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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cae2ed9a IM |
2 | /* |
3 | * lib/locking-selftest.c | |
4 | * | |
5 | * Testsuite for various locking APIs: spinlocks, rwlocks, | |
6 | * mutexes and rw-semaphores. | |
7 | * | |
8 | * It is checking both false positives and false negatives. | |
9 | * | |
10 | * Started by Ingo Molnar: | |
11 | * | |
12 | * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> | |
13 | */ | |
14 | #include <linux/rwsem.h> | |
15 | #include <linux/mutex.h> | |
1b375dc3 | 16 | #include <linux/ww_mutex.h> |
cae2ed9a IM |
17 | #include <linux/sched.h> |
18 | #include <linux/delay.h> | |
fbb9ce95 | 19 | #include <linux/lockdep.h> |
cae2ed9a IM |
20 | #include <linux/spinlock.h> |
21 | #include <linux/kallsyms.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/debug_locks.h> | |
24 | #include <linux/irqflags.h> | |
018956d6 | 25 | #include <linux/rtmutex.h> |
cae2ed9a IM |
26 | |
27 | /* | |
28 | * Change this to 1 if you want to see the failure printouts: | |
29 | */ | |
30 | static unsigned int debug_locks_verbose; | |
e9181886 | 31 | unsigned int force_read_lock_recursive; |
cae2ed9a | 32 | |
08295b3b | 33 | static DEFINE_WD_CLASS(ww_lockdep); |
1de99445 | 34 | |
cae2ed9a IM |
35 | static int __init setup_debug_locks_verbose(char *str) |
36 | { | |
37 | get_option(&str, &debug_locks_verbose); | |
38 | ||
39 | return 1; | |
40 | } | |
41 | ||
42 | __setup("debug_locks_verbose=", setup_debug_locks_verbose); | |
43 | ||
44 | #define FAILURE 0 | |
45 | #define SUCCESS 1 | |
46 | ||
47 | #define LOCKTYPE_SPIN 0x1 | |
48 | #define LOCKTYPE_RWLOCK 0x2 | |
49 | #define LOCKTYPE_MUTEX 0x4 | |
50 | #define LOCKTYPE_RWSEM 0x8 | |
1de99445 | 51 | #define LOCKTYPE_WW 0x10 |
018956d6 | 52 | #define LOCKTYPE_RTMUTEX 0x20 |
1de99445 ML |
53 | |
54 | static struct ww_acquire_ctx t, t2; | |
f3cf139e | 55 | static struct ww_mutex o, o2, o3; |
cae2ed9a IM |
56 | |
57 | /* | |
58 | * Normal standalone locks, for the circular and irq-context | |
59 | * dependency tests: | |
60 | */ | |
9fb1b90c YZ |
61 | static DEFINE_RAW_SPINLOCK(lock_A); |
62 | static DEFINE_RAW_SPINLOCK(lock_B); | |
63 | static DEFINE_RAW_SPINLOCK(lock_C); | |
64 | static DEFINE_RAW_SPINLOCK(lock_D); | |
cae2ed9a IM |
65 | |
66 | static DEFINE_RWLOCK(rwlock_A); | |
67 | static DEFINE_RWLOCK(rwlock_B); | |
68 | static DEFINE_RWLOCK(rwlock_C); | |
69 | static DEFINE_RWLOCK(rwlock_D); | |
70 | ||
71 | static DEFINE_MUTEX(mutex_A); | |
72 | static DEFINE_MUTEX(mutex_B); | |
73 | static DEFINE_MUTEX(mutex_C); | |
74 | static DEFINE_MUTEX(mutex_D); | |
75 | ||
76 | static DECLARE_RWSEM(rwsem_A); | |
77 | static DECLARE_RWSEM(rwsem_B); | |
78 | static DECLARE_RWSEM(rwsem_C); | |
79 | static DECLARE_RWSEM(rwsem_D); | |
80 | ||
018956d6 PZ |
81 | #ifdef CONFIG_RT_MUTEXES |
82 | ||
83 | static DEFINE_RT_MUTEX(rtmutex_A); | |
84 | static DEFINE_RT_MUTEX(rtmutex_B); | |
85 | static DEFINE_RT_MUTEX(rtmutex_C); | |
86 | static DEFINE_RT_MUTEX(rtmutex_D); | |
87 | ||
88 | #endif | |
89 | ||
cae2ed9a IM |
90 | /* |
91 | * Locks that we initialize dynamically as well so that | |
92 | * e.g. X1 and X2 becomes two instances of the same class, | |
93 | * but X* and Y* are different classes. We do this so that | |
94 | * we do not trigger a real lockup: | |
95 | */ | |
9fb1b90c YZ |
96 | static DEFINE_RAW_SPINLOCK(lock_X1); |
97 | static DEFINE_RAW_SPINLOCK(lock_X2); | |
98 | static DEFINE_RAW_SPINLOCK(lock_Y1); | |
99 | static DEFINE_RAW_SPINLOCK(lock_Y2); | |
100 | static DEFINE_RAW_SPINLOCK(lock_Z1); | |
101 | static DEFINE_RAW_SPINLOCK(lock_Z2); | |
cae2ed9a IM |
102 | |
103 | static DEFINE_RWLOCK(rwlock_X1); | |
104 | static DEFINE_RWLOCK(rwlock_X2); | |
105 | static DEFINE_RWLOCK(rwlock_Y1); | |
106 | static DEFINE_RWLOCK(rwlock_Y2); | |
107 | static DEFINE_RWLOCK(rwlock_Z1); | |
108 | static DEFINE_RWLOCK(rwlock_Z2); | |
109 | ||
110 | static DEFINE_MUTEX(mutex_X1); | |
111 | static DEFINE_MUTEX(mutex_X2); | |
112 | static DEFINE_MUTEX(mutex_Y1); | |
113 | static DEFINE_MUTEX(mutex_Y2); | |
114 | static DEFINE_MUTEX(mutex_Z1); | |
115 | static DEFINE_MUTEX(mutex_Z2); | |
116 | ||
117 | static DECLARE_RWSEM(rwsem_X1); | |
118 | static DECLARE_RWSEM(rwsem_X2); | |
119 | static DECLARE_RWSEM(rwsem_Y1); | |
120 | static DECLARE_RWSEM(rwsem_Y2); | |
121 | static DECLARE_RWSEM(rwsem_Z1); | |
122 | static DECLARE_RWSEM(rwsem_Z2); | |
123 | ||
018956d6 PZ |
124 | #ifdef CONFIG_RT_MUTEXES |
125 | ||
126 | static DEFINE_RT_MUTEX(rtmutex_X1); | |
127 | static DEFINE_RT_MUTEX(rtmutex_X2); | |
128 | static DEFINE_RT_MUTEX(rtmutex_Y1); | |
129 | static DEFINE_RT_MUTEX(rtmutex_Y2); | |
130 | static DEFINE_RT_MUTEX(rtmutex_Z1); | |
131 | static DEFINE_RT_MUTEX(rtmutex_Z2); | |
132 | ||
133 | #endif | |
134 | ||
cae2ed9a IM |
135 | /* |
136 | * non-inlined runtime initializers, to let separate locks share | |
137 | * the same lock-class: | |
138 | */ | |
139 | #define INIT_CLASS_FUNC(class) \ | |
140 | static noinline void \ | |
9fb1b90c YZ |
141 | init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \ |
142 | struct mutex *mutex, struct rw_semaphore *rwsem)\ | |
cae2ed9a | 143 | { \ |
9fb1b90c | 144 | raw_spin_lock_init(lock); \ |
cae2ed9a IM |
145 | rwlock_init(rwlock); \ |
146 | mutex_init(mutex); \ | |
147 | init_rwsem(rwsem); \ | |
148 | } | |
149 | ||
150 | INIT_CLASS_FUNC(X) | |
151 | INIT_CLASS_FUNC(Y) | |
152 | INIT_CLASS_FUNC(Z) | |
153 | ||
154 | static void init_shared_classes(void) | |
155 | { | |
018956d6 PZ |
156 | #ifdef CONFIG_RT_MUTEXES |
157 | static struct lock_class_key rt_X, rt_Y, rt_Z; | |
158 | ||
159 | __rt_mutex_init(&rtmutex_X1, __func__, &rt_X); | |
160 | __rt_mutex_init(&rtmutex_X2, __func__, &rt_X); | |
161 | __rt_mutex_init(&rtmutex_Y1, __func__, &rt_Y); | |
162 | __rt_mutex_init(&rtmutex_Y2, __func__, &rt_Y); | |
163 | __rt_mutex_init(&rtmutex_Z1, __func__, &rt_Z); | |
164 | __rt_mutex_init(&rtmutex_Z2, __func__, &rt_Z); | |
165 | #endif | |
166 | ||
cae2ed9a IM |
167 | init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1); |
168 | init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2); | |
169 | ||
170 | init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1); | |
171 | init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2); | |
172 | ||
173 | init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1); | |
174 | init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2); | |
175 | } | |
176 | ||
177 | /* | |
178 | * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests. | |
179 | * The following functions use a lock from a simulated hardirq/softirq | |
180 | * context, causing the locks to be marked as hardirq-safe/softirq-safe: | |
181 | */ | |
182 | ||
183 | #define HARDIRQ_DISABLE local_irq_disable | |
184 | #define HARDIRQ_ENABLE local_irq_enable | |
185 | ||
186 | #define HARDIRQ_ENTER() \ | |
187 | local_irq_disable(); \ | |
ba9f207c | 188 | __irq_enter(); \ |
cae2ed9a IM |
189 | WARN_ON(!in_irq()); |
190 | ||
191 | #define HARDIRQ_EXIT() \ | |
192 | __irq_exit(); \ | |
193 | local_irq_enable(); | |
194 | ||
195 | #define SOFTIRQ_DISABLE local_bh_disable | |
196 | #define SOFTIRQ_ENABLE local_bh_enable | |
197 | ||
198 | #define SOFTIRQ_ENTER() \ | |
199 | local_bh_disable(); \ | |
200 | local_irq_disable(); \ | |
d820ac4c | 201 | lockdep_softirq_enter(); \ |
cae2ed9a IM |
202 | WARN_ON(!in_softirq()); |
203 | ||
204 | #define SOFTIRQ_EXIT() \ | |
d820ac4c | 205 | lockdep_softirq_exit(); \ |
cae2ed9a IM |
206 | local_irq_enable(); \ |
207 | local_bh_enable(); | |
208 | ||
209 | /* | |
210 | * Shortcuts for lock/unlock API variants, to keep | |
211 | * the testcases compact: | |
212 | */ | |
9fb1b90c YZ |
213 | #define L(x) raw_spin_lock(&lock_##x) |
214 | #define U(x) raw_spin_unlock(&lock_##x) | |
cae2ed9a | 215 | #define LU(x) L(x); U(x) |
9fb1b90c | 216 | #define SI(x) raw_spin_lock_init(&lock_##x) |
cae2ed9a IM |
217 | |
218 | #define WL(x) write_lock(&rwlock_##x) | |
219 | #define WU(x) write_unlock(&rwlock_##x) | |
220 | #define WLU(x) WL(x); WU(x) | |
221 | ||
222 | #define RL(x) read_lock(&rwlock_##x) | |
223 | #define RU(x) read_unlock(&rwlock_##x) | |
224 | #define RLU(x) RL(x); RU(x) | |
225 | #define RWI(x) rwlock_init(&rwlock_##x) | |
226 | ||
227 | #define ML(x) mutex_lock(&mutex_##x) | |
228 | #define MU(x) mutex_unlock(&mutex_##x) | |
229 | #define MI(x) mutex_init(&mutex_##x) | |
230 | ||
018956d6 PZ |
231 | #define RTL(x) rt_mutex_lock(&rtmutex_##x) |
232 | #define RTU(x) rt_mutex_unlock(&rtmutex_##x) | |
233 | #define RTI(x) rt_mutex_init(&rtmutex_##x) | |
234 | ||
cae2ed9a IM |
235 | #define WSL(x) down_write(&rwsem_##x) |
236 | #define WSU(x) up_write(&rwsem_##x) | |
237 | ||
238 | #define RSL(x) down_read(&rwsem_##x) | |
239 | #define RSU(x) up_read(&rwsem_##x) | |
240 | #define RWSI(x) init_rwsem(&rwsem_##x) | |
241 | ||
1de99445 ML |
242 | #ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH |
243 | #define WWAI(x) ww_acquire_init(x, &ww_lockdep) | |
244 | #else | |
245 | #define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0) | |
246 | #endif | |
247 | #define WWAD(x) ww_acquire_done(x) | |
248 | #define WWAF(x) ww_acquire_fini(x) | |
249 | ||
250 | #define WWL(x, c) ww_mutex_lock(x, c) | |
251 | #define WWT(x) ww_mutex_trylock(x) | |
252 | #define WWL1(x) ww_mutex_lock(x, NULL) | |
253 | #define WWU(x) ww_mutex_unlock(x) | |
254 | ||
255 | ||
cae2ed9a IM |
256 | #define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x) |
257 | ||
258 | /* | |
259 | * Generate different permutations of the same testcase, using | |
