | ||
970 | static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) | |
971 | { | |
972 | unsigned long saved_preempt_count = preempt_count(); | |
cae2ed9a IM |
973 | |
974 | WARN_ON(irqs_disabled()); | |
975 | ||
976 | testcase_fn(); | |
977 | /* | |
978 | * Filter out expected failures: | |
979 | */ | |
980 | #ifndef CONFIG_PROVE_LOCKING | |
166989e3 | 981 | if (expected == FAILURE && debug_locks) { |
1de99445 ML |
982 | expected_testcase_failures++; |
983 | printk("failed|"); | |
166989e3 ML |
984 | } |
985 | else | |
986 | #endif | |
987 | if (debug_locks != expected) { | |
1de99445 ML |
988 | unexpected_testcase_failures++; |
989 | printk("FAILED|"); | |
990 | ||
991 | dump_stack(); | |
cae2ed9a IM |
992 | } else { |
993 | testcase_successes++; | |
994 | printk(" ok |"); | |
995 | } | |
996 | testcase_total++; | |
997 | ||
998 | if (debug_locks_verbose) | |
999 | printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n", | |
1000 | lockclass_mask, debug_locks, expected); | |
1001 | /* | |
1002 | * Some tests (e.g. double-unlock) might corrupt the preemption | |
1003 | * count, so restore it: | |
1004 | */ | |
4a2b4b22 | 1005 | preempt_count_set(saved_preempt_count); |
cae2ed9a IM |
1006 | #ifdef CONFIG_TRACE_IRQFLAGS |
1007 | if (softirq_count()) | |
1008 | current->softirqs_enabled = 0; | |
1009 | else | |
1010 | current->softirqs_enabled = 1; | |
1011 | #endif | |
1012 | ||
1013 | reset_locks(); | |
1014 | } | |
1015 | ||
1016 | static inline void print_testname(const char *testname) | |
1017 | { | |
1018 | printk("%33s:", testname); | |
1019 | } | |
1020 | ||
1021 | #define DO_TESTCASE_1(desc, name, nr) \ | |
1022 | print_testname(desc"/"#nr); \ | |
1023 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1024 | printk("\n"); | |
1025 | ||
1026 | #define DO_TESTCASE_1B(desc, name, nr) \ | |
1027 | print_testname(desc"/"#nr); \ | |
1028 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1029 | printk("\n"); | |
1030 | ||
1031 | #define DO_TESTCASE_3(desc, name, nr) \ | |
1032 | print_testname(desc"/"#nr); \ | |
1033 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ | |
1034 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1035 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1036 | printk("\n"); | |
1037 | ||
1038 | #define DO_TESTCASE_3RW(desc, name, nr) \ | |
1039 | print_testname(desc"/"#nr); \ | |
1040 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ | |
1041 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1042 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1043 | printk("\n"); | |
1044 | ||
1045 | #define DO_TESTCASE_6(desc, name) \ | |
1046 | print_testname(desc); \ | |
1047 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1048 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1049 | dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1050 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1051 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1052 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1053 | printk("\n"); | |
1054 | ||
1055 | #define DO_TESTCASE_6_SUCCESS(desc, name) \ | |
1056 | print_testname(desc); \ | |
1057 | dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ | |
1058 | dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1059 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1060 | dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ | |
1061 | dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1062 | dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1063 | printk("\n"); | |
1064 | ||
1065 | /* | |
1066 | * 'read' variant: rlocks must not trigger. | |
1067 | */ | |
