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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 | 17 | #include <linux/sched.h> |
d5037d1d | 18 | #include <linux/sched/mm.h> |
cae2ed9a | 19 | #include <linux/delay.h> |
fbb9ce95 | 20 | #include <linux/lockdep.h> |
cae2ed9a IM |
21 | #include <linux/spinlock.h> |
22 | #include <linux/kallsyms.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/debug_locks.h> | |
25 | #include <linux/irqflags.h> | |
018956d6 | 26 | #include <linux/rtmutex.h> |
7e923e6a | 27 | #include <linux/local_lock.h> |
cae2ed9a IM |
28 | |
29 | /* | |
30 | * Change this to 1 if you want to see the failure printouts: | |
31 | */ | |
32 | static unsigned int debug_locks_verbose; | |
e9181886 | 33 | unsigned int force_read_lock_recursive; |
cae2ed9a | 34 | |
08295b3b | 35 | static DEFINE_WD_CLASS(ww_lockdep); |
1de99445 | 36 | |
cae2ed9a IM |
37 | static int __init setup_debug_locks_verbose(char *str) |
38 | { | |
39 | get_option(&str, &debug_locks_verbose); | |
40 | ||
41 | return 1; | |
42 | } | |
43 | ||
44 | __setup("debug_locks_verbose=", setup_debug_locks_verbose); | |
45 | ||
46 | #define FAILURE 0 | |
47 | #define SUCCESS 1 | |
48 | ||
49 | #define LOCKTYPE_SPIN 0x1 | |
50 | #define LOCKTYPE_RWLOCK 0x2 | |
51 | #define LOCKTYPE_MUTEX 0x4 | |
52 | #define LOCKTYPE_RWSEM 0x8 | |
1de99445 | 53 | #define LOCKTYPE_WW 0x10 |
018956d6 | 54 | #define LOCKTYPE_RTMUTEX 0x20 |
7e923e6a | 55 | #define LOCKTYPE_LL 0x40 |
1de99445 ML |
56 | |
57 | static struct ww_acquire_ctx t, t2; | |
f3cf139e | 58 | static struct ww_mutex o, o2, o3; |
cae2ed9a IM |
59 | |
60 | /* | |
61 | * Normal standalone locks, for the circular and irq-context | |
62 | * dependency tests: | |
63 | */ | |
a2e9ae58 PZ |
64 | static DEFINE_SPINLOCK(lock_A); |
65 | static DEFINE_SPINLOCK(lock_B); | |
66 | static DEFINE_SPINLOCK(lock_C); | |
67 | static DEFINE_SPINLOCK(lock_D); | |
cae2ed9a | 68 | |
9271a40d BF |
69 | static DEFINE_RAW_SPINLOCK(raw_lock_A); |
70 | static DEFINE_RAW_SPINLOCK(raw_lock_B); | |
71 | ||
cae2ed9a IM |
72 | static DEFINE_RWLOCK(rwlock_A); |
73 | static DEFINE_RWLOCK(rwlock_B); | |
74 | static DEFINE_RWLOCK(rwlock_C); | |
75 | static DEFINE_RWLOCK(rwlock_D); | |
76 | ||
77 | static DEFINE_MUTEX(mutex_A); | |
78 | static DEFINE_MUTEX(mutex_B); | |
79 | static DEFINE_MUTEX(mutex_C); | |
80 | static DEFINE_MUTEX(mutex_D); | |
81 | ||
82 | static DECLARE_RWSEM(rwsem_A); | |
83 | static DECLARE_RWSEM(rwsem_B); | |
84 | static DECLARE_RWSEM(rwsem_C); | |
85 | static DECLARE_RWSEM(rwsem_D); | |
86 | ||
018956d6 PZ |
87 | #ifdef CONFIG_RT_MUTEXES |
88 | ||
89 | static DEFINE_RT_MUTEX(rtmutex_A); | |
90 | static DEFINE_RT_MUTEX(rtmutex_B); | |
91 | static DEFINE_RT_MUTEX(rtmutex_C); | |
92 | static DEFINE_RT_MUTEX(rtmutex_D); | |
93 | ||
94 | #endif | |
95 | ||
cae2ed9a IM |
96 | /* |
97 | * Locks that we initialize dynamically as well so that | |
98 | * e.g. X1 and X2 becomes two instances of the same class, | |
99 | * but X* and Y* are different classes. We do this so that | |
100 | * we do not trigger a real lockup: | |
101 | */ | |
a2e9ae58 PZ |
102 | static DEFINE_SPINLOCK(lock_X1); |
103 | static DEFINE_SPINLOCK(lock_X2); | |
104 | static DEFINE_SPINLOCK(lock_Y1); | |
105 | static DEFINE_SPINLOCK(lock_Y2); | |
106 | static DEFINE_SPINLOCK(lock_Z1); | |
107 | static DEFINE_SPINLOCK(lock_Z2); | |
cae2ed9a IM |
108 | |
109 | static DEFINE_RWLOCK(rwlock_X1); | |
110 | static DEFINE_RWLOCK(rwlock_X2); | |
111 | static DEFINE_RWLOCK(rwlock_Y1); | |
112 | static DEFINE_RWLOCK(rwlock_Y2); | |
113 | static DEFINE_RWLOCK(rwlock_Z1); | |
114 | static DEFINE_RWLOCK(rwlock_Z2); | |
115 | ||
116 | static DEFINE_MUTEX(mutex_X1); | |
117 | static DEFINE_MUTEX(mutex_X2); | |
118 | static DEFINE_MUTEX(mutex_Y1); | |
119 | static DEFINE_MUTEX(mutex_Y2); | |
120 | static DEFINE_MUTEX(mutex_Z1); | |
121 | static DEFINE_MUTEX(mutex_Z2); | |
122 | ||
123 | static DECLARE_RWSEM(rwsem_X1); | |
124 | static DECLARE_RWSEM(rwsem_X2); | |
125 | static DECLARE_RWSEM(rwsem_Y1); | |
126 | static DECLARE_RWSEM(rwsem_Y2); | |
127 | static DECLARE_RWSEM(rwsem_Z1); | |
128 | static DECLARE_RWSEM(rwsem_Z2); | |
129 | ||
018956d6 PZ |
130 | #ifdef CONFIG_RT_MUTEXES |
131 | ||
132 | static DEFINE_RT_MUTEX(rtmutex_X1); | |
133 | static DEFINE_RT_MUTEX(rtmutex_X2); | |
134 | static DEFINE_RT_MUTEX(rtmutex_Y1); | |
135 | static DEFINE_RT_MUTEX(rtmutex_Y2); | |
136 | static DEFINE_RT_MUTEX(rtmutex_Z1); | |
137 | static DEFINE_RT_MUTEX(rtmutex_Z2); | |
138 | ||
139 | #endif | |
140 | ||
7e923e6a PZ |
141 | static local_lock_t local_A = INIT_LOCAL_LOCK(local_A); |
142 | ||
cae2ed9a IM |
143 | /* |
144 | * non-inlined runtime initializers, to let separate locks share | |
145 | * the same lock-class: | |
146 | */ | |
147 | #define INIT_CLASS_FUNC(class) \ | |
148 | static noinline void \ | |
a2e9ae58 | 149 | init_class_##class(spinlock_t *lock, rwlock_t *rwlock, \ |
9fb1b90c | 150 | struct mutex *mutex, struct rw_semaphore *rwsem)\ |
cae2ed9a | 151 | { \ |
a2e9ae58 | 152 | spin_lock_init(lock); \ |
cae2ed9a IM |
153 | rwlock_init(rwlock); \ |
154 | mutex_init(mutex); \ | |
155 | init_rwsem(rwsem); \ | |
156 | } | |
157 | ||
158 | INIT_CLASS_FUNC(X) | |
159 | INIT_CLASS_FUNC(Y) | |
160 | INIT_CLASS_FUNC(Z) | |
161 | ||
162 | static void init_shared_classes(void) | |
163 | { | |
018956d6 PZ |
164 | #ifdef CONFIG_RT_MUTEXES |
165 | static struct lock_class_key rt_X, rt_Y, rt_Z; | |
166 | ||
167 | __rt_mutex_init(&rtmutex_X1, __func__, &rt_X); | |
168 | __rt_mutex_init(&rtmutex_X2, __func__, &rt_X); | |
169 | __rt_mutex_init(&rtmutex_Y1, __func__, &rt_Y); | |
170 | __rt_mutex_init(&rtmutex_Y2, __func__, &rt_Y); | |
171 | __rt_mutex_init(&rtmutex_Z1, __func__, &rt_Z); | |
172 | __rt_mutex_init(&rtmutex_Z2, __func__, &rt_Z); | |
173 | #endif | |
174 | ||
cae2ed9a IM |
175 | init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1); |
176 | init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2); | |
177 | ||
178 | init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1); | |
179 | init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2); | |
180 | ||
181 | init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1); | |
182 | init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2); | |
183 | } | |
184 | ||
185 | /* | |
186 | * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests. | |
187 | * The following functions use a lock from a simulated hardirq/softirq | |
188 | * context, causing the locks to be marked as hardirq-safe/softirq-safe: | |
189 | */ | |
190 | ||
191 | #define HARDIRQ_DISABLE local_irq_disable | |
192 | #define HARDIRQ_ENABLE local_irq_enable | |
193 | ||
194 | #define HARDIRQ_ENTER() \ | |
195 | local_irq_disable(); \ | |