260 | * the same basic lock-dependency/state events: | |
261 | */ | |
262 | ||
263 | #define GENERATE_TESTCASE(name) \ | |
264 | \ | |
265 | static void name(void) { E(); } | |
266 | ||
267 | #define GENERATE_PERMUTATIONS_2_EVENTS(name) \ | |
268 | \ | |
269 | static void name##_12(void) { E1(); E2(); } \ | |
270 | static void name##_21(void) { E2(); E1(); } | |
271 | ||
272 | #define GENERATE_PERMUTATIONS_3_EVENTS(name) \ | |
273 | \ | |
274 | static void name##_123(void) { E1(); E2(); E3(); } \ | |
275 | static void name##_132(void) { E1(); E3(); E2(); } \ | |
276 | static void name##_213(void) { E2(); E1(); E3(); } \ | |
277 | static void name##_231(void) { E2(); E3(); E1(); } \ | |
278 | static void name##_312(void) { E3(); E1(); E2(); } \ | |
279 | static void name##_321(void) { E3(); E2(); E1(); } | |
280 | ||
281 | /* | |
282 | * AA deadlock: | |
283 | */ | |
284 | ||
285 | #define E() \ | |
286 | \ | |
287 | LOCK(X1); \ | |
288 | LOCK(X2); /* this one should fail */ | |
289 | ||
290 | /* | |
291 | * 6 testcases: | |
292 | */ | |
293 | #include "locking-selftest-spin.h" | |
294 | GENERATE_TESTCASE(AA_spin) | |
295 | #include "locking-selftest-wlock.h" | |
296 | GENERATE_TESTCASE(AA_wlock) | |
297 | #include "locking-selftest-rlock.h" | |
298 | GENERATE_TESTCASE(AA_rlock) | |
299 | #include "locking-selftest-mutex.h" | |
300 | GENERATE_TESTCASE(AA_mutex) | |
301 | #include "locking-selftest-wsem.h" | |
302 | GENERATE_TESTCASE(AA_wsem) | |
303 | #include "locking-selftest-rsem.h" | |
304 | GENERATE_TESTCASE(AA_rsem) | |
305 | ||
018956d6 PZ |
306 | #ifdef CONFIG_RT_MUTEXES |
307 | #include "locking-selftest-rtmutex.h" | |
308 | GENERATE_TESTCASE(AA_rtmutex); | |
309 | #endif | |
310 | ||
cae2ed9a IM |
311 | #undef E |
312 | ||
313 | /* | |
314 | * Special-case for read-locking, they are | |
6c9076ec | 315 | * allowed to recurse on the same lock class: |
cae2ed9a IM |
316 | */ |
317 | static void rlock_AA1(void) | |
318 | { | |
319 | RL(X1); | |
320 | RL(X1); // this one should NOT fail | |
321 | } | |
322 | ||
323 | static void rlock_AA1B(void) | |
324 | { | |
325 | RL(X1); | |
6c9076ec | 326 | RL(X2); // this one should NOT fail |
cae2ed9a IM |
327 | } |
328 | ||
329 | static void rsem_AA1(void) | |
330 | { | |
331 | RSL(X1); | |
332 | RSL(X1); // this one should fail | |
333 | } | |
334 | ||
335 | static void rsem_AA1B(void) | |
336 | { | |
337 | RSL(X1); | |
338 | RSL(X2); // this one should fail | |
339 | } | |
340 | /* | |
341 | * The mixing of read and write locks is not allowed: | |
342 | */ | |
343 | static void rlock_AA2(void) | |
344 | { | |
345 | RL(X1); | |
346 | WL(X2); // this one should fail | |
347 | } | |
348 | ||
349 | static void rsem_AA2(void) | |
350 | { | |
351 | RSL(X1); | |
352 | WSL(X2); // this one should fail | |
353 | } | |
354 | ||
355 | static void rlock_AA3(void) | |
356 | { | |
357 | WL(X1); | |
358 | RL(X2); // this one should fail | |
359 | } | |
360 | ||
361 | static void rsem_AA3(void) | |
362 | { | |
363 | WSL(X1); | |
364 | RSL(X2); // this one should fail | |
365 | } | |
366 | ||
e9149858 PZ |
367 | /* |
368 | * read_lock(A) | |
369 | * spin_lock(B) | |
370 | * spin_lock(B) | |
371 | * write_lock(A) | |
372 | */ | |
373 | static void rlock_ABBA1(void) | |
374 | { | |
375 | RL(X1); | |
376 | L(Y1); | |
377 | U(Y1); | |
378 | RU(X1); | |
379 | ||
380 | L(Y1); | |
381 | WL(X1); | |
382 | WU(X1); | |
383 | U(Y1); // should fail | |
384 | } | |
385 | ||
386 | static void rwsem_ABBA1(void) | |
387 | { | |
388 | RSL(X1); | |
389 | ML(Y1); | |
390 | MU(Y1); | |
391 | RSU(X1); | |
392 | ||
393 | ML(Y1); | |
394 | WSL(X1); | |
395 | WSU(X1); | |
396 | MU(Y1); // should fail | |
397 | } | |
398 | ||
d4f200e5 BF |
399 | /* |
400 | * read_lock(A) | |
401 | * spin_lock(B) | |
402 | * spin_lock(B) | |
403 | * write_lock(A) | |
404 | * | |
405 | * This test case is aimed at poking whether the chain cache prevents us from | |
406 | * detecting a read-lock/lock-write deadlock: if the chain cache doesn't differ | |
407 | * read/write locks, the following case may happen | |
408 | * | |
409 | * { read_lock(A)->lock(B) dependency exists } | |
410 | * | |
411 | * P0: | |
412 | * lock(B); | |
413 | * read_lock(A); | |
414 | * | |
415 | * { Not a deadlock, B -> A is added in the chain cache } | |
416 | * | |
417 | * P1: | |
418 | * lock(B); | |
419 | * write_lock(A); | |
420 | * | |
421 | * { B->A found in chain cache, not reported as a deadlock } | |
422 | * | |
423 | */ | |
424 | static void rlock_chaincache_ABBA1(void) | |
425 | { | |
426 | RL(X1); | |
427 | L(Y1); | |
428 | U(Y1); | |
429 | RU(X1); | |
430 | ||
431 | L(Y1); | |
432 | RL(X1); | |
433 | RU(X1); | |
434 | U(Y1); | |
435 | ||
436 | L(Y1); | |
437 | WL(X1); | |
438 | WU(X1); | |
439 | U(Y1); // should fail | |
440 | } | |
441 | ||
e9149858 PZ |
442 | /* |
443 | * read_lock(A) | |
444 | * spin_lock(B) | |
445 | * spin_lock(B) | |
446 | * read_lock(A) | |
447 | */ | |
448 | static void rlock_ABBA2(void) | |
449 | { | |
450 | RL(X1); | |
451 | L(Y1); | |
452 | U(Y1); | |
453 | RU(X1); | |
454 | ||
455 | L(Y1); | |
456 | RL(X1); | |
457 | RU(X1); | |
458 | U(Y1); // should NOT fail | |
459 | } | |
460 | ||
461 | static void rwsem_ABBA2(void) | |
462 | { | |
463 | RSL(X1); | |
464 | ML(Y1); | |
465 | MU(Y1); | |
466 | RSU(X1); | |
467 | ||
468 | ML(Y1); | |
469 | RSL(X1); | |
470 | RSU(X1); | |
471 | MU(Y1); // should fail | |
472 | } | |
473 | ||
474 | ||
475 | /* | |
476 | * write_lock(A) | |
477 | * spin_lock(B) | |
478 | * spin_lock(B) | |
479 | * write_lock(A) | |
480 | */ | |
481 | static void rlock_ABBA3(void) | |
482 | { | |
483 | WL(X1); | |
484 | L(Y1); | |
485 | U(Y1); | |
486 | WU(X1); | |
487 | ||
488 | L(Y1); | |
489 | WL(X1); | |
490 | WU(X1); | |
491 | U(Y1); // should fail | |
492 | } | |
493 | ||
494 | static void rwsem_ABBA3(void) | |
495 | { | |
496 | WSL(X1); | |
497 | ML(Y1); | |
498 | MU(Y1); | |
499 | WSU(X1); | |
500 | ||
501 | ML(Y1); | |
502 | WSL(X1); | |
503 | WSU(X1); | |
504 | MU(Y1); // should fail | |
505 | } | |
506 | ||
cae2ed9a IM |
507 | /* |
508 | * ABBA deadlock: | |
509 | */ | |
510 | ||
511 | #define E() \ | |
512 | \ | |
513 | LOCK_UNLOCK_2(A, B); \ | |
514 | LOCK_UNLOCK_2(B, A); /* fail */ | |
515 | ||
516 | /* | |
517 | * 6 testcases: | |
518 | */ | |
519 | #include "locking-selftest-spin.h" | |
520 | GENERATE_TESTCASE(ABBA_spin) | |
521 | #include "locking-selftest-wlock.h" | |
522 | GENERATE_TESTCASE(ABBA_wlock) | |
523 | #include "locking-selftest-rlock.h" | |
524 | GENERATE_TESTCASE(ABBA_rlock) | |
525 | #include "locking-selftest-mutex.h" | |
526 | GENERATE_TESTCASE(ABBA_mutex) | |
527 | #include "locking-selftest-wsem.h" | |
528 | GENERATE_TESTCASE(ABBA_wsem) | |
529 | #include "locking-selftest-rsem.h" | |
530 | GENERATE_TESTCASE(ABBA_rsem) | |
531 | ||
018956d6 PZ |
532 | #ifdef CONFIG_RT_MUTEXES |
533 | #include "locking-selftest-rtmutex.h" | |
534 | GENERATE_TESTCASE(ABBA_rtmutex); | |
535 | #endif | |
536 | ||
cae2ed9a IM |
537 | #undef E |
538 | ||
539 | /* | |
540 | * AB BC CA deadlock: | |
541 | */ | |
542 | ||
543 | #define E() \ | |
544 | \ | |
545 | LOCK_UNLOCK_2(A, B); \ | |
546 | LOCK_UNLOCK_2(B, C); \ | |
547 | LOCK_UNLOCK_2(C, A); /* fail */ | |
548 | ||
549 | /* | |
550 | * 6 testcases: | |
551 | */ | |
552 | #include "locking-selftest-spin.h" | |
553 | GENERATE_TESTCASE(ABBCCA_spin) | |
554 | #include "locking-selftest-wlock.h" | |
555 | GENERATE_TESTCASE(ABBCCA_wlock) | |
556 | #include "locking-selftest-rlock.h" | |
557 | GENERATE_TESTCASE(ABBCCA_rlock) | |
558 | #include "locking-selftest-mutex.h" | |
559 | GENERATE_TESTCASE(ABBCCA_mutex) | |
560 | #include "locking-selftest-wsem.h" | |
561 | GENERATE_TESTCASE(ABBCCA_wsem) | |
562 | #include "locking-selftest-rsem.h" | |
563 | GENERATE_TESTCASE(ABBCCA_rsem) | |
564 | ||
018956d6 PZ |
565 | #ifdef CONFIG_RT_MUTEXES |
566 | #include "locking-selftest-rtmutex.h" | |
567 | GENERATE_TESTCASE(ABBCCA_rtmutex); | |
568 | #endif | |
569 | ||
cae2ed9a IM |
570 | #undef E |
571 | ||
572 | /* | |
573 | * AB CA BC deadlock: | |
574 | */ | |
575 | ||
576 | #define E() \ | |
577 | \ | |
578 | LOCK_UNLOCK_2(A, B); \ | |
579 | LOCK_UNLOCK_2(C, A); \ | |
580 | LOCK_UNLOCK_2(B, C); /* fail */ | |
581 | ||
582 | /* | |
583 | * 6 testcases: | |
584 | */ | |
585 | #include "locking-selftest-spin.h" | |
586 | GENERATE_TESTCASE(ABCABC_spin) | |
587 | #include "locking-selftest-wlock.h" | |
588 | GENERATE_TESTCASE(ABCABC_wlock) | |
589 | #include "locking-selftest-rlock.h" | |
590 | GENERATE_TESTCASE(ABCABC_rlock) | |
591 | #include "locking-selftest-mutex.h" | |
592 | GENERATE_TESTCASE(ABCABC_mutex) | |
593 | #include "locking-selftest-wsem.h" | |
594 | GENERATE_TESTCASE(ABCABC_wsem) | |
595 | #include "locking-selftest-rsem.h" | |
596 | GENERATE_TESTCASE(ABCABC_rsem) | |
597 | ||
018956d6 PZ |
598 | #ifdef CONFIG_RT_MUTEXES |
599 | #include "locking-selftest-rtmutex.h" | |
600 | GENERATE_TESTCASE(ABCABC_rtmutex); | |
601 | #endif | |
602 | ||
cae2ed9a IM |
603 | #undef E |
604 | ||
605 | /* | |
606 | * AB BC CD DA deadlock: | |
607 | */ | |
608 | ||
609 | #define E() \ | |
610 | \ | |
611 | LOCK_UNLOCK_2(A, B); \ | |
612 | LOCK_UNLOCK_2(B, C); \ | |
613 | LOCK_UNLOCK_2(C, D); \ | |
614 | LOCK_UNLOCK_2(D, A); /* fail */ | |
615 | ||
616 | /* | |
617 | * 6 testcases: | |
618 | */ | |
619 | #include "locking-selftest-spin.h" | |
620 | GENERATE_TESTCASE(ABBCCDDA_spin) | |
621 | #include "locking-selftest-wlock.h" | |
622 | GENERATE_TESTCASE(ABBCCDDA_wlock) | |
623 | #include "locking-selftest-rlock.h" | |
624 | GENERATE_TESTCASE(ABBCCDDA_rlock) | |
