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> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/delay.h> | |
fbb9ce95 | 17 | #include <linux/lockdep.h> |
cae2ed9a IM |
18 | #include <linux/spinlock.h> |
19 | #include <linux/kallsyms.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/debug_locks.h> | |
22 | #include <linux/irqflags.h> | |
23 | ||
24 | /* | |
25 | * Change this to 1 if you want to see the failure printouts: | |
26 | */ | |
27 | static unsigned int debug_locks_verbose; | |
28 | ||
29 | static int __init setup_debug_locks_verbose(char *str) | |
30 | { | |
31 | get_option(&str, &debug_locks_verbose); | |
32 | ||
33 | return 1; | |
34 | } | |
35 | ||
36 | __setup("debug_locks_verbose=", setup_debug_locks_verbose); | |
37 | ||
38 | #define FAILURE 0 | |
39 | #define SUCCESS 1 | |
40 | ||
41 | #define LOCKTYPE_SPIN 0x1 | |
42 | #define LOCKTYPE_RWLOCK 0x2 | |
43 | #define LOCKTYPE_MUTEX 0x4 | |
44 | #define LOCKTYPE_RWSEM 0x8 | |
45 | ||
46 | /* | |
47 | * Normal standalone locks, for the circular and irq-context | |
48 | * dependency tests: | |
49 | */ | |
9fb1b90c YZ |
50 | static DEFINE_RAW_SPINLOCK(lock_A); |
51 | static DEFINE_RAW_SPINLOCK(lock_B); | |
52 | static DEFINE_RAW_SPINLOCK(lock_C); | |
53 | static DEFINE_RAW_SPINLOCK(lock_D); | |
cae2ed9a IM |
54 | |
55 | static DEFINE_RWLOCK(rwlock_A); | |
56 | static DEFINE_RWLOCK(rwlock_B); | |
57 | static DEFINE_RWLOCK(rwlock_C); | |
58 | static DEFINE_RWLOCK(rwlock_D); | |
59 | ||
60 | static DEFINE_MUTEX(mutex_A); | |
61 | static DEFINE_MUTEX(mutex_B); | |
62 | static DEFINE_MUTEX(mutex_C); | |
63 | static DEFINE_MUTEX(mutex_D); | |
64 | ||
65 | static DECLARE_RWSEM(rwsem_A); | |
66 | static DECLARE_RWSEM(rwsem_B); | |
67 | static DECLARE_RWSEM(rwsem_C); | |
68 | static DECLARE_RWSEM(rwsem_D); | |
69 | ||
70 | /* | |
71 | * Locks that we initialize dynamically as well so that | |
72 | * e.g. X1 and X2 becomes two instances of the same class, | |
73 | * but X* and Y* are different classes. We do this so that | |
74 | * we do not trigger a real lockup: | |
75 | */ | |
9fb1b90c YZ |
76 | static DEFINE_RAW_SPINLOCK(lock_X1); |
77 | static DEFINE_RAW_SPINLOCK(lock_X2); | |
78 | static DEFINE_RAW_SPINLOCK(lock_Y1); | |
79 | static DEFINE_RAW_SPINLOCK(lock_Y2); | |
80 | static DEFINE_RAW_SPINLOCK(lock_Z1); | |
81 | static DEFINE_RAW_SPINLOCK(lock_Z2); | |
cae2ed9a IM |
82 | |
83 | static DEFINE_RWLOCK(rwlock_X1); | |
84 | static DEFINE_RWLOCK(rwlock_X2); | |
85 | static DEFINE_RWLOCK(rwlock_Y1); | |
86 | static DEFINE_RWLOCK(rwlock_Y2); | |
87 | static DEFINE_RWLOCK(rwlock_Z1); | |
88 | static DEFINE_RWLOCK(rwlock_Z2); | |
89 | ||
90 | static DEFINE_MUTEX(mutex_X1); | |
91 | static DEFINE_MUTEX(mutex_X2); | |
92 | static DEFINE_MUTEX(mutex_Y1); | |
93 | static DEFINE_MUTEX(mutex_Y2); | |
94 | static DEFINE_MUTEX(mutex_Z1); | |
95 | static DEFINE_MUTEX(mutex_Z2); | |
96 | ||
97 | static DECLARE_RWSEM(rwsem_X1); | |
98 | static DECLARE_RWSEM(rwsem_X2); | |
99 | static DECLARE_RWSEM(rwsem_Y1); | |
100 | static DECLARE_RWSEM(rwsem_Y2); | |
101 | static DECLARE_RWSEM(rwsem_Z1); | |
102 | static DECLARE_RWSEM(rwsem_Z2); | |
103 | ||
104 | /* | |
105 | * non-inlined runtime initializers, to let separate locks share | |
106 | * the same lock-class: | |
107 | */ | |
108 | #define INIT_CLASS_FUNC(class) \ | |
109 | static noinline void \ | |
9fb1b90c YZ |
110 | init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \ |
111 | struct mutex *mutex, struct rw_semaphore *rwsem)\ | |
cae2ed9a | 112 | { \ |
9fb1b90c | 113 | raw_spin_lock_init(lock); \ |
cae2ed9a IM |
114 | rwlock_init(rwlock); \ |
115 | mutex_init(mutex); \ | |
116 | init_rwsem(rwsem); \ | |
117 | } | |
118 | ||
119 | INIT_CLASS_FUNC(X) | |
120 | INIT_CLASS_FUNC(Y) | |
121 | INIT_CLASS_FUNC(Z) | |
122 | ||
123 | static void init_shared_classes(void) | |
124 | { | |
125 | init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1); | |
126 | init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2); | |
127 | ||
128 | init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1); | |
129 | init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2); | |
130 | ||
131 | init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1); | |
132 | init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2); | |
133 | } | |
134 | ||
135 | /* | |
136 | * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests. | |
137 | * The following functions use a lock from a simulated hardirq/softirq | |
138 | * context, causing the locks to be marked as hardirq-safe/softirq-safe: | |
139 | */ | |
140 | ||
141 | #define HARDIRQ_DISABLE local_irq_disable | |
142 | #define HARDIRQ_ENABLE local_irq_enable | |
143 | ||
144 | #define HARDIRQ_ENTER() \ | |
145 | local_irq_disable(); \ | |
ba9f207c | 146 | __irq_enter(); \ |
cae2ed9a IM |
147 | WARN_ON(!in_irq()); |
148 | ||
149 | #define HARDIRQ_EXIT() \ | |
150 | __irq_exit(); \ | |
151 | local_irq_enable(); | |
152 | ||