ba9f207c | 196 | __irq_enter(); \ |
cae2ed9a IM |
197 | WARN_ON(!in_irq()); |
198 | ||
199 | #define HARDIRQ_EXIT() \ | |
200 | __irq_exit(); \ | |
201 | local_irq_enable(); | |
202 | ||
203 | #define SOFTIRQ_DISABLE local_bh_disable | |
204 | #define SOFTIRQ_ENABLE local_bh_enable | |
205 | ||
206 | #define SOFTIRQ_ENTER() \ | |
207 | local_bh_disable(); \ | |
208 | local_irq_disable(); \ | |
d820ac4c | 209 | lockdep_softirq_enter(); \ |
cae2ed9a IM |
210 | WARN_ON(!in_softirq()); |
211 | ||
212 | #define SOFTIRQ_EXIT() \ | |
d820ac4c | 213 | lockdep_softirq_exit(); \ |
cae2ed9a IM |
214 | local_irq_enable(); \ |
215 | local_bh_enable(); | |
216 | ||
217 | /* | |
218 | * Shortcuts for lock/unlock API variants, to keep | |
219 | * the testcases compact: | |
220 | */ | |
a2e9ae58 PZ |
221 | #define L(x) spin_lock(&lock_##x) |
222 | #define U(x) spin_unlock(&lock_##x) | |
cae2ed9a | 223 | #define LU(x) L(x); U(x) |
a2e9ae58 | 224 | #define SI(x) spin_lock_init(&lock_##x) |
cae2ed9a IM |
225 | |
226 | #define WL(x) write_lock(&rwlock_##x) | |
227 | #define WU(x) write_unlock(&rwlock_##x) | |
228 | #define WLU(x) WL(x); WU(x) | |
229 | ||
230 | #define RL(x) read_lock(&rwlock_##x) | |
231 | #define RU(x) read_unlock(&rwlock_##x) | |
232 | #define RLU(x) RL(x); RU(x) | |
233 | #define RWI(x) rwlock_init(&rwlock_##x) | |
234 | ||
235 | #define ML(x) mutex_lock(&mutex_##x) | |
236 | #define MU(x) mutex_unlock(&mutex_##x) | |
237 | #define MI(x) mutex_init(&mutex_##x) | |
238 | ||
018956d6 PZ |
239 | #define RTL(x) rt_mutex_lock(&rtmutex_##x) |
240 | #define RTU(x) rt_mutex_unlock(&rtmutex_##x) | |
241 | #define RTI(x) rt_mutex_init(&rtmutex_##x) | |
242 | ||
cae2ed9a IM |
243 | #define WSL(x) down_write(&rwsem_##x) |
244 | #define WSU(x) up_write(&rwsem_##x) | |
245 | ||
246 | #define RSL(x) down_read(&rwsem_##x) | |
247 | #define RSU(x) up_read(&rwsem_##x) | |
248 | #define RWSI(x) init_rwsem(&rwsem_##x) | |
249 | ||
1de99445 ML |
250 | #ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH |
251 | #define WWAI(x) ww_acquire_init(x, &ww_lockdep) | |
252 | #else | |
253 | #define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0) | |
254 | #endif | |
255 | #define WWAD(x) ww_acquire_done(x) | |
256 | #define WWAF(x) ww_acquire_fini(x) | |
257 | ||
258 | #define WWL(x, c) ww_mutex_lock(x, c) | |
259 | #define WWT(x) ww_mutex_trylock(x) | |
260 | #define WWL1(x) ww_mutex_lock(x, NULL) | |
261 | #define WWU(x) ww_mutex_unlock(x) | |
262 | ||
263 | ||
cae2ed9a IM |
264 | #define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x) |
265 | ||
266 | /* | |
267 | * Generate different permutations of the same testcase, using | |
268 | * the same basic lock-dependency/state events: | |
269 | */ | |
270 | ||
271 | #define GENERATE_TESTCASE(name) \ | |
272 | \ | |
273 | static void name(void) { E(); } | |
274 | ||
275 | #define GENERATE_PERMUTATIONS_2_EVENTS(name) \ | |
276 | \ | |
277 | static void name##_12(void) { E1(); E2(); } \ | |
278 | static void name##_21(void) { E2(); E1(); } | |
279 | ||
280 | #define GENERATE_PERMUTATIONS_3_EVENTS(name) \ | |
281 | \ | |
282 | static void name##_123(void) { E1(); E2(); E3(); } \ | |
283 | static void name##_132(void) { E1(); E3(); E2(); } \ | |
284 | static void name##_213(void) { E2(); E1(); E3(); } \ | |
285 | static void name##_231(void) { E2(); E3(); E1(); } \ | |
286 | static void name##_312(void) { E3(); E1(); E2(); } \ | |
287 | static void name##_321(void) { E3(); E2(); E1(); } | |
288 | ||
289 | /* | |
290 | * AA deadlock: | |
291 | */ | |
292 | ||
293 | #define E() \ | |
294 | \ | |
295 | LOCK(X1); \ | |
296 | LOCK(X2); /* this one should fail */ | |
297 | ||
298 | /* | |
299 | * 6 testcases: | |
300 | */ | |
301 | #include "locking-selftest-spin.h" | |
302 | GENERATE_TESTCASE(AA_spin) | |
303 | #include "locking-selftest-wlock.h" | |
304 | GENERATE_TESTCASE(AA_wlock) | |
305 | #include "locking-selftest-rlock.h" | |
306 | GENERATE_TESTCASE(AA_rlock) | |
307 | #include "locking-selftest-mutex.h" | |
308 | GENERATE_TESTCASE(AA_mutex) | |
309 | #include "locking-selftest-wsem.h" | |
310 | GENERATE_TESTCASE(AA_wsem) | |
311 | #include "locking-selftest-rsem.h" | |
312 | GENERATE_TESTCASE(AA_rsem) | |
313 | ||
018956d6 PZ |
314 | #ifdef CONFIG_RT_MUTEXES |
315 | #include "locking-selftest-rtmutex.h" | |
316 | GENERATE_TESTCASE(AA_rtmutex); | |
317 | #endif | |
318 | ||
cae2ed9a IM |
319 | #undef E |
320 | ||
321 | /* | |
322 | * Special-case for read-locking, they are | |
6c9076ec | 323 | * allowed to recurse on the same lock class: |
cae2ed9a IM |
324 | */ |
325 | static void rlock_AA1(void) | |
326 | { | |
327 | RL(X1); | |
328 | RL(X1); // this one should NOT fail | |
329 | } | |
330 | ||
331 | static void rlock_AA1B(void) | |
332 | { | |
333 | RL(X1); | |
6c9076ec | 334 | RL(X2); // this one should NOT fail |
cae2ed9a IM |
335 | } |
336 | ||
337 | static void rsem_AA1(void) | |
338 | { | |
339 | RSL(X1); | |
340 | RSL(X1); // this one should fail | |
341 | } | |
342 | ||
343 | static void rsem_AA1B(void) | |
344 | { | |
345 | RSL(X1); | |
346 | RSL(X2); // this one should fail | |
347 | } | |
348 | /* | |
349 | * The mixing of read and write locks is not allowed: | |
350 | */ | |
351 | static void rlock_AA2(void) | |
352 | { | |
353 | RL(X1); | |
354 | WL(X2); // this one should fail | |
355 | } | |
356 | ||
357 | static void rsem_AA2(void) | |
358 | { | |
359 | RSL(X1); | |
360 | WSL(X2); // this one should fail | |
361 | } | |
362 | ||
363 | static void rlock_AA3(void) | |
364 | { | |
365 | WL(X1); | |
366 | RL(X2); // this one should fail | |
367 | } | |
368 | ||
369 | static void rsem_AA3(void) | |
370 | { | |
371 | WSL(X1); | |
372 | RSL(X2); // this one should fail | |
373 | } | |
374 | ||
e9149858 PZ |
375 | /* |
376 | * read_lock(A) | |
377 | * spin_lock(B) | |
378 | * spin_lock(B) | |
379 | * write_lock(A) | |
380 | */ | |
381 | static void rlock_ABBA1(void) | |
382 | { | |
383 | RL(X1); | |
384 | L(Y1); | |
385 | U(Y1); | |
386 | RU(X1); | |
387 | ||
388 | L(Y1); | |
389 | WL(X1); | |
390 | WU(X1); | |
391 | U(Y1); // should fail | |
392 | } | |
393 | ||
394 | static void rwsem_ABBA1(void) | |
395 | { | |
396 | RSL(X1); | |
397 | ML(Y1); | |
398 | MU(Y1); | |
399 | RSU(X1); | |
400 | ||
401 | ML(Y1); | |
402 | WSL(X1); | |
403 | WSU(X1); | |
404 | MU(Y1); // should fail | |
405 | } | |
406 | ||
d4f200e5 BF |
407 | /* |
408 | * read_lock(A) | |
409 | * spin_lock(B) | |
410 | * spin_lock(B) | |
411 | * write_lock(A) | |
412 | * | |
413 | * This test case is aimed at poking whether the chain cache prevents us from | |
414 | * detecting a read-lock/lock-write deadlock: if the chain cache doesn't differ | |
415 | * read/write locks, the following case may happen | |
416 | * | |