625 | #include "locking-selftest-mutex.h" | |
626 | GENERATE_TESTCASE(ABBCCDDA_mutex) | |
627 | #include "locking-selftest-wsem.h" | |
628 | GENERATE_TESTCASE(ABBCCDDA_wsem) | |
629 | #include "locking-selftest-rsem.h" | |
630 | GENERATE_TESTCASE(ABBCCDDA_rsem) | |
631 | ||
018956d6 PZ |
632 | #ifdef CONFIG_RT_MUTEXES |
633 | #include "locking-selftest-rtmutex.h" | |
634 | GENERATE_TESTCASE(ABBCCDDA_rtmutex); | |
635 | #endif | |
636 | ||
cae2ed9a IM |
637 | #undef E |
638 | ||
639 | /* | |
640 | * AB CD BD DA deadlock: | |
641 | */ | |
642 | #define E() \ | |
643 | \ | |
644 | LOCK_UNLOCK_2(A, B); \ | |
645 | LOCK_UNLOCK_2(C, D); \ | |
646 | LOCK_UNLOCK_2(B, D); \ | |
647 | LOCK_UNLOCK_2(D, A); /* fail */ | |
648 | ||
649 | /* | |
650 | * 6 testcases: | |
651 | */ | |
652 | #include "locking-selftest-spin.h" | |
653 | GENERATE_TESTCASE(ABCDBDDA_spin) | |
654 | #include "locking-selftest-wlock.h" | |
655 | GENERATE_TESTCASE(ABCDBDDA_wlock) | |
656 | #include "locking-selftest-rlock.h" | |
657 | GENERATE_TESTCASE(ABCDBDDA_rlock) | |
658 | #include "locking-selftest-mutex.h" | |
659 | GENERATE_TESTCASE(ABCDBDDA_mutex) | |
660 | #include "locking-selftest-wsem.h" | |
661 | GENERATE_TESTCASE(ABCDBDDA_wsem) | |
662 | #include "locking-selftest-rsem.h" | |
663 | GENERATE_TESTCASE(ABCDBDDA_rsem) | |
664 | ||
018956d6 PZ |
665 | #ifdef CONFIG_RT_MUTEXES |
666 | #include "locking-selftest-rtmutex.h" | |
667 | GENERATE_TESTCASE(ABCDBDDA_rtmutex); | |
668 | #endif | |
669 | ||
cae2ed9a IM |
670 | #undef E |
671 | ||
672 | /* | |
673 | * AB CD BC DA deadlock: | |
674 | */ | |
675 | #define E() \ | |
676 | \ | |
677 | LOCK_UNLOCK_2(A, B); \ | |
678 | LOCK_UNLOCK_2(C, D); \ | |
679 | LOCK_UNLOCK_2(B, C); \ | |
680 | LOCK_UNLOCK_2(D, A); /* fail */ | |
681 | ||
682 | /* | |
683 | * 6 testcases: | |
684 | */ | |
685 | #include "locking-selftest-spin.h" | |
686 | GENERATE_TESTCASE(ABCDBCDA_spin) | |
687 | #include "locking-selftest-wlock.h" | |
688 | GENERATE_TESTCASE(ABCDBCDA_wlock) | |
689 | #include "locking-selftest-rlock.h" | |
690 | GENERATE_TESTCASE(ABCDBCDA_rlock) | |
691 | #include "locking-selftest-mutex.h" | |
692 | GENERATE_TESTCASE(ABCDBCDA_mutex) | |
693 | #include "locking-selftest-wsem.h" | |
694 | GENERATE_TESTCASE(ABCDBCDA_wsem) | |
695 | #include "locking-selftest-rsem.h" | |
696 | GENERATE_TESTCASE(ABCDBCDA_rsem) | |
697 | ||
018956d6 PZ |
698 | #ifdef CONFIG_RT_MUTEXES |
699 | #include "locking-selftest-rtmutex.h" | |
700 | GENERATE_TESTCASE(ABCDBCDA_rtmutex); | |
701 | #endif | |
702 | ||
cae2ed9a IM |
703 | #undef E |
704 | ||
705 | /* | |
706 | * Double unlock: | |
707 | */ | |
708 | #define E() \ | |
709 | \ | |
710 | LOCK(A); \ | |
711 | UNLOCK(A); \ | |
712 | UNLOCK(A); /* fail */ | |
713 | ||
714 | /* | |
715 | * 6 testcases: | |
716 | */ | |
717 | #include "locking-selftest-spin.h" | |
718 | GENERATE_TESTCASE(double_unlock_spin) | |
719 | #include "locking-selftest-wlock.h" | |
720 | GENERATE_TESTCASE(double_unlock_wlock) | |
721 | #include "locking-selftest-rlock.h" | |
722 | GENERATE_TESTCASE(double_unlock_rlock) | |
723 | #include "locking-selftest-mutex.h" | |
724 | GENERATE_TESTCASE(double_unlock_mutex) | |
725 | #include "locking-selftest-wsem.h" | |
726 | GENERATE_TESTCASE(double_unlock_wsem) | |
727 | #include "locking-selftest-rsem.h" | |
728 | GENERATE_TESTCASE(double_unlock_rsem) | |
729 | ||
018956d6 PZ |
730 | #ifdef CONFIG_RT_MUTEXES |
731 | #include "locking-selftest-rtmutex.h" | |
732 | GENERATE_TESTCASE(double_unlock_rtmutex); | |
733 | #endif | |
734 | ||
cae2ed9a IM |
735 | #undef E |
736 | ||
cae2ed9a IM |
737 | /* |
738 | * initializing a held lock: | |
739 | */ | |
740 | #define E() \ | |
741 | \ | |
742 | LOCK(A); \ | |
743 | INIT(A); /* fail */ | |
744 | ||
745 | /* | |
746 | * 6 testcases: | |
747 | */ | |
748 | #include "locking-selftest-spin.h" | |
749 | GENERATE_TESTCASE(init_held_spin) | |
750 | #include "locking-selftest-wlock.h" | |
751 | GENERATE_TESTCASE(init_held_wlock) | |
752 | #include "locking-selftest-rlock.h" | |
753 | GENERATE_TESTCASE(init_held_rlock) | |
754 | #include "locking-selftest-mutex.h" | |
755 | GENERATE_TESTCASE(init_held_mutex) | |
756 | #include "locking-selftest-wsem.h" | |
757 | GENERATE_TESTCASE(init_held_wsem) | |
758 | #include "locking-selftest-rsem.h" | |
759 | GENERATE_TESTCASE(init_held_rsem) | |
760 | ||
018956d6 PZ |
761 | #ifdef CONFIG_RT_MUTEXES |
762 | #include "locking-selftest-rtmutex.h" | |
763 | GENERATE_TESTCASE(init_held_rtmutex); | |
764 | #endif | |
765 | ||
cae2ed9a IM |
766 | #undef E |
767 | ||
768 | /* | |
769 | * locking an irq-safe lock with irqs enabled: | |
770 | */ | |
771 | #define E1() \ | |
772 | \ | |
773 | IRQ_ENTER(); \ | |
774 | LOCK(A); \ | |
775 | UNLOCK(A); \ | |
776 | IRQ_EXIT(); | |
777 | ||
778 | #define E2() \ | |
779 | \ | |
780 | LOCK(A); \ | |
781 | UNLOCK(A); | |
782 | ||
783 | /* | |
784 | * Generate 24 testcases: | |
785 | */ | |
786 | #include "locking-selftest-spin-hardirq.h" | |
787 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) | |
788 | ||
789 | #include "locking-selftest-rlock-hardirq.h" | |
790 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) | |
791 | ||
792 | #include "locking-selftest-wlock-hardirq.h" | |
793 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock) | |
794 | ||
795 | #include "locking-selftest-spin-softirq.h" | |
796 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin) | |
797 | ||
798 | #include "locking-selftest-rlock-softirq.h" | |
799 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) | |
800 | ||
801 | #include "locking-selftest-wlock-softirq.h" | |
802 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) | |
803 | ||
804 | #undef E1 | |
805 | #undef E2 | |
806 | ||
807 | /* | |
808 | * Enabling hardirqs with a softirq-safe lock held: | |
809 | */ | |
810 | #define E1() \ | |
811 | \ | |
812 | SOFTIRQ_ENTER(); \ | |
813 | LOCK(A); \ | |
814 | UNLOCK(A); \ | |
815 | SOFTIRQ_EXIT(); | |
816 | ||
817 | #define E2() \ | |
818 | \ | |
819 | HARDIRQ_DISABLE(); \ | |
820 | LOCK(A); \ | |
821 | HARDIRQ_ENABLE(); \ | |
822 | UNLOCK(A); | |
823 | ||
824 | /* | |
825 | * Generate 12 testcases: | |
826 | */ | |
827 | #include "locking-selftest-spin.h" | |
828 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin) | |
829 | ||
830 | #include "locking-selftest-wlock.h" | |
831 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock) | |
832 | ||
833 | #include "locking-selftest-rlock.h" | |
834 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) | |
835 | ||
836 | #undef E1 | |
837 | #undef E2 | |
838 | ||
839 | /* | |
840 | * Enabling irqs with an irq-safe lock held: | |
841 | */ | |
842 | #define E1() \ | |
843 | \ | |
844 | IRQ_ENTER(); \ | |
845 | LOCK(A); \ | |
846 | UNLOCK(A); \ | |
847 | IRQ_EXIT(); | |
848 | ||
849 | #define E2() \ | |
850 | \ | |
851 | IRQ_DISABLE(); \ | |
852 | LOCK(A); \ | |
853 | IRQ_ENABLE(); \ | |
854 | UNLOCK(A); | |
855 | ||
856 | /* | |
857 | * Generate 24 testcases: | |
858 | */ | |
859 | #include "locking-selftest-spin-hardirq.h" | |
860 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) | |
861 | ||
862 | #include "locking-selftest-rlock-hardirq.h" | |
863 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) | |
864 | ||
865 | #include "locking-selftest-wlock-hardirq.h" | |
866 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock) | |
867 | ||
868 | #include "locking-selftest-spin-softirq.h" | |
869 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin) | |
870 | ||
871 | #include "locking-selftest-rlock-softirq.h" | |
872 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) | |
873 | ||
874 | #include "locking-selftest-wlock-softirq.h" | |
875 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) | |
876 | ||
877 | #undef E1 | |
878 | #undef E2 | |
879 | ||
880 | /* | |
881 | * Acquiring a irq-unsafe lock while holding an irq-safe-lock: | |
882 | */ | |
883 | #define E1() \ | |
884 | \ | |
885 | LOCK(A); \ | |
886 | LOCK(B); \ | |
887 | UNLOCK(B); \ | |
888 | UNLOCK(A); \ | |
889 | ||
890 | #define E2() \ | |
891 | \ | |
892 | LOCK(B); \ | |
893 | UNLOCK(B); | |
894 | ||
895 | #define E3() \ | |
896 | \ | |
897 | IRQ_ENTER(); \ | |
898 | LOCK(A); \ | |
899 | UNLOCK(A); \ | |
900 | IRQ_EXIT(); | |
901 | ||
902 | /* | |
903 | * Generate 36 testcases: | |
904 | */ | |
905 | #include "locking-selftest-spin-hardirq.h" | |
906 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) | |
907 | ||
908 | #include "locking-selftest-rlock-hardirq.h" | |
909 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) | |
910 | ||
911 | #include "locking-selftest-wlock-hardirq.h" | |
912 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock) | |
913 | ||
914 | #include "locking-selftest-spin-softirq.h" | |
915 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin) | |
916 | ||
917 | #include "locking-selftest-rlock-softirq.h" | |
918 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) | |
919 | ||
920 | #include "locking-selftest-wlock-softirq.h" | |
921 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) | |
922 | ||
923 | #undef E1 | |
924 | #undef E2 | |
925 | #undef E3 | |
926 | ||
927 | /* | |
928 | * If a lock turns into softirq-safe, but earlier it took | |
929 | * a softirq-unsafe lock: | |
930 | */ | |
931 | ||
932 | #define E1() \ | |
933 | IRQ_DISABLE(); \ | |
934 | LOCK(A); \ | |
935 | LOCK(B); \ | |
936 | UNLOCK(B); \ | |
937 | UNLOCK(A); \ | |
938 | IRQ_ENABLE(); | |
939 | ||
940 | #define E2() \ | |
941 | LOCK(B); \ | |
942 | UNLOCK(B); | |
943 | ||
944 | #define E3() \ | |