153 | #define SOFTIRQ_DISABLE local_bh_disable | |
154 | #define SOFTIRQ_ENABLE local_bh_enable | |
155 | ||
156 | #define SOFTIRQ_ENTER() \ | |
157 | local_bh_disable(); \ | |
158 | local_irq_disable(); \ | |
d820ac4c | 159 | lockdep_softirq_enter(); \ |
cae2ed9a IM |
160 | WARN_ON(!in_softirq()); |
161 | ||
162 | #define SOFTIRQ_EXIT() \ | |
d820ac4c | 163 | lockdep_softirq_exit(); \ |
cae2ed9a IM |
164 | local_irq_enable(); \ |
165 | local_bh_enable(); | |
166 | ||
167 | /* | |
168 | * Shortcuts for lock/unlock API variants, to keep | |
169 | * the testcases compact: | |
170 | */ | |
9fb1b90c YZ |
171 | #define L(x) raw_spin_lock(&lock_##x) |
172 | #define U(x) raw_spin_unlock(&lock_##x) | |
cae2ed9a | 173 | #define LU(x) L(x); U(x) |
9fb1b90c | 174 | #define SI(x) raw_spin_lock_init(&lock_##x) |
cae2ed9a IM |
175 | |
176 | #define WL(x) write_lock(&rwlock_##x) | |
177 | #define WU(x) write_unlock(&rwlock_##x) | |
178 | #define WLU(x) WL(x); WU(x) | |
179 | ||
180 | #define RL(x) read_lock(&rwlock_##x) | |
181 | #define RU(x) read_unlock(&rwlock_##x) | |
182 | #define RLU(x) RL(x); RU(x) | |
183 | #define RWI(x) rwlock_init(&rwlock_##x) | |
184 | ||
185 | #define ML(x) mutex_lock(&mutex_##x) | |
186 | #define MU(x) mutex_unlock(&mutex_##x) | |
187 | #define MI(x) mutex_init(&mutex_##x) | |
188 | ||
189 | #define WSL(x) down_write(&rwsem_##x) | |
190 | #define WSU(x) up_write(&rwsem_##x) | |
191 | ||
192 | #define RSL(x) down_read(&rwsem_##x) | |
193 | #define RSU(x) up_read(&rwsem_##x) | |
194 | #define RWSI(x) init_rwsem(&rwsem_##x) | |
195 | ||
196 | #define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x) | |
197 | ||
198 | /* | |
199 | * Generate different permutations of the same testcase, using | |
200 | * the same basic lock-dependency/state events: | |
201 | */ | |
202 | ||
203 | #define GENERATE_TESTCASE(name) \ | |
204 | \ | |
205 | static void name(void) { E(); } | |
206 | ||
207 | #define GENERATE_PERMUTATIONS_2_EVENTS(name) \ | |
208 | \ | |
209 | static void name##_12(void) { E1(); E2(); } \ | |
210 | static void name##_21(void) { E2(); E1(); } | |
211 | ||
212 | #define GENERATE_PERMUTATIONS_3_EVENTS(name) \ | |
213 | \ | |
214 | static void name##_123(void) { E1(); E2(); E3(); } \ | |
215 | static void name##_132(void) { E1(); E3(); E2(); } \ | |
216 | static void name##_213(void) { E2(); E1(); E3(); } \ | |
217 | static void name##_231(void) { E2(); E3(); E1(); } \ | |
218 | static void name##_312(void) { E3(); E1(); E2(); } \ | |
219 | static void name##_321(void) { E3(); E2(); E1(); } | |
220 | ||
221 | /* | |
222 | * AA deadlock: | |
223 | */ | |
224 | ||
225 | #define E() \ | |
226 | \ | |
227 | LOCK(X1); \ | |
228 | LOCK(X2); /* this one should fail */ | |
229 | ||
230 | /* | |
231 | * 6 testcases: | |
232 | */ | |
233 | #include "locking-selftest-spin.h" | |
234 | GENERATE_TESTCASE(AA_spin) | |
235 | #include "locking-selftest-wlock.h" | |
236 | GENERATE_TESTCASE(AA_wlock) | |
237 | #include "locking-selftest-rlock.h" | |
238 | GENERATE_TESTCASE(AA_rlock) | |
239 | #include "locking-selftest-mutex.h" | |
240 | GENERATE_TESTCASE(AA_mutex) | |
241 | #include "locking-selftest-wsem.h" | |
242 | GENERATE_TESTCASE(AA_wsem) | |
243 | #include "locking-selftest-rsem.h" | |
244 | GENERATE_TESTCASE(AA_rsem) | |
245 | ||
246 | #undef E | |
247 | ||
248 | /* | |
249 | * Special-case for read-locking, they are | |
6c9076ec | 250 | * allowed to recurse on the same lock class: |
cae2ed9a IM |
251 | */ |
252 | static void rlock_AA1(void) | |
253 | { | |
254 | RL(X1); | |
255 | RL(X1); // this one should NOT fail | |
256 | } | |
257 | ||
258 | static void rlock_AA1B(void) | |
259 | { | |
260 | RL(X1); | |
6c9076ec | 261 | RL(X2); // this one should NOT fail |
cae2ed9a IM |
262 | } |
263 | ||
264 | static void rsem_AA1(void) | |
265 | { | |
266 | RSL(X1); | |
267 | RSL(X1); // this one should fail | |
268 | } | |
269 | ||
270 | static void rsem_AA1B(void) | |
271 | { | |
272 | RSL(X1); | |
273 | RSL(X2); // this one should fail | |
274 | } | |
275 | /* | |
276 | * The mixing of read and write locks is not allowed: | |
277 | */ | |
278 | static void rlock_AA2(void) | |
279 | { | |
280 | RL(X1); | |
281 | WL(X2); // this one should fail | |
282 | } | |
283 | ||
284 | static void rsem_AA2(void) | |
285 | { | |
286 | RSL(X1); | |
287 | WSL(X2); // this one should fail | |
288 | } | |
289 | ||
290 | static void rlock_AA3(void) | |
291 | { | |
292 | WL(X1); | |
293 | RL(X2); // this one should fail | |
294 | } | |
295 | ||
296 | static void rsem_AA3(void) | |
297 | { | |
298 | WSL(X1); | |
299 | RSL(X2); // this one should fail | |
300 | } | |
301 | ||
302 | /* | |
303 | * ABBA deadlock: | |
304 | */ | |
305 | ||
306 | #define E() \ | |
307 | \ | |
308 | LOCK_UNLOCK_2(A, B); \ | |
309 | LOCK_UNLOCK_2(B, A); /* fail */ | |
310 | ||
311 | /* | |
312 | * 6 testcases: | |
313 | */ | |
314 | #include "locking-selftest-spin.h" | |
315 | GENERATE_TESTCASE(ABBA_spin) | |