417 | * { read_lock(A)->lock(B) dependency exists } | |
418 | * | |
419 | * P0: | |
420 | * lock(B); | |
421 | * read_lock(A); | |
422 | * | |
423 | * { Not a deadlock, B -> A is added in the chain cache } | |
424 | * | |
425 | * P1: | |
426 | * lock(B); | |
427 | * write_lock(A); | |
428 | * | |
429 | * { B->A found in chain cache, not reported as a deadlock } | |
430 | * | |
431 | */ | |
432 | static void rlock_chaincache_ABBA1(void) | |
433 | { | |
434 | RL(X1); | |
435 | L(Y1); | |
436 | U(Y1); | |
437 | RU(X1); | |
438 | ||
439 | L(Y1); | |
440 | RL(X1); | |
441 | RU(X1); | |
442 | U(Y1); | |
443 | ||
444 | L(Y1); | |
445 | WL(X1); | |
446 | WU(X1); | |
447 | U(Y1); // should fail | |
448 | } | |
449 | ||
e9149858 PZ |
450 | /* |
451 | * read_lock(A) | |
452 | * spin_lock(B) | |
453 | * spin_lock(B) | |
454 | * read_lock(A) | |
455 | */ | |
456 | static void rlock_ABBA2(void) | |
457 | { | |
458 | RL(X1); | |
459 | L(Y1); | |
460 | U(Y1); | |
461 | RU(X1); | |
462 | ||
463 | L(Y1); | |
464 | RL(X1); | |
465 | RU(X1); | |
466 | U(Y1); // should NOT fail | |
467 | } | |
468 | ||
469 | static void rwsem_ABBA2(void) | |
470 | { | |
471 | RSL(X1); | |
472 | ML(Y1); | |
473 | MU(Y1); | |
474 | RSU(X1); | |
475 | ||
476 | ML(Y1); | |
477 | RSL(X1); | |
478 | RSU(X1); | |
479 | MU(Y1); // should fail | |
480 | } | |
481 | ||
482 | ||
483 | /* | |
484 | * write_lock(A) | |
485 | * spin_lock(B) | |
486 | * spin_lock(B) | |
487 | * write_lock(A) | |
488 | */ | |
489 | static void rlock_ABBA3(void) | |
490 | { | |
491 | WL(X1); | |
492 | L(Y1); | |
493 | U(Y1); | |
494 | WU(X1); | |
495 | ||
496 | L(Y1); | |
497 | WL(X1); | |
498 | WU(X1); | |
499 | U(Y1); // should fail | |
500 | } | |
501 | ||
502 | static void rwsem_ABBA3(void) | |
503 | { | |
504 | WSL(X1); | |
505 | ML(Y1); | |
506 | MU(Y1); | |
507 | WSU(X1); | |
508 | ||
509 | ML(Y1); | |
510 | WSL(X1); | |
511 | WSU(X1); | |
512 | MU(Y1); // should fail | |
513 | } | |
514 | ||
cae2ed9a IM |
515 | /* |
516 | * ABBA deadlock: | |
517 | */ | |
518 | ||
519 | #define E() \ | |
520 | \ | |
521 | LOCK_UNLOCK_2(A, B); \ | |
522 | LOCK_UNLOCK_2(B, A); /* fail */ | |
523 | ||
524 | /* | |
525 | * 6 testcases: | |
526 | */ | |
527 | #include "locking-selftest-spin.h" | |
528 | GENERATE_TESTCASE(ABBA_spin) | |
529 | #include "locking-selftest-wlock.h" | |
530 | GENERATE_TESTCASE(ABBA_wlock) | |
531 | #include "locking-selftest-rlock.h" | |
532 | GENERATE_TESTCASE(ABBA_rlock) | |
533 | #include "locking-selftest-mutex.h" | |
534 | GENERATE_TESTCASE(ABBA_mutex) | |
535 | #include "locking-selftest-wsem.h" | |
536 | GENERATE_TESTCASE(ABBA_wsem) | |
537 | #include "locking-selftest-rsem.h" | |
538 | GENERATE_TESTCASE(ABBA_rsem) | |
539 | ||
018956d6 PZ |
540 | #ifdef CONFIG_RT_MUTEXES |
541 | #include "locking-selftest-rtmutex.h" | |
542 | GENERATE_TESTCASE(ABBA_rtmutex); | |
543 | #endif | |
544 | ||
cae2ed9a IM |
545 | #undef E |
546 | ||
547 | /* | |
548 | * AB BC CA deadlock: | |
549 | */ | |
550 | ||
551 | #define E() \ | |
552 | \ | |
553 | LOCK_UNLOCK_2(A, B); \ | |
554 | LOCK_UNLOCK_2(B, C); \ | |
555 | LOCK_UNLOCK_2(C, A); /* fail */ | |
556 | ||
557 | /* | |
558 | * 6 testcases: | |
559 | */ | |
560 | #include "locking-selftest-spin.h" | |
561 | GENERATE_TESTCASE(ABBCCA_spin) | |
562 | #include "locking-selftest-wlock.h" | |
563 | GENERATE_TESTCASE(ABBCCA_wlock) | |
564 | #include "locking-selftest-rlock.h" | |
565 | GENERATE_TESTCASE(ABBCCA_rlock) | |
566 | #include "locking-selftest-mutex.h" | |
567 | GENERATE_TESTCASE(ABBCCA_mutex) | |
568 | #include "locking-selftest-wsem.h" | |
569 | GENERATE_TESTCASE(ABBCCA_wsem) | |
570 | #include "locking-selftest-rsem.h" | |
571 | GENERATE_TESTCASE(ABBCCA_rsem) | |
572 | ||
018956d6 PZ |
573 | #ifdef CONFIG_RT_MUTEXES |
574 | #include "locking-selftest-rtmutex.h" | |
575 | GENERATE_TESTCASE(ABBCCA_rtmutex); | |
576 | #endif | |
577 | ||
cae2ed9a IM |
578 | #undef E |
579 | ||
580 | /* | |
581 | * AB CA BC deadlock: | |
582 | */ | |
583 | ||
584 | #define E() \ | |
585 | \ | |
586 | LOCK_UNLOCK_2(A, B); \ | |
587 | LOCK_UNLOCK_2(C, A); \ | |
588 | LOCK_UNLOCK_2(B, C); /* fail */ | |
589 | ||
590 | /* | |
591 | * 6 testcases: | |
592 | */ | |
593 | #include "locking-selftest-spin.h" | |
594 | GENERATE_TESTCASE(ABCABC_spin) | |
595 | #include "locking-selftest-wlock.h" | |
596 | GENERATE_TESTCASE(ABCABC_wlock) | |
597 | #include "locking-selftest-rlock.h" | |
598 | GENERATE_TESTCASE(ABCABC_rlock) | |
599 | #include "locking-selftest-mutex.h" | |
600 | GENERATE_TESTCASE(ABCABC_mutex) | |
601 | #include "locking-selftest-wsem.h" | |
602 | GENERATE_TESTCASE(ABCABC_wsem) | |
603 | #include "locking-selftest-rsem.h" | |
604 | GENERATE_TESTCASE(ABCABC_rsem) | |
605 | ||
018956d6 PZ |
606 | #ifdef CONFIG_RT_MUTEXES |
607 | #include "locking-selftest-rtmutex.h" | |
608 | GENERATE_TESTCASE(ABCABC_rtmutex); | |
609 | #endif | |
610 | ||
cae2ed9a IM |
611 | #undef E |
612 | ||
613 | /* | |
614 | * AB BC CD DA deadlock: | |
615 | */ | |
616 | ||
617 | #define E() \ | |
618 | \ | |
619 | LOCK_UNLOCK_2(A, B); \ | |
620 | LOCK_UNLOCK_2(B, C); \ | |
621 | LOCK_UNLOCK_2(C, D); \ | |
622 | LOCK_UNLOCK_2(D, A); /* fail */ | |
623 | ||
624 | /* | |
625 | * 6 testcases: | |
626 | */ | |
627 | #include "locking-selftest-spin.h" | |
628 | GENERATE_TESTCASE(ABBCCDDA_spin) | |
629 | #include "locking-selftest-wlock.h" | |
630 | GENERATE_TESTCASE(ABBCCDDA_wlock) | |
631 | #include "locking-selftest-rlock.h" | |
632 | GENERATE_TESTCASE(ABBCCDDA_rlock) | |
633 | #include "locking-selftest-mutex.h" | |
634 | GENERATE_TESTCASE(ABBCCDDA_mutex) | |
635 | #include "locking-selftest-wsem.h" | |
636 | GENERATE_TESTCASE(ABBCCDDA_wsem) | |
637 | #include "locking-selftest-rsem.h" | |
638 | GENERATE_TESTCASE(ABBCCDDA_rsem) | |
639 | ||
018956d6 PZ |
640 | #ifdef CONFIG_RT_MUTEXES |
641 | #include "locking-selftest-rtmutex.h" | |
642 | GENERATE_TESTCASE(ABBCCDDA_rtmutex); | |
643 | #endif | |
644 | ||
cae2ed9a IM |
645 | #undef E |
646 | ||
647 | /* | |
648 | * AB CD BD DA deadlock: | |
649 | */ | |
650 | #define E() \ | |
651 | \ | |
652 | LOCK_UNLOCK_2(A, B); \ | |
653 | LOCK_UNLOCK_2(C, D); \ | |
654 | LOCK_UNLOCK_2(B, D); \ | |
655 | LOCK_UNLOCK_2(D, A); /* fail */ | |
656 | ||
657 | /* | |
658 | * 6 testcases: | |
659 | */ | |
660 | #include "locking-selftest-spin.h" | |
661 | GENERATE_TESTCASE(ABCDBDDA_spin) | |
662 | #include "locking-selftest-wlock.h" | |
663 | GENERATE_TESTCASE(ABCDBDDA_wlock) | |
664 | #include "locking-selftest-rlock.h" | |
665 | GENERATE_TESTCASE(ABCDBDDA_rlock) | |
666 | #include "locking-selftest-mutex.h" | |
667 | GENERATE_TESTCASE(ABCDBDDA_mutex) | |
668 | #include "locking-selftest-wsem.h" | |
669 | GENERATE_TESTCASE(ABCDBDDA_wsem) | |