1068 | #define DO_TESTCASE_6R(desc, name) \ | |
1069 | print_testname(desc); \ | |
1070 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1071 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1072 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1073 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1074 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1075 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1076 | printk("\n"); | |
1077 | ||
1078 | #define DO_TESTCASE_2I(desc, name, nr) \ | |
1079 | DO_TESTCASE_1("hard-"desc, name##_hard, nr); \ | |
1080 | DO_TESTCASE_1("soft-"desc, name##_soft, nr); | |
1081 | ||
1082 | #define DO_TESTCASE_2IB(desc, name, nr) \ | |
1083 | DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \ | |
1084 | DO_TESTCASE_1B("soft-"desc, name##_soft, nr); | |
1085 | ||
1086 | #define DO_TESTCASE_6I(desc, name, nr) \ | |
1087 | DO_TESTCASE_3("hard-"desc, name##_hard, nr); \ | |
1088 | DO_TESTCASE_3("soft-"desc, name##_soft, nr); | |
1089 | ||
1090 | #define DO_TESTCASE_6IRW(desc, name, nr) \ | |
1091 | DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \ | |
1092 | DO_TESTCASE_3RW("soft-"desc, name##_soft, nr); | |
1093 | ||
1094 | #define DO_TESTCASE_2x3(desc, name) \ | |
1095 | DO_TESTCASE_3(desc, name, 12); \ | |
1096 | DO_TESTCASE_3(desc, name, 21); | |
1097 | ||
1098 | #define DO_TESTCASE_2x6(desc, name) \ | |
1099 | DO_TESTCASE_6I(desc, name, 12); \ | |
1100 | DO_TESTCASE_6I(desc, name, 21); | |
1101 | ||
1102 | #define DO_TESTCASE_6x2(desc, name) \ | |
1103 | DO_TESTCASE_2I(desc, name, 123); \ | |
1104 | DO_TESTCASE_2I(desc, name, 132); \ | |
1105 | DO_TESTCASE_2I(desc, name, 213); \ | |
1106 | DO_TESTCASE_2I(desc, name, 231); \ | |
1107 | DO_TESTCASE_2I(desc, name, 312); \ | |
1108 | DO_TESTCASE_2I(desc, name, 321); | |
1109 | ||
1110 | #define DO_TESTCASE_6x2B(desc, name) \ | |
1111 | DO_TESTCASE_2IB(desc, name, 123); \ | |
1112 | DO_TESTCASE_2IB(desc, name, 132); \ | |
1113 | DO_TESTCASE_2IB(desc, name, 213); \ | |
1114 | DO_TESTCASE_2IB(desc, name, 231); \ | |
1115 | DO_TESTCASE_2IB(desc, name, 312); \ | |
1116 | DO_TESTCASE_2IB(desc, name, 321); | |
1117 | ||
1118 | #define DO_TESTCASE_6x6(desc, name) \ | |
1119 | DO_TESTCASE_6I(desc, name, 123); \ | |
1120 | DO_TESTCASE_6I(desc, name, 132); \ | |
1121 | DO_TESTCASE_6I(desc, name, 213); \ | |
1122 | DO_TESTCASE_6I(desc, name, 231); \ | |
1123 | DO_TESTCASE_6I(desc, name, 312); \ | |
1124 | DO_TESTCASE_6I(desc, name, 321); | |
1125 | ||
1126 | #define DO_TESTCASE_6x6RW(desc, name) \ | |
1127 | DO_TESTCASE_6IRW(desc, name, 123); \ | |
1128 | DO_TESTCASE_6IRW(desc, name, 132); \ | |
1129 | DO_TESTCASE_6IRW(desc, name, 213); \ | |
1130 | DO_TESTCASE_6IRW(desc, name, 231); \ | |
1131 | DO_TESTCASE_6IRW(desc, name, 312); \ | |
1132 | DO_TESTCASE_6IRW(desc, name, 321); | |
1133 | ||
1de99445 ML |
1134 | static void ww_test_fail_acquire(void) |
1135 | { | |
1136 | int ret; | |
1137 | ||
1138 | WWAI(&t); | |
1139 | t.stamp++; | |
1140 | ||
1141 | ret = WWL(&o, &t); | |
1142 | ||
1143 | if (WARN_ON(!o.ctx) || | |
1144 | WARN_ON(ret)) | |
1145 | return; | |
1146 | ||
1147 | /* No lockdep test, pure API */ | |
1148 | ret = WWL(&o, &t); | |
1149 | WARN_ON(ret != -EALREADY); | |
1150 | ||
1151 | ret = WWT(&o); | |
1152 | WARN_ON(ret); | |
1153 | ||
1154 | t2 = t; | |
1155 | t2.stamp++; | |
1156 | ret = WWL(&o, &t2); | |
1157 | WARN_ON(ret != -EDEADLK); | |
1158 | WWU(&o); | |
1159 | ||
1160 | if (WWT(&o)) | |
1161 | WWU(&o); | |
1162 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
1163 | else | |
1164 | DEBUG_LOCKS_WARN_ON(1); | |
1165 | #endif | |
1166 | } | |
1167 | ||
2fe3d4b1 ML |