316 | #include "locking-selftest-wlock.h" | |
317 | GENERATE_TESTCASE(ABBA_wlock) | |
318 | #include "locking-selftest-rlock.h" | |
319 | GENERATE_TESTCASE(ABBA_rlock) | |
320 | #include "locking-selftest-mutex.h" | |
321 | GENERATE_TESTCASE(ABBA_mutex) | |
322 | #include "locking-selftest-wsem.h" | |
323 | GENERATE_TESTCASE(ABBA_wsem) | |
324 | #include "locking-selftest-rsem.h" | |
325 | GENERATE_TESTCASE(ABBA_rsem) | |
326 | ||
327 | #undef E | |
328 | ||
329 | /* | |
330 | * AB BC CA deadlock: | |
331 | */ | |
332 | ||
333 | #define E() \ | |
334 | \ | |
335 | LOCK_UNLOCK_2(A, B); \ | |
336 | LOCK_UNLOCK_2(B, C); \ | |
337 | LOCK_UNLOCK_2(C, A); /* fail */ | |
338 | ||
339 | /* | |
340 | * 6 testcases: | |
341 | */ | |
342 | #include "locking-selftest-spin.h" | |
343 | GENERATE_TESTCASE(ABBCCA_spin) | |
344 | #include "locking-selftest-wlock.h" | |
345 | GENERATE_TESTCASE(ABBCCA_wlock) | |
346 | #include "locking-selftest-rlock.h" | |
347 | GENERATE_TESTCASE(ABBCCA_rlock) | |
348 | #include "locking-selftest-mutex.h" | |
349 | GENERATE_TESTCASE(ABBCCA_mutex) | |
350 | #include "locking-selftest-wsem.h" | |
351 | GENERATE_TESTCASE(ABBCCA_wsem) | |
352 | #include "locking-selftest-rsem.h" | |
353 | GENERATE_TESTCASE(ABBCCA_rsem) | |
354 | ||
355 | #undef E | |
356 | ||
357 | /* | |
358 | * AB CA BC deadlock: | |
359 | */ | |
360 | ||
361 | #define E() \ | |
362 | \ | |
363 | LOCK_UNLOCK_2(A, B); \ | |
364 | LOCK_UNLOCK_2(C, A); \ | |
365 | LOCK_UNLOCK_2(B, C); /* fail */ | |
366 | ||
367 | /* | |
368 | * 6 testcases: | |
369 | */ | |
370 | #include "locking-selftest-spin.h" | |
371 | GENERATE_TESTCASE(ABCABC_spin) | |
372 | #include "locking-selftest-wlock.h" | |
373 | GENERATE_TESTCASE(ABCABC_wlock) | |
374 | #include "locking-selftest-rlock.h" | |
375 | GENERATE_TESTCASE(ABCABC_rlock) | |
376 | #include "locking-selftest-mutex.h" | |
377 | GENERATE_TESTCASE(ABCABC_mutex) | |
378 | #include "locking-selftest-wsem.h" | |
379 | GENERATE_TESTCASE(ABCABC_wsem) | |
380 | #include "locking-selftest-rsem.h" | |
381 | GENERATE_TESTCASE(ABCABC_rsem) | |
382 | ||
383 | #undef E | |
384 | ||
385 | /* | |
386 | * AB BC CD DA deadlock: | |
387 | */ | |
388 | ||
389 | #define E() \ | |
390 | \ | |
391 | LOCK_UNLOCK_2(A, B); \ | |
392 | LOCK_UNLOCK_2(B, C); \ | |
393 | LOCK_UNLOCK_2(C, D); \ | |
394 | LOCK_UNLOCK_2(D, A); /* fail */ | |
395 | ||
396 | /* | |
397 | * 6 testcases: | |
398 | */ | |
399 | #include "locking-selftest-spin.h" | |
400 | GENERATE_TESTCASE(ABBCCDDA_spin) | |
401 | #include "locking-selftest-wlock.h" | |
402 | GENERATE_TESTCASE(ABBCCDDA_wlock) | |
403 | #include "locking-selftest-rlock.h" | |
404 | GENERATE_TESTCASE(ABBCCDDA_rlock) | |
405 | #include "locking-selftest-mutex.h" | |
406 | GENERATE_TESTCASE(ABBCCDDA_mutex) | |
407 | #include "locking-selftest-wsem.h" | |
408 | GENERATE_TESTCASE(ABBCCDDA_wsem) | |
409 | #include "locking-selftest-rsem.h" | |
410 | GENERATE_TESTCASE(ABBCCDDA_rsem) | |
411 | ||
412 | #undef E | |
413 | ||
414 | /* | |
415 | * AB CD BD DA deadlock: | |
416 | */ | |
417 | #define E() \ | |
418 | \ | |
419 | LOCK_UNLOCK_2(A, B); \ | |
420 | LOCK_UNLOCK_2(C, D); \ | |
421 | LOCK_UNLOCK_2(B, D); \ | |
422 | LOCK_UNLOCK_2(D, A); /* fail */ | |
423 | ||
424 | /* | |
425 | * 6 testcases: | |
426 | */ | |
427 | #include "locking-selftest-spin.h" | |
428 | GENERATE_TESTCASE(ABCDBDDA_spin) | |
429 | #include "locking-selftest-wlock.h" | |
430 | GENERATE_TESTCASE(ABCDBDDA_wlock) | |
431 | #include "locking-selftest-rlock.h" | |
432 | GENERATE_TESTCASE(ABCDBDDA_rlock) | |
433 | #include "locking-selftest-mutex.h" | |
434 | GENERATE_TESTCASE(ABCDBDDA_mutex) | |
435 | #include "locking-selftest-wsem.h" | |
436 | GENERATE_TESTCASE(ABCDBDDA_wsem) | |
437 | #include "locking-selftest-rsem.h" | |
438 | GENERATE_TESTCASE(ABCDBDDA_rsem) | |
439 | ||
440 | #undef E | |
441 | ||
442 | /* | |
443 | * AB CD BC DA deadlock: | |
444 | */ | |
445 | #define E() \ | |
446 | \ | |
447 | LOCK_UNLOCK_2(A, B); \ | |
448 | LOCK_UNLOCK_2(C, D); \ | |
449 | LOCK_UNLOCK_2(B, C); \ | |
450 | LOCK_UNLOCK_2(D, A); /* fail */ | |
451 | ||
452 | /* | |
453 | * 6 testcases: | |
454 | */ | |
455 | #include "locking-selftest-spin.h" | |
456 | GENERATE_TESTCASE(ABCDBCDA_spin) | |
457 | #include "locking-selftest-wlock.h" | |
458 | GENERATE_TESTCASE(ABCDBCDA_wlock) | |
459 | #include "locking-selftest-rlock.h" | |
460 | GENERATE_TESTCASE(ABCDBCDA_rlock) | |
461 | #include "locking-selftest-mutex.h" | |
462 | GENERATE_TESTCASE(ABCDBCDA_mutex) | |
463 | #include "locking-selftest-wsem.h" | |
464 | GENERATE_TESTCASE(ABCDBCDA_wsem) | |
465 | #include "locking-selftest-rsem.h" | |
466 | GENERATE_TESTCASE(ABCDBCDA_rsem) | |
467 | ||
468 | #undef E | |
469 | ||
470 | /* | |
471 | * Double unlock: | |
472 | */ | |
473 | #define E() \ | |
474 | \ | |
475 | LOCK(A); \ | |
476 | UNLOCK(A); \ | |
477 | UNLOCK(A); /* fail */ | |
478 | ||
479 | /* | |
480 | * 6 testcases: | |
481 | */ | |