670 | #include "locking-selftest-rsem.h" | |
671 | GENERATE_TESTCASE(ABCDBDDA_rsem) | |
672 | ||
018956d6 PZ |
673 | #ifdef CONFIG_RT_MUTEXES |
674 | #include "locking-selftest-rtmutex.h" | |
675 | GENERATE_TESTCASE(ABCDBDDA_rtmutex); | |
676 | #endif | |
677 | ||
cae2ed9a IM |
678 | #undef E |
679 | ||
680 | /* | |
681 | * AB CD BC DA deadlock: | |
682 | */ | |
683 | #define E() \ | |
684 | \ | |
685 | LOCK_UNLOCK_2(A, B); \ | |
686 | LOCK_UNLOCK_2(C, D); \ | |
687 | LOCK_UNLOCK_2(B, C); \ | |
688 | LOCK_UNLOCK_2(D, A); /* fail */ | |
689 | ||
690 | /* | |
691 | * 6 testcases: | |
692 | */ | |
693 | #include "locking-selftest-spin.h" | |
694 | GENERATE_TESTCASE(ABCDBCDA_spin) | |
695 | #include "locking-selftest-wlock.h" | |
696 | GENERATE_TESTCASE(ABCDBCDA_wlock) | |
697 | #include "locking-selftest-rlock.h" | |
698 | GENERATE_TESTCASE(ABCDBCDA_rlock) | |
699 | #include "locking-selftest-mutex.h" | |
700 | GENERATE_TESTCASE(ABCDBCDA_mutex) | |
701 | #include "locking-selftest-wsem.h" | |
702 | GENERATE_TESTCASE(ABCDBCDA_wsem) | |
703 | #include "locking-selftest-rsem.h" | |
704 | GENERATE_TESTCASE(ABCDBCDA_rsem) | |
705 | ||
018956d6 PZ |
706 | #ifdef CONFIG_RT_MUTEXES |
707 | #include "locking-selftest-rtmutex.h" | |
708 | GENERATE_TESTCASE(ABCDBCDA_rtmutex); | |
709 | #endif | |
710 | ||
cae2ed9a IM |
711 | #undef E |
712 | ||
713 | /* | |
714 | * Double unlock: | |
715 | */ | |
716 | #define E() \ | |
717 | \ | |
718 | LOCK(A); \ | |
719 | UNLOCK(A); \ | |
720 | UNLOCK(A); /* fail */ | |
721 | ||
722 | /* | |
723 | * 6 testcases: | |
724 | */ | |
725 | #include "locking-selftest-spin.h" | |
726 | GENERATE_TESTCASE(double_unlock_spin) | |
727 | #include "locking-selftest-wlock.h" | |
728 | GENERATE_TESTCASE(double_unlock_wlock) | |
729 | #include "locking-selftest-rlock.h" | |
730 | GENERATE_TESTCASE(double_unlock_rlock) | |
731 | #include "locking-selftest-mutex.h" | |
732 | GENERATE_TESTCASE(double_unlock_mutex) | |
733 | #include "locking-selftest-wsem.h" | |
734 | GENERATE_TESTCASE(double_unlock_wsem) | |
735 | #include "locking-selftest-rsem.h" | |
736 | GENERATE_TESTCASE(double_unlock_rsem) | |
737 | ||
018956d6 PZ |
738 | #ifdef CONFIG_RT_MUTEXES |
739 | #include "locking-selftest-rtmutex.h" | |
740 | GENERATE_TESTCASE(double_unlock_rtmutex); | |
741 | #endif | |
742 | ||
cae2ed9a IM |
743 | #undef E |
744 | ||
cae2ed9a IM |
745 | /* |
746 | * initializing a held lock: | |
747 | */ | |
748 | #define E() \ | |
749 | \ | |
750 | LOCK(A); \ | |
751 | INIT(A); /* fail */ | |
752 | ||
753 | /* | |
754 | * 6 testcases: | |
755 | */ | |
756 | #include "locking-selftest-spin.h" | |
757 | GENERATE_TESTCASE(init_held_spin) | |
758 | #include "locking-selftest-wlock.h" | |
759 | GENERATE_TESTCASE(init_held_wlock) | |
760 | #include "locking-selftest-rlock.h" | |
761 | GENERATE_TESTCASE(init_held_rlock) | |
762 | #include "locking-selftest-mutex.h" | |
763 | GENERATE_TESTCASE(init_held_mutex) | |
764 | #include "locking-selftest-wsem.h" | |
765 | GENERATE_TESTCASE(init_held_wsem) | |
766 | #include "locking-selftest-rsem.h" | |
767 | GENERATE_TESTCASE(init_held_rsem) | |
768 | ||
018956d6 PZ |
769 | #ifdef CONFIG_RT_MUTEXES |
770 | #include "locking-selftest-rtmutex.h" | |
771 | GENERATE_TESTCASE(init_held_rtmutex); | |
772 | #endif | |
773 | ||
cae2ed9a IM |
774 | #undef E |
775 | ||
776 | /* | |
777 | * locking an irq-safe lock with irqs enabled: | |
778 | */ | |
779 | #define E1() \ | |
780 | \ | |
781 | IRQ_ENTER(); \ | |
782 | LOCK(A); \ | |
783 | UNLOCK(A); \ | |
784 | IRQ_EXIT(); | |
785 | ||
786 | #define E2() \ | |
787 | \ | |
788 | LOCK(A); \ | |
789 | UNLOCK(A); | |
790 | ||
791 | /* | |
792 | * Generate 24 testcases: | |
793 | */ | |
794 | #include "locking-selftest-spin-hardirq.h" | |
795 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) | |
796 | ||
797 | #include "locking-selftest-rlock-hardirq.h" | |
798 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) | |
799 | ||
800 | #include "locking-selftest-wlock-hardirq.h" | |
801 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock) | |
802 | ||
803 | #include "locking-selftest-spin-softirq.h" | |
804 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin) | |
805 | ||
806 | #include "locking-selftest-rlock-softirq.h" | |
807 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) | |
808 | ||
809 | #include "locking-selftest-wlock-softirq.h" | |
810 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) | |
811 | ||
812 | #undef E1 | |
813 | #undef E2 | |
814 | ||
815 | /* | |
816 | * Enabling hardirqs with a softirq-safe lock held: | |
817 | */ | |
818 | #define E1() \ | |
819 | \ | |
820 | SOFTIRQ_ENTER(); \ | |
821 | LOCK(A); \ | |
822 | UNLOCK(A); \ | |
823 | SOFTIRQ_EXIT(); | |
824 | ||
825 | #define E2() \ | |
826 | \ | |
827 | HARDIRQ_DISABLE(); \ | |
828 | LOCK(A); \ | |
829 | HARDIRQ_ENABLE(); \ | |
830 | UNLOCK(A); | |
831 | ||
832 | /* | |
833 | * Generate 12 testcases: | |
834 | */ | |
835 | #include "locking-selftest-spin.h" | |
836 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin) | |
837 | ||
838 | #include "locking-selftest-wlock.h" | |
839 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock) | |
840 | ||
841 | #include "locking-selftest-rlock.h" | |
842 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) | |
843 | ||
844 | #undef E1 | |
845 | #undef E2 | |
846 | ||
847 | /* | |
848 | * Enabling irqs with an irq-safe lock held: | |
849 | */ | |
850 | #define E1() \ | |
851 | \ | |
852 | IRQ_ENTER(); \ | |
853 | LOCK(A); \ | |
854 | UNLOCK(A); \ | |
855 | IRQ_EXIT(); | |
856 | ||
857 | #define E2() \ | |
858 | \ | |
859 | IRQ_DISABLE(); \ | |
860 | LOCK(A); \ | |
861 | IRQ_ENABLE(); \ | |
862 | UNLOCK(A); | |
863 | ||
864 | /* | |
865 | * Generate 24 testcases: | |
866 | */ | |
867 | #include "locking-selftest-spin-hardirq.h" | |
868 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) | |
869 | ||
870 | #include "locking-selftest-rlock-hardirq.h" | |
871 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) | |
872 | ||
873 | #include "locking-selftest-wlock-hardirq.h" | |
874 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock) | |
875 | ||
876 | #include "locking-selftest-spin-softirq.h" | |
877 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin) | |
878 | ||
879 | #include "locking-selftest-rlock-softirq.h" | |
880 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) | |
881 | ||
882 | #include "locking-selftest-wlock-softirq.h" | |
883 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) | |
884 | ||
885 | #undef E1 | |
886 | #undef E2 | |
887 | ||
888 | /* | |
889 | * Acquiring a irq-unsafe lock while holding an irq-safe-lock: | |
890 | */ | |
891 | #define E1() \ | |
892 | \ | |
893 | LOCK(A); \ | |
