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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 | ||
399 | /* | |
400 | * read_lock(A) | |
401 | * spin_lock(B) | |
402 | * spin_lock(B) | |
403 | * read_lock(A) | |
404 | */ | |
405 | static void rlock_ABBA2(void) | |
406 | { | |
407 | RL(X1); | |
408 | L(Y1); | |
409 | U(Y1); | |
410 | RU(X1); | |
411 | ||
412 | L(Y1); | |
413 | RL(X1); | |
414 | RU(X1); | |
415 | U(Y1); // should NOT fail | |
416 | } | |
417 | ||
418 | static void rwsem_ABBA2(void) | |
419 | { | |
420 | RSL(X1); | |
421 | ML(Y1); | |
422 | MU(Y1); | |
423 | RSU(X1); | |
424 | ||
425 | ML(Y1); | |
426 | RSL(X1); | |
427 | RSU(X1); | |
428 | MU(Y1); // should fail | |
429 | } | |
430 | ||
431 | ||
432 | /* | |
433 | * write_lock(A) | |
434 | * spin_lock(B) | |
435 | * spin_lock(B) | |
436 | * write_lock(A) | |
437 | */ | |
438 | static void rlock_ABBA3(void) | |
439 | { | |
440 | WL(X1); | |
441 | L(Y1); | |
442 | U(Y1); | |
443 | WU(X1); | |
444 | ||
445 | L(Y1); | |
446 | WL(X1); | |
447 | WU(X1); | |
448 | U(Y1); // should fail | |
449 | } | |
450 | ||
451 | static void rwsem_ABBA3(void) | |
452 | { | |
453 | WSL(X1); | |
454 | ML(Y1); | |
455 | MU(Y1); | |
456 | WSU(X1); | |
457 | ||
458 | ML(Y1); | |
459 | WSL(X1); | |
460 | WSU(X1); | |
461 | MU(Y1); // should fail | |
462 | } | |
463 | ||
cae2ed9a IM |
464 | /* |
465 | * ABBA deadlock: | |
466 | */ | |
467 | ||
468 | #define E() \ | |
469 | \ | |
470 | LOCK_UNLOCK_2(A, B); \ | |
471 | LOCK_UNLOCK_2(B, A); /* fail */ | |
472 | ||
473 | /* | |
474 | * 6 testcases: | |
475 | */ | |
476 | #include "locking-selftest-spin.h" | |
477 | GENERATE_TESTCASE(ABBA_spin) | |
478 | #include "locking-selftest-wlock.h" | |
479 | GENERATE_TESTCASE(ABBA_wlock) | |
480 | #include "locking-selftest-rlock.h" | |
481 | GENERATE_TESTCASE(ABBA_rlock) | |
482 | #include "locking-selftest-mutex.h" | |
483 | GENERATE_TESTCASE(ABBA_mutex) | |
484 | #include "locking-selftest-wsem.h" | |
485 | GENERATE_TESTCASE(ABBA_wsem) | |
486 | #include "locking-selftest-rsem.h" | |
487 | GENERATE_TESTCASE(ABBA_rsem) | |
488 | ||
018956d6 PZ |
489 | #ifdef CONFIG_RT_MUTEXES |
490 | #include "locking-selftest-rtmutex.h" | |
491 | GENERATE_TESTCASE(ABBA_rtmutex); | |
492 | #endif | |
493 | ||
cae2ed9a IM |
494 | #undef E |
495 | ||
496 | /* | |
497 | * AB BC CA deadlock: | |
498 | */ | |
499 | ||
500 | #define E() \ | |
501 | \ | |
502 | LOCK_UNLOCK_2(A, B); \ | |
503 | LOCK_UNLOCK_2(B, C); \ | |
504 | LOCK_UNLOCK_2(C, A); /* fail */ | |
505 | ||
506 | /* | |
507 | * 6 testcases: | |
508 | */ | |
509 | #include "locking-selftest-spin.h" | |
510 | GENERATE_TESTCASE(ABBCCA_spin) | |
511 | #include "locking-selftest-wlock.h" | |
512 | GENERATE_TESTCASE(ABBCCA_wlock) | |
513 | #include "locking-selftest-rlock.h" | |
514 | GENERATE_TESTCASE(ABBCCA_rlock) | |
515 | #include "locking-selftest-mutex.h" | |
516 | GENERATE_TESTCASE(ABBCCA_mutex) | |
517 | #include "locking-selftest-wsem.h" | |
518 | GENERATE_TESTCASE(ABBCCA_wsem) | |
519 | #include "locking-selftest-rsem.h" | |
520 | GENERATE_TESTCASE(ABBCCA_rsem) | |
521 | ||
018956d6 PZ |
522 | #ifdef CONFIG_RT_MUTEXES |
523 | #include "locking-selftest-rtmutex.h" | |
524 | GENERATE_TESTCASE(ABBCCA_rtmutex); | |
525 | #endif | |
526 | ||
cae2ed9a IM |
527 | #undef E |
528 | ||
529 | /* | |
530 | * AB CA BC deadlock: | |
531 | */ | |
532 | ||
533 | #define E() \ | |
534 | \ | |
535 | LOCK_UNLOCK_2(A, B); \ | |
536 | LOCK_UNLOCK_2(C, A); \ | |
537 | LOCK_UNLOCK_2(B, C); /* fail */ | |
538 | ||
539 | /* | |
540 | * 6 testcases: | |
541 | */ | |
542 | #include "locking-selftest-spin.h" | |
543 | GENERATE_TESTCASE(ABCABC_spin) | |
544 | #include "locking-selftest-wlock.h" | |
545 | GENERATE_TESTCASE(ABCABC_wlock) | |
546 | #include "locking-selftest-rlock.h" | |
547 | GENERATE_TESTCASE(ABCABC_rlock) | |
548 | #include "locking-selftest-mutex.h" | |
549 | GENERATE_TESTCASE(ABCABC_mutex) | |
550 | #include "locking-selftest-wsem.h" | |
551 | GENERATE_TESTCASE(ABCABC_wsem) | |
552 | #include "locking-selftest-rsem.h" | |
553 | GENERATE_TESTCASE(ABCABC_rsem) | |
554 | ||
018956d6 PZ |
555 | #ifdef CONFIG_RT_MUTEXES |
556 | #include "locking-selftest-rtmutex.h" | |
557 | GENERATE_TESTCASE(ABCABC_rtmutex); | |
558 | #endif | |
559 | ||
cae2ed9a IM |
560 | #undef E |
561 | ||
562 | /* | |
563 | * AB BC CD DA deadlock: | |
564 | */ | |
565 | ||
566 | #define E() \ | |
567 | \ | |
568 | LOCK_UNLOCK_2(A, B); \ | |
569 | LOCK_UNLOCK_2(B, C); \ | |
570 | LOCK_UNLOCK_2(C, D); \ | |
571 | LOCK_UNLOCK_2(D, A); /* fail */ | |
572 | ||
573 | /* | |
574 | * 6 testcases: | |
575 | */ | |
576 | #include "locking-selftest-spin.h" | |
577 | GENERATE_TESTCASE(ABBCCDDA_spin) | |
578 | #include "locking-selftest-wlock.h" | |
579 | GENERATE_TESTCASE(ABBCCDDA_wlock) | |
580 | #include "locking-selftest-rlock.h" | |
581 | GENERATE_TESTCASE(ABBCCDDA_rlock) | |
582 | #include "locking-selftest-mutex.h" | |
583 | GENERATE_TESTCASE(ABBCCDDA_mutex) | |
584 | #include "locking-selftest-wsem.h" | |
585 | GENERATE_TESTCASE(ABBCCDDA_wsem) | |
586 | #include "locking-selftest-rsem.h" | |
587 | GENERATE_TESTCASE(ABBCCDDA_rsem) | |
588 | ||
018956d6 PZ |
589 | #ifdef CONFIG_RT_MUTEXES |
590 | #include "locking-selftest-rtmutex.h" | |
591 | GENERATE_TESTCASE(ABBCCDDA_rtmutex); | |
592 | #endif | |
593 | ||
cae2ed9a IM |
594 | #undef E |
595 | ||
596 | /* | |
597 | * AB CD BD DA deadlock: | |
598 | */ | |
599 | #define E() \ | |
600 | \ | |
601 | LOCK_UNLOCK_2(A, B); \ | |
602 | LOCK_UNLOCK_2(C, D); \ | |
603 | LOCK_UNLOCK_2(B, D); \ | |
604 | LOCK_UNLOCK_2(D, A); /* fail */ | |
605 | ||
606 | /* | |
607 | * 6 testcases: | |
608 | */ | |
609 | #include "locking-selftest-spin.h" | |
610 | GENERATE_TESTCASE(ABCDBDDA_spin) | |
611 | #include "locking-selftest-wlock.h" | |
612 | GENERATE_TESTCASE(ABCDBDDA_wlock) | |
613 | #include "locking-selftest-rlock.h" | |
614 | GENERATE_TESTCASE(ABCDBDDA_rlock) | |
615 | #include "locking-selftest-mutex.h" | |
616 | GENERATE_TESTCASE(ABCDBDDA_mutex) | |
617 | #include "locking-selftest-wsem.h" | |
618 | GENERATE_TESTCASE(ABCDBDDA_wsem) | |
619 | #include "locking-selftest-rsem.h" | |
620 | GENERATE_TESTCASE(ABCDBDDA_rsem) | |
621 | ||
018956d6 PZ |
622 | #ifdef CONFIG_RT_MUTEXES |
623 | #include "locking-selftest-rtmutex.h" | |
624 | GENERATE_TESTCASE(ABCDBDDA_rtmutex); | |
625 | #endif | |
626 | ||
cae2ed9a IM |
627 | #undef E |
628 | ||
629 | /* | |
630 | * AB CD BC DA deadlock: | |
631 | */ | |
632 | #define E() \ | |
633 | \ | |
634 | LOCK_UNLOCK_2(A, B); \ | |
635 | LOCK_UNLOCK_2(C, D); \ | |
636 | LOCK_UNLOCK_2(B, C); \ | |
637 | LOCK_UNLOCK_2(D, A); /* fail */ | |
638 | ||