482 | #include "locking-selftest-spin.h" | |
483 | GENERATE_TESTCASE(double_unlock_spin) | |
484 | #include "locking-selftest-wlock.h" | |
485 | GENERATE_TESTCASE(double_unlock_wlock) | |
486 | #include "locking-selftest-rlock.h" | |
487 | GENERATE_TESTCASE(double_unlock_rlock) | |
488 | #include "locking-selftest-mutex.h" | |
489 | GENERATE_TESTCASE(double_unlock_mutex) | |
490 | #include "locking-selftest-wsem.h" | |
491 | GENERATE_TESTCASE(double_unlock_wsem) | |
492 | #include "locking-selftest-rsem.h" | |
493 | GENERATE_TESTCASE(double_unlock_rsem) | |
494 | ||
495 | #undef E | |
496 | ||
497 | /* | |
498 | * Bad unlock ordering: | |
499 | */ | |
500 | #define E() \ | |
501 | \ | |
502 | LOCK(A); \ | |
503 | LOCK(B); \ | |
504 | UNLOCK(A); /* fail */ \ | |
505 | UNLOCK(B); | |
506 | ||
507 | /* | |
508 | * 6 testcases: | |
509 | */ | |
510 | #include "locking-selftest-spin.h" | |
511 | GENERATE_TESTCASE(bad_unlock_order_spin) | |
512 | #include "locking-selftest-wlock.h" | |
513 | GENERATE_TESTCASE(bad_unlock_order_wlock) | |
514 | #include "locking-selftest-rlock.h" | |
515 | GENERATE_TESTCASE(bad_unlock_order_rlock) | |
516 | #include "locking-selftest-mutex.h" | |
517 | GENERATE_TESTCASE(bad_unlock_order_mutex) | |
518 | #include "locking-selftest-wsem.h" | |
519 | GENERATE_TESTCASE(bad_unlock_order_wsem) | |
520 | #include "locking-selftest-rsem.h" | |
521 | GENERATE_TESTCASE(bad_unlock_order_rsem) | |
522 | ||
523 | #undef E | |
524 | ||
525 | /* | |
526 | * initializing a held lock: | |
527 | */ | |
528 | #define E() \ | |
529 | \ | |
530 | LOCK(A); \ | |
531 | INIT(A); /* fail */ | |
532 | ||
533 | /* | |
534 | * 6 testcases: | |
535 | */ | |
536 | #include "locking-selftest-spin.h" | |
537 | GENERATE_TESTCASE(init_held_spin) | |
538 | #include "locking-selftest-wlock.h" | |
539 | GENERATE_TESTCASE(init_held_wlock) | |
540 | #include "locking-selftest-rlock.h" | |
541 | GENERATE_TESTCASE(init_held_rlock) | |
542 | #include "locking-selftest-mutex.h" | |
543 | GENERATE_TESTCASE(init_held_mutex) | |
544 | #include "locking-selftest-wsem.h" | |
545 | GENERATE_TESTCASE(init_held_wsem) | |
546 | #include "locking-selftest-rsem.h" | |
547 | GENERATE_TESTCASE(init_held_rsem) | |
548 | ||
549 | #undef E | |
550 | ||
551 | /* | |
552 | * locking an irq-safe lock with irqs enabled: | |
553 | */ | |
554 | #define E1() \ | |
555 | \ | |
556 | IRQ_ENTER(); \ | |
557 | LOCK(A); \ | |
558 | UNLOCK(A); \ | |
559 | IRQ_EXIT(); | |
560 | ||
561 | #define E2() \ | |
562 | \ | |
563 | LOCK(A); \ | |
564 | UNLOCK(A); | |
565 | ||
566 | /* | |
567 | * Generate 24 testcases: | |
568 | */ | |
569 | #include "locking-selftest-spin-hardirq.h" | |
570 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) | |
571 | ||
572 | #include "locking-selftest-rlock-hardirq.h" | |
573 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) | |
574 | ||
575 | #include "locking-selftest-wlock-hardirq.h" | |
576 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock) | |
577 | ||
578 | #include "locking-selftest-spin-softirq.h" | |
579 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin) | |
580 | ||
581 | #include "locking-selftest-rlock-softirq.h" | |
582 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) | |
583 | ||
584 | #include "locking-selftest-wlock-softirq.h" | |
585 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) | |
586 | ||
587 | #undef E1 | |
588 | #undef E2 | |
589 | ||
590 | /* | |
591 | * Enabling hardirqs with a softirq-safe lock held: | |
592 | */ | |
593 | #define E1() \ | |
594 | \ | |
595 | SOFTIRQ_ENTER(); \ | |
596 | LOCK(A); \ | |
597 | UNLOCK(A); \ | |
598 | SOFTIRQ_EXIT(); | |
599 | ||
600 | #define E2() \ | |
601 | \ | |
602 | HARDIRQ_DISABLE(); \ | |
603 | LOCK(A); \ | |
604 | HARDIRQ_ENABLE(); \ | |
605 | UNLOCK(A); | |
606 | ||
607 | /* | |
608 | * Generate 12 testcases: | |
609 | */ | |
610 | #include "locking-selftest-spin.h" | |
611 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin) | |
612 | ||
613 | #include "locking-selftest-wlock.h" | |
614 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock) | |
615 | ||
616 | #include "locking-selftest-rlock.h" | |
617 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) | |
618 | ||
619 | #undef E1 | |
620 | #undef E2 | |
621 | ||
622 | /* | |
623 | * Enabling irqs with an irq-safe lock held: | |
624 | */ | |
625 | #define E1() \ | |
626 | \ | |
627 | IRQ_ENTER(); \ | |
628 | LOCK(A); \ | |
629 | UNLOCK(A); \ | |
630 | IRQ_EXIT(); | |
631 | ||
632 | #define E2() \ | |
633 | \ | |
634 | IRQ_DISABLE(); \ | |
635 | LOCK(A); \ | |
636 | IRQ_ENABLE(); \ | |
637 | UNLOCK(A); | |
638 | ||
639 | /* | |
640 | * Generate 24 testcases: | |
641 | */ | |
642 | #include "locking-selftest-spin-hardirq.h" | |
643 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) | |
644 | ||
645 | #include "locking-selftest-rlock-hardirq.h" | |
646 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) | |
647 | ||
648 | #include "locking-selftest-wlock-hardirq.h" | |
