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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> |
15 | #include <linux/ww_mutex.h> |
16 | #include <linux/sched.h> |
17 | #include <linux/delay.h> |
18 | #include <linux/lockdep.h> |
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 | |
30 | static DEFINE_WW_CLASS(ww_lockdep); |
31 | |
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 |
48 | #define LOCKTYPE_WW 0x10 |
49 | |
50 | static struct ww_acquire_ctx t, t2; |
51 | static struct ww_mutex o, o2, o3; |
52 | |
53 | /* |
54 | * Normal standalone locks, for the circular and irq-context |
55 | * dependency tests: |
56 | */ |
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); |
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 | */ |
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); |
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 \ |
117 | init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \ |
118 | struct mutex *mutex, struct rw_semaphore *rwsem)\ |
119 | { \ |
120 | raw_spin_lock_init(lock); \ |
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(); \ |
153 | __irq_enter(); \ |
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(); \ |
166 | lockdep_softirq_enter(); \ |
167 | WARN_ON(!in_softirq()); |
168 | |
169 | #define SOFTIRQ_EXIT() \ |
170 | lockdep_softirq_exit(); \ |
171 | local_irq_enable(); \ |
172 | local_bh_enable(); |
173 | |
174 | /* |
175 | * Shortcuts for lock/unlock API variants, to keep |
176 | * the testcases compact: |
177 | */ |
178 | #define L(x) raw_spin_lock(&lock_##x) |
179 | #define U(x) raw_spin_unlock(&lock_##x) |
180 | #define LU(x) L(x); U(x) |
181 | #define SI(x) raw_spin_lock_init(&lock_##x) |
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 | |
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 | |
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 |
271 | * allowed to recurse on the same lock class: |
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); |
282 | RL(X2); // this one should NOT fail |
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 | |
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) |
918 | # define I_WW(x) lockdep_reset_lock(&x.dep_map) |
919 | #else |
920 | # define I_SPINLOCK(x) |
921 | # define I_RWLOCK(x) |
922 | # define I_MUTEX(x) |
923 | # define I_RWSEM(x) |
924 | # define I_WW(x) |
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 { \ |
937 | raw_spin_lock_init(&lock_##x); \ |
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(); |
946 | lockdep_free_key_range(&ww_lockdep.acquire_key, 1); |
947 | lockdep_free_key_range(&ww_lockdep.mutex_key, 1); |
948 | |
949 | I1(A); I1(B); I1(C); I1(D); |
950 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); |
951 | I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
952 | lockdep_reset(); |
953 | I2(A); I2(B); I2(C); I2(D); |
954 | init_shared_classes(); |
955 | |
956 | ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
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)); |
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(); |
973 | |
974 | WARN_ON(irqs_disabled()); |
975 | |
976 | testcase_fn(); |
977 | /* |
978 | * Filter out expected failures: |
979 | */ |
980 | #ifndef CONFIG_PROVE_LOCKING |
981 | if (expected == FAILURE && debug_locks) { |
982 | expected_testcase_failures++; |
983 | printk("failed|"); |
984 | } |
985 | else |
986 | #endif |
987 | if (debug_locks != expected) { |
988 | unexpected_testcase_failures++; |
989 | printk("FAILED|"); |
990 | |
991 | dump_stack(); |
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 | */ |
1005 | preempt_count_set(saved_preempt_count); |
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 | |
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 | |
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 | |
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 | |
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 | |
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); |
1727 | dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
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 | |
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 | |
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 | } |
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 | |
1819 | DO_TESTCASE_6R("A-A deadlock", AA); |
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(" |"); |
1840 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
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 | |
1874 | ww_tests(); |
1875 | |
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 | } |
1903 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
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jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
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jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9