894 | LOCK(B); \ | |
895 | UNLOCK(B); \ | |
896 | UNLOCK(A); \ | |
897 | ||
898 | #define E2() \ | |
899 | \ | |
900 | LOCK(B); \ | |
901 | UNLOCK(B); | |
902 | ||
903 | #define E3() \ | |
904 | \ | |
905 | IRQ_ENTER(); \ | |
906 | LOCK(A); \ | |
907 | UNLOCK(A); \ | |
908 | IRQ_EXIT(); | |
909 | ||
910 | /* | |
911 | * Generate 36 testcases: | |
912 | */ | |
913 | #include "locking-selftest-spin-hardirq.h" | |
914 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) | |
915 | ||
916 | #include "locking-selftest-rlock-hardirq.h" | |
917 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) | |
918 | ||
919 | #include "locking-selftest-wlock-hardirq.h" | |
920 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock) | |
921 | ||
922 | #include "locking-selftest-spin-softirq.h" | |
923 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin) | |
924 | ||
925 | #include "locking-selftest-rlock-softirq.h" | |
926 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) | |
927 | ||
928 | #include "locking-selftest-wlock-softirq.h" | |
929 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) | |
930 | ||
931 | #undef E1 | |
932 | #undef E2 | |
933 | #undef E3 | |
934 | ||
935 | /* | |
936 | * If a lock turns into softirq-safe, but earlier it took | |
937 | * a softirq-unsafe lock: | |
938 | */ | |
939 | ||
940 | #define E1() \ | |
941 | IRQ_DISABLE(); \ | |
942 | LOCK(A); \ | |
943 | LOCK(B); \ | |
944 | UNLOCK(B); \ | |
945 | UNLOCK(A); \ | |
946 | IRQ_ENABLE(); | |
947 | ||
948 | #define E2() \ | |
949 | LOCK(B); \ | |
950 | UNLOCK(B); | |
951 | ||
952 | #define E3() \ | |
953 | IRQ_ENTER(); \ | |
954 | LOCK(A); \ | |
955 | UNLOCK(A); \ | |
956 | IRQ_EXIT(); | |
957 | ||
958 | /* | |
959 | * Generate 36 testcases: | |
960 | */ | |
961 | #include "locking-selftest-spin-hardirq.h" | |
962 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) | |
963 | ||
964 | #include "locking-selftest-rlock-hardirq.h" | |
965 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) | |
966 | ||
967 | #include "locking-selftest-wlock-hardirq.h" | |
968 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock) | |
969 | ||
970 | #include "locking-selftest-spin-softirq.h" | |
971 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin) | |
972 | ||
973 | #include "locking-selftest-rlock-softirq.h" | |
974 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) | |
975 | ||
976 | #include "locking-selftest-wlock-softirq.h" | |
977 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) | |
978 | ||
979 | #undef E1 | |
980 | #undef E2 | |
981 | #undef E3 | |
982 | ||
983 | /* | |
984 | * read-lock / write-lock irq inversion. | |
985 | * | |
986 | * Deadlock scenario: | |
987 | * | |
988 | * CPU#1 is at #1, i.e. it has write-locked A, but has not | |
989 | * taken B yet. | |
990 | * | |
991 | * CPU#2 is at #2, i.e. it has locked B. | |
992 | * | |
993 | * Hardirq hits CPU#2 at point #2 and is trying to read-lock A. | |
994 | * | |
995 | * The deadlock occurs because CPU#1 will spin on B, and CPU#2 | |
996 | * will spin on A. | |
997 | */ | |
998 | ||
999 | #define E1() \ | |
1000 | \ | |
1001 | IRQ_DISABLE(); \ | |
1002 | WL(A); \ | |
1003 | LOCK(B); \ | |
1004 | UNLOCK(B); \ | |
1005 | WU(A); \ | |
1006 | IRQ_ENABLE(); | |
1007 | ||
1008 | #define E2() \ | |
1009 | \ | |
1010 | LOCK(B); \ | |
1011 | UNLOCK(B); | |
1012 | ||
1013 | #define E3() \ | |
1014 | \ | |
1015 | IRQ_ENTER(); \ | |
1016 | RL(A); \ | |
1017 | RU(A); \ | |
1018 | IRQ_EXIT(); | |
1019 | ||
1020 | /* | |
1021 | * Generate 36 testcases: | |
1022 | */ | |
1023 | #include "locking-selftest-spin-hardirq.h" | |
1024 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin) | |
1025 | ||
1026 | #include "locking-selftest-rlock-hardirq.h" | |
1027 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock) | |
1028 | ||
1029 | #include "locking-selftest-wlock-hardirq.h" | |
1030 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock) | |
1031 | ||
1032 | #include "locking-selftest-spin-softirq.h" | |
1033 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin) | |
1034 | ||
1035 | #include "locking-selftest-rlock-softirq.h" | |
1036 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock) | |
1037 | ||
1038 | #include "locking-selftest-wlock-softirq.h" | |
1039 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) | |
1040 | ||
1041 | #undef E1 | |
1042 | #undef E2 | |
1043 | #undef E3 | |
1044 | ||
8ef7ca75 BF |
1045 | /* |
1046 | * write-read / write-read / write-read deadlock even if read is recursive | |
1047 | */ | |
1048 | ||
1049 | #define E1() \ | |
1050 | \ | |
1051 | WL(X1); \ | |
1052 | RL(Y1); \ | |
1053 | RU(Y1); \ | |
1054 | WU(X1); | |
1055 | ||
1056 | #define E2() \ | |
1057 | \ | |
1058 | WL(Y1); \ | |
1059 | RL(Z1); \ | |
1060 | RU(Z1); \ | |
1061 | WU(Y1); | |
1062 | ||
1063 | #define E3() \ | |
1064 | \ | |
1065 | WL(Z1); \ | |
1066 | RL(X1); \ | |
1067 | RU(X1); \ | |
1068 | WU(Z1); | |
1069 | ||
1070 | #include "locking-selftest-rlock.h" | |
1071 | GENERATE_PERMUTATIONS_3_EVENTS(W1R2_W2R3_W3R1) | |
1072 | ||
1073 | #undef E1 | |
1074 | #undef E2 | |
1075 | #undef E3 | |
1076 | ||
1077 | /* | |
1078 | * write-write / read-read / write-read deadlock even if read is recursive | |
1079 | */ | |
1080 | ||
1081 | #define E1() \ | |
1082 | \ | |
1083 | WL(X1); \ | |
1084 | WL(Y1); \ | |
1085 | WU(Y1); \ | |
1086 | WU(X1); | |
1087 | ||
1088 | #define E2() \ | |
1089 | \ | |
1090 | RL(Y1); \ | |
1091 | RL(Z1); \ | |
1092 | RU(Z1); \ | |
1093 | RU(Y1); | |
1094 | ||
1095 | #define E3() \ | |
1096 | \ | |
1097 | WL(Z1); \ | |
1098 | RL(X1); \ | |
1099 | RU(X1); \ | |
1100 | WU(Z1); | |
1101 | ||
1102 | #include "locking-selftest-rlock.h" | |
1103 | GENERATE_PERMUTATIONS_3_EVENTS(W1W2_R2R3_W3R1) | |
1104 | ||
1105 | #undef E1 | |
1106 | #undef E2 | |
1107 | #undef E3 | |
1108 | ||
1109 | /* | |
1110 | * write-write / read-read / read-write is not deadlock when read is recursive | |
1111 | */ | |
1112 | ||
1113 | #define E1() \ | |
1114 | \ | |
1115 | WL(X1); \ | |
1116 | WL(Y1); \ | |
1117 | WU(Y1); \ | |
1118 | WU(X1); | |
1119 | ||
1120 | #define E2() \ | |
1121 | \ | |
1122 | RL(Y1); \ | |
1123 | RL(Z1); \ | |
1124 | RU(Z1); \ | |
1125 | RU(Y1); | |
1126 | ||
1127 | #define E3() \ | |
1128 | \ | |
1129 | RL(Z1); \ | |
1130 | WL(X1); \ | |
1131 | WU(X1); \ | |
1132 | RU(Z1); | |
1133 | ||
1134 | #include "locking-selftest-rlock.h" | |
1135 | GENERATE_PERMUTATIONS_3_EVENTS(W1R2_R2R3_W3W1) | |
1136 | ||
1137 | #undef E1 | |
1138 | #undef E2 | |
1139 | #undef E3 | |
1140 | ||
1141 | /* | |
1142 | * write-read / read-read / write-write is not deadlock when read is recursive | |
1143 | */ | |
1144 | ||
1145 | #define E1() \ | |
1146 | \ | |
1147 | WL(X1); \ | |
1148 | RL(Y1); \ | |