1168 | static void ww_test_normal(void) |
1169 | { | |
1170 | int ret; | |
1171 | ||
1172 | WWAI(&t); | |
1173 | ||
1174 | /* | |
1175 | * None of the ww_mutex codepaths should be taken in the 'normal' | |
1176 | * mutex calls. The easiest way to verify this is by using the | |
1177 | * normal mutex calls, and making sure o.ctx is unmodified. | |
1178 | */ | |
1179 | ||
1180 | /* mutex_lock (and indirectly, mutex_lock_nested) */ | |
1181 | o.ctx = (void *)~0UL; | |
1182 | mutex_lock(&o.base); | |
1183 | mutex_unlock(&o.base); | |
1184 | WARN_ON(o.ctx != (void *)~0UL); | |
1185 | ||
1186 | /* mutex_lock_interruptible (and *_nested) */ | |
1187 | o.ctx = (void *)~0UL; | |
1188 | ret = mutex_lock_interruptible(&o.base); | |
1189 | if (!ret) | |
1190 | mutex_unlock(&o.base); | |
1191 | else | |
1192 | WARN_ON(1); | |
1193 | WARN_ON(o.ctx != (void *)~0UL); | |
1194 | ||
1195 | /* mutex_lock_killable (and *_nested) */ | |
1196 | o.ctx = (void *)~0UL; | |
1197 | ret = mutex_lock_killable(&o.base); | |
1198 | if (!ret) | |
1199 | mutex_unlock(&o.base); | |
1200 | else | |
1201 | WARN_ON(1); | |
1202 | WARN_ON(o.ctx != (void *)~0UL); | |
1203 | ||
1204 | /* trylock, succeeding */ | |
1205 | o.ctx = (void *)~0UL; | |
1206 | ret = mutex_trylock(&o.base); | |
1207 | WARN_ON(!ret); | |
1208 | if (ret) | |
1209 | mutex_unlock(&o.base); | |
1210 | else | |
1211 | WARN_ON(1); | |
1212 | WARN_ON(o.ctx != (void *)~0UL); | |
1213 | ||
1214 | /* trylock, failing */ | |
1215 | o.ctx = (void *)~0UL; | |
1216 | mutex_lock(&o.base); | |
1217 | ret = mutex_trylock(&o.base); | |
1218 | WARN_ON(ret); | |
1219 | mutex_unlock(&o.base); | |
1220 | WARN_ON(o.ctx != (void *)~0UL); | |
1221 | ||
1222 | /* nest_lock */ | |
1223 | o.ctx = (void *)~0UL; | |
1224 | mutex_lock_nest_lock(&o.base, &t); | |
1225 | mutex_unlock(&o.base); | |
1226 | WARN_ON(o.ctx != (void *)~0UL); | |
1227 | } | |
1228 | ||
1de99445 ML |
1229 | static void ww_test_two_contexts(void) |
1230 | { | |
1231 | WWAI(&t); | |
1232 | WWAI(&t2); | |
1233 | } | |
1234 | ||
1235 | static void ww_test_diff_class(void) | |
1236 | { | |
1237 | WWAI(&t); | |
1238 | #ifdef CONFIG_DEBUG_MUTEXES | |
1239 | t.ww_class = NULL; | |
1240 | #endif | |
1241 | WWL(&o, &t); | |
1242 | } | |
1243 | ||
1244 | static void ww_test_context_done_twice(void) | |
1245 | { | |
1246 | WWAI(&t); | |
1247 | WWAD(&t); | |
1248 | WWAD(&t); | |
1249 | WWAF(&t); | |
1250 | } | |
1251 | ||
1252 | static void ww_test_context_unlock_twice(void) | |
1253 | { | |
1254 | WWAI(&t); | |
1255 | WWAD(&t); | |
1256 | WWAF(&t); | |
1257 | WWAF(&t); | |
1258 | } | |
1259 | ||
1260 | static void ww_test_context_fini_early(void) | |
1261 | { | |
1262 | WWAI(&t); | |
1263 | WWL(&o, &t); | |
1264 | WWAD(&t); | |
1265 | WWAF(&t); | |
1266 | } | |
1267 | ||
1268 | static void ww_test_context_lock_after_done(void) | |
1269 | { | |
1270 | WWAI(&t); | |
1271 | WWAD(&t); | |
1272 | WWL(&o, &t); | |
1273 | } | |
1274 | ||
1275 | static void ww_test_object_unlock_twice(void) | |
1276 | { | |
1277 | WWL1(&o); | |
1278 | WWU(&o); | |
1279 | WWU(&o); | |
1280 | } | |
1281 | ||
1282 | static void ww_test_object_lock_unbalanced(void) | |
1283 | { | |
1284 | WWAI(&t); | |
1285 | WWL(&o, &t); | |
1286 | t.acquired = 0; | |
1287 | WWU(&o); | |
1288 | WWAF(&t); | |
1289 | } | |
1290 | ||
1291 | static void ww_test_object_lock_stale_context(void) | |
1292 | { | |
1293 | WWAI(&t); | |
1294 | o.ctx = &t2; | |
1295 | WWL(&o, &t); | |
1296 | } | |
1297 | ||
f3cf139e ML |
1298 | static void ww_test_edeadlk_normal(void) |
1299 | { | |
1300 | int ret; | |
1301 | ||
1302 | mutex_lock(&o2.base); | |
1303 | o2.ctx = &t2; | |