649 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock) | |
650 | ||
651 | #include "locking-selftest-spin-softirq.h" | |
652 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin) | |
653 | ||
654 | #include "locking-selftest-rlock-softirq.h" | |
655 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) | |
656 | ||
657 | #include "locking-selftest-wlock-softirq.h" | |
658 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) | |
659 | ||
660 | #undef E1 | |
661 | #undef E2 | |
662 | ||
663 | /* | |
664 | * Acquiring a irq-unsafe lock while holding an irq-safe-lock: | |
665 | */ | |
666 | #define E1() \ | |
667 | \ | |
668 | LOCK(A); \ | |
669 | LOCK(B); \ | |
670 | UNLOCK(B); \ | |
671 | UNLOCK(A); \ | |
672 | ||
673 | #define E2() \ | |
674 | \ | |
675 | LOCK(B); \ | |
676 | UNLOCK(B); | |
677 | ||
678 | #define E3() \ | |
679 | \ | |
680 | IRQ_ENTER(); \ | |
681 | LOCK(A); \ | |
682 | UNLOCK(A); \ | |
683 | IRQ_EXIT(); | |
684 | ||
685 | /* | |
686 | * Generate 36 testcases: | |
687 | */ | |
688 | #include "locking-selftest-spin-hardirq.h" | |
689 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) | |
690 | ||
691 | #include "locking-selftest-rlock-hardirq.h" | |
692 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) | |
693 | ||
694 | #include "locking-selftest-wlock-hardirq.h" | |
695 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock) | |
696 | ||
697 | #include "locking-selftest-spin-softirq.h" | |
698 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin) | |
699 | ||
700 | #include "locking-selftest-rlock-softirq.h" | |
701 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) | |
702 | ||
703 | #include "locking-selftest-wlock-softirq.h" | |
704 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) | |
705 | ||
706 | #undef E1 | |
707 | #undef E2 | |
708 | #undef E3 | |
709 | ||
710 | /* | |
711 | * If a lock turns into softirq-safe, but earlier it took | |
712 | * a softirq-unsafe lock: | |
713 | */ | |
714 | ||
715 | #define E1() \ | |
716 | IRQ_DISABLE(); \ | |
717 | LOCK(A); \ | |
718 | LOCK(B); \ | |
719 | UNLOCK(B); \ | |
720 | UNLOCK(A); \ | |
721 | IRQ_ENABLE(); | |
722 | ||
723 | #define E2() \ | |
724 | LOCK(B); \ | |
725 | UNLOCK(B); | |
726 | ||
727 | #define E3() \ | |
728 | IRQ_ENTER(); \ | |
729 | LOCK(A); \ | |
730 | UNLOCK(A); \ | |
731 | IRQ_EXIT(); | |
732 | ||
733 | /* | |
734 | * Generate 36 testcases: | |
735 | */ | |
736 | #include "locking-selftest-spin-hardirq.h" | |
737 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) | |
738 | ||
739 | #include "locking-selftest-rlock-hardirq.h" | |
740 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) | |
741 | ||
742 | #include "locking-selftest-wlock-hardirq.h" | |
743 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock) | |
744 | ||
745 | #include "locking-selftest-spin-softirq.h" | |
746 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin) | |
747 | ||
748 | #include "locking-selftest-rlock-softirq.h" | |
749 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) | |
750 | ||
751 | #include "locking-selftest-wlock-softirq.h" | |
752 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) | |
753 | ||
754 | #undef E1 | |
755 | #undef E2 | |
756 | #undef E3 | |
757 | ||
758 | /* | |
759 | * read-lock / write-lock irq inversion. | |
760 | * | |
761 | * Deadlock scenario: | |
762 | * | |
763 | * CPU#1 is at #1, i.e. it has write-locked A, but has not | |
764 | * taken B yet. | |
765 | * | |
766 | * CPU#2 is at #2, i.e. it has locked B. | |
767 | * | |
768 | * Hardirq hits CPU#2 at point #2 and is trying to read-lock A. | |
769 | * | |
770 | * The deadlock occurs because CPU#1 will spin on B, and CPU#2 | |
771 | * will spin on A. | |
772 | */ | |
773 | ||
774 | #define E1() \ | |
775 | \ | |
776 | IRQ_DISABLE(); \ | |
777 | WL(A); \ | |
778 | LOCK(B); \ | |
779 | UNLOCK(B); \ | |
780 | WU(A); \ | |
781 | IRQ_ENABLE(); | |
782 | ||
783 | #define E2() \ | |
784 | \ | |
785 | LOCK(B); \ | |
786 | UNLOCK(B); | |
787 | ||
788 | #define E3() \ | |
789 | \ | |
790 | IRQ_ENTER(); \ | |
791 | RL(A); \ | |
792 | RU(A); \ | |
793 | IRQ_EXIT(); | |
794 | ||
795 | /* | |
796 | * Generate 36 testcases: | |
797 | */ | |
798 | #include "locking-selftest-spin-hardirq.h" | |
799 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin) | |
800 | ||
801 | #include "locking-selftest-rlock-hardirq.h" | |
802 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock) | |
803 | ||
804 | #include "locking-selftest-wlock-hardirq.h" | |
805 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock) | |
806 | ||
807 | #include "locking-selftest-spin-softirq.h" | |
808 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin) | |
809 | ||
810 | #include "locking-selftest-rlock-softirq.h" | |
811 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock) | |
812 | ||
813 | #include "locking-selftest-wlock-softirq.h" | |
814 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) | |