1149 | RU(Y1); \ | |
1150 | WU(X1); | |
1151 | ||
1152 | #define E2() \ | |
1153 | \ | |
1154 | RL(Y1); \ | |
1155 | RL(Z1); \ | |
1156 | RU(Z1); \ | |
1157 | RU(Y1); | |
1158 | ||
1159 | #define E3() \ | |
1160 | \ | |
1161 | WL(Z1); \ | |
1162 | WL(X1); \ | |
1163 | WU(X1); \ | |
1164 | WU(Z1); | |
1165 | ||
1166 | #include "locking-selftest-rlock.h" | |
1167 | GENERATE_PERMUTATIONS_3_EVENTS(W1W2_R2R3_R3W1) | |
1168 | ||
1169 | #undef E1 | |
1170 | #undef E2 | |
1171 | #undef E3 | |
cae2ed9a IM |
1172 | /* |
1173 | * read-lock / write-lock recursion that is actually safe. | |
1174 | */ | |
1175 | ||
1176 | #define E1() \ | |
1177 | \ | |
1178 | IRQ_DISABLE(); \ | |
1179 | WL(A); \ | |
1180 | WU(A); \ | |
1181 | IRQ_ENABLE(); | |
1182 | ||
1183 | #define E2() \ | |
1184 | \ | |
1185 | RL(A); \ | |
1186 | RU(A); \ | |
1187 | ||
1188 | #define E3() \ | |
1189 | \ | |
1190 | IRQ_ENTER(); \ | |
31e0d747 | 1191 | LOCK(A); \ |
cae2ed9a IM |
1192 | L(B); \ |
1193 | U(B); \ | |
31e0d747 | 1194 | UNLOCK(A); \ |
cae2ed9a IM |
1195 | IRQ_EXIT(); |
1196 | ||
1197 | /* | |
31e0d747 | 1198 | * Generate 24 testcases: |
cae2ed9a IM |
1199 | */ |
1200 | #include "locking-selftest-hardirq.h" | |
31e0d747 BF |
1201 | #include "locking-selftest-rlock.h" |
1202 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_rlock) | |
1203 | ||
1204 | #include "locking-selftest-wlock.h" | |
1205 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_wlock) | |
cae2ed9a IM |
1206 | |
1207 | #include "locking-selftest-softirq.h" | |
31e0d747 BF |
1208 | #include "locking-selftest-rlock.h" |
1209 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_rlock) | |
1210 | ||
1211 | #include "locking-selftest-wlock.h" | |
1212 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_wlock) | |
cae2ed9a IM |
1213 | |
1214 | #undef E1 | |
1215 | #undef E2 | |
1216 | #undef E3 | |
1217 | ||
1218 | /* | |
1219 | * read-lock / write-lock recursion that is unsafe. | |
1220 | */ | |
1221 | ||
1222 | #define E1() \ | |
1223 | \ | |
1224 | IRQ_DISABLE(); \ | |
1225 | L(B); \ | |
31e0d747 BF |
1226 | LOCK(A); \ |
1227 | UNLOCK(A); \ | |
cae2ed9a IM |
1228 | U(B); \ |
1229 | IRQ_ENABLE(); | |
1230 | ||
1231 | #define E2() \ | |
1232 | \ | |
1233 | RL(A); \ | |
1234 | RU(A); \ | |
1235 | ||
1236 | #define E3() \ | |
1237 | \ | |
1238 | IRQ_ENTER(); \ | |
1239 | L(B); \ | |
1240 | U(B); \ | |
1241 | IRQ_EXIT(); | |
1242 | ||
1243 | /* | |
31e0d747 | 1244 | * Generate 24 testcases: |
cae2ed9a IM |
1245 | */ |
1246 | #include "locking-selftest-hardirq.h" | |
31e0d747 BF |
1247 | #include "locking-selftest-rlock.h" |
1248 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_rlock) | |
1249 | ||
1250 | #include "locking-selftest-wlock.h" | |
1251 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_wlock) | |
cae2ed9a IM |
1252 | |
1253 | #include "locking-selftest-softirq.h" | |
31e0d747 BF |
1254 | #include "locking-selftest-rlock.h" |
1255 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_rlock) | |
1256 | ||
1257 | #include "locking-selftest-wlock.h" | |
1258 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_wlock) | |
cae2ed9a | 1259 | |
96a16f45 BF |
1260 | #undef E1 |
1261 | #undef E2 | |
1262 | #undef E3 | |
1263 | /* | |
1264 | * read-lock / write-lock recursion that is unsafe. | |
1265 | * | |
1266 | * A is a ENABLED_*_READ lock | |
1267 | * B is a USED_IN_*_READ lock | |
1268 | * | |
1269 | * read_lock(A); | |
1270 | * write_lock(B); | |
1271 | * <interrupt> | |
1272 | * read_lock(B); | |
1273 | * write_lock(A); // if this one is read_lock(), no deadlock | |
1274 | */ | |
1275 | ||
1276 | #define E1() \ | |
1277 | \ | |
1278 | IRQ_DISABLE(); \ | |
1279 | WL(B); \ | |
1280 | LOCK(A); \ | |
1281 | UNLOCK(A); \ | |
1282 | WU(B); \ | |
1283 | IRQ_ENABLE(); | |
1284 | ||
1285 | #define E2() \ | |
1286 | \ | |
1287 | RL(A); \ | |
1288 | RU(A); \ | |
1289 | ||
1290 | #define E3() \ | |
1291 | \ | |
1292 | IRQ_ENTER(); \ | |
1293 | RL(B); \ | |
1294 | RU(B); \ | |
1295 | IRQ_EXIT(); | |
1296 | ||
1297 | /* | |
1298 | * Generate 24 testcases: | |
1299 | */ | |
1300 | #include "locking-selftest-hardirq.h" | |
1301 | #include "locking-selftest-rlock.h" | |
1302 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_hard_rlock) | |
1303 | ||
1304 | #include "locking-selftest-wlock.h" | |
1305 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_hard_wlock) | |
1306 | ||
1307 | #include "locking-selftest-softirq.h" | |
1308 | #include "locking-selftest-rlock.h" | |
1309 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_soft_rlock) | |
1310 | ||
1311 | #include "locking-selftest-wlock.h" | |
1312 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_soft_wlock) | |
1313 | ||
cae2ed9a IM |
1314 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1315 | # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) | |
9271a40d | 1316 | # define I_RAW_SPINLOCK(x) lockdep_reset_lock(&raw_lock_##x.dep_map) |
cae2ed9a IM |
1317 | # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) |
1318 | # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) | |
1319 | # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) | |
1de99445 | 1320 | # define I_WW(x) lockdep_reset_lock(&x.dep_map) |
7e923e6a | 1321 | # define I_LOCAL_LOCK(x) lockdep_reset_lock(&local_##x.dep_map) |
018956d6 PZ |
1322 | #ifdef CONFIG_RT_MUTEXES |
1323 | # define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map) | |
1324 | #endif | |
cae2ed9a IM |
1325 | #else |
1326 | # define I_SPINLOCK(x) | |
9271a40d | 1327 | # define I_RAW_SPINLOCK(x) |
cae2ed9a IM |
1328 | # define I_RWLOCK(x) |
1329 | # define I_MUTEX(x) | |
1330 | # define I_RWSEM(x) | |
1de99445 | 1331 | # define I_WW(x) |
7e923e6a | 1332 | # define I_LOCAL_LOCK(x) |
cae2ed9a IM |
1333 | #endif |
1334 | ||
018956d6 PZ |
1335 | #ifndef I_RTMUTEX |
1336 | # define I_RTMUTEX(x) | |
1337 | #endif | |
1338 | ||
1339 | #ifdef CONFIG_RT_MUTEXES | |
1340 | #define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x) | |
1341 | #else | |
1342 | #define I2_RTMUTEX(x) | |
1343 | #endif | |
1344 | ||
cae2ed9a IM |
1345 | #define I1(x) \ |
1346 | do { \ | |
1347 | I_SPINLOCK(x); \ | |
1348 | I_RWLOCK(x); \ | |
1349 | I_MUTEX(x); \ | |
1350 | I_RWSEM(x); \ | |
018956d6 | 1351 | I_RTMUTEX(x); \ |
cae2ed9a IM |
1352 | } while (0) |
1353 | ||
1354 | #define I2(x) \ | |
1355 | do { \ | |
a2e9ae58 | 1356 | spin_lock_init(&lock_##x); \ |
cae2ed9a IM |
1357 | rwlock_init(&rwlock_##x); \ |
1358 | mutex_init(&mutex_##x); \ | |
1359 | init_rwsem(&rwsem_##x); \ | |
018956d6 | 1360 | I2_RTMUTEX(x); \ |
cae2ed9a IM |
1361 | } while (0) |
1362 | ||
1363 | static void reset_locks(void) | |
1364 | { | |
1365 | local_irq_disable(); | |
1de99445 ML |