1304 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1305 | ||
1306 | WWAI(&t); | |
1307 | t2 = t; | |
1308 | t2.stamp--; | |
1309 | ||
1310 | ret = WWL(&o, &t); | |
1311 | WARN_ON(ret); | |
1312 | ||
1313 | ret = WWL(&o2, &t); | |
1314 | WARN_ON(ret != -EDEADLK); | |
1315 | ||
1316 | o2.ctx = NULL; | |
1317 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1318 | mutex_unlock(&o2.base); | |
1319 | WWU(&o); | |
1320 | ||
1321 | WWL(&o2, &t); | |
1322 | } | |
1323 | ||
1324 | static void ww_test_edeadlk_normal_slow(void) | |
1325 | { | |
1326 | int ret; | |
1327 | ||
1328 | mutex_lock(&o2.base); | |
1329 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1330 | o2.ctx = &t2; | |
1331 | ||
1332 | WWAI(&t); | |
1333 | t2 = t; | |
1334 | t2.stamp--; | |
1335 | ||
1336 | ret = WWL(&o, &t); | |
1337 | WARN_ON(ret); | |
1338 | ||
1339 | ret = WWL(&o2, &t); | |
1340 | WARN_ON(ret != -EDEADLK); | |
1341 | ||
1342 | o2.ctx = NULL; | |
1343 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1344 | mutex_unlock(&o2.base); | |
1345 | WWU(&o); | |
1346 | ||
1347 | ww_mutex_lock_slow(&o2, &t); | |
1348 | } | |
1349 | ||
1350 | static void ww_test_edeadlk_no_unlock(void) | |
1351 | { | |
1352 | int ret; | |
1353 | ||
1354 | mutex_lock(&o2.base); | |
1355 | o2.ctx = &t2; | |
1356 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1357 | ||
1358 | WWAI(&t); | |
1359 | t2 = t; | |
1360 | t2.stamp--; | |
1361 | ||
1362 | ret = WWL(&o, &t); | |
1363 | WARN_ON(ret); | |
1364 | ||
1365 | ret = WWL(&o2, &t); | |
1366 | WARN_ON(ret != -EDEADLK); | |
1367 | ||
1368 | o2.ctx = NULL; | |
1369 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1370 | mutex_unlock(&o2.base); | |
1371 | ||
1372 | WWL(&o2, &t); | |
1373 | } | |
1374 | ||
1375 | static void ww_test_edeadlk_no_unlock_slow(void) | |
1376 | { | |
1377 | int ret; | |
1378 | ||
1379 | mutex_lock(&o2.base); | |
1380 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1381 | o2.ctx = &t2; | |
1382 | ||
1383 | WWAI(&t); | |
1384 | t2 = t; | |
1385 | t2.stamp--; | |
1386 | ||
1387 | ret = WWL(&o, &t); | |
1388 | WARN_ON(ret); | |
1389 | ||
1390 | ret = WWL(&o2, &t); | |
1391 | WARN_ON(ret != -EDEADLK); | |
1392 | ||
1393 | o2.ctx = NULL; | |
1394 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1395 | mutex_unlock(&o2.base); | |
1396 | ||
1397 | ww_mutex_lock_slow(&o2, &t); | |
1398 | } | |
1399 | ||
1400 | static void ww_test_edeadlk_acquire_more(void) | |
1401 | { | |
1402 | int ret; | |
1403 | ||
1404 | mutex_lock(&o2.base); | |
1405 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1406 | o2.ctx = &t2; | |
1407 | ||
1408 | WWAI(&t); | |
1409 | t2 = t; | |
1410 | t2.stamp--; | |
1411 | ||
1412 | ret = WWL(&o, &t); | |
1413 | WARN_ON(ret); | |
1414 | ||
1415 | ret = WWL(&o2, &t); | |
1416 | WARN_ON(ret != -EDEADLK); | |
1417 | ||
1418 | ret = WWL(&o3, &t); | |
1419 | } | |
1420 | ||
1421 | static void ww_test_edeadlk_acquire_more_slow(void) | |
1422 | { | |
1423 | int ret; | |
1424 | ||
1425 | mutex_lock(&o2.base); | |
1426 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1427 | o2.ctx = &t2; | |
1428 | ||
1429 | WWAI(&t); | |
1430 | t2 = t; | |
1431 | t2.stamp--; | |
1432 | ||
1433 | ret = WWL(&o, &t); | |
1434 | WARN_ON(ret); | |
1435 | ||
1436 | ret = WWL(&o2, &t); | |
1437 | WARN_ON(ret != -EDEADLK); | |
1438 | ||
1439 | ww_mutex_lock_slow(&o3, &t); | |
1440 | } | |
1441 | ||
1442 | static void ww_test_edeadlk_acquire_more_edeadlk(void) | |
1443 | { | |
1444 | int ret; | |
1445 | ||
1446 | mutex_lock(&o2.base); | |
1447 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1448 | o2.ctx = &t2; | |
1449 | ||
1450 | mutex_lock(&o3.base); | |