639 | /* | |
640 | * 6 testcases: | |
641 | */ | |
642 | #include "locking-selftest-spin.h" | |
643 | GENERATE_TESTCASE(ABCDBCDA_spin) | |
644 | #include "locking-selftest-wlock.h" | |
645 | GENERATE_TESTCASE(ABCDBCDA_wlock) | |
646 | #include "locking-selftest-rlock.h" | |
647 | GENERATE_TESTCASE(ABCDBCDA_rlock) | |
648 | #include "locking-selftest-mutex.h" | |
649 | GENERATE_TESTCASE(ABCDBCDA_mutex) | |
650 | #include "locking-selftest-wsem.h" | |
651 | GENERATE_TESTCASE(ABCDBCDA_wsem) | |
652 | #include "locking-selftest-rsem.h" | |
653 | GENERATE_TESTCASE(ABCDBCDA_rsem) | |
654 | ||
018956d6 PZ |
655 | #ifdef CONFIG_RT_MUTEXES |
656 | #include "locking-selftest-rtmutex.h" | |
657 | GENERATE_TESTCASE(ABCDBCDA_rtmutex); | |
658 | #endif | |
659 | ||
cae2ed9a IM |
660 | #undef E |
661 | ||
662 | /* | |
663 | * Double unlock: | |
664 | */ | |
665 | #define E() \ | |
666 | \ | |
667 | LOCK(A); \ | |
668 | UNLOCK(A); \ | |
669 | UNLOCK(A); /* fail */ | |
670 | ||
671 | /* | |
672 | * 6 testcases: | |
673 | */ | |
674 | #include "locking-selftest-spin.h" | |
675 | GENERATE_TESTCASE(double_unlock_spin) | |
676 | #include "locking-selftest-wlock.h" | |
677 | GENERATE_TESTCASE(double_unlock_wlock) | |
678 | #include "locking-selftest-rlock.h" | |
679 | GENERATE_TESTCASE(double_unlock_rlock) | |
680 | #include "locking-selftest-mutex.h" | |
681 | GENERATE_TESTCASE(double_unlock_mutex) | |
682 | #include "locking-selftest-wsem.h" | |
683 | GENERATE_TESTCASE(double_unlock_wsem) | |
684 | #include "locking-selftest-rsem.h" | |
685 | GENERATE_TESTCASE(double_unlock_rsem) | |
686 | ||
018956d6 PZ |
687 | #ifdef CONFIG_RT_MUTEXES |
688 | #include "locking-selftest-rtmutex.h" | |
689 | GENERATE_TESTCASE(double_unlock_rtmutex); | |
690 | #endif | |
691 | ||
cae2ed9a IM |
692 | #undef E |
693 | ||
cae2ed9a IM |
694 | /* |
695 | * initializing a held lock: | |
696 | */ | |
697 | #define E() \ | |
698 | \ | |
699 | LOCK(A); \ | |
700 | INIT(A); /* fail */ | |
701 | ||
702 | /* | |
703 | * 6 testcases: | |
704 | */ | |
705 | #include "locking-selftest-spin.h" | |
706 | GENERATE_TESTCASE(init_held_spin) | |
707 | #include "locking-selftest-wlock.h" | |
708 | GENERATE_TESTCASE(init_held_wlock) | |
709 | #include "locking-selftest-rlock.h" | |
710 | GENERATE_TESTCASE(init_held_rlock) | |
711 | #include "locking-selftest-mutex.h" | |
712 | GENERATE_TESTCASE(init_held_mutex) | |
713 | #include "locking-selftest-wsem.h" | |
714 | GENERATE_TESTCASE(init_held_wsem) | |
715 | #include "locking-selftest-rsem.h" | |
716 | GENERATE_TESTCASE(init_held_rsem) | |
717 | ||
018956d6 PZ |
718 | #ifdef CONFIG_RT_MUTEXES |
719 | #include "locking-selftest-rtmutex.h" | |
720 | GENERATE_TESTCASE(init_held_rtmutex); | |
721 | #endif | |
722 | ||
cae2ed9a IM |
723 | #undef E |
724 | ||
725 | /* | |
726 | * locking an irq-safe lock with irqs enabled: | |
727 | */ | |
728 | #define E1() \ | |
729 | \ | |
730 | IRQ_ENTER(); \ | |
731 | LOCK(A); \ | |
732 | UNLOCK(A); \ | |
733 | IRQ_EXIT(); | |
734 | ||
735 | #define E2() \ | |
736 | \ | |
737 | LOCK(A); \ | |
738 | UNLOCK(A); | |
739 | ||
740 | /* | |
741 | * Generate 24 testcases: | |
742 | */ | |
743 | #include "locking-selftest-spin-hardirq.h" | |
744 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) | |
745 | ||
746 | #include "locking-selftest-rlock-hardirq.h" | |
747 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) | |
748 | ||
749 | #include "locking-selftest-wlock-hardirq.h" | |
750 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock) | |
751 | ||
752 | #include "locking-selftest-spin-softirq.h" | |
753 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin) | |
754 | ||
755 | #include "locking-selftest-rlock-softirq.h" | |
756 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) | |
757 | ||
758 | #include "locking-selftest-wlock-softirq.h" | |
759 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) | |
760 | ||
761 | #undef E1 | |
762 | #undef E2 | |
763 | ||
764 | /* | |
765 | * Enabling hardirqs with a softirq-safe lock held: | |
766 | */ | |
767 | #define E1() \ | |
768 | \ | |
769 | SOFTIRQ_ENTER(); \ | |
770 | LOCK(A); \ | |
771 | UNLOCK(A); \ | |
772 | SOFTIRQ_EXIT(); | |
773 | ||
774 | #define E2() \ | |
775 | \ | |
776 | HARDIRQ_DISABLE(); \ | |
777 | LOCK(A); \ | |
778 | HARDIRQ_ENABLE(); \ | |
779 | UNLOCK(A); | |
780 | ||
781 | /* | |
782 | * Generate 12 testcases: | |
783 | */ | |
784 | #include "locking-selftest-spin.h" | |
785 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin) | |
786 | ||
787 | #include "locking-selftest-wlock.h" | |
788 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock) | |
789 | ||
790 | #include "locking-selftest-rlock.h" | |
791 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) | |
792 | ||
793 | #undef E1 | |
794 | #undef E2 | |
795 | ||
796 | /* | |
797 | * Enabling irqs with an irq-safe lock held: | |
798 | */ | |
799 | #define E1() \ | |
800 | \ | |
801 | IRQ_ENTER(); \ | |
802 | LOCK(A); \ | |
803 | UNLOCK(A); \ | |
804 | IRQ_EXIT(); | |
805 | ||
806 | #define E2() \ | |
807 | \ | |
808 | IRQ_DISABLE(); \ | |
809 | LOCK(A); \ | |
810 | IRQ_ENABLE(); \ | |
811 | UNLOCK(A); | |
812 | ||
813 | /* | |
814 | * Generate 24 testcases: | |
815 | */ | |
816 | #include "locking-selftest-spin-hardirq.h" | |
817 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) | |
818 | ||
819 | #include "locking-selftest-rlock-hardirq.h" | |
820 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) | |
821 | ||
822 | #include "locking-selftest-wlock-hardirq.h" | |
823 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock) | |
824 | ||
825 | #include "locking-selftest-spin-softirq.h" | |
826 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin) | |
827 | ||
828 | #include "locking-selftest-rlock-softirq.h" | |
829 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) | |
830 | ||
831 | #include "locking-selftest-wlock-softirq.h" | |
832 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) | |
833 | ||
834 | #undef E1 | |
835 | #undef E2 | |
836 | ||
837 | /* | |
838 | * Acquiring a irq-unsafe lock while holding an irq-safe-lock: | |
839 | */ | |
840 | #define E1() \ | |
841 | \ | |
842 | LOCK(A); \ | |
843 | LOCK(B); \ | |
844 | UNLOCK(B); \ | |
845 | UNLOCK(A); \ | |
846 | ||
847 | #define E2() \ | |
848 | \ | |
849 | LOCK(B); \ | |
850 | UNLOCK(B); | |
851 | ||
852 | #define E3() \ | |
853 | \ | |
854 | IRQ_ENTER(); \ | |
855 | LOCK(A); \ | |
856 | UNLOCK(A); \ | |
857 | IRQ_EXIT(); | |
858 | ||
859 | /* | |
860 | * Generate 36 testcases: | |
861 | */ | |
862 | #include "locking-selftest-spin-hardirq.h" | |
863 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) | |