815 | ||
816 | #undef E1 | |
817 | #undef E2 | |
818 | #undef E3 | |
819 | ||
820 | /* | |
821 | * read-lock / write-lock recursion that is actually safe. | |
822 | */ | |
823 | ||
824 | #define E1() \ | |
825 | \ | |
826 | IRQ_DISABLE(); \ | |
827 | WL(A); \ | |
828 | WU(A); \ | |
829 | IRQ_ENABLE(); | |
830 | ||
831 | #define E2() \ | |
832 | \ | |
833 | RL(A); \ | |
834 | RU(A); \ | |
835 | ||
836 | #define E3() \ | |
837 | \ | |
838 | IRQ_ENTER(); \ | |
839 | RL(A); \ | |
840 | L(B); \ | |
841 | U(B); \ | |
842 | RU(A); \ | |
843 | IRQ_EXIT(); | |
844 | ||
845 | /* | |
846 | * Generate 12 testcases: | |
847 | */ | |
848 | #include "locking-selftest-hardirq.h" | |
849 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard) | |
850 | ||
851 | #include "locking-selftest-softirq.h" | |
852 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft) | |
853 | ||
854 | #undef E1 | |
855 | #undef E2 | |
856 | #undef E3 | |
857 | ||
858 | /* | |
859 | * read-lock / write-lock recursion that is unsafe. | |
860 | */ | |
861 | ||
862 | #define E1() \ | |
863 | \ | |
864 | IRQ_DISABLE(); \ | |
865 | L(B); \ | |
866 | WL(A); \ | |
867 | WU(A); \ | |
868 | U(B); \ | |
869 | IRQ_ENABLE(); | |
870 | ||
871 | #define E2() \ | |
872 | \ | |
873 | RL(A); \ | |
874 | RU(A); \ | |
875 | ||
876 | #define E3() \ | |
877 | \ | |
878 | IRQ_ENTER(); \ | |
879 | L(B); \ | |
880 | U(B); \ | |
881 | IRQ_EXIT(); | |
882 | ||
883 | /* | |
884 | * Generate 12 testcases: | |
885 | */ | |
886 | #include "locking-selftest-hardirq.h" | |
887 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard) | |
888 | ||
889 | #include "locking-selftest-softirq.h" | |
890 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft) | |
891 | ||
cae2ed9a IM |
892 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
893 | # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) | |
894 | # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) | |
895 | # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) | |
896 | # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) | |
897 | #else | |
898 | # define I_SPINLOCK(x) | |
899 | # define I_RWLOCK(x) | |
900 | # define I_MUTEX(x) | |
901 | # define I_RWSEM(x) | |
902 | #endif | |
903 | ||
904 | #define I1(x) \ | |
905 | do { \ | |
906 | I_SPINLOCK(x); \ | |
907 | I_RWLOCK(x); \ | |
908 | I_MUTEX(x); \ | |
909 | I_RWSEM(x); \ | |
910 | } while (0) | |
911 | ||
912 | #define I2(x) \ | |
913 | do { \ | |
9fb1b90c | 914 | raw_spin_lock_init(&lock_##x); \ |
cae2ed9a IM |
915 | rwlock_init(&rwlock_##x); \ |
916 | mutex_init(&mutex_##x); \ | |
917 | init_rwsem(&rwsem_##x); \ | |
918 | } while (0) | |
919 | ||
920 | static void reset_locks(void) | |
921 | { | |
922 | local_irq_disable(); | |
923 | I1(A); I1(B); I1(C); I1(D); | |
924 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); | |
925 | lockdep_reset(); | |
926 | I2(A); I2(B); I2(C); I2(D); | |
927 | init_shared_classes(); | |
928 | local_irq_enable(); | |
929 | } | |
930 | ||
931 | #undef I | |
932 | ||
933 | static int testcase_total; | |
934 | static int testcase_successes; | |
935 | static int expected_testcase_failures; | |
936 | static int unexpected_testcase_failures; | |
937 | ||
938 | static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) | |
939 | { | |
940 | unsigned long saved_preempt_count = preempt_count(); | |
941 | int expected_failure = 0; | |
942 | ||
943 | WARN_ON(irqs_disabled()); | |
944 | ||
945 | testcase_fn(); | |
946 | /* | |
947 | * Filter out expected failures: | |
948 | */ | |
949 | #ifndef CONFIG_PROVE_LOCKING | |
950 | if ((lockclass_mask & LOCKTYPE_SPIN) && debug_locks != expected) | |
951 | expected_failure = 1; | |
952 | if ((lockclass_mask & LOCKTYPE_RWLOCK) && debug_locks != expected) | |
953 | expected_failure = 1; | |
954 | if ((lockclass_mask & LOCKTYPE_MUTEX) && debug_locks != expected) | |
955 | expected_failure = 1; | |
956 | if ((lockclass_mask & LOCKTYPE_RWSEM) && debug_locks != expected) | |
957 | expected_failure = 1; | |
958 | #endif | |
959 | if (debug_locks != expected) { | |
960 | if (expected_failure) { | |
961 | expected_testcase_failures++; | |
962 | printk("failed|"); | |
963 | } else { | |
964 | unexpected_testcase_failures++; | |
2ee91f19 | 965 | |
cae2ed9a | 966 | printk("FAILED|"); |
2ee91f19 | 967 | dump_stack(); |
cae2ed9a IM |
968 | } |
969 | } else { | |
970 | testcase_successes++; | |
971 | printk(" ok |"); | |
972 | } | |
973 | testcase_total++; | |
974 | ||
975 | if (debug_locks_verbose) | |
976 | printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n", | |
977 | lockclass_mask, debug_locks, expected); | |
978 | /* | |
979 | * Some tests (e.g. double-unlock) might corrupt the preemption | |
980 | * count, so restore it: | |
981 | */ | |
982 | preempt_count() = saved_preempt_count; | |
983 | #ifdef CONFIG_TRACE_IRQFLAGS | |
984 | if (softirq_count()) | |
985 | current->softirqs_enabled = 0; | |
986 | else | |
987 | current->softirqs_enabled = 1; | |