945 | IRQ_ENTER(); \ | |
946 | LOCK(A); \ | |
947 | UNLOCK(A); \ | |
948 | IRQ_EXIT(); | |
949 | ||
950 | /* | |
951 | * Generate 36 testcases: | |
952 | */ | |
953 | #include "locking-selftest-spin-hardirq.h" | |
954 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) | |
955 | ||
956 | #include "locking-selftest-rlock-hardirq.h" | |
957 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) | |
958 | ||
959 | #include "locking-selftest-wlock-hardirq.h" | |
960 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock) | |
961 | ||
962 | #include "locking-selftest-spin-softirq.h" | |
963 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin) | |
964 | ||
965 | #include "locking-selftest-rlock-softirq.h" | |
966 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) | |
967 | ||
968 | #include "locking-selftest-wlock-softirq.h" | |
969 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) | |
970 | ||
971 | #undef E1 | |
972 | #undef E2 | |
973 | #undef E3 | |
974 | ||
975 | /* | |
976 | * read-lock / write-lock irq inversion. | |
977 | * | |
978 | * Deadlock scenario: | |
979 | * | |
980 | * CPU#1 is at #1, i.e. it has write-locked A, but has not | |
981 | * taken B yet. | |
982 | * | |
983 | * CPU#2 is at #2, i.e. it has locked B. | |
984 | * | |
985 | * Hardirq hits CPU#2 at point #2 and is trying to read-lock A. | |
986 | * | |
987 | * The deadlock occurs because CPU#1 will spin on B, and CPU#2 | |
988 | * will spin on A. | |
989 | */ | |
990 | ||
991 | #define E1() \ | |
992 | \ | |
993 | IRQ_DISABLE(); \ | |
994 | WL(A); \ | |
995 | LOCK(B); \ | |
996 | UNLOCK(B); \ | |
997 | WU(A); \ | |
998 | IRQ_ENABLE(); | |
999 | ||
1000 | #define E2() \ | |
1001 | \ | |
1002 | LOCK(B); \ | |
1003 | UNLOCK(B); | |
1004 | ||
1005 | #define E3() \ | |
1006 | \ | |
1007 | IRQ_ENTER(); \ | |
1008 | RL(A); \ | |
1009 | RU(A); \ | |
1010 | IRQ_EXIT(); | |
1011 | ||
1012 | /* | |
1013 | * Generate 36 testcases: | |
1014 | */ | |
1015 | #include "locking-selftest-spin-hardirq.h" | |
1016 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin) | |
1017 | ||
1018 | #include "locking-selftest-rlock-hardirq.h" | |
1019 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock) | |
1020 | ||
1021 | #include "locking-selftest-wlock-hardirq.h" | |
1022 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock) | |
1023 | ||
1024 | #include "locking-selftest-spin-softirq.h" | |
1025 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin) | |
1026 | ||
1027 | #include "locking-selftest-rlock-softirq.h" | |
1028 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock) | |
1029 | ||
1030 | #include "locking-selftest-wlock-softirq.h" | |
1031 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) | |
1032 | ||
1033 | #undef E1 | |
1034 | #undef E2 | |
1035 | #undef E3 | |
1036 | ||
8ef7ca75 BF |
1037 | /* |
1038 | * write-read / write-read / write-read deadlock even if read is recursive | |
1039 | */ | |
1040 | ||
1041 | #define E1() \ | |
1042 | \ | |
1043 | WL(X1); \ | |
1044 | RL(Y1); \ | |
1045 | RU(Y1); \ | |
1046 | WU(X1); | |
1047 | ||
1048 | #define E2() \ | |
1049 | \ | |
1050 | WL(Y1); \ | |
1051 | RL(Z1); \ | |
1052 | RU(Z1); \ | |
1053 | WU(Y1); | |
1054 | ||
1055 | #define E3() \ | |
1056 | \ | |
1057 | WL(Z1); \ | |
1058 | RL(X1); \ | |
1059 | RU(X1); \ | |
1060 | WU(Z1); | |
1061 | ||
1062 | #include "locking-selftest-rlock.h" | |
1063 | GENERATE_PERMUTATIONS_3_EVENTS(W1R2_W2R3_W3R1) | |
1064 | ||
1065 | #undef E1 | |
1066 | #undef E2 | |
1067 | #undef E3 | |
1068 | ||
1069 | /* | |
1070 | * write-write / read-read / write-read deadlock even if read is recursive | |
1071 | */ | |
1072 | ||
1073 | #define E1() \ | |
1074 | \ | |
1075 | WL(X1); \ | |
1076 | WL(Y1); \ | |
1077 | WU(Y1); \ | |
1078 | WU(X1); | |
1079 | ||
1080 | #define E2() \ | |
1081 | \ | |
1082 | RL(Y1); \ | |
1083 | RL(Z1); \ | |
1084 | RU(Z1); \ | |
1085 | RU(Y1); | |
1086 | ||
1087 | #define E3() \ | |
1088 | \ | |
1089 | WL(Z1); \ | |
1090 | RL(X1); \ | |
1091 | RU(X1); \ | |
1092 | WU(Z1); | |
1093 | ||
1094 | #include "locking-selftest-rlock.h" | |
1095 | GENERATE_PERMUTATIONS_3_EVENTS(W1W2_R2R3_W3R1) | |
1096 | ||
1097 | #undef E1 | |
1098 | #undef E2 | |
1099 | #undef E3 | |
1100 | ||
1101 | /* | |
1102 | * write-write / read-read / read-write is not deadlock when read is recursive | |
1103 | */ | |
1104 | ||
1105 | #define E1() \ | |
1106 | \ | |
1107 | WL(X1); \ | |
1108 | WL(Y1); \ | |
1109 | WU(Y1); \ | |
1110 | WU(X1); | |
1111 | ||
1112 | #define E2() \ | |
1113 | \ | |
1114 | RL(Y1); \ | |
1115 | RL(Z1); \ | |
1116 | RU(Z1); \ | |
1117 | RU(Y1); | |
1118 | ||
1119 | #define E3() \ | |
1120 | \ | |
1121 | RL(Z1); \ | |
1122 | WL(X1); \ | |
1123 | WU(X1); \ | |
1124 | RU(Z1); | |
1125 | ||
1126 | #include "locking-selftest-rlock.h" | |
1127 | GENERATE_PERMUTATIONS_3_EVENTS(W1R2_R2R3_W3W1) | |
1128 | ||
1129 | #undef E1 | |
1130 | #undef E2 | |
1131 | #undef E3 | |
1132 | ||
1133 | /* | |
1134 | * write-read / read-read / write-write is not deadlock when read is recursive | |
1135 | */ | |
1136 | ||
1137 | #define E1() \ | |
1138 | \ | |
1139 | WL(X1); \ | |
1140 | RL(Y1); \ | |
1141 | RU(Y1); \ | |
1142 | WU(X1); | |
1143 | ||
1144 | #define E2() \ | |
1145 | \ | |
1146 | RL(Y1); \ | |
1147 | RL(Z1); \ | |
1148 | RU(Z1); \ | |
1149 | RU(Y1); | |
1150 | ||
1151 | #define E3() \ | |
1152 | \ | |
1153 | WL(Z1); \ | |
1154 | WL(X1); \ | |
1155 | WU(X1); \ | |
1156 | WU(Z1); | |
1157 | ||
1158 | #include "locking-selftest-rlock.h" | |
1159 | GENERATE_PERMUTATIONS_3_EVENTS(W1W2_R2R3_R3W1) | |
1160 | ||
1161 | #undef E1 | |
1162 | #undef E2 | |
1163 | #undef E3 | |
cae2ed9a IM |
1164 | /* |
1165 | * read-lock / write-lock recursion that is actually safe. | |
1166 | */ | |
1167 | ||
1168 | #define E1() \ | |
1169 | \ | |
1170 | IRQ_DISABLE(); \ | |
1171 | WL(A); \ | |
1172 | WU(A); \ | |
1173 | IRQ_ENABLE(); | |
1174 | ||
1175 | #define E2() \ | |
1176 | \ | |
1177 | RL(A); \ | |
1178 | RU(A); \ | |
1179 | ||
1180 | #define E3() \ | |
1181 | \ | |
1182 | IRQ_ENTER(); \ | |
31e0d747 | 1183 | LOCK(A); \ |
cae2ed9a IM |
1184 | L(B); \ |
1185 | U(B); \ | |
31e0d747 | 1186 | UNLOCK(A); \ |
cae2ed9a IM |
1187 | IRQ_EXIT(); |
1188 | ||
1189 | /* | |
31e0d747 | 1190 | * Generate 24 testcases: |
cae2ed9a IM |
1191 | */ |
1192 | #include "locking-selftest-hardirq.h" | |
31e0d747 BF |
1193 | #include "locking-selftest-rlock.h" |
1194 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_rlock) | |
1195 | ||
1196 | #include "locking-selftest-wlock.h" | |
1197 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_wlock) | |
cae2ed9a IM |
1198 | |
1199 | #include "locking-selftest-softirq.h" | |
31e0d747 BF |
1200 | #include "locking-selftest-rlock.h" |
1201 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_rlock) | |
1202 | ||
1203 | #include "locking-selftest-wlock.h" | |
1204 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_wlock) | |
cae2ed9a IM |
1205 | |
1206 | #undef E1 | |
1207 | #undef E2 | |
1208 | #undef E3 | |
1209 | ||
1210 | /* | |
1211 | * read-lock / write-lock recursion that is unsafe. | |
1212 | */ | |
1213 | ||
1214 | #define E1() \ | |
1215 | \ | |
1216 | IRQ_DISABLE(); \ | |
1217 | L(B); \ | |
31e0d747 BF |
1218 | LOCK(A); \ |
1219 | UNLOCK(A); \ | |
cae2ed9a IM |
1220 | U(B); \ |
1221 | IRQ_ENABLE(); | |
1222 | ||
1223 | #define E2() \ | |
1224 | \ | |
1225 | RL(A); \ | |
1226 | RU(A); \ | |
1227 | ||
1228 | #define E3() \ | |
1229 | \ | |
1230 | IRQ_ENTER(); \ | |
1231 | L(B); \ | |
1232 | U(B); \ | |
1233 | IRQ_EXIT(); | |
1234 | ||
1235 | /* | |
31e0d747 | 1236 | * Generate 24 testcases: |
cae2ed9a IM |
1237 | */ |
1238 | #include "locking-selftest-hardirq.h" | |
31e0d747 BF |
1239 | #include "locking-selftest-rlock.h" |
1240 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_rlock) | |
1241 | ||
1242 | #include "locking-selftest-wlock.h" | |
1243 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_wlock) | |
cae2ed9a IM |
1244 | |
1245 | #include "locking-selftest-softirq.h" | |
31e0d747 BF |
1246 | #include "locking-selftest-rlock.h" |
1247 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_rlock) | |
1248 | ||
1249 | #include "locking-selftest-wlock.h" | |
1250 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_wlock) | |
cae2ed9a | 1251 | |
cae2ed9a IM |
1252 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1253 | # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) | |
1254 | # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) | |
1255 | # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) | |
1256 | # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) | |
1de99445 | 1257 | # define I_WW(x) lockdep_reset_lock(&x.dep_map) |
018956d6 PZ |
1258 | #ifdef CONFIG_RT_MUTEXES |
1259 | # define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map) | |
1260 | #endif | |
cae2ed9a IM |
1261 | #else |
1262 | # define I_SPINLOCK(x) | |
1263 | # define I_RWLOCK(x) | |
1264 | # define I_MUTEX(x) | |
1265 | # define I_RWSEM(x) | |
1de99445 | 1266 | # define I_WW(x) |
cae2ed9a IM |
1267 | #endif |
1268 | ||
018956d6 PZ |
1269 | #ifndef I_RTMUTEX |
1270 | # define I_RTMUTEX(x) | |
1271 | #endif | |
1272 | ||
1273 | #ifdef CONFIG_RT_MUTEXES | |
1274 | #define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x) | |
1275 | #else | |
1276 | #define I2_RTMUTEX(x) | |
1277 | #endif | |
1278 | ||
cae2ed9a IM |
1279 | #define I1(x) \ |
1280 | do { \ | |
1281 | I_SPINLOCK(x); \ | |
1282 | I_RWLOCK(x); \ | |
1283 | I_MUTEX(x); \ | |
1284 | I_RWSEM(x); \ | |
018956d6 | 1285 | I_RTMUTEX(x); \ |
cae2ed9a IM |
1286 | } while (0) |