1451 | mutex_release(&o3.base.dep_map, 1, _THIS_IP_); | |
1452 | o3.ctx = &t2; | |
1453 | ||
1454 | WWAI(&t); | |
1455 | t2 = t; | |
1456 | t2.stamp--; | |
1457 | ||
1458 | ret = WWL(&o, &t); | |
1459 | WARN_ON(ret); | |
1460 | ||
1461 | ret = WWL(&o2, &t); | |
1462 | WARN_ON(ret != -EDEADLK); | |
1463 | ||
1464 | ret = WWL(&o3, &t); | |
1465 | WARN_ON(ret != -EDEADLK); | |
1466 | } | |
1467 | ||
1468 | static void ww_test_edeadlk_acquire_more_edeadlk_slow(void) | |
1469 | { | |
1470 | int ret; | |
1471 | ||
1472 | mutex_lock(&o2.base); | |
1473 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1474 | o2.ctx = &t2; | |
1475 | ||
1476 | mutex_lock(&o3.base); | |
1477 | mutex_release(&o3.base.dep_map, 1, _THIS_IP_); | |
1478 | o3.ctx = &t2; | |
1479 | ||
1480 | WWAI(&t); | |
1481 | t2 = t; | |
1482 | t2.stamp--; | |
1483 | ||
1484 | ret = WWL(&o, &t); | |
1485 | WARN_ON(ret); | |
1486 | ||
1487 | ret = WWL(&o2, &t); | |
1488 | WARN_ON(ret != -EDEADLK); | |
1489 | ||
1490 | ww_mutex_lock_slow(&o3, &t); | |
1491 | } | |
1492 | ||
1493 | static void ww_test_edeadlk_acquire_wrong(void) | |
1494 | { | |
1495 | int ret; | |
1496 | ||
1497 | mutex_lock(&o2.base); | |
1498 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1499 | o2.ctx = &t2; | |
1500 | ||
1501 | WWAI(&t); | |
1502 | t2 = t; | |
1503 | t2.stamp--; | |
1504 | ||
1505 | ret = WWL(&o, &t); | |
1506 | WARN_ON(ret); | |
1507 | ||
1508 | ret = WWL(&o2, &t); | |
1509 | WARN_ON(ret != -EDEADLK); | |
1510 | if (!ret) | |
1511 | WWU(&o2); | |
1512 | ||
1513 | WWU(&o); | |
1514 | ||
1515 | ret = WWL(&o3, &t); | |
1516 | } | |
1517 | ||
1518 | static void ww_test_edeadlk_acquire_wrong_slow(void) | |
1519 | { | |
1520 | int ret; | |
1521 | ||
1522 | mutex_lock(&o2.base); | |
1523 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1524 | o2.ctx = &t2; | |
1525 | ||
1526 | WWAI(&t); | |
1527 | t2 = t; | |
1528 | t2.stamp--; | |
1529 | ||
1530 | ret = WWL(&o, &t); | |
1531 | WARN_ON(ret); | |
1532 | ||
1533 | ret = WWL(&o2, &t); | |
1534 | WARN_ON(ret != -EDEADLK); | |
1535 | if (!ret) | |
1536 | WWU(&o2); | |
1537 | ||
1538 | WWU(&o); | |
1539 | ||
1540 | ww_mutex_lock_slow(&o3, &t); | |
1541 | } | |
1542 | ||
1de99445 ML |
1543 | static void ww_test_spin_nest_unlocked(void) |
1544 | { | |
1545 | raw_spin_lock_nest_lock(&lock_A, &o.base); | |
1546 | U(A); | |
1547 | } | |
1548 | ||
1549 | static void ww_test_unneeded_slow(void) | |
1550 | { | |
1551 | WWAI(&t); | |
1552 | ||
1553 | ww_mutex_lock_slow(&o, &t); | |
1554 | } | |
1555 | ||
1556 | static void ww_test_context_block(void) | |
1557 | { | |
1558 | int ret; | |
1559 | ||
1560 | WWAI(&t); | |
1561 | ||
1562 | ret = WWL(&o, &t); | |
1563 | WARN_ON(ret); | |
1564 | WWL1(&o2); | |
1565 | } | |
1566 | ||
1567 | static void ww_test_context_try(void) | |
1568 | { | |
1569 | int ret; | |
1570 | ||
1571 | WWAI(&t); | |
1572 | ||
1573 | ret = WWL(&o, &t); | |
1574 | WARN_ON(ret); | |
1575 | ||
1576 | ret = WWT(&o2); | |
1577 | WARN_ON(!ret); | |
1578 | WWU(&o2); | |
1579 | WWU(&o); | |
1580 | } | |
1581 | ||
1582 | static void ww_test_context_context(void) | |
1583 | { | |
1584 | int ret; | |
1585 | ||
1586 | WWAI(&t); | |
1587 | ||
1588 | ret = WWL(&o, &t); | |
1589 | WARN_ON(ret); | |
1590 | ||
1591 | ret = WWL(&o2, &t); | |
1592 | WARN_ON(ret); | |
1593 | ||
1594 | WWU(&o2); | |
1595 | WWU(&o); | |
1596 | } | |
1597 | ||
1598 | static void ww_test_try_block(void) | |
1599 | { | |
1600 | bool ret; | |
1601 | ||
1602 | ret = WWT(&o); | |
1603 | WARN_ON(!ret); | |
1604 | ||
1605 | WWL1(&o2); | |
1606 | WWU(&o2); | |
1607 | WWU(&o); | |
1608 | } | |
1609 | ||