864 | ||
865 | #include "locking-selftest-rlock-hardirq.h" | |
866 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) | |
867 | ||
868 | #include "locking-selftest-wlock-hardirq.h" | |
869 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock) | |
870 | ||
871 | #include "locking-selftest-spin-softirq.h" | |
872 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin) | |
873 | ||
874 | #include "locking-selftest-rlock-softirq.h" | |
875 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) | |
876 | ||
877 | #include "locking-selftest-wlock-softirq.h" | |
878 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) | |
879 | ||
880 | #undef E1 | |
881 | #undef E2 | |
882 | #undef E3 | |
883 | ||
884 | /* | |
885 | * If a lock turns into softirq-safe, but earlier it took | |
886 | * a softirq-unsafe lock: | |
887 | */ | |
888 | ||
889 | #define E1() \ | |
890 | IRQ_DISABLE(); \ | |
891 | LOCK(A); \ | |
892 | LOCK(B); \ | |
893 | UNLOCK(B); \ | |
894 | UNLOCK(A); \ | |
895 | IRQ_ENABLE(); | |
896 | ||
897 | #define E2() \ | |
898 | LOCK(B); \ | |
899 | UNLOCK(B); | |
900 | ||
901 | #define E3() \ | |
902 | IRQ_ENTER(); \ | |
903 | LOCK(A); \ | |
904 | UNLOCK(A); \ | |
905 | IRQ_EXIT(); | |
906 | ||
907 | /* | |
908 | * Generate 36 testcases: | |
909 | */ | |
910 | #include "locking-selftest-spin-hardirq.h" | |
911 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) | |
912 | ||
913 | #include "locking-selftest-rlock-hardirq.h" | |
914 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) | |
915 | ||
916 | #include "locking-selftest-wlock-hardirq.h" | |
917 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock) | |
918 | ||
919 | #include "locking-selftest-spin-softirq.h" | |
920 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin) | |
921 | ||
922 | #include "locking-selftest-rlock-softirq.h" | |
923 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) | |
924 | ||
925 | #include "locking-selftest-wlock-softirq.h" | |
926 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) | |
927 | ||
928 | #undef E1 | |
929 | #undef E2 | |
930 | #undef E3 | |
931 | ||
932 | /* | |
933 | * read-lock / write-lock irq inversion. | |
934 | * | |
935 | * Deadlock scenario: | |
936 | * | |
937 | * CPU#1 is at #1, i.e. it has write-locked A, but has not | |
938 | * taken B yet. | |
939 | * | |
940 | * CPU#2 is at #2, i.e. it has locked B. | |
941 | * | |
942 | * Hardirq hits CPU#2 at point #2 and is trying to read-lock A. | |
943 | * | |
944 | * The deadlock occurs because CPU#1 will spin on B, and CPU#2 | |
945 | * will spin on A. | |
946 | */ | |
947 | ||
948 | #define E1() \ | |
949 | \ | |
950 | IRQ_DISABLE(); \ | |
951 | WL(A); \ | |
952 | LOCK(B); \ | |
953 | UNLOCK(B); \ | |
954 | WU(A); \ | |
955 | IRQ_ENABLE(); | |
956 | ||
957 | #define E2() \ | |
958 | \ | |
959 | LOCK(B); \ | |
960 | UNLOCK(B); | |
961 | ||
962 | #define E3() \ | |
963 | \ | |
964 | IRQ_ENTER(); \ | |
965 | RL(A); \ | |
966 | RU(A); \ | |
967 | IRQ_EXIT(); | |
968 | ||
969 | /* | |
970 | * Generate 36 testcases: | |
971 | */ | |
972 | #include "locking-selftest-spin-hardirq.h" | |
973 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin) | |
974 | ||
975 | #include "locking-selftest-rlock-hardirq.h" | |
976 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock) | |
977 | ||
978 | #include "locking-selftest-wlock-hardirq.h" | |
979 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock) | |
980 | ||
981 | #include "locking-selftest-spin-softirq.h" | |
982 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin) | |
983 | ||
984 | #include "locking-selftest-rlock-softirq.h" | |
985 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock) | |
986 | ||
987 | #include "locking-selftest-wlock-softirq.h" | |
988 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) | |
989 | ||
990 | #undef E1 | |
991 | #undef E2 | |
992 | #undef E3 | |
993 | ||
994 | /* | |
995 | * read-lock / write-lock recursion that is actually safe. | |
996 | */ | |
997 | ||
998 | #define E1() \ | |
999 | \ | |
1000 | IRQ_DISABLE(); \ | |
1001 | WL(A); \ | |
1002 | WU(A); \ | |
1003 | IRQ_ENABLE(); | |
1004 | ||
1005 | #define E2() \ | |
1006 | \ | |
1007 | RL(A); \ | |
1008 | RU(A); \ | |
1009 | ||
1010 | #define E3() \ | |
1011 | \ | |
1012 | IRQ_ENTER(); \ | |
1013 | RL(A); \ | |
1014 | L(B); \ | |
1015 | U(B); \ | |
1016 | RU(A); \ | |
1017 | IRQ_EXIT(); | |
1018 | ||
1019 | /* | |
1020 | * Generate 12 testcases: | |
1021 | */ | |
1022 | #include "locking-selftest-hardirq.h" | |
1023 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard) | |
1024 | ||
1025 | #include "locking-selftest-softirq.h" | |
1026 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft) | |
1027 | ||
1028 | #undef E1 | |
1029 | #undef E2 | |
1030 | #undef E3 | |
1031 | ||
1032 | /* | |
1033 | * read-lock / write-lock recursion that is unsafe. | |
1034 | */ | |
1035 | ||
1036 | #define E1() \ | |
1037 | \ | |
1038 | IRQ_DISABLE(); \ | |
1039 | L(B); \ | |
1040 | WL(A); \ | |
1041 | WU(A); \ | |
1042 | U(B); \ | |
1043 | IRQ_ENABLE(); | |
1044 | ||
1045 | #define E2() \ | |
1046 | \ | |
1047 | RL(A); \ | |
1048 | RU(A); \ | |
1049 | ||
1050 | #define E3() \ | |
1051 | \ | |
1052 | IRQ_ENTER(); \ | |
1053 | L(B); \ | |
1054 | U(B); \ | |
1055 | IRQ_EXIT(); | |
1056 | ||
1057 | /* | |
1058 | * Generate 12 testcases: | |
1059 | */ | |
1060 | #include "locking-selftest-hardirq.h" | |
1061 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard) | |
1062 | ||
1063 | #include "locking-selftest-softirq.h" | |
1064 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft) | |
1065 | ||
cae2ed9a IM |
1066 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1067 | # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) | |
1068 | # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) | |
1069 | # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) | |
1070 | # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) | |
1de99445 | 1071 | # define I_WW(x) lockdep_reset_lock(&x.dep_map) |
018956d6 PZ |
1072 | #ifdef CONFIG_RT_MUTEXES |
1073 | # define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map) | |
1074 | #endif | |
cae2ed9a IM |
1075 | #else |
1076 | # define I_SPINLOCK(x) | |
1077 | # define I_RWLOCK(x) | |
1078 | # define I_MUTEX(x) | |
1079 | # define I_RWSEM(x) | |
1de99445 | 1080 | # define I_WW(x) |
cae2ed9a IM |
1081 | #endif |
1082 | ||
018956d6 PZ |
1083 | #ifndef I_RTMUTEX |
1084 | # define I_RTMUTEX(x) | |
1085 | #endif | |
1086 | ||
1087 | #ifdef CONFIG_RT_MUTEXES | |
1088 | #define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x) | |
1089 | #else | |
1090 | #define I2_RTMUTEX(x) | |