1287 | ||
1288 | #define I2(x) \ | |
1289 | do { \ | |
9fb1b90c | 1290 | raw_spin_lock_init(&lock_##x); \ |
cae2ed9a IM |
1291 | rwlock_init(&rwlock_##x); \ |
1292 | mutex_init(&mutex_##x); \ | |
1293 | init_rwsem(&rwsem_##x); \ | |
018956d6 | 1294 | I2_RTMUTEX(x); \ |
cae2ed9a IM |
1295 | } while (0) |
1296 | ||
1297 | static void reset_locks(void) | |
1298 | { | |
1299 | local_irq_disable(); | |
1de99445 ML |
1300 | lockdep_free_key_range(&ww_lockdep.acquire_key, 1); |
1301 | lockdep_free_key_range(&ww_lockdep.mutex_key, 1); | |
1302 | ||
cae2ed9a IM |
1303 | I1(A); I1(B); I1(C); I1(D); |
1304 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); | |
f3cf139e | 1305 | I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
cae2ed9a IM |
1306 | lockdep_reset(); |
1307 | I2(A); I2(B); I2(C); I2(D); | |
1308 | init_shared_classes(); | |
1de99445 | 1309 | |
f3cf139e | 1310 | ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
1de99445 ML |
1311 | memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2)); |
1312 | memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key)); | |
1313 | memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key)); | |
cae2ed9a IM |
1314 | local_irq_enable(); |
1315 | } | |
1316 | ||
1317 | #undef I | |
1318 | ||
1319 | static int testcase_total; | |
1320 | static int testcase_successes; | |
1321 | static int expected_testcase_failures; | |
1322 | static int unexpected_testcase_failures; | |
1323 | ||
1324 | static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) | |
1325 | { | |
1326 | unsigned long saved_preempt_count = preempt_count(); | |
cae2ed9a IM |
1327 | |
1328 | WARN_ON(irqs_disabled()); | |
1329 | ||
1330 | testcase_fn(); | |
1331 | /* | |
1332 | * Filter out expected failures: | |
1333 | */ | |
1334 | #ifndef CONFIG_PROVE_LOCKING | |
166989e3 | 1335 | if (expected == FAILURE && debug_locks) { |
1de99445 | 1336 | expected_testcase_failures++; |
25139409 | 1337 | pr_cont("failed|"); |
166989e3 ML |
1338 | } |
1339 | else | |
1340 | #endif | |
1341 | if (debug_locks != expected) { | |
1de99445 | 1342 | unexpected_testcase_failures++; |
25139409 | 1343 | pr_cont("FAILED|"); |
cae2ed9a IM |
1344 | } else { |
1345 | testcase_successes++; | |
25139409 | 1346 | pr_cont(" ok |"); |
cae2ed9a IM |
1347 | } |
1348 | testcase_total++; | |
1349 | ||
1350 | if (debug_locks_verbose) | |
25139409 | 1351 | pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n", |
cae2ed9a IM |
1352 | lockclass_mask, debug_locks, expected); |
1353 | /* | |
1354 | * Some tests (e.g. double-unlock) might corrupt the preemption | |
1355 | * count, so restore it: | |
1356 | */ | |
4a2b4b22 | 1357 | preempt_count_set(saved_preempt_count); |
cae2ed9a IM |
1358 | #ifdef CONFIG_TRACE_IRQFLAGS |
1359 | if (softirq_count()) | |
1360 | current->softirqs_enabled = 0; | |
1361 | else | |
1362 | current->softirqs_enabled = 1; | |
1363 | #endif | |
1364 | ||
1365 | reset_locks(); | |
1366 | } | |
1367 | ||
018956d6 PZ |
1368 | #ifdef CONFIG_RT_MUTEXES |
1369 | #define dotest_rt(fn, e, m) dotest((fn), (e), (m)) | |
1370 | #else | |
1371 | #define dotest_rt(fn, e, m) | |
1372 | #endif | |
1373 | ||
cae2ed9a IM |
1374 | static inline void print_testname(const char *testname) |
1375 | { | |
1376 | printk("%33s:", testname); | |
1377 | } | |
1378 | ||
1379 | #define DO_TESTCASE_1(desc, name, nr) \ | |
1380 | print_testname(desc"/"#nr); \ | |
1381 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1382 | pr_cont("\n"); |
cae2ed9a IM |
1383 | |
1384 | #define DO_TESTCASE_1B(desc, name, nr) \ | |
1385 | print_testname(desc"/"#nr); \ | |
1386 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
25139409 | 1387 | pr_cont("\n"); |
cae2ed9a | 1388 | |
8ef7ca75 BF |
1389 | #define DO_TESTCASE_1RR(desc, name, nr) \ |
1390 | print_testname(desc"/"#nr); \ | |
1391 | pr_cont(" |"); \ | |
1392 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1393 | pr_cont("\n"); | |
1394 | ||
1395 | #define DO_TESTCASE_1RRB(desc, name, nr) \ | |
1396 | print_testname(desc"/"#nr); \ | |
1397 | pr_cont(" |"); \ | |
1398 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1399 | pr_cont("\n"); | |
1400 | ||
1401 | ||
cae2ed9a IM |
1402 | #define DO_TESTCASE_3(desc, name, nr) \ |
1403 | print_testname(desc"/"#nr); \ | |
1404 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ | |
1405 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1406 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1407 | pr_cont("\n"); |
cae2ed9a IM |
1408 | |
1409 | #define DO_TESTCASE_3RW(desc, name, nr) \ | |
1410 | print_testname(desc"/"#nr); \ | |
1411 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ | |
1412 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1413 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1414 | pr_cont("\n"); |
cae2ed9a | 1415 | |
31e0d747 BF |
1416 | #define DO_TESTCASE_2RW(desc, name, nr) \ |
1417 | print_testname(desc"/"#nr); \ | |
1418 | pr_cont(" |"); \ | |
1419 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1420 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1421 | pr_cont("\n"); | |
1422 | ||
1423 | #define DO_TESTCASE_2x2RW(desc, name, nr) \ | |
1424 | DO_TESTCASE_2RW("hard-"desc, name##_hard, nr) \ | |
1425 | DO_TESTCASE_2RW("soft-"desc, name##_soft, nr) \ | |
1426 | ||
1427 | #define DO_TESTCASE_6x2x2RW(desc, name) \ | |
1428 | DO_TESTCASE_2x2RW(desc, name, 123); \ | |
1429 | DO_TESTCASE_2x2RW(desc, name, 132); \ | |
1430 | DO_TESTCASE_2x2RW(desc, name, 213); \ | |
1431 | DO_TESTCASE_2x2RW(desc, name, 231); \ | |
1432 | DO_TESTCASE_2x2RW(desc, name, 312); \ | |
1433 | DO_TESTCASE_2x2RW(desc, name, 321); | |
1434 | ||
cae2ed9a IM |
1435 | #define DO_TESTCASE_6(desc, name) \ |
1436 | print_testname(desc); \ | |
1437 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1438 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1439 | dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1440 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1441 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1442 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1443 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1444 | pr_cont("\n"); |
cae2ed9a IM |
1445 | |
1446 | #define DO_TESTCASE_6_SUCCESS(desc, name) \ | |
1447 | print_testname(desc); \ | |
1448 | dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ | |
1449 | dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1450 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1451 | dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ | |
1452 | dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1453 | dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
018956d6 | 1454 | dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \ |
25139409 | 1455 | pr_cont("\n"); |
cae2ed9a IM |
1456 | |
1457 | /* | |
1458 | * 'read' variant: rlocks must not trigger. | |
1459 | */ | |
1460 | #define DO_TESTCASE_6R(desc, name) \ | |
1461 | print_testname(desc); \ | |
1462 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1463 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1464 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1465 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1466 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1467 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1468 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1469 | pr_cont("\n"); |
cae2ed9a IM |
1470 | |
1471 | #define DO_TESTCASE_2I(desc, name, nr) \ | |
1472 | DO_TESTCASE_1("hard-"desc, name##_hard, nr); \ | |
1473 | DO_TESTCASE_1("soft-"desc, name##_soft, nr); | |
1474 | ||
1475 | #define DO_TESTCASE_2IB(desc, name, nr) \ | |
1476 | DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \ | |
1477 | DO_TESTCASE_1B("soft-"desc, name##_soft, nr); | |
1478 | ||
1479 | #define DO_TESTCASE_6I(desc, name, nr) \ | |
1480 | DO_TESTCASE_3("hard-"desc, name##_hard, nr); \ | |
1481 | DO_TESTCASE_3("soft-"desc, name##_soft, nr); | |
1482 | ||
1483 | #define DO_TESTCASE_6IRW(desc, name, nr) \ | |
1484 | DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \ | |
1485 | DO_TESTCASE_3RW("soft-"desc, name##_soft, nr); | |
1486 | ||
1487 | #define DO_TESTCASE_2x3(desc, name) \ | |
1488 | DO_TESTCASE_3(desc, name, 12); \ | |
1489 | DO_TESTCASE_3(desc, name, 21); | |
1490 | ||
1491 | #define DO_TESTCASE_2x6(desc, name) \ | |
1492 | DO_TESTCASE_6I(desc, name, 12); \ | |
1493 | DO_TESTCASE_6I(desc, name, 21); | |
1494 | ||
1495 | #define DO_TESTCASE_6x2(desc, name) \ | |
1496 | DO_TESTCASE_2I(desc, name, 123); \ | |
1497 | DO_TESTCASE_2I(desc, name, 132); \ | |
1498 | DO_TESTCASE_2I(desc, name, 213); \ | |
1499 | DO_TESTCASE_2I(desc, name, 231); \ | |
1500 | DO_TESTCASE_2I(desc, name, 312); \ | |
1501 | DO_TESTCASE_2I(desc, name, 321); | |
1502 | ||
1503 | #define DO_TESTCASE_6x2B(desc, name) \ | |
1504 | DO_TESTCASE_2IB(desc, name, 123); \ | |
1505 | DO_TESTCASE_2IB(desc, name, 132); \ | |
1506 | DO_TESTCASE_2IB(desc, name, 213); \ | |
1507 | DO_TESTCASE_2IB(desc, name, 231); \ | |
1508 | DO_TESTCASE_2IB(desc, name, 312); \ | |
1509 | DO_TESTCASE_2IB(desc, name, 321); | |
1510 | ||
8ef7ca75 BF |
1511 | #define DO_TESTCASE_6x1RR(desc, name) \ |
1512 | DO_TESTCASE_1RR(desc, name, 123); \ | |
1513 | DO_TESTCASE_1RR(desc, name, 132); \ | |
1514 | DO_TESTCASE_1RR(desc, name, 213); \ | |
1515 | DO_TESTCASE_1RR(desc, name, 231); \ | |
1516 | DO_TESTCASE_1RR(desc, name, 312); \ | |
1517 | DO_TESTCASE_1RR(desc, name, 321); | |
1518 | ||
1519 | #define DO_TESTCASE_6x1RRB(desc, name) \ | |
1520 | DO_TESTCASE_1RRB(desc, name, 123); \ | |
1521 | DO_TESTCASE_1RRB(desc, name, 132); \ | |