988 | #endif | |
989 | ||
990 | reset_locks(); | |
991 | } | |
992 | ||
993 | static inline void print_testname(const char *testname) | |
994 | { | |
995 | printk("%33s:", testname); | |
996 | } | |
997 | ||
998 | #define DO_TESTCASE_1(desc, name, nr) \ | |
999 | print_testname(desc"/"#nr); \ | |
1000 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1001 | printk("\n"); | |
1002 | ||
1003 | #define DO_TESTCASE_1B(desc, name, nr) \ | |
1004 | print_testname(desc"/"#nr); \ | |
1005 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1006 | printk("\n"); | |
1007 | ||
1008 | #define DO_TESTCASE_3(desc, name, nr) \ | |
1009 | print_testname(desc"/"#nr); \ | |
1010 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ | |
1011 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1012 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1013 | printk("\n"); | |
1014 | ||
1015 | #define DO_TESTCASE_3RW(desc, name, nr) \ | |
1016 | print_testname(desc"/"#nr); \ | |
1017 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ | |
1018 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1019 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1020 | printk("\n"); | |
1021 | ||
1022 | #define DO_TESTCASE_6(desc, name) \ | |
1023 | print_testname(desc); \ | |
1024 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1025 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1026 | dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1027 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1028 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1029 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1030 | printk("\n"); | |
1031 | ||
1032 | #define DO_TESTCASE_6_SUCCESS(desc, name) \ | |
1033 | print_testname(desc); \ | |
1034 | dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ | |
1035 | dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1036 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1037 | dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ | |
1038 | dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1039 | dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1040 | printk("\n"); | |
1041 | ||
1042 | /* | |
1043 | * 'read' variant: rlocks must not trigger. | |
1044 | */ | |
1045 | #define DO_TESTCASE_6R(desc, name) \ | |
1046 | print_testname(desc); \ | |
1047 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1048 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1049 | dotest(name##_rlock, SUCCESS, 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_2I(desc, name, nr) \ | |
1056 | DO_TESTCASE_1("hard-"desc, name##_hard, nr); \ | |
1057 | DO_TESTCASE_1("soft-"desc, name##_soft, nr); | |
1058 | ||
1059 | #define DO_TESTCASE_2IB(desc, name, nr) \ | |
1060 | DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \ | |
1061 | DO_TESTCASE_1B("soft-"desc, name##_soft, nr); | |
1062 | ||
1063 | #define DO_TESTCASE_6I(desc, name, nr) \ | |
1064 | DO_TESTCASE_3("hard-"desc, name##_hard, nr); \ | |
1065 | DO_TESTCASE_3("soft-"desc, name##_soft, nr); | |
1066 | ||
1067 | #define DO_TESTCASE_6IRW(desc, name, nr) \ | |
1068 | DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \ | |
1069 | DO_TESTCASE_3RW("soft-"desc, name##_soft, nr); | |
1070 | ||
1071 | #define DO_TESTCASE_2x3(desc, name) \ | |
1072 | DO_TESTCASE_3(desc, name, 12); \ | |
1073 | DO_TESTCASE_3(desc, name, 21); | |
1074 | ||
1075 | #define DO_TESTCASE_2x6(desc, name) \ | |
1076 | DO_TESTCASE_6I(desc, name, 12); \ | |
1077 | DO_TESTCASE_6I(desc, name, 21); | |
1078 | ||
1079 | #define DO_TESTCASE_6x2(desc, name) \ | |
1080 | DO_TESTCASE_2I(desc, name, 123); \ | |
1081 | DO_TESTCASE_2I(desc, name, 132); \ | |
1082 | DO_TESTCASE_2I(desc, name, 213); \ | |
1083 | DO_TESTCASE_2I(desc, name, 231); \ | |
1084 | DO_TESTCASE_2I(desc, name, 312); \ | |
1085 | DO_TESTCASE_2I(desc, name, 321); | |
1086 | ||
1087 | #define DO_TESTCASE_6x2B(desc, name) \ | |
1088 | DO_TESTCASE_2IB(desc, name, 123); \ | |
1089 | DO_TESTCASE_2IB(desc, name, 132); \ | |
1090 | DO_TESTCASE_2IB(desc, name, 213); \ | |
1091 | DO_TESTCASE_2IB(desc, name, 231); \ | |
1092 | DO_TESTCASE_2IB(desc, name, 312); \ | |
1093 | DO_TESTCASE_2IB(desc, name, 321); | |
1094 | ||
1095 | #define DO_TESTCASE_6x6(desc, name) \ | |
1096 | DO_TESTCASE_6I(desc, name, 123); \ | |
1097 | DO_TESTCASE_6I(desc, name, 132); \ | |
1098 | DO_TESTCASE_6I(desc, name, 213); \ | |
1099 | DO_TESTCASE_6I(desc, name, 231); \ | |
1100 | DO_TESTCASE_6I(desc, name, 312); \ | |
1101 | DO_TESTCASE_6I(desc, name, 321); | |
1102 | ||
1103 | #define DO_TESTCASE_6x6RW(desc, name) \ | |
1104 | DO_TESTCASE_6IRW(desc, name, 123); \ | |
1105 | DO_TESTCASE_6IRW(desc, name, 132); \ | |
1106 | DO_TESTCASE_6IRW(desc, name, 213); \ | |
1107 | DO_TESTCASE_6IRW(desc, name, 231); \ | |
1108 | DO_TESTCASE_6IRW(desc, name, 312); \ | |
1109 | DO_TESTCASE_6IRW(desc, name, 321); | |
1110 | ||
1111 | ||
1112 | void locking_selftest(void) | |
1113 | { | |
1114 | /* | |