1366 | lockdep_free_key_range(&ww_lockdep.acquire_key, 1); |
1367 | lockdep_free_key_range(&ww_lockdep.mutex_key, 1); | |
1368 | ||
cae2ed9a IM |
1369 | I1(A); I1(B); I1(C); I1(D); |
1370 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); | |
f3cf139e | 1371 | I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
9271a40d | 1372 | I_RAW_SPINLOCK(A); I_RAW_SPINLOCK(B); |
7e923e6a PZ |
1373 | I_LOCAL_LOCK(A); |
1374 | ||
cae2ed9a | 1375 | lockdep_reset(); |
7e923e6a | 1376 | |
cae2ed9a IM |
1377 | I2(A); I2(B); I2(C); I2(D); |
1378 | init_shared_classes(); | |
9271a40d BF |
1379 | raw_spin_lock_init(&raw_lock_A); |
1380 | raw_spin_lock_init(&raw_lock_B); | |
7e923e6a | 1381 | local_lock_init(&local_A); |
1de99445 | 1382 | |
f3cf139e | 1383 | ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
1de99445 ML |
1384 | memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2)); |
1385 | memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key)); | |
1386 | memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key)); | |
cae2ed9a IM |
1387 | local_irq_enable(); |
1388 | } | |
1389 | ||
1390 | #undef I | |
1391 | ||
1392 | static int testcase_total; | |
1393 | static int testcase_successes; | |
1394 | static int expected_testcase_failures; | |
1395 | static int unexpected_testcase_failures; | |
1396 | ||
1397 | static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) | |
1398 | { | |
1399 | unsigned long saved_preempt_count = preempt_count(); | |
cae2ed9a IM |
1400 | |
1401 | WARN_ON(irqs_disabled()); | |
1402 | ||
5831c0f7 PZ |
1403 | debug_locks_silent = !(debug_locks_verbose & lockclass_mask); |
1404 | ||
cae2ed9a IM |
1405 | testcase_fn(); |
1406 | /* | |
1407 | * Filter out expected failures: | |
1408 | */ | |
1409 | #ifndef CONFIG_PROVE_LOCKING | |
166989e3 | 1410 | if (expected == FAILURE && debug_locks) { |
1de99445 | 1411 | expected_testcase_failures++; |
25139409 | 1412 | pr_cont("failed|"); |
166989e3 ML |
1413 | } |
1414 | else | |
1415 | #endif | |
1416 | if (debug_locks != expected) { | |
1de99445 | 1417 | unexpected_testcase_failures++; |
25139409 | 1418 | pr_cont("FAILED|"); |
cae2ed9a IM |
1419 | } else { |
1420 | testcase_successes++; | |
25139409 | 1421 | pr_cont(" ok |"); |
cae2ed9a IM |
1422 | } |
1423 | testcase_total++; | |
1424 | ||
5831c0f7 | 1425 | if (debug_locks_verbose & lockclass_mask) |
25139409 | 1426 | pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n", |
cae2ed9a IM |
1427 | lockclass_mask, debug_locks, expected); |
1428 | /* | |
1429 | * Some tests (e.g. double-unlock) might corrupt the preemption | |
1430 | * count, so restore it: | |
1431 | */ | |
4a2b4b22 | 1432 | preempt_count_set(saved_preempt_count); |
cae2ed9a IM |
1433 | #ifdef CONFIG_TRACE_IRQFLAGS |
1434 | if (softirq_count()) | |
1435 | current->softirqs_enabled = 0; | |
1436 | else | |
1437 | current->softirqs_enabled = 1; | |
1438 | #endif | |
1439 | ||
1440 | reset_locks(); | |
1441 | } | |
1442 | ||
018956d6 PZ |
1443 | #ifdef CONFIG_RT_MUTEXES |
1444 | #define dotest_rt(fn, e, m) dotest((fn), (e), (m)) | |
1445 | #else | |
1446 | #define dotest_rt(fn, e, m) | |
1447 | #endif | |
1448 | ||
cae2ed9a IM |
1449 | static inline void print_testname(const char *testname) |
1450 | { | |
1451 | printk("%33s:", testname); | |
1452 | } | |
1453 | ||
1454 | #define DO_TESTCASE_1(desc, name, nr) \ | |
1455 | print_testname(desc"/"#nr); \ | |
1456 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1457 | pr_cont("\n"); |
cae2ed9a IM |
1458 | |
1459 | #define DO_TESTCASE_1B(desc, name, nr) \ | |
1460 | print_testname(desc"/"#nr); \ | |
1461 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
25139409 | 1462 | pr_cont("\n"); |
cae2ed9a | 1463 | |
8ef7ca75 BF |
1464 | #define DO_TESTCASE_1RR(desc, name, nr) \ |
1465 | print_testname(desc"/"#nr); \ | |
1466 | pr_cont(" |"); \ | |
1467 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1468 | pr_cont("\n"); | |
1469 | ||
1470 | #define DO_TESTCASE_1RRB(desc, name, nr) \ | |
1471 | print_testname(desc"/"#nr); \ | |
1472 | pr_cont(" |"); \ | |
1473 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1474 | pr_cont("\n"); | |
1475 | ||
1476 | ||
cae2ed9a IM |
1477 | #define DO_TESTCASE_3(desc, name, nr) \ |
1478 | print_testname(desc"/"#nr); \ | |
1479 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ | |
1480 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1481 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1482 | pr_cont("\n"); |
cae2ed9a IM |
1483 | |
1484 | #define DO_TESTCASE_3RW(desc, name, nr) \ | |
1485 | print_testname(desc"/"#nr); \ | |
1486 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ | |
1487 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1488 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1489 | pr_cont("\n"); |
cae2ed9a | 1490 | |
31e0d747 BF |
1491 | #define DO_TESTCASE_2RW(desc, name, nr) \ |
1492 | print_testname(desc"/"#nr); \ | |
1493 | pr_cont(" |"); \ | |
1494 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1495 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1496 | pr_cont("\n"); | |
1497 | ||
1498 | #define DO_TESTCASE_2x2RW(desc, name, nr) \ | |
1499 | DO_TESTCASE_2RW("hard-"desc, name##_hard, nr) \ | |
1500 | DO_TESTCASE_2RW("soft-"desc, name##_soft, nr) \ | |
1501 | ||
1502 | #define DO_TESTCASE_6x2x2RW(desc, name) \ | |
1503 | DO_TESTCASE_2x2RW(desc, name, 123); \ | |
1504 | DO_TESTCASE_2x2RW(desc, name, 132); \ | |
1505 | DO_TESTCASE_2x2RW(desc, name, 213); \ | |
1506 | DO_TESTCASE_2x2RW(desc, name, 231); \ | |
1507 | DO_TESTCASE_2x2RW(desc, name, 312); \ | |
1508 | DO_TESTCASE_2x2RW(desc, name, 321); | |
1509 | ||
cae2ed9a IM |
1510 | #define DO_TESTCASE_6(desc, name) \ |
1511 | print_testname(desc); \ | |
1512 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1513 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1514 | dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1515 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1516 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1517 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1518 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1519 | pr_cont("\n"); |
cae2ed9a IM |
1520 | |
1521 | #define DO_TESTCASE_6_SUCCESS(desc, name) \ | |
1522 | print_testname(desc); \ | |
1523 | dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ | |
1524 | dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1525 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1526 | dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ | |
1527 | dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1528 | dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
018956d6 | 1529 | dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \ |
25139409 | 1530 | pr_cont("\n"); |
cae2ed9a IM |