1091 | #endif | |
1092 | ||
cae2ed9a IM |
1093 | #define I1(x) \ |
1094 | do { \ | |
1095 | I_SPINLOCK(x); \ | |
1096 | I_RWLOCK(x); \ | |
1097 | I_MUTEX(x); \ | |
1098 | I_RWSEM(x); \ | |
018956d6 | 1099 | I_RTMUTEX(x); \ |
cae2ed9a IM |
1100 | } while (0) |
1101 | ||
1102 | #define I2(x) \ | |
1103 | do { \ | |
9fb1b90c | 1104 | raw_spin_lock_init(&lock_##x); \ |
cae2ed9a IM |
1105 | rwlock_init(&rwlock_##x); \ |
1106 | mutex_init(&mutex_##x); \ | |
1107 | init_rwsem(&rwsem_##x); \ | |
018956d6 | 1108 | I2_RTMUTEX(x); \ |
cae2ed9a IM |
1109 | } while (0) |
1110 | ||
1111 | static void reset_locks(void) | |
1112 | { | |
1113 | local_irq_disable(); | |
1de99445 ML |
1114 | lockdep_free_key_range(&ww_lockdep.acquire_key, 1); |
1115 | lockdep_free_key_range(&ww_lockdep.mutex_key, 1); | |
1116 | ||
cae2ed9a IM |
1117 | I1(A); I1(B); I1(C); I1(D); |
1118 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); | |
f3cf139e | 1119 | I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
cae2ed9a IM |
1120 | lockdep_reset(); |
1121 | I2(A); I2(B); I2(C); I2(D); | |
1122 | init_shared_classes(); | |
1de99445 | 1123 | |
f3cf139e | 1124 | ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
1de99445 ML |
1125 | memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2)); |
1126 | memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key)); | |
1127 | memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key)); | |
cae2ed9a IM |
1128 | local_irq_enable(); |
1129 | } | |
1130 | ||
1131 | #undef I | |
1132 | ||
1133 | static int testcase_total; | |
1134 | static int testcase_successes; | |
1135 | static int expected_testcase_failures; | |
1136 | static int unexpected_testcase_failures; | |
1137 | ||
1138 | static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) | |
1139 | { | |
1140 | unsigned long saved_preempt_count = preempt_count(); | |
cae2ed9a IM |
1141 | |
1142 | WARN_ON(irqs_disabled()); | |
1143 | ||
1144 | testcase_fn(); | |
1145 | /* | |
1146 | * Filter out expected failures: | |
1147 | */ | |
1148 | #ifndef CONFIG_PROVE_LOCKING | |
166989e3 | 1149 | if (expected == FAILURE && debug_locks) { |
1de99445 | 1150 | expected_testcase_failures++; |
25139409 | 1151 | pr_cont("failed|"); |
166989e3 ML |
1152 | } |
1153 | else | |
1154 | #endif | |
1155 | if (debug_locks != expected) { | |
1de99445 | 1156 | unexpected_testcase_failures++; |
25139409 | 1157 | pr_cont("FAILED|"); |
cae2ed9a IM |
1158 | } else { |
1159 | testcase_successes++; | |
25139409 | 1160 | pr_cont(" ok |"); |
cae2ed9a IM |
1161 | } |
1162 | testcase_total++; | |
1163 | ||
1164 | if (debug_locks_verbose) | |
25139409 | 1165 | pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n", |
cae2ed9a IM |
1166 | lockclass_mask, debug_locks, expected); |
1167 | /* | |
1168 | * Some tests (e.g. double-unlock) might corrupt the preemption | |
1169 | * count, so restore it: | |
1170 | */ | |
4a2b4b22 | 1171 | preempt_count_set(saved_preempt_count); |
cae2ed9a IM |
1172 | #ifdef CONFIG_TRACE_IRQFLAGS |
1173 | if (softirq_count()) | |
1174 | current->softirqs_enabled = 0; | |
1175 | else | |
1176 | current->softirqs_enabled = 1; | |
1177 | #endif | |
1178 | ||
1179 | reset_locks(); | |
1180 | } | |
1181 | ||
018956d6 PZ |
1182 | #ifdef CONFIG_RT_MUTEXES |
1183 | #define dotest_rt(fn, e, m) dotest((fn), (e), (m)) | |
1184 | #else | |
1185 | #define dotest_rt(fn, e, m) | |
1186 | #endif | |
1187 | ||
cae2ed9a IM |
1188 | static inline void print_testname(const char *testname) |
1189 | { | |
1190 | printk("%33s:", testname); | |
1191 | } | |
1192 | ||
1193 | #define DO_TESTCASE_1(desc, name, nr) \ | |
1194 | print_testname(desc"/"#nr); \ | |
1195 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1196 | pr_cont("\n"); |
cae2ed9a IM |
1197 | |
1198 | #define DO_TESTCASE_1B(desc, name, nr) \ | |
1199 | print_testname(desc"/"#nr); \ | |
1200 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
25139409 | 1201 | pr_cont("\n"); |
cae2ed9a IM |
1202 | |
1203 | #define DO_TESTCASE_3(desc, name, nr) \ | |
1204 | print_testname(desc"/"#nr); \ | |
1205 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ | |
1206 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1207 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1208 | pr_cont("\n"); |
cae2ed9a IM |
1209 | |
1210 | #define DO_TESTCASE_3RW(desc, name, nr) \ | |
1211 | print_testname(desc"/"#nr); \ | |
1212 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ | |
1213 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1214 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1215 | pr_cont("\n"); |
cae2ed9a IM |
1216 | |
1217 | #define DO_TESTCASE_6(desc, name) \ | |
1218 | print_testname(desc); \ | |
1219 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1220 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1221 | dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1222 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1223 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1224 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1225 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1226 | pr_cont("\n"); |
cae2ed9a IM |
1227 | |
1228 | #define DO_TESTCASE_6_SUCCESS(desc, name) \ | |
1229 | print_testname(desc); \ | |
1230 | dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ | |
1231 | dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1232 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1233 | dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ | |
1234 | dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1235 | dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
018956d6 | 1236 | dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \ |
25139409 | 1237 | pr_cont("\n"); |
cae2ed9a IM |
1238 | |
1239 | /* | |
1240 | * 'read' variant: rlocks must not trigger. | |
1241 | */ | |
1242 | #define DO_TESTCASE_6R(desc, name) \ | |
1243 | print_testname(desc); \ | |
1244 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1245 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1246 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1247 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1248 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1249 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1250 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1251 | pr_cont("\n"); |
cae2ed9a IM |
1252 | |
1253 | #define DO_TESTCASE_2I(desc, name, nr) \ | |
1254 | DO_TESTCASE_1("hard-"desc, name##_hard, nr); \ | |
1255 | DO_TESTCASE_1("soft-"desc, name##_soft, nr); | |
1256 | ||
1257 | #define DO_TESTCASE_2IB(desc, name, nr) \ | |
1258 | DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \ | |
1259 | DO_TESTCASE_1B("soft-"desc, name##_soft, nr); | |
1260 | ||
1261 | #define DO_TESTCASE_6I(desc, name, nr) \ | |
1262 | DO_TESTCASE_3("hard-"desc, name##_hard, nr); \ | |
1263 | DO_TESTCASE_3("soft-"desc, name##_soft, nr); | |
1264 | ||
1265 | #define DO_TESTCASE_6IRW(desc, name, nr) \ | |
1266 | DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \ | |
1267 | DO_TESTCASE_3RW("soft-"desc, name##_soft, nr); | |
1268 | ||
1269 | #define DO_TESTCASE_2x3(desc, name) \ | |
1270 | DO_TESTCASE_3(desc, name, 12); \ | |
1271 | DO_TESTCASE_3(desc, name, 21); | |
1272 | ||
1273 | #define DO_TESTCASE_2x6(desc, name) \ | |
1274 | DO_TESTCASE_6I(desc, name, 12); \ | |
1275 | DO_TESTCASE_6I(desc, name, 21); | |
1276 | ||
1277 | #define DO_TESTCASE_6x2(desc, name) \ | |
1278 | DO_TESTCASE_2I(desc, name, 123); \ | |
1279 | DO_TESTCASE_2I(desc, name, 132); \ | |
1280 | DO_TESTCASE_2I(desc, name, 213); \ | |
1281 | DO_TESTCASE_2I(desc, name, 231); \ | |
1282 | DO_TESTCASE_2I(desc, name, 312); \ | |
1283 | DO_TESTCASE_2I(desc, name, 321); | |
1284 | ||
1285 | #define DO_TESTCASE_6x2B(desc, name) \ | |
1286 | DO_TESTCASE_2IB(desc, name, 123); \ | |
1287 | DO_TESTCASE_2IB(desc, name, 132); \ | |
1288 | DO_TESTCASE_2IB(desc, name, 213); \ | |
1289 | DO_TESTCASE_2IB(desc, name, 231); \ | |
1290 | DO_TESTCASE_2IB(desc, name, 312); \ | |
1291 | DO_TESTCASE_2IB(desc, name, 321); | |
1292 | ||
1293 | #define DO_TESTCASE_6x6(desc, name) \ | |
1294 | DO_TESTCASE_6I(desc, name, 123); \ | |
1295 | DO_TESTCASE_6I(desc, name, 132); \ | |
1296 | DO_TESTCASE_6I(desc, name, 213); \ | |
1297 | DO_TESTCASE_6I(desc, name, 231); \ | |
1298 | DO_TESTCASE_6I(desc, name, 312); \ | |
1299 | DO_TESTCASE_6I(desc, name, 321); | |
1300 | ||
1301 | #define DO_TESTCASE_6x6RW(desc, name) \ | |
1302 | DO_TESTCASE_6IRW(desc, name, 123); \ | |
1303 | DO_TESTCASE_6IRW(desc, name, 132); \ | |
1304 | DO_TESTCASE_6IRW(desc, name, 213); \ | |
1305 | DO_TESTCASE_6IRW(desc, name, 231); \ | |
1306 | DO_TESTCASE_6IRW(desc, name, 312); \ | |
1307 | DO_TESTCASE_6IRW(desc, name, 321); | |
1308 | ||
1de99445 ML |
1309 | static void ww_test_fail_acquire(void) |
1310 | { | |
1311 | int ret; | |
1312 | ||
1313 | WWAI(&t); | |
1314 | t.stamp++; | |
1315 | ||
1316 | ret = WWL(&o, &t); | |
1317 | ||
1318 | if (WARN_ON(!o.ctx) || | |
1319 | WARN_ON(ret)) | |
1320 | return; | |
1321 | ||
1322 | /* No lockdep test, pure API */ | |
1323 | ret = WWL(&o, &t); | |
1324 | WARN_ON(ret != -EALREADY); | |
1325 | ||
1326 | ret = WWT(&o); | |
1327 | WARN_ON(ret); | |
1328 | ||
1329 | t2 = t; | |
1330 | t2.stamp++; | |
1331 | ret = WWL(&o, &t2); | |
1332 | WARN_ON(ret != -EDEADLK); | |
1333 | WWU(&o); | |
1334 | ||
1335 | if (WWT(&o)) | |
1336 | WWU(&o); | |
1337 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
1338 | else | |
1339 | DEBUG_LOCKS_WARN_ON(1); | |
1340 | #endif | |
1341 | } | |
1342 | ||
2fe3d4b1 ML |
1343 | static void ww_test_normal(void) |
1344 | { | |
1345 | int ret; | |
1346 | ||
1347 | WWAI(&t); | |
1348 | ||
1349 | /* | |
1350 | * None of the ww_mutex codepaths should be taken in the 'normal' | |
1351 | * mutex calls. The easiest way to verify this is by using the | |
1352 | * normal mutex calls, and making sure o.ctx is unmodified. | |
1353 | */ | |
1354 | ||
1355 | /* mutex_lock (and indirectly, mutex_lock_nested) */ | |
1356 | o.ctx = (void *)~0UL; | |
1357 | mutex_lock(&o.base); | |
1358 | mutex_unlock(&o.base); | |
1359 | WARN_ON(o.ctx != (void *)~0UL); | |
1360 | ||
1361 | /* mutex_lock_interruptible (and *_nested) */ | |
1362 | o.ctx = (void *)~0UL; | |
1363 | ret = mutex_lock_interruptible(&o.base); | |
1364 | if (!ret) | |
1365 | mutex_unlock(&o.base); | |
1366 | else | |
1367 | WARN_ON(1); | |
1368 | WARN_ON(o.ctx != (void *)~0UL); | |
1369 | ||
1370 | /* mutex_lock_killable (and *_nested) */ | |
1371 | o.ctx = (void *)~0UL; | |
1372 | ret = mutex_lock_killable(&o.base); | |
1373 | if (!ret) | |
1374 | mutex_unlock(&o.base); | |
1375 | else | |
1376 | WARN_ON(1); | |
1377 | WARN_ON(o.ctx != (void *)~0UL); | |
1378 | ||
1379 | /* trylock, succeeding */ | |
1380 | o.ctx = (void *)~0UL; | |
1381 | ret = mutex_trylock(&o.base); | |
1382 | WARN_ON(!ret); | |
1383 | if (ret) | |
1384 | mutex_unlock(&o.base); | |
1385 | else | |
1386 | WARN_ON(1); | |
1387 | WARN_ON(o.ctx != (void *)~0UL); | |
1388 | ||
1389 | /* trylock, failing */ | |
1390 | o.ctx = (void *)~0UL; | |
1391 | mutex_lock(&o.base); | |
1392 | ret = mutex_trylock(&o.base); | |
1393 | WARN_ON(ret); | |
1394 | mutex_unlock(&o.base); | |
1395 | WARN_ON(o.ctx != (void *)~0UL); | |
1396 | ||
1397 | /* nest_lock */ | |
1398 | o.ctx = (void *)~0UL; | |
1399 | mutex_lock_nest_lock(&o.base, &t); | |
1400 | mutex_unlock(&o.base); | |
1401 | WARN_ON(o.ctx != (void *)~0UL); | |
1402 | } | |
1403 | ||
1de99445 ML |
1404 | static void ww_test_two_contexts(void) |
1405 | { | |
1406 | WWAI(&t); | |
1407 | WWAI(&t2); | |
1408 | } | |
1409 | ||
1410 | static void ww_test_diff_class(void) | |
1411 | { | |
1412 | WWAI(&t); | |
1413 | #ifdef CONFIG_DEBUG_MUTEXES | |
1414 | t.ww_class = NULL; | |
1415 | #endif | |
1416 | WWL(&o, &t); | |
1417 | } | |
1418 | ||
1419 | static void ww_test_context_done_twice(void) | |
1420 | { | |
1421 | WWAI(&t); | |
1422 | WWAD(&t); | |
1423 | WWAD(&t); | |
1424 | WWAF(&t); | |
1425 | } | |
1426 | ||
1427 | static void ww_test_context_unlock_twice(void) | |
1428 | { | |
1429 | WWAI(&t); | |
1430 | WWAD(&t); | |
1431 | WWAF(&t); | |
1432 | WWAF(&t); | |
1433 | } | |
1434 | ||
1435 | static void ww_test_context_fini_early(void) | |
1436 | { | |
1437 | WWAI(&t); | |
1438 | WWL(&o, &t); | |
1439 | WWAD(&t); | |
1440 | WWAF(&t); | |
1441 | } | |
1442 | ||
1443 | static void ww_test_context_lock_after_done(void) | |
1444 | { | |
1445 | WWAI(&t); | |
1446 | WWAD(&t); | |
1447 | WWL(&o, &t); | |
1448 | } | |
1449 | ||
1450 | static void ww_test_object_unlock_twice(void) | |
1451 | { | |
1452 | WWL1(&o); | |
1453 | WWU(&o); | |
1454 | WWU(&o); | |
1455 | } | |
1456 | ||
1457 | static void ww_test_object_lock_unbalanced(void) | |
1458 | { | |
1459 | WWAI(&t); | |
1460 | WWL(&o, &t); | |
1461 | t.acquired = 0; | |
1462 | WWU(&o); | |
1463 | WWAF(&t); | |
1464 | } | |
1465 | ||
1466 | static void ww_test_object_lock_stale_context(void) | |
1467 | { | |
1468 | WWAI(&t); | |
1469 | o.ctx = &t2; | |
1470 | WWL(&o, &t); | |
1471 | } | |
1472 | ||
f3cf139e ML |
1473 | static void ww_test_edeadlk_normal(void) |
1474 | { | |
1475 | int ret; | |
1476 | ||
1477 | mutex_lock(&o2.base); | |
1478 | o2.ctx = &t2; | |
5facae4f | 1479 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1480 | |
1481 | WWAI(&t); | |
1482 | t2 = t; | |
1483 | t2.stamp--; | |