1610 | static void ww_test_try_try(void) | |
1611 | { | |
1612 | bool ret; | |
1613 | ||
1614 | ret = WWT(&o); | |
1615 | WARN_ON(!ret); | |
1616 | ret = WWT(&o2); | |
1617 | WARN_ON(!ret); | |
1618 | WWU(&o2); | |
1619 | WWU(&o); | |
1620 | } | |
1621 | ||
1622 | static void ww_test_try_context(void) | |
1623 | { | |
1624 | int ret; | |
1625 | ||
1626 | ret = WWT(&o); | |
1627 | WARN_ON(!ret); | |
1628 | ||
1629 | WWAI(&t); | |
1630 | ||
1631 | ret = WWL(&o2, &t); | |
1632 | WARN_ON(ret); | |
1633 | } | |
1634 | ||
1635 | static void ww_test_block_block(void) | |
1636 | { | |
1637 | WWL1(&o); | |
1638 | WWL1(&o2); | |
1639 | } | |
1640 | ||
1641 | static void ww_test_block_try(void) | |
1642 | { | |
1643 | bool ret; | |
1644 | ||
1645 | WWL1(&o); | |
1646 | ret = WWT(&o2); | |
1647 | WARN_ON(!ret); | |
1648 | } | |
1649 | ||
1650 | static void ww_test_block_context(void) | |
1651 | { | |
1652 | int ret; | |
1653 | ||
1654 | WWL1(&o); | |
1655 | WWAI(&t); | |
1656 | ||
1657 | ret = WWL(&o2, &t); | |
1658 | WARN_ON(ret); | |
1659 | } | |
1660 | ||
1661 | static void ww_test_spin_block(void) | |
1662 | { | |
1663 | L(A); | |
1664 | U(A); | |
1665 | ||
1666 | WWL1(&o); | |
1667 | L(A); | |
1668 | U(A); | |
1669 | WWU(&o); | |
1670 | ||
1671 | L(A); | |
1672 | WWL1(&o); | |
1673 | WWU(&o); | |
1674 | U(A); | |
1675 | } | |
1676 | ||
1677 | static void ww_test_spin_try(void) | |
1678 | { | |
1679 | bool ret; | |
1680 | ||
1681 | L(A); | |
1682 | U(A); | |
1683 | ||
1684 | ret = WWT(&o); | |
1685 | WARN_ON(!ret); | |
1686 | L(A); | |
1687 | U(A); | |
1688 | WWU(&o); | |
1689 | ||
1690 | L(A); | |
1691 | ret = WWT(&o); | |
1692 | WARN_ON(!ret); | |
1693 | WWU(&o); | |
1694 | U(A); | |
1695 | } | |
1696 | ||
1697 | static void ww_test_spin_context(void) | |
1698 | { | |
1699 | int ret; | |
1700 | ||
1701 | L(A); | |
1702 | U(A); | |
1703 | ||
1704 | WWAI(&t); | |
1705 | ||
1706 | ret = WWL(&o, &t); | |
1707 | WARN_ON(ret); | |
1708 | L(A); | |
1709 | U(A); | |
1710 | WWU(&o); | |
1711 | ||
1712 | L(A); | |
1713 | ret = WWL(&o, &t); | |
1714 | WARN_ON(ret); | |
1715 | WWU(&o); | |
1716 | U(A); | |
1717 | } | |
1718 | ||
1719 | static void ww_tests(void) | |
1720 | { | |
1721 | printk(" --------------------------------------------------------------------------\n"); | |
1722 | printk(" | Wound/wait tests |\n"); | |
1723 | printk(" ---------------------\n"); | |
1724 | ||
1725 | print_testname("ww api failures"); | |
1726 | dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW); | |
2fe3d4b1 | 1727 | dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
1de99445 ML |
1728 | dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
1729 | printk("\n"); | |
1730 | ||
1731 | print_testname("ww contexts mixing"); | |
1732 | dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW); | |
1733 | dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW); | |
1734 | printk("\n"); | |
1735 | ||
1736 | print_testname("finishing ww context"); | |
1737 | dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW); | |
1738 | dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW); | |
1739 | dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW); | |
1740 | dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW); | |
1741 | printk("\n"); | |
1742 | ||
1743 | print_testname("locking mismatches"); | |
1744 | dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW); | |
1745 | dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW); | |
1746 | dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW); | |
1747 | printk("\n"); | |
1748 | ||
f3cf139e ML |
1749 | print_testname("EDEADLK handling"); |
1750 | dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW); | |