1115 | * Got a locking failure before the selftest ran? | |
1116 | */ | |
1117 | if (!debug_locks) { | |
1118 | printk("----------------------------------\n"); | |
1119 | printk("| Locking API testsuite disabled |\n"); | |
1120 | printk("----------------------------------\n"); | |
1121 | return; | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Run the testsuite: | |
1126 | */ | |
1127 | printk("------------------------\n"); | |
1128 | printk("| Locking API testsuite:\n"); | |
1129 | printk("----------------------------------------------------------------------------\n"); | |
1130 | printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n"); | |
1131 | printk(" --------------------------------------------------------------------------\n"); | |
1132 | ||
1133 | init_shared_classes(); | |
1134 | debug_locks_silent = !debug_locks_verbose; | |
1135 | ||
6c9076ec | 1136 | DO_TESTCASE_6R("A-A deadlock", AA); |
cae2ed9a IM |
1137 | DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); |
1138 | DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA); | |
1139 | DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC); | |
1140 | DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA); | |
1141 | DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA); | |
1142 | DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA); | |
1143 | DO_TESTCASE_6("double unlock", double_unlock); | |
1144 | DO_TESTCASE_6("initialize held", init_held); | |
1145 | DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order); | |
1146 | ||
1147 | printk(" --------------------------------------------------------------------------\n"); | |
1148 | print_testname("recursive read-lock"); | |
1149 | printk(" |"); | |
1150 | dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); | |
1151 | printk(" |"); | |
1152 | dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); | |
1153 | printk("\n"); | |
1154 | ||
1155 | print_testname("recursive read-lock #2"); | |
1156 | printk(" |"); | |
6c9076ec | 1157 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
cae2ed9a IM |
1158 | printk(" |"); |
1159 | dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); | |
1160 | printk("\n"); | |
1161 | ||
1162 | print_testname("mixed read-write-lock"); | |
1163 | printk(" |"); | |
1164 | dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); | |
1165 | printk(" |"); | |
1166 | dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); | |
1167 | printk("\n"); | |
1168 | ||
1169 | print_testname("mixed write-read-lock"); | |
1170 | printk(" |"); | |
1171 | dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); | |
1172 | printk(" |"); | |
1173 | dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); | |
1174 | printk("\n"); | |
1175 | ||
1176 | printk(" --------------------------------------------------------------------------\n"); | |
1177 | ||
1178 | /* | |
1179 | * irq-context testcases: | |
1180 | */ | |
1181 | DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1); | |
1182 | DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A); | |
1183 | DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B); | |
1184 | DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3); | |
1185 | DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4); | |
1186 | DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion); | |
1187 | ||
1188 | DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion); | |
1189 | // DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2); | |
1190 | ||
1191 | if (unexpected_testcase_failures) { | |
1192 | printk("-----------------------------------------------------------------\n"); | |
1193 | debug_locks = 0; | |
1194 | printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", | |
1195 | unexpected_testcase_failures, testcase_total); | |
1196 | printk("-----------------------------------------------------------------\n"); | |
1197 | } else if (expected_testcase_failures && testcase_successes) { | |
1198 | printk("--------------------------------------------------------\n"); | |
1199 | printk("%3d out of %3d testcases failed, as expected. |\n", | |
1200 | expected_testcase_failures, testcase_total); | |
1201 | printk("----------------------------------------------------\n"); | |
1202 | debug_locks = 1; | |
1203 | } else if (expected_testcase_failures && !testcase_successes) { | |
1204 | printk("--------------------------------------------------------\n"); | |
1205 | printk("All %3d testcases failed, as expected. |\n", | |
1206 | expected_testcase_failures); | |
1207 | printk("----------------------------------------\n"); | |
1208 | debug_locks = 1; | |
1209 | } else { | |
1210 | printk("-------------------------------------------------------\n"); | |
1211 | printk("Good, all %3d testcases passed! |\n", | |
1212 | testcase_successes); | |
1213 | printk("---------------------------------\n"); | |
1214 | debug_locks = 1; | |
1215 | } | |
1216 | debug_locks_silent = 0; | |
1217 | } |