1522 | DO_TESTCASE_1RRB(desc, name, 213); \ | |
1523 | DO_TESTCASE_1RRB(desc, name, 231); \ | |
1524 | DO_TESTCASE_1RRB(desc, name, 312); \ | |
1525 | DO_TESTCASE_1RRB(desc, name, 321); | |
1526 | ||
cae2ed9a IM |
1527 | #define DO_TESTCASE_6x6(desc, name) \ |
1528 | DO_TESTCASE_6I(desc, name, 123); \ | |
1529 | DO_TESTCASE_6I(desc, name, 132); \ | |
1530 | DO_TESTCASE_6I(desc, name, 213); \ | |
1531 | DO_TESTCASE_6I(desc, name, 231); \ | |
1532 | DO_TESTCASE_6I(desc, name, 312); \ | |
1533 | DO_TESTCASE_6I(desc, name, 321); | |
1534 | ||
1535 | #define DO_TESTCASE_6x6RW(desc, name) \ | |
1536 | DO_TESTCASE_6IRW(desc, name, 123); \ | |
1537 | DO_TESTCASE_6IRW(desc, name, 132); \ | |
1538 | DO_TESTCASE_6IRW(desc, name, 213); \ | |
1539 | DO_TESTCASE_6IRW(desc, name, 231); \ | |
1540 | DO_TESTCASE_6IRW(desc, name, 312); \ | |
1541 | DO_TESTCASE_6IRW(desc, name, 321); | |
1542 | ||
1de99445 ML |
1543 | static void ww_test_fail_acquire(void) |
1544 | { | |
1545 | int ret; | |
1546 | ||
1547 | WWAI(&t); | |
1548 | t.stamp++; | |
1549 | ||
1550 | ret = WWL(&o, &t); | |
1551 | ||
1552 | if (WARN_ON(!o.ctx) || | |
1553 | WARN_ON(ret)) | |
1554 | return; | |
1555 | ||
1556 | /* No lockdep test, pure API */ | |
1557 | ret = WWL(&o, &t); | |
1558 | WARN_ON(ret != -EALREADY); | |
1559 | ||
1560 | ret = WWT(&o); | |
1561 | WARN_ON(ret); | |
1562 | ||
1563 | t2 = t; | |
1564 | t2.stamp++; | |
1565 | ret = WWL(&o, &t2); | |
1566 | WARN_ON(ret != -EDEADLK); | |
1567 | WWU(&o); | |
1568 | ||
1569 | if (WWT(&o)) | |
1570 | WWU(&o); | |
1571 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
1572 | else | |
1573 | DEBUG_LOCKS_WARN_ON(1); | |
1574 | #endif | |
1575 | } | |
1576 | ||
2fe3d4b1 ML |
1577 | static void ww_test_normal(void) |
1578 | { | |
1579 | int ret; | |
1580 | ||
1581 | WWAI(&t); | |
1582 | ||
1583 | /* | |
1584 | * None of the ww_mutex codepaths should be taken in the 'normal' | |
1585 | * mutex calls. The easiest way to verify this is by using the | |
1586 | * normal mutex calls, and making sure o.ctx is unmodified. | |
1587 | */ | |
1588 | ||
1589 | /* mutex_lock (and indirectly, mutex_lock_nested) */ | |
1590 | o.ctx = (void *)~0UL; | |
1591 | mutex_lock(&o.base); | |
1592 | mutex_unlock(&o.base); | |
1593 | WARN_ON(o.ctx != (void *)~0UL); | |
1594 | ||
1595 | /* mutex_lock_interruptible (and *_nested) */ | |
1596 | o.ctx = (void *)~0UL; | |
1597 | ret = mutex_lock_interruptible(&o.base); | |
1598 | if (!ret) | |
1599 | mutex_unlock(&o.base); | |
1600 | else | |
1601 | WARN_ON(1); | |
1602 | WARN_ON(o.ctx != (void *)~0UL); | |
1603 | ||
1604 | /* mutex_lock_killable (and *_nested) */ | |
1605 | o.ctx = (void *)~0UL; | |
1606 | ret = mutex_lock_killable(&o.base); | |
1607 | if (!ret) | |
1608 | mutex_unlock(&o.base); | |
1609 | else | |
1610 | WARN_ON(1); | |
1611 | WARN_ON(o.ctx != (void *)~0UL); | |
1612 | ||
1613 | /* trylock, succeeding */ | |
1614 | o.ctx = (void *)~0UL; | |
1615 | ret = mutex_trylock(&o.base); | |
1616 | WARN_ON(!ret); | |
1617 | if (ret) | |
1618 | mutex_unlock(&o.base); | |
1619 | else | |
1620 | WARN_ON(1); | |
1621 | WARN_ON(o.ctx != (void *)~0UL); | |
1622 | ||
1623 | /* trylock, failing */ | |
1624 | o.ctx = (void *)~0UL; | |
1625 | mutex_lock(&o.base); | |
1626 | ret = mutex_trylock(&o.base); | |
1627 | WARN_ON(ret); | |
1628 | mutex_unlock(&o.base); | |
1629 | WARN_ON(o.ctx != (void *)~0UL); | |
1630 | ||
1631 | /* nest_lock */ | |
1632 | o.ctx = (void *)~0UL; | |
1633 | mutex_lock_nest_lock(&o.base, &t); | |
1634 | mutex_unlock(&o.base); | |
1635 | WARN_ON(o.ctx != (void *)~0UL); | |
1636 | } | |
1637 | ||
1de99445 ML |
1638 | static void ww_test_two_contexts(void) |
1639 | { | |
1640 | WWAI(&t); | |
1641 | WWAI(&t2); | |
1642 | } | |
1643 | ||
1644 | static void ww_test_diff_class(void) | |
1645 | { | |
1646 | WWAI(&t); | |
1647 | #ifdef CONFIG_DEBUG_MUTEXES | |
1648 | t.ww_class = NULL; | |
1649 | #endif | |
1650 | WWL(&o, &t); | |
1651 | } | |
1652 | ||
1653 | static void ww_test_context_done_twice(void) | |
1654 | { | |
1655 | WWAI(&t); | |
1656 | WWAD(&t); | |
1657 | WWAD(&t); | |
1658 | WWAF(&t); | |
1659 | } | |
1660 | ||
1661 | static void ww_test_context_unlock_twice(void) | |
1662 | { | |
1663 | WWAI(&t); | |
1664 | WWAD(&t); | |
1665 | WWAF(&t); | |
1666 | WWAF(&t); | |
1667 | } | |
1668 | ||
1669 | static void ww_test_context_fini_early(void) | |
1670 | { | |
1671 | WWAI(&t); | |
1672 | WWL(&o, &t); | |
1673 | WWAD(&t); | |
1674 | WWAF(&t); | |
1675 | } | |
1676 | ||
1677 | static void ww_test_context_lock_after_done(void) | |
1678 | { | |
1679 | WWAI(&t); | |
1680 | WWAD(&t); | |
1681 | WWL(&o, &t); | |
1682 | } | |
1683 | ||
1684 | static void ww_test_object_unlock_twice(void) | |
1685 | { | |
1686 | WWL1(&o); | |
1687 | WWU(&o); | |
1688 | WWU(&o); | |
1689 | } | |
1690 | ||
1691 | static void ww_test_object_lock_unbalanced(void) | |
1692 | { | |
1693 | WWAI(&t); | |
1694 | WWL(&o, &t); | |
1695 | t.acquired = 0; | |
1696 | WWU(&o); | |
1697 | WWAF(&t); | |
1698 | } | |
1699 | ||
1700 | static void ww_test_object_lock_stale_context(void) | |
1701 | { | |
1702 | WWAI(&t); | |
1703 | o.ctx = &t2; | |
1704 | WWL(&o, &t); | |
1705 | } | |
1706 | ||
f3cf139e ML |
1707 | static void ww_test_edeadlk_normal(void) |
1708 | { | |
1709 | int ret; | |
1710 | ||
1711 | mutex_lock(&o2.base); | |
1712 | o2.ctx = &t2; | |
5facae4f | 1713 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1714 | |
1715 | WWAI(&t); | |
1716 | t2 = t; | |
1717 | t2.stamp--; | |
1718 | ||
1719 | ret = WWL(&o, &t); | |
1720 | WARN_ON(ret); | |
1721 | ||
1722 | ret = WWL(&o2, &t); | |
1723 | WARN_ON(ret != -EDEADLK); | |
1724 | ||
1725 | o2.ctx = NULL; | |
1726 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1727 | mutex_unlock(&o2.base); | |
1728 | WWU(&o); | |
1729 | ||
1730 | WWL(&o2, &t); | |
1731 | } | |
1732 | ||
1733 | static void ww_test_edeadlk_normal_slow(void) | |
1734 | { | |
1735 | int ret; | |
1736 | ||
1737 | mutex_lock(&o2.base); | |
5facae4f | 1738 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1739 | o2.ctx = &t2; |
1740 | ||
1741 | WWAI(&t); | |
1742 | t2 = t; | |
1743 | t2.stamp--; | |
1744 | ||
1745 | ret = WWL(&o, &t); | |
1746 | WARN_ON(ret); | |
1747 | ||
1748 | ret = WWL(&o2, &t); | |
1749 | WARN_ON(ret != -EDEADLK); | |
1750 | ||
1751 | o2.ctx = NULL; | |
1752 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1753 | mutex_unlock(&o2.base); | |
1754 | WWU(&o); | |
1755 | ||
1756 | ww_mutex_lock_slow(&o2, &t); | |
1757 | } | |
1758 | ||
1759 | static void ww_test_edeadlk_no_unlock(void) | |
1760 | { | |
1761 | int ret; | |
1762 | ||
1763 | mutex_lock(&o2.base); | |
1764 | o2.ctx = &t2; | |
5facae4f | 1765 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1766 | |
1767 | WWAI(&t); | |
1768 | t2 = t; | |
1769 | t2.stamp--; | |
1770 | ||
1771 | ret = WWL(&o, &t); | |
1772 | WARN_ON(ret); | |
1773 | ||
1774 | ret = WWL(&o2, &t); | |
1775 | WARN_ON(ret != -EDEADLK); | |
1776 | ||
1777 | o2.ctx = NULL; | |
1778 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1779 | mutex_unlock(&o2.base); | |
1780 | ||
1781 | WWL(&o2, &t); | |
1782 | } | |
1783 | ||
1784 | static void ww_test_edeadlk_no_unlock_slow(void) | |
1785 | { | |
1786 | int ret; | |
1787 | ||
1788 | mutex_lock(&o2.base); | |
5facae4f | 1789 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1790 | o2.ctx = &t2; |
1791 | ||
1792 | WWAI(&t); | |
1793 | t2 = t; | |
1794 | t2.stamp--; | |
1795 | ||
1796 | ret = WWL(&o, &t); | |
1797 | WARN_ON(ret); | |
1798 | ||
1799 | ret = WWL(&o2, &t); | |
1800 | WARN_ON(ret != -EDEADLK); | |
1801 | ||
1802 | o2.ctx = NULL; | |
1803 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1804 | mutex_unlock(&o2.base); | |
1805 | ||
1806 | ww_mutex_lock_slow(&o2, &t); | |
1807 | } | |
1808 | ||
1809 | static void ww_test_edeadlk_acquire_more(void) | |
1810 | { | |
1811 | int ret; | |
1812 | ||
1813 | mutex_lock(&o2.base); | |
5facae4f | 1814 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1815 | o2.ctx = &t2; |
1816 | ||
1817 | WWAI(&t); | |
1818 | t2 = t; | |
1819 | t2.stamp--; | |
1820 | ||
1821 | ret = WWL(&o, &t); | |
1822 | WARN_ON(ret); | |
1823 | ||
1824 | ret = WWL(&o2, &t); | |
1825 | WARN_ON(ret != -EDEADLK); | |
1826 | ||
1827 | ret = WWL(&o3, &t); | |
1828 | } | |
1829 | ||
1830 | static void ww_test_edeadlk_acquire_more_slow(void) | |
1831 | { | |
1832 | int ret; | |
1833 | ||
1834 | mutex_lock(&o2.base); | |
5facae4f | 1835 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1836 | o2.ctx = &t2; |
1837 | ||
1838 | WWAI(&t); | |
1839 | t2 = t; | |
1840 | t2.stamp--; | |
1841 | ||
1842 | ret = WWL(&o, &t); | |
1843 | WARN_ON(ret); | |
1844 | ||
1845 | ret = WWL(&o2, &t); | |
1846 | WARN_ON(ret != -EDEADLK); | |
1847 | ||
1848 | ww_mutex_lock_slow(&o3, &t); | |
1849 | } | |
1850 | ||
1851 | static void ww_test_edeadlk_acquire_more_edeadlk(void) | |
1852 | { | |
1853 | int ret; | |
1854 | ||
1855 | mutex_lock(&o2.base); | |
5facae4f | 1856 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1857 | o2.ctx = &t2; |
1858 | ||
1859 | mutex_lock(&o3.base); | |
5facae4f | 1860 | mutex_release(&o3.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1861 | o3.ctx = &t2; |
1862 | ||
1863 | WWAI(&t); | |
1864 | t2 = t; | |
1865 | t2.stamp--; | |
1866 | ||
1867 | ret = WWL(&o, &t); | |
1868 | WARN_ON(ret); | |
1869 | ||
1870 | ret = WWL(&o2, &t); | |
1871 | WARN_ON(ret != -EDEADLK); | |
1872 | ||
1873 | ret = WWL(&o3, &t); | |
1874 | WARN_ON(ret != -EDEADLK); | |
1875 | } | |
1876 | ||
1877 | static void ww_test_edeadlk_acquire_more_edeadlk_slow(void) | |