1751 | dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW); | |
1752 | dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW); | |
1753 | dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW); | |
1754 | dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW); | |
1755 | dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW); | |
1756 | dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW); | |
1757 | dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW); | |
1758 | dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW); | |
1759 | dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW); | |
1760 | printk("\n"); | |
1761 | ||
1de99445 ML |
1762 | print_testname("spinlock nest unlocked"); |
1763 | dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW); | |
1764 | printk("\n"); | |
1765 | ||
1766 | printk(" -----------------------------------------------------\n"); | |
1767 | printk(" |block | try |context|\n"); | |
1768 | printk(" -----------------------------------------------------\n"); | |
1769 | ||
1770 | print_testname("context"); | |
1771 | dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW); | |
1772 | dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW); | |
1773 | dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW); | |
1774 | printk("\n"); | |
1775 | ||
1776 | print_testname("try"); | |
1777 | dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW); | |
1778 | dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW); | |
1779 | dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW); | |
1780 | printk("\n"); | |
1781 | ||
1782 | print_testname("block"); | |
1783 | dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW); | |
1784 | dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW); | |
1785 | dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW); | |
1786 | printk("\n"); | |
1787 | ||
1788 | print_testname("spinlock"); | |
1789 | dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW); | |
1790 | dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW); | |
1791 | dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW); | |
1792 | printk("\n"); | |
1793 | } | |
cae2ed9a IM |
1794 | |
1795 | void locking_selftest(void) | |
1796 | { | |
1797 | /* | |
1798 | * Got a locking failure before the selftest ran? | |
1799 | */ | |
1800 | if (!debug_locks) { | |
1801 | printk("----------------------------------\n"); | |
1802 | printk("| Locking API testsuite disabled |\n"); | |
1803 | printk("----------------------------------\n"); | |
1804 | return; | |
1805 | } | |
1806 | ||
1807 | /* | |
1808 | * Run the testsuite: | |
1809 | */ | |
1810 | printk("------------------------\n"); | |
1811 | printk("| Locking API testsuite:\n"); | |
1812 | printk("----------------------------------------------------------------------------\n"); | |
1813 | printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n"); | |
1814 | printk(" --------------------------------------------------------------------------\n"); | |
1815 | ||
1816 | init_shared_classes(); | |
1817 | debug_locks_silent = !debug_locks_verbose; | |
1818 | ||
6c9076ec | 1819 | DO_TESTCASE_6R("A-A deadlock", AA); |
cae2ed9a IM |
1820 | DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); |
1821 | DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA); | |
1822 | DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC); | |
1823 | DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA); | |
1824 | DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA); | |
1825 | DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA); | |