1484 | ||
1485 | ret = WWL(&o, &t); | |
1486 | WARN_ON(ret); | |
1487 | ||
1488 | ret = WWL(&o2, &t); | |
1489 | WARN_ON(ret != -EDEADLK); | |
1490 | ||
1491 | o2.ctx = NULL; | |
1492 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1493 | mutex_unlock(&o2.base); | |
1494 | WWU(&o); | |
1495 | ||
1496 | WWL(&o2, &t); | |
1497 | } | |
1498 | ||
1499 | static void ww_test_edeadlk_normal_slow(void) | |
1500 | { | |
1501 | int ret; | |
1502 | ||
1503 | mutex_lock(&o2.base); | |
5facae4f | 1504 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1505 | o2.ctx = &t2; |
1506 | ||
1507 | WWAI(&t); | |
1508 | t2 = t; | |
1509 | t2.stamp--; | |
1510 | ||
1511 | ret = WWL(&o, &t); | |
1512 | WARN_ON(ret); | |
1513 | ||
1514 | ret = WWL(&o2, &t); | |
1515 | WARN_ON(ret != -EDEADLK); | |
1516 | ||
1517 | o2.ctx = NULL; | |
1518 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1519 | mutex_unlock(&o2.base); | |
1520 | WWU(&o); | |
1521 | ||
1522 | ww_mutex_lock_slow(&o2, &t); | |
1523 | } | |
1524 | ||
1525 | static void ww_test_edeadlk_no_unlock(void) | |
1526 | { | |
1527 | int ret; | |
1528 | ||
1529 | mutex_lock(&o2.base); | |
1530 | o2.ctx = &t2; | |
5facae4f | 1531 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1532 | |
1533 | WWAI(&t); | |
1534 | t2 = t; | |
1535 | t2.stamp--; | |
1536 | ||
1537 | ret = WWL(&o, &t); | |
1538 | WARN_ON(ret); | |
1539 | ||
1540 | ret = WWL(&o2, &t); | |
1541 | WARN_ON(ret != -EDEADLK); | |
1542 | ||
1543 | o2.ctx = NULL; | |
1544 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1545 | mutex_unlock(&o2.base); | |
1546 | ||
1547 | WWL(&o2, &t); | |
1548 | } | |
1549 | ||
1550 | static void ww_test_edeadlk_no_unlock_slow(void) | |
1551 | { | |
1552 | int ret; | |
1553 | ||
1554 | mutex_lock(&o2.base); | |
5facae4f | 1555 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1556 | o2.ctx = &t2; |
1557 | ||
1558 | WWAI(&t); | |
1559 | t2 = t; | |
1560 | t2.stamp--; | |
1561 | ||
1562 | ret = WWL(&o, &t); | |
1563 | WARN_ON(ret); | |
1564 | ||
1565 | ret = WWL(&o2, &t); | |
1566 | WARN_ON(ret != -EDEADLK); | |
1567 | ||
1568 | o2.ctx = NULL; | |
1569 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1570 | mutex_unlock(&o2.base); | |
1571 | ||
1572 | ww_mutex_lock_slow(&o2, &t); | |
1573 | } | |
1574 | ||
1575 | static void ww_test_edeadlk_acquire_more(void) | |
1576 | { | |
1577 | int ret; | |
1578 | ||
1579 | mutex_lock(&o2.base); | |
5facae4f | 1580 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1581 | o2.ctx = &t2; |
1582 | ||
1583 | WWAI(&t); | |
1584 | t2 = t; | |
1585 | t2.stamp--; | |
1586 | ||
1587 | ret = WWL(&o, &t); | |
1588 | WARN_ON(ret); | |
1589 | ||
1590 | ret = WWL(&o2, &t); | |
1591 | WARN_ON(ret != -EDEADLK); | |
1592 | ||
1593 | ret = WWL(&o3, &t); | |
1594 | } | |
1595 | ||
1596 | static void ww_test_edeadlk_acquire_more_slow(void) | |
1597 | { | |
1598 | int ret; | |
1599 | ||
1600 | mutex_lock(&o2.base); | |
5facae4f | 1601 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1602 | o2.ctx = &t2; |
1603 | ||
1604 | WWAI(&t); | |
1605 | t2 = t; | |
1606 | t2.stamp--; | |
1607 | ||
1608 | ret = WWL(&o, &t); | |
1609 | WARN_ON(ret); | |
1610 | ||
1611 | ret = WWL(&o2, &t); | |
1612 | WARN_ON(ret != -EDEADLK); | |
1613 | ||
1614 | ww_mutex_lock_slow(&o3, &t); | |
1615 | } | |
1616 | ||
1617 | static void ww_test_edeadlk_acquire_more_edeadlk(void) | |
1618 | { | |
1619 | int ret; | |
1620 | ||
1621 | mutex_lock(&o2.base); | |
5facae4f | 1622 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1623 | o2.ctx = &t2; |
1624 | ||
1625 | mutex_lock(&o3.base); | |
5facae4f | 1626 | mutex_release(&o3.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1627 | o3.ctx = &t2; |
1628 | ||
1629 | WWAI(&t); | |
1630 | t2 = t; | |
1631 | t2.stamp--; | |
1632 | ||
1633 | ret = WWL(&o, &t); | |
1634 | WARN_ON(ret); | |
1635 | ||
1636 | ret = WWL(&o2, &t); | |
1637 | WARN_ON(ret != -EDEADLK); | |
1638 | ||
1639 | ret = WWL(&o3, &t); | |
1640 | WARN_ON(ret != -EDEADLK); | |
1641 | } | |
1642 | ||
1643 | static void ww_test_edeadlk_acquire_more_edeadlk_slow(void) | |
1644 | { | |
1645 | int ret; | |
1646 | ||
1647 | mutex_lock(&o2.base); | |
5facae4f | 1648 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1649 | o2.ctx = &t2; |
1650 | ||
1651 | mutex_lock(&o3.base); | |
5facae4f | 1652 | mutex_release(&o3.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1653 | o3.ctx = &t2; |
1654 | ||
1655 | WWAI(&t); | |
1656 | t2 = t; | |
1657 | t2.stamp--; | |
1658 | ||
1659 | ret = WWL(&o, &t); | |
1660 | WARN_ON(ret); | |
1661 | ||
1662 | ret = WWL(&o2, &t); | |
1663 | WARN_ON(ret != -EDEADLK); | |
1664 | ||
1665 | ww_mutex_lock_slow(&o3, &t); | |
1666 | } | |
1667 | ||
1668 | static void ww_test_edeadlk_acquire_wrong(void) | |
1669 | { | |
1670 | int ret; | |
1671 | ||
1672 | mutex_lock(&o2.base); | |
5facae4f | 1673 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1674 | o2.ctx = &t2; |
1675 | ||
1676 | WWAI(&t); | |
1677 | t2 = t; | |
1678 | t2.stamp--; | |
1679 | ||
1680 | ret = WWL(&o, &t); | |
1681 | WARN_ON(ret); | |
1682 | ||
1683 | ret = WWL(&o2, &t); | |
1684 | WARN_ON(ret != -EDEADLK); | |
1685 | if (!ret) | |
1686 | WWU(&o2); | |
1687 | ||
1688 | WWU(&o); | |
1689 | ||
1690 | ret = WWL(&o3, &t); | |
1691 | } | |
1692 | ||
1693 | static void ww_test_edeadlk_acquire_wrong_slow(void) | |
1694 | { | |
1695 | int ret; | |
1696 | ||
1697 | mutex_lock(&o2.base); | |
5facae4f | 1698 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1699 | o2.ctx = &t2; |
1700 | ||
1701 | WWAI(&t); | |
1702 | t2 = t; | |
1703 | t2.stamp--; | |
1704 | ||
1705 | ret = WWL(&o, &t); | |
1706 | WARN_ON(ret); | |
1707 | ||
1708 | ret = WWL(&o2, &t); | |
1709 | WARN_ON(ret != -EDEADLK); | |
1710 | if (!ret) | |
1711 | WWU(&o2); | |
1712 | ||
1713 | WWU(&o); | |
1714 | ||
1715 | ww_mutex_lock_slow(&o3, &t); | |
1716 | } | |
1717 | ||
1de99445 ML |
1718 | static void ww_test_spin_nest_unlocked(void) |
1719 | { | |
1720 | raw_spin_lock_nest_lock(&lock_A, &o.base); | |
1721 | U(A); | |
1722 | } | |
1723 | ||
1724 | static void ww_test_unneeded_slow(void) | |
1725 | { | |
1726 | WWAI(&t); | |
1727 | ||
1728 | ww_mutex_lock_slow(&o, &t); | |
1729 | } | |
1730 | ||
1731 | static void ww_test_context_block(void) | |
1732 | { | |
1733 | int ret; | |
1734 | ||
1735 | WWAI(&t); | |
1736 | ||
1737 | ret = WWL(&o, &t); | |
1738 | WARN_ON(ret); | |
1739 | WWL1(&o2); | |
1740 | } | |
1741 | ||
1742 | static void ww_test_context_try(void) | |
1743 | { | |
1744 | int ret; | |
1745 | ||
1746 | WWAI(&t); | |
1747 | ||
1748 | ret = WWL(&o, &t); | |
1749 | WARN_ON(ret); | |
1750 | ||
1751 | ret = WWT(&o2); | |
1752 | WARN_ON(!ret); | |