1878 | { | |
1879 | int ret; | |
1880 | ||
1881 | mutex_lock(&o2.base); | |
5facae4f | 1882 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1883 | o2.ctx = &t2; |
1884 | ||
1885 | mutex_lock(&o3.base); | |
5facae4f | 1886 | mutex_release(&o3.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1887 | o3.ctx = &t2; |
1888 | ||
1889 | WWAI(&t); | |
1890 | t2 = t; | |
1891 | t2.stamp--; | |
1892 | ||
1893 | ret = WWL(&o, &t); | |
1894 | WARN_ON(ret); | |
1895 | ||
1896 | ret = WWL(&o2, &t); | |
1897 | WARN_ON(ret != -EDEADLK); | |
1898 | ||
1899 | ww_mutex_lock_slow(&o3, &t); | |
1900 | } | |
1901 | ||
1902 | static void ww_test_edeadlk_acquire_wrong(void) | |
1903 | { | |
1904 | int ret; | |
1905 | ||
1906 | mutex_lock(&o2.base); | |
5facae4f | 1907 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1908 | o2.ctx = &t2; |
1909 | ||
1910 | WWAI(&t); | |
1911 | t2 = t; | |
1912 | t2.stamp--; | |
1913 | ||
1914 | ret = WWL(&o, &t); | |
1915 | WARN_ON(ret); | |
1916 | ||
1917 | ret = WWL(&o2, &t); | |
1918 | WARN_ON(ret != -EDEADLK); | |
1919 | if (!ret) | |
1920 | WWU(&o2); | |
1921 | ||
1922 | WWU(&o); | |
1923 | ||
1924 | ret = WWL(&o3, &t); | |
1925 | } | |
1926 | ||
1927 | static void ww_test_edeadlk_acquire_wrong_slow(void) | |
1928 | { | |
1929 | int ret; | |
1930 | ||
1931 | mutex_lock(&o2.base); | |
5facae4f | 1932 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1933 | o2.ctx = &t2; |
1934 | ||
1935 | WWAI(&t); | |
1936 | t2 = t; | |
1937 | t2.stamp--; | |
1938 | ||
1939 | ret = WWL(&o, &t); | |
1940 | WARN_ON(ret); | |
1941 | ||
1942 | ret = WWL(&o2, &t); | |
1943 | WARN_ON(ret != -EDEADLK); | |
1944 | if (!ret) | |
1945 | WWU(&o2); | |
1946 | ||
1947 | WWU(&o); | |
1948 | ||
1949 | ww_mutex_lock_slow(&o3, &t); | |
1950 | } | |
1951 | ||
1de99445 ML |
1952 | static void ww_test_spin_nest_unlocked(void) |
1953 | { | |
1954 | raw_spin_lock_nest_lock(&lock_A, &o.base); | |
1955 | U(A); | |
1956 | } | |
1957 | ||
1958 | static void ww_test_unneeded_slow(void) | |
1959 | { | |
1960 | WWAI(&t); | |
1961 | ||
1962 | ww_mutex_lock_slow(&o, &t); | |
1963 | } | |
1964 | ||
1965 | static void ww_test_context_block(void) | |
1966 | { | |
1967 | int ret; | |
1968 | ||
1969 | WWAI(&t); | |
1970 | ||
1971 | ret = WWL(&o, &t); | |
1972 | WARN_ON(ret); | |
1973 | WWL1(&o2); | |
1974 | } | |
1975 | ||
1976 | static void ww_test_context_try(void) | |
1977 | { | |
1978 | int ret; | |
1979 | ||
1980 | WWAI(&t); | |
1981 | ||
1982 | ret = WWL(&o, &t); | |
1983 | WARN_ON(ret); | |
1984 | ||
1985 | ret = WWT(&o2); | |
1986 | WARN_ON(!ret); | |
1987 | WWU(&o2); | |
1988 | WWU(&o); | |
1989 | } | |
1990 | ||
1991 | static void ww_test_context_context(void) | |
1992 | { | |
1993 | int ret; | |
1994 | ||
1995 | WWAI(&t); | |
1996 | ||
1997 | ret = WWL(&o, &t); | |
1998 | WARN_ON(ret); | |
1999 | ||
2000 | ret = WWL(&o2, &t); | |
2001 | WARN_ON(ret); | |
2002 | ||
2003 | WWU(&o2); | |
2004 | WWU(&o); | |
2005 | } | |
2006 | ||
2007 | static void ww_test_try_block(void) | |
2008 | { | |
2009 | bool ret; | |
2010 | ||
2011 | ret = WWT(&o); | |
2012 | WARN_ON(!ret); | |
2013 | ||
2014 | WWL1(&o2); | |
2015 | WWU(&o2); | |
2016 | WWU(&o); | |
2017 | } | |
2018 | ||
2019 | static void ww_test_try_try(void) | |
2020 | { | |
2021 | bool ret; | |
2022 | ||
2023 | ret = WWT(&o); | |
2024 | WARN_ON(!ret); | |
2025 | ret = WWT(&o2); | |
2026 | WARN_ON(!ret); | |
2027 | WWU(&o2); | |
2028 | WWU(&o); | |
2029 | } | |
2030 | ||
2031 | static void ww_test_try_context(void) | |
2032 | { | |
2033 | int ret; | |
2034 | ||
2035 | ret = WWT(&o); | |
2036 | WARN_ON(!ret); | |
2037 | ||
2038 | WWAI(&t); | |
2039 | ||
2040 | ret = WWL(&o2, &t); | |
2041 | WARN_ON(ret); | |
2042 | } | |
2043 | ||
2044 | static void ww_test_block_block(void) | |
2045 | { | |
2046 | WWL1(&o); | |
2047 | WWL1(&o2); | |
2048 | } | |
2049 | ||
2050 | static void ww_test_block_try(void) | |
2051 | { | |
2052 | bool ret; | |
2053 | ||
2054 | WWL1(&o); | |
2055 | ret = WWT(&o2); | |
2056 | WARN_ON(!ret); | |
2057 | } | |
2058 | ||
2059 | static void ww_test_block_context(void) | |
2060 | { | |
2061 | int ret; | |
2062 | ||
2063 | WWL1(&o); | |
2064 | WWAI(&t); | |
2065 | ||
2066 | ret = WWL(&o2, &t); | |
2067 | WARN_ON(ret); | |
2068 | } | |
2069 | ||
2070 | static void ww_test_spin_block(void) | |
2071 | { | |
2072 | L(A); | |
2073 | U(A); | |
2074 | ||
2075 | WWL1(&o); | |
2076 | L(A); | |
2077 | U(A); | |
2078 | WWU(&o); | |
2079 | ||
2080 | L(A); | |
2081 | WWL1(&o); | |
2082 | WWU(&o); | |
2083 | U(A); | |
2084 | } | |
2085 | ||
2086 | static void ww_test_spin_try(void) | |
2087 | { | |
2088 | bool ret; | |
2089 | ||
2090 | L(A); | |
2091 | U(A); | |
2092 | ||
2093 | ret = WWT(&o); | |
2094 | WARN_ON(!ret); | |
2095 | L(A); | |
2096 | U(A); | |
2097 | WWU(&o); | |
2098 | ||
2099 | L(A); | |
2100 | ret = WWT(&o); | |
2101 | WARN_ON(!ret); | |
2102 | WWU(&o); | |
2103 | U(A); | |
2104 | } | |
2105 | ||
2106 | static void ww_test_spin_context(void) | |
2107 | { | |
2108 | int ret; | |
2109 | ||
2110 | L(A); | |
2111 | U(A); | |
2112 | ||
2113 | WWAI(&t); | |
2114 | ||
2115 | ret = WWL(&o, &t); | |
2116 | WARN_ON(ret); | |
2117 | L(A); | |
2118 | U(A); | |
2119 | WWU(&o); | |
2120 | ||
2121 | L(A); | |
2122 | ret = WWL(&o, &t); | |
2123 | WARN_ON(ret); | |
2124 | WWU(&o); | |
2125 | U(A); | |
2126 | } | |
2127 | ||
2128 | static void ww_tests(void) | |
2129 | { | |
2130 | printk(" --------------------------------------------------------------------------\n"); | |
2131 | printk(" | Wound/wait tests |\n"); | |
2132 | printk(" ---------------------\n"); | |
2133 | ||
2134 | print_testname("ww api failures"); | |
2135 | dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW); | |
2fe3d4b1 | 2136 | dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
1de99445 | 2137 | dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
25139409 | 2138 | pr_cont("\n"); |
1de99445 ML |
2139 | |
2140 | print_testname("ww contexts mixing"); | |
2141 | dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW); | |
2142 | dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW); | |
25139409 | 2143 | pr_cont("\n"); |
1de99445 ML |
2144 | |
2145 | print_testname("finishing ww context"); | |
2146 | dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW); | |
2147 | dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW); | |
2148 | dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW); | |
2149 | dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW); | |
25139409 | 2150 | pr_cont("\n"); |
1de99445 ML |
2151 | |
2152 | print_testname("locking mismatches"); | |
2153 | dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW); | |
2154 | dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW); | |
2155 | dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2156 | pr_cont("\n"); |
1de99445 | 2157 | |
f3cf139e ML |
2158 | print_testname("EDEADLK handling"); |
2159 | dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW); | |
2160 | dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW); | |
2161 | dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW); | |
2162 | dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW); | |
2163 | dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW); | |
2164 | dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW); | |
2165 | dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW); | |
2166 | dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW); | |
2167 | dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW); | |
2168 | dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW); | |
25139409 | 2169 | pr_cont("\n"); |
f3cf139e | 2170 | |
1de99445 ML |
2171 | print_testname("spinlock nest unlocked"); |
2172 | dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW); | |
25139409 | 2173 | pr_cont("\n"); |
1de99445 ML |
2174 | |
2175 | printk(" -----------------------------------------------------\n"); | |
2176 | printk(" |block | try |context|\n"); | |
2177 | printk(" -----------------------------------------------------\n"); | |
2178 | ||
2179 | print_testname("context"); | |
2180 | dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW); | |
2181 | dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW); | |
2182 | dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW); | |
25139409 | 2183 | pr_cont("\n"); |
1de99445 ML |
2184 | |
2185 | print_testname("try"); | |
2186 | dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW); | |
2187 | dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW); | |
2188 | dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2189 | pr_cont("\n"); |
1de99445 ML |
2190 | |
2191 | print_testname("block"); | |
2192 | dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW); | |
2193 | dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW); | |
2194 | dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2195 | pr_cont("\n"); |
1de99445 ML |
2196 | |
2197 | print_testname("spinlock"); | |
2198 | dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW); | |
2199 | dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW); | |
2200 | dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2201 | pr_cont("\n"); |
1de99445 | 2202 | } |
cae2ed9a | 2203 | |
ad56450d BF |
2204 | |
2205 | /* | |
2206 | * <in hardirq handler> | |
2207 | * read_lock(&A); | |
2208 | * <hardirq disable> | |
2209 | * spin_lock(&B); | |
2210 | * spin_lock(&B); | |
2211 | * read_lock(&A); | |
2212 | * | |
2213 | * is a deadlock. | |
2214 | */ | |
2215 | static void queued_read_lock_hardirq_RE_Er(void) | |
2216 | { | |
2217 | HARDIRQ_ENTER(); | |