1826 | DO_TESTCASE_6("double unlock", double_unlock); | |
1827 | DO_TESTCASE_6("initialize held", init_held); | |
1828 | DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order); | |
1829 | ||
1830 | printk(" --------------------------------------------------------------------------\n"); | |
1831 | print_testname("recursive read-lock"); | |
1832 | printk(" |"); | |
1833 | dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); | |
1834 | printk(" |"); | |
1835 | dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); | |
1836 | printk("\n"); | |
1837 | ||
1838 | print_testname("recursive read-lock #2"); | |
1839 | printk(" |"); | |
6c9076ec | 1840 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
cae2ed9a IM |
1841 | printk(" |"); |
1842 | dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); | |
1843 | printk("\n"); | |
1844 | ||
1845 | print_testname("mixed read-write-lock"); | |
1846 | printk(" |"); | |
1847 | dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); | |
1848 | printk(" |"); | |
1849 | dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); | |
1850 | printk("\n"); | |
1851 | ||
1852 | print_testname("mixed write-read-lock"); | |
1853 | printk(" |"); | |
1854 | dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); | |
1855 | printk(" |"); | |
1856 | dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); | |
1857 | printk("\n"); | |
1858 | ||
1859 | printk(" --------------------------------------------------------------------------\n"); | |
1860 | ||
1861 | /* | |
1862 | * irq-context testcases: | |
1863 | */ | |
1864 | DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1); | |
1865 | DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A); | |
1866 | DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B); | |
1867 | DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3); | |
1868 | DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4); | |
1869 | DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion); | |
1870 | ||
1871 | DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion); | |
1872 | // DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2); | |
1873 | ||
1de99445 ML |
1874 | ww_tests(); |
1875 | ||
cae2ed9a IM |
1876 | if (unexpected_testcase_failures) { |
1877 | printk("-----------------------------------------------------------------\n"); | |
1878 | debug_locks = 0; | |
1879 | printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", | |
1880 | unexpected_testcase_failures, testcase_total); | |
1881 | printk("-----------------------------------------------------------------\n"); | |
1882 | } else if (expected_testcase_failures && testcase_successes) { | |
1883 | printk("--------------------------------------------------------\n"); | |
1884 | printk("%3d out of %3d testcases failed, as expected. |\n", | |
1885 | expected_testcase_failures, testcase_total); | |
1886 | printk("----------------------------------------------------\n"); | |
1887 | debug_locks = 1; | |
1888 | } else if (expected_testcase_failures && !testcase_successes) { | |
1889 | printk("--------------------------------------------------------\n"); | |
1890 | printk("All %3d testcases failed, as expected. |\n", | |
1891 | expected_testcase_failures); | |
1892 | printk("----------------------------------------\n"); | |
1893 | debug_locks = 1; | |
1894 | } else { | |
1895 | printk("-------------------------------------------------------\n"); | |
1896 | printk("Good, all %3d testcases passed! |\n", | |
1897 | testcase_successes); | |
1898 | printk("---------------------------------\n"); | |
1899 | debug_locks = 1; | |
1900 | } | |
1901 | debug_locks_silent = 0; | |
1902 | } |