1753 | WWU(&o2); | |
1754 | WWU(&o); | |
1755 | } | |
1756 | ||
1757 | static void ww_test_context_context(void) | |
1758 | { | |
1759 | int ret; | |
1760 | ||
1761 | WWAI(&t); | |
1762 | ||
1763 | ret = WWL(&o, &t); | |
1764 | WARN_ON(ret); | |
1765 | ||
1766 | ret = WWL(&o2, &t); | |
1767 | WARN_ON(ret); | |
1768 | ||
1769 | WWU(&o2); | |
1770 | WWU(&o); | |
1771 | } | |
1772 | ||
1773 | static void ww_test_try_block(void) | |
1774 | { | |
1775 | bool ret; | |
1776 | ||
1777 | ret = WWT(&o); | |
1778 | WARN_ON(!ret); | |
1779 | ||
1780 | WWL1(&o2); | |
1781 | WWU(&o2); | |
1782 | WWU(&o); | |
1783 | } | |
1784 | ||
1785 | static void ww_test_try_try(void) | |
1786 | { | |
1787 | bool ret; | |
1788 | ||
1789 | ret = WWT(&o); | |
1790 | WARN_ON(!ret); | |
1791 | ret = WWT(&o2); | |
1792 | WARN_ON(!ret); | |
1793 | WWU(&o2); | |
1794 | WWU(&o); | |
1795 | } | |
1796 | ||
1797 | static void ww_test_try_context(void) | |
1798 | { | |
1799 | int ret; | |
1800 | ||
1801 | ret = WWT(&o); | |
1802 | WARN_ON(!ret); | |
1803 | ||
1804 | WWAI(&t); | |
1805 | ||
1806 | ret = WWL(&o2, &t); | |
1807 | WARN_ON(ret); | |
1808 | } | |
1809 | ||
1810 | static void ww_test_block_block(void) | |
1811 | { | |
1812 | WWL1(&o); | |
1813 | WWL1(&o2); | |
1814 | } | |
1815 | ||
1816 | static void ww_test_block_try(void) | |
1817 | { | |
1818 | bool ret; | |
1819 | ||
1820 | WWL1(&o); | |
1821 | ret = WWT(&o2); | |
1822 | WARN_ON(!ret); | |
1823 | } | |
1824 | ||
1825 | static void ww_test_block_context(void) | |
1826 | { | |
1827 | int ret; | |
1828 | ||
1829 | WWL1(&o); | |
1830 | WWAI(&t); | |
1831 | ||
1832 | ret = WWL(&o2, &t); | |
1833 | WARN_ON(ret); | |
1834 | } | |
1835 | ||
1836 | static void ww_test_spin_block(void) | |
1837 | { | |
1838 | L(A); | |
1839 | U(A); | |
1840 | ||
1841 | WWL1(&o); | |
1842 | L(A); | |
1843 | U(A); | |
1844 | WWU(&o); | |
1845 | ||
1846 | L(A); | |
1847 | WWL1(&o); | |
1848 | WWU(&o); | |
1849 | U(A); | |
1850 | } | |
1851 | ||
1852 | static void ww_test_spin_try(void) | |
1853 | { | |
1854 | bool ret; | |
1855 | ||
1856 | L(A); | |
1857 | U(A); | |
1858 | ||
1859 | ret = WWT(&o); | |
1860 | WARN_ON(!ret); | |
1861 | L(A); | |
1862 | U(A); | |
1863 | WWU(&o); | |
1864 | ||
1865 | L(A); | |
1866 | ret = WWT(&o); | |
1867 | WARN_ON(!ret); | |
1868 | WWU(&o); | |
1869 | U(A); | |
1870 | } | |
1871 | ||
1872 | static void ww_test_spin_context(void) | |
1873 | { | |
1874 | int ret; | |
1875 | ||
1876 | L(A); | |
1877 | U(A); | |
1878 | ||
1879 | WWAI(&t); | |
1880 | ||
1881 | ret = WWL(&o, &t); | |
1882 | WARN_ON(ret); | |
1883 | L(A); | |
1884 | U(A); | |
1885 | WWU(&o); | |
1886 | ||
1887 | L(A); | |
1888 | ret = WWL(&o, &t); | |
1889 | WARN_ON(ret); | |
1890 | WWU(&o); | |
1891 | U(A); | |
1892 | } | |
1893 | ||
1894 | static void ww_tests(void) | |
1895 | { | |
1896 | printk(" --------------------------------------------------------------------------\n"); | |
1897 | printk(" | Wound/wait tests |\n"); | |
1898 | printk(" ---------------------\n"); | |
1899 | ||
1900 | print_testname("ww api failures"); | |
1901 | dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW); | |
2fe3d4b1 | 1902 | dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
1de99445 | 1903 | dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
25139409 | 1904 | pr_cont("\n"); |
1de99445 ML |
1905 | |
1906 | print_testname("ww contexts mixing"); | |
1907 | dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW); | |
1908 | dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW); | |
25139409 | 1909 | pr_cont("\n"); |
1de99445 ML |
1910 | |
1911 | print_testname("finishing ww context"); | |
1912 | dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW); | |
1913 | dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW); | |
1914 | dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW); | |
1915 | dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW); | |
25139409 | 1916 | pr_cont("\n"); |
1de99445 ML |
1917 | |
1918 | print_testname("locking mismatches"); | |
1919 | dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW); | |
1920 | dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW); | |
1921 | dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1922 | pr_cont("\n"); |
1de99445 | 1923 | |
f3cf139e ML |
1924 | print_testname("EDEADLK handling"); |
1925 | dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW); | |
1926 | dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW); | |
1927 | dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW); | |
1928 | dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW); | |
1929 | dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW); | |
1930 | dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW); | |
1931 | dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW); | |
1932 | dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW); | |
1933 | dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW); | |
1934 | dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW); | |
25139409 | 1935 | pr_cont("\n"); |
f3cf139e | 1936 | |
1de99445 ML |
1937 | print_testname("spinlock nest unlocked"); |
1938 | dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW); | |
25139409 | 1939 | pr_cont("\n"); |
1de99445 ML |
1940 | |
1941 | printk(" -----------------------------------------------------\n"); | |
1942 | printk(" |block | try |context|\n"); | |
1943 | printk(" -----------------------------------------------------\n"); | |
1944 | ||
1945 | print_testname("context"); | |
1946 | dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW); | |
1947 | dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW); | |
1948 | dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW); | |
25139409 | 1949 | pr_cont("\n"); |
1de99445 ML |
1950 | |
1951 | print_testname("try"); | |
1952 | dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW); | |
1953 | dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW); | |
1954 | dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1955 | pr_cont("\n"); |
1de99445 ML |
1956 | |
1957 | print_testname("block"); | |
1958 | dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW); | |
1959 | dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW); | |
1960 | dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1961 | pr_cont("\n"); |
1de99445 ML |
1962 | |
1963 | print_testname("spinlock"); | |
1964 | dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW); | |
1965 | dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW); | |
1966 | dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1967 | pr_cont("\n"); |
1de99445 | 1968 | } |
cae2ed9a IM |
1969 | |