2218 | read_lock(&rwlock_A); | |
2219 | LOCK(B); | |
2220 | UNLOCK(B); | |
2221 | read_unlock(&rwlock_A); | |
2222 | HARDIRQ_EXIT(); | |
2223 | ||
2224 | HARDIRQ_DISABLE(); | |
2225 | LOCK(B); | |
2226 | read_lock(&rwlock_A); | |
2227 | read_unlock(&rwlock_A); | |
2228 | UNLOCK(B); | |
2229 | HARDIRQ_ENABLE(); | |
2230 | } | |
2231 | ||
2232 | /* | |
2233 | * <in hardirq handler> | |
2234 | * spin_lock(&B); | |
2235 | * <hardirq disable> | |
2236 | * read_lock(&A); | |
2237 | * read_lock(&A); | |
2238 | * spin_lock(&B); | |
2239 | * | |
2240 | * is not a deadlock. | |
2241 | */ | |
2242 | static void queued_read_lock_hardirq_ER_rE(void) | |
2243 | { | |
2244 | HARDIRQ_ENTER(); | |
2245 | LOCK(B); | |
2246 | read_lock(&rwlock_A); | |
2247 | read_unlock(&rwlock_A); | |
2248 | UNLOCK(B); | |
2249 | HARDIRQ_EXIT(); | |
2250 | ||
2251 | HARDIRQ_DISABLE(); | |
2252 | read_lock(&rwlock_A); | |
2253 | LOCK(B); | |
2254 | UNLOCK(B); | |
2255 | read_unlock(&rwlock_A); | |
2256 | HARDIRQ_ENABLE(); | |
2257 | } | |
2258 | ||
2259 | /* | |
2260 | * <hardirq disable> | |
2261 | * spin_lock(&B); | |
2262 | * read_lock(&A); | |
2263 | * <in hardirq handler> | |
2264 | * spin_lock(&B); | |
2265 | * read_lock(&A); | |
2266 | * | |
2267 | * is a deadlock. Because the two read_lock()s are both non-recursive readers. | |
2268 | */ | |
2269 | static void queued_read_lock_hardirq_inversion(void) | |
2270 | { | |
2271 | ||
2272 | HARDIRQ_ENTER(); | |
2273 | LOCK(B); | |
2274 | UNLOCK(B); | |
2275 | HARDIRQ_EXIT(); | |
2276 | ||
2277 | HARDIRQ_DISABLE(); | |
2278 | LOCK(B); | |
2279 | read_lock(&rwlock_A); | |
2280 | read_unlock(&rwlock_A); | |
2281 | UNLOCK(B); | |
2282 | HARDIRQ_ENABLE(); | |
2283 | ||
2284 | read_lock(&rwlock_A); | |
2285 | read_unlock(&rwlock_A); | |
2286 | } | |
2287 | ||
2288 | static void queued_read_lock_tests(void) | |
2289 | { | |
2290 | printk(" --------------------------------------------------------------------------\n"); | |
2291 | printk(" | queued read lock tests |\n"); | |
2292 | printk(" ---------------------------\n"); | |
2293 | print_testname("hardirq read-lock/lock-read"); | |
2294 | dotest(queued_read_lock_hardirq_RE_Er, FAILURE, LOCKTYPE_RWLOCK); | |
2295 | pr_cont("\n"); | |
2296 | ||
2297 | print_testname("hardirq lock-read/read-lock"); | |
2298 | dotest(queued_read_lock_hardirq_ER_rE, SUCCESS, LOCKTYPE_RWLOCK); | |
2299 | pr_cont("\n"); | |
2300 | ||
2301 | print_testname("hardirq inversion"); | |
2302 | dotest(queued_read_lock_hardirq_inversion, FAILURE, LOCKTYPE_RWLOCK); | |
2303 | pr_cont("\n"); | |
2304 | } | |
2305 | ||
cae2ed9a IM |
2306 | void locking_selftest(void) |
2307 | { | |
2308 | /* | |
2309 | * Got a locking failure before the selftest ran? | |
2310 | */ | |
2311 | if (!debug_locks) { | |
2312 | printk("----------------------------------\n"); | |
2313 | printk("| Locking API testsuite disabled |\n"); | |
2314 | printk("----------------------------------\n"); | |
2315 | return; | |
2316 | } | |
2317 | ||
e9181886 BF |
2318 | /* |
2319 | * treats read_lock() as recursive read locks for testing purpose | |
2320 | */ | |
2321 | force_read_lock_recursive = 1; | |
2322 | ||
cae2ed9a IM |
2323 | /* |
2324 | * Run the testsuite: | |
2325 | */ | |
2326 | printk("------------------------\n"); | |
2327 | printk("| Locking API testsuite:\n"); | |
2328 | printk("----------------------------------------------------------------------------\n"); | |
2329 | printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n"); | |
2330 | printk(" --------------------------------------------------------------------------\n"); | |
2331 | ||
2332 | init_shared_classes(); | |
2333 | debug_locks_silent = !debug_locks_verbose; | |
cdc84d79 | 2334 | lockdep_set_selftest_task(current); |
cae2ed9a | 2335 | |
6c9076ec | 2336 | DO_TESTCASE_6R("A-A deadlock", AA); |
cae2ed9a IM |
2337 | DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); |
2338 | DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA); | |
2339 | DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC); | |
2340 | DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA); | |
2341 | DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA); | |
2342 | DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA); | |
2343 | DO_TESTCASE_6("double unlock", double_unlock); | |
2344 | DO_TESTCASE_6("initialize held", init_held); | |
cae2ed9a IM |
2345 | |
2346 | printk(" --------------------------------------------------------------------------\n"); | |
2347 | print_testname("recursive read-lock"); | |
25139409 | 2348 | pr_cont(" |"); |
cae2ed9a | 2349 | dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 2350 | pr_cont(" |"); |
cae2ed9a | 2351 | dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2352 | pr_cont("\n"); |
cae2ed9a IM |
2353 | |
2354 | print_testname("recursive read-lock #2"); | |
25139409 | 2355 | pr_cont(" |"); |
6c9076ec | 2356 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 2357 | pr_cont(" |"); |
cae2ed9a | 2358 | dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2359 | pr_cont("\n"); |
cae2ed9a IM |
2360 | |
2361 | print_testname("mixed read-write-lock"); | |
25139409 | 2362 | pr_cont(" |"); |
cae2ed9a | 2363 | dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 2364 | pr_cont(" |"); |
cae2ed9a | 2365 | dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2366 | pr_cont("\n"); |
cae2ed9a IM |
2367 | |
2368 | print_testname("mixed write-read-lock"); | |
25139409 | 2369 | pr_cont(" |"); |
cae2ed9a | 2370 | dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 2371 | pr_cont(" |"); |
cae2ed9a | 2372 | dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2373 | pr_cont("\n"); |
cae2ed9a | 2374 | |
e9149858 PZ |
2375 | print_testname("mixed read-lock/lock-write ABBA"); |
2376 | pr_cont(" |"); | |
2377 | dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK); | |
2378 | pr_cont(" |"); | |
2379 | dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM); | |
2380 | ||
2381 | print_testname("mixed read-lock/lock-read ABBA"); | |
2382 | pr_cont(" |"); | |
2383 | dotest(rlock_ABBA2, SUCCESS, LOCKTYPE_RWLOCK); | |
2384 | pr_cont(" |"); | |
2385 | dotest(rwsem_ABBA2, FAILURE, LOCKTYPE_RWSEM); | |
2386 | ||
2387 | print_testname("mixed write-lock/lock-write ABBA"); | |
2388 | pr_cont(" |"); | |
2389 | dotest(rlock_ABBA3, FAILURE, LOCKTYPE_RWLOCK); | |
2390 | pr_cont(" |"); | |
2391 | dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM); | |
2392 | ||
d4f200e5 BF |
2393 | print_testname("chain cached mixed R-L/L-W ABBA"); |
2394 | pr_cont(" |"); | |
2395 | dotest(rlock_chaincache_ABBA1, FAILURE, LOCKTYPE_RWLOCK); | |
2396 | ||
8ef7ca75 BF |
2397 | DO_TESTCASE_6x1RRB("rlock W1R2/W2R3/W3R1", W1R2_W2R3_W3R1); |
2398 | DO_TESTCASE_6x1RRB("rlock W1W2/R2R3/W3R1", W1W2_R2R3_W3R1); | |
2399 | DO_TESTCASE_6x1RR("rlock W1W2/R2R3/R3W1", W1W2_R2R3_R3W1); | |
2400 | DO_TESTCASE_6x1RR("rlock W1R2/R2R3/W3W1", W1R2_R2R3_W3W1); | |
2401 | ||
cae2ed9a IM |
2402 | printk(" --------------------------------------------------------------------------\n"); |
2403 | ||
2404 | /* | |
2405 | * irq-context testcases: | |
2406 | */ | |
2407 | DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1); | |
2408 | DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A); | |
2409 | DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B); | |
2410 | DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3); | |
2411 | DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4); | |
2412 | DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion); | |
2413 | ||
31e0d747 BF |
2414 | DO_TESTCASE_6x2x2RW("irq read-recursion", irq_read_recursion); |
2415 | DO_TESTCASE_6x2x2RW("irq read-recursion #2", irq_read_recursion2); | |
cae2ed9a | 2416 | |
1de99445 ML |
2417 | ww_tests(); |
2418 | ||
e9181886 BF |
2419 | force_read_lock_recursive = 0; |
2420 | /* | |
2421 | * queued_read_lock() specific test cases can be put here | |
2422 | */ | |
ad56450d BF |
2423 | if (IS_ENABLED(CONFIG_QUEUED_RWLOCKS)) |
2424 | queued_read_lock_tests(); | |
e9181886 | 2425 | |
cae2ed9a IM |
2426 | if (unexpected_testcase_failures) { |
2427 | printk("-----------------------------------------------------------------\n"); | |
2428 | debug_locks = 0; | |
2429 | printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", | |
2430 | unexpected_testcase_failures, testcase_total); | |
2431 | printk("-----------------------------------------------------------------\n"); | |
2432 | } else if (expected_testcase_failures && testcase_successes) { | |
2433 | printk("--------------------------------------------------------\n"); | |
2434 | printk("%3d out of %3d testcases failed, as expected. |\n", | |
2435 | expected_testcase_failures, testcase_total); | |
2436 | printk("----------------------------------------------------\n"); | |
2437 | debug_locks = 1; | |
2438 | } else if (expected_testcase_failures && !testcase_successes) { | |
2439 | printk("--------------------------------------------------------\n"); | |
2440 | printk("All %3d testcases failed, as expected. |\n", | |
2441 | expected_testcase_failures); | |
2442 | printk("----------------------------------------\n"); | |
2443 | debug_locks = 1; | |
2444 | } else { | |
2445 | printk("-------------------------------------------------------\n"); | |
2446 | printk("Good, all %3d testcases passed! |\n", | |
2447 | testcase_successes); | |
2448 | printk("---------------------------------\n"); | |
2449 | debug_locks = 1; | |
2450 | } | |
cdc84d79 | 2451 | lockdep_set_selftest_task(NULL); |
cae2ed9a IM |
2452 | debug_locks_silent = 0; |
2453 | } |