1970 | void locking_selftest(void) | |
1971 | { | |
1972 | /* | |
1973 | * Got a locking failure before the selftest ran? | |
1974 | */ | |
1975 | if (!debug_locks) { | |
1976 | printk("----------------------------------\n"); | |
1977 | printk("| Locking API testsuite disabled |\n"); | |
1978 | printk("----------------------------------\n"); | |
1979 | return; | |
1980 | } | |
1981 | ||
e9181886 BF |
1982 | /* |
1983 | * treats read_lock() as recursive read locks for testing purpose | |
1984 | */ | |
1985 | force_read_lock_recursive = 1; | |
1986 | ||
cae2ed9a IM |
1987 | /* |
1988 | * Run the testsuite: | |
1989 | */ | |
1990 | printk("------------------------\n"); | |
1991 | printk("| Locking API testsuite:\n"); | |
1992 | printk("----------------------------------------------------------------------------\n"); | |
1993 | printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n"); | |
1994 | printk(" --------------------------------------------------------------------------\n"); | |
1995 | ||
1996 | init_shared_classes(); | |
1997 | debug_locks_silent = !debug_locks_verbose; | |
cdc84d79 | 1998 | lockdep_set_selftest_task(current); |
cae2ed9a | 1999 | |
6c9076ec | 2000 | DO_TESTCASE_6R("A-A deadlock", AA); |
cae2ed9a IM |
2001 | DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); |
2002 | DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA); | |
2003 | DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC); | |
2004 | DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA); | |
2005 | DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA); | |
2006 | DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA); | |
2007 | DO_TESTCASE_6("double unlock", double_unlock); | |
2008 | DO_TESTCASE_6("initialize held", init_held); | |
cae2ed9a IM |
2009 | |
2010 | printk(" --------------------------------------------------------------------------\n"); | |
2011 | print_testname("recursive read-lock"); | |
25139409 | 2012 | pr_cont(" |"); |
cae2ed9a | 2013 | dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 2014 | pr_cont(" |"); |
cae2ed9a | 2015 | dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2016 | pr_cont("\n"); |
cae2ed9a IM |
2017 | |
2018 | print_testname("recursive read-lock #2"); | |
25139409 | 2019 | pr_cont(" |"); |
6c9076ec | 2020 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 2021 | pr_cont(" |"); |
cae2ed9a | 2022 | dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2023 | pr_cont("\n"); |
cae2ed9a IM |
2024 | |
2025 | print_testname("mixed read-write-lock"); | |
25139409 | 2026 | pr_cont(" |"); |
cae2ed9a | 2027 | dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 2028 | pr_cont(" |"); |
cae2ed9a | 2029 | dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2030 | pr_cont("\n"); |
cae2ed9a IM |
2031 | |
2032 | print_testname("mixed write-read-lock"); | |
25139409 | 2033 | pr_cont(" |"); |
cae2ed9a | 2034 | dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 2035 | pr_cont(" |"); |
cae2ed9a | 2036 | dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2037 | pr_cont("\n"); |
cae2ed9a | 2038 | |
e9149858 PZ |
2039 | print_testname("mixed read-lock/lock-write ABBA"); |
2040 | pr_cont(" |"); | |
2041 | dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK); | |
c7e2f69d | 2042 | #ifdef CONFIG_PROVE_LOCKING |
d82fed75 PZ |
2043 | /* |
2044 | * Lockdep does indeed fail here, but there's nothing we can do about | |
2045 | * that now. Don't kill lockdep for it. | |
2046 | */ | |
2047 | unexpected_testcase_failures--; | |
c7e2f69d | 2048 | #endif |
d82fed75 | 2049 | |
e9149858 PZ |
2050 | pr_cont(" |"); |
2051 | dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM); | |
2052 | ||
2053 | print_testname("mixed read-lock/lock-read ABBA"); | |
2054 | pr_cont(" |"); | |
2055 | dotest(rlock_ABBA2, SUCCESS, LOCKTYPE_RWLOCK); | |
2056 | pr_cont(" |"); | |
2057 | dotest(rwsem_ABBA2, FAILURE, LOCKTYPE_RWSEM); | |
2058 | ||
2059 | print_testname("mixed write-lock/lock-write ABBA"); | |
2060 | pr_cont(" |"); | |
2061 | dotest(rlock_ABBA3, FAILURE, LOCKTYPE_RWLOCK); | |
2062 | pr_cont(" |"); | |
2063 | dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM); | |
2064 | ||
cae2ed9a IM |
2065 | printk(" --------------------------------------------------------------------------\n"); |
2066 | ||
2067 | /* | |
2068 | * irq-context testcases: | |
2069 | */ | |
2070 | DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1); | |
2071 | DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A); | |
2072 | DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B); | |
2073 | DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3); | |
2074 | DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4); | |
2075 | DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion); | |
2076 | ||
2077 | DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion); | |
2078 | // DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2); | |
2079 | ||
1de99445 ML |
2080 | ww_tests(); |
2081 | ||
e9181886 BF |
2082 | force_read_lock_recursive = 0; |
2083 | /* | |
2084 | * queued_read_lock() specific test cases can be put here | |
2085 | */ | |
2086 | ||
cae2ed9a IM |
2087 | if (unexpected_testcase_failures) { |
2088 | printk("-----------------------------------------------------------------\n"); | |
2089 | debug_locks = 0; | |
2090 | printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", | |
2091 | unexpected_testcase_failures, testcase_total); | |
2092 | printk("-----------------------------------------------------------------\n"); | |
2093 | } else if (expected_testcase_failures && testcase_successes) { | |
2094 | printk("--------------------------------------------------------\n"); | |
2095 | printk("%3d out of %3d testcases failed, as expected. |\n", | |
2096 | expected_testcase_failures, testcase_total); | |
2097 | printk("----------------------------------------------------\n"); | |
2098 | debug_locks = 1; | |
2099 | } else if (expected_testcase_failures && !testcase_successes) { | |
2100 | printk("--------------------------------------------------------\n"); | |
2101 | printk("All %3d testcases failed, as expected. |\n", | |
2102 | expected_testcase_failures); | |
2103 | printk("----------------------------------------\n"); | |
2104 | debug_locks = 1; | |
2105 | } else { | |
2106 | printk("-------------------------------------------------------\n"); | |
2107 | printk("Good, all %3d testcases passed! |\n", | |
2108 | testcase_successes); | |
2109 | printk("---------------------------------\n"); | |
2110 | debug_locks = 1; | |
2111 | } | |
cdc84d79 | 2112 | lockdep_set_selftest_task(NULL); |
cae2ed9a IM |
2113 | debug_locks_silent = 0; |
2114 | } |