1531 | |
1532 | /* | |
1533 | * 'read' variant: rlocks must not trigger. | |
1534 | */ | |
1535 | #define DO_TESTCASE_6R(desc, name) \ | |
1536 | print_testname(desc); \ | |
1537 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1538 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1539 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1540 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1541 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1542 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1543 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1544 | pr_cont("\n"); |
cae2ed9a IM |
1545 | |
1546 | #define DO_TESTCASE_2I(desc, name, nr) \ | |
1547 | DO_TESTCASE_1("hard-"desc, name##_hard, nr); \ | |
1548 | DO_TESTCASE_1("soft-"desc, name##_soft, nr); | |
1549 | ||
1550 | #define DO_TESTCASE_2IB(desc, name, nr) \ | |
1551 | DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \ | |
1552 | DO_TESTCASE_1B("soft-"desc, name##_soft, nr); | |
1553 | ||
1554 | #define DO_TESTCASE_6I(desc, name, nr) \ | |
1555 | DO_TESTCASE_3("hard-"desc, name##_hard, nr); \ | |
1556 | DO_TESTCASE_3("soft-"desc, name##_soft, nr); | |
1557 | ||
1558 | #define DO_TESTCASE_6IRW(desc, name, nr) \ | |
1559 | DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \ | |
1560 | DO_TESTCASE_3RW("soft-"desc, name##_soft, nr); | |
1561 | ||
1562 | #define DO_TESTCASE_2x3(desc, name) \ | |
1563 | DO_TESTCASE_3(desc, name, 12); \ | |
1564 | DO_TESTCASE_3(desc, name, 21); | |
1565 | ||
1566 | #define DO_TESTCASE_2x6(desc, name) \ | |
1567 | DO_TESTCASE_6I(desc, name, 12); \ | |
1568 | DO_TESTCASE_6I(desc, name, 21); | |
1569 | ||
1570 | #define DO_TESTCASE_6x2(desc, name) \ | |
1571 | DO_TESTCASE_2I(desc, name, 123); \ | |
1572 | DO_TESTCASE_2I(desc, name, 132); \ | |
1573 | DO_TESTCASE_2I(desc, name, 213); \ | |
1574 | DO_TESTCASE_2I(desc, name, 231); \ | |
1575 | DO_TESTCASE_2I(desc, name, 312); \ | |
1576 | DO_TESTCASE_2I(desc, name, 321); | |
1577 | ||
1578 | #define DO_TESTCASE_6x2B(desc, name) \ | |
1579 | DO_TESTCASE_2IB(desc, name, 123); \ | |
1580 | DO_TESTCASE_2IB(desc, name, 132); \ | |
1581 | DO_TESTCASE_2IB(desc, name, 213); \ | |
1582 | DO_TESTCASE_2IB(desc, name, 231); \ | |
1583 | DO_TESTCASE_2IB(desc, name, 312); \ | |
1584 | DO_TESTCASE_2IB(desc, name, 321); | |
1585 | ||
8ef7ca75 BF |
1586 | #define DO_TESTCASE_6x1RR(desc, name) \ |
1587 | DO_TESTCASE_1RR(desc, name, 123); \ | |
1588 | DO_TESTCASE_1RR(desc, name, 132); \ | |
1589 | DO_TESTCASE_1RR(desc, name, 213); \ | |
1590 | DO_TESTCASE_1RR(desc, name, 231); \ | |
1591 | DO_TESTCASE_1RR(desc, name, 312); \ | |
1592 | DO_TESTCASE_1RR(desc, name, 321); | |
1593 | ||
1594 | #define DO_TESTCASE_6x1RRB(desc, name) \ | |
1595 | DO_TESTCASE_1RRB(desc, name, 123); \ | |
1596 | DO_TESTCASE_1RRB(desc, name, 132); \ | |
1597 | DO_TESTCASE_1RRB(desc, name, 213); \ | |
1598 | DO_TESTCASE_1RRB(desc, name, 231); \ | |
1599 | DO_TESTCASE_1RRB(desc, name, 312); \ | |
1600 | DO_TESTCASE_1RRB(desc, name, 321); | |
1601 | ||
cae2ed9a IM |
1602 | #define DO_TESTCASE_6x6(desc, name) \ |
1603 | DO_TESTCASE_6I(desc, name, 123); \ | |
1604 | DO_TESTCASE_6I(desc, name, 132); \ | |
1605 | DO_TESTCASE_6I(desc, name, 213); \ | |
1606 | DO_TESTCASE_6I(desc, name, 231); \ | |
1607 | DO_TESTCASE_6I(desc, name, 312); \ | |
1608 | DO_TESTCASE_6I(desc, name, 321); | |
1609 | ||
1610 | #define DO_TESTCASE_6x6RW(desc, name) \ | |
1611 | DO_TESTCASE_6IRW(desc, name, 123); \ | |
1612 | DO_TESTCASE_6IRW(desc, name, 132); \ | |
1613 | DO_TESTCASE_6IRW(desc, name, 213); \ | |
1614 | DO_TESTCASE_6IRW(desc, name, 231); \ | |
1615 | DO_TESTCASE_6IRW(desc, name, 312); \ | |
1616 | DO_TESTCASE_6IRW(desc, name, 321); | |
1617 | ||
1de99445 ML |
1618 | static void ww_test_fail_acquire(void) |
1619 | { | |
1620 | int ret; | |
1621 | ||
1622 | WWAI(&t); | |
1623 | t.stamp++; | |
1624 | ||
1625 | ret = WWL(&o, &t); | |
1626 | ||
1627 | if (WARN_ON(!o.ctx) || | |
1628 | WARN_ON(ret)) | |
1629 | return; | |
1630 | ||
1631 | /* No lockdep test, pure API */ | |
1632 | ret = WWL(&o, &t); | |
1633 | WARN_ON(ret != -EALREADY); | |
1634 | ||
1635 | ret = WWT(&o); | |
1636 | WARN_ON(ret); | |
1637 | ||
1638 | t2 = t; | |
1639 | t2.stamp++; | |
1640 | ret = WWL(&o, &t2); | |
1641 | WARN_ON(ret != -EDEADLK); | |
1642 | WWU(&o); | |
1643 | ||
1644 | if (WWT(&o)) | |
1645 | WWU(&o); | |
1646 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
1647 | else | |
1648 | DEBUG_LOCKS_WARN_ON(1); | |
1649 | #endif | |
1650 | } | |
1651 | ||
2fe3d4b1 ML |
1652 | static void ww_test_normal(void) |
1653 | { | |
1654 | int ret; | |
1655 | ||
1656 | WWAI(&t); | |
1657 | ||
1658 | /* | |
1659 | * None of the ww_mutex codepaths should be taken in the 'normal' | |
1660 | * mutex calls. The easiest way to verify this is by using the | |
1661 | * normal mutex calls, and making sure o.ctx is unmodified. | |
1662 | */ | |
1663 | ||
1664 | /* mutex_lock (and indirectly, mutex_lock_nested) */ | |
1665 | o.ctx = (void *)~0UL; | |
1666 | mutex_lock(&o.base); | |
1667 | mutex_unlock(&o.base); | |
1668 | WARN_ON(o.ctx != (void *)~0UL); | |
1669 | ||
1670 | /* mutex_lock_interruptible (and *_nested) */ | |
1671 | o.ctx = (void *)~0UL; | |
1672 | ret = mutex_lock_interruptible(&o.base); | |
1673 | if (!ret) | |
1674 | mutex_unlock(&o.base); | |
1675 | else | |
1676 | WARN_ON(1); | |
1677 | WARN_ON(o.ctx != (void *)~0UL); | |
1678 | ||
1679 | /* mutex_lock_killable (and *_nested) */ | |
1680 | o.ctx = (void *)~0UL; | |
1681 | ret = mutex_lock_killable(&o.base); | |
1682 | if (!ret) | |
1683 | mutex_unlock(&o.base); | |
1684 | else | |
1685 | WARN_ON(1); | |
1686 | WARN_ON(o.ctx != (void *)~0UL); | |
1687 | ||
1688 | /* trylock, succeeding */ | |
1689 | o.ctx = (void *)~0UL; | |
1690 | ret = mutex_trylock(&o.base); | |
1691 | WARN_ON(!ret); | |
1692 | if (ret) | |
1693 | mutex_unlock(&o.base); | |
1694 | else | |
1695 | WARN_ON(1); | |
1696 | WARN_ON(o.ctx != (void *)~0UL); | |
1697 | ||
1698 | /* trylock, failing */ | |
1699 | o.ctx = (void *)~0UL; | |
1700 | mutex_lock(&o.base); | |
1701 | ret = mutex_trylock(&o.base); | |
1702 | WARN_ON(ret); | |
1703 | mutex_unlock(&o.base); | |
1704 | WARN_ON(o.ctx != (void *)~0UL); | |
1705 | ||
1706 | /* nest_lock */ | |
1707 | o.ctx = (void *)~0UL; | |
1708 | mutex_lock_nest_lock(&o.base, &t); | |
1709 | mutex_unlock(&o.base); | |
1710 | WARN_ON(o.ctx != (void *)~0UL); | |
1711 | } | |
1712 | ||
1de99445 ML |
1713 | static void ww_test_two_contexts(void) |
1714 | { | |
1715 | WWAI(&t); | |
1716 | WWAI(&t2); | |
1717 | } | |
1718 | ||
1719 | static void ww_test_diff_class(void) | |
1720 | { | |
1721 | WWAI(&t); | |
1722 | #ifdef CONFIG_DEBUG_MUTEXES | |
1723 | t.ww_class = NULL; | |
1724 | #endif | |
1725 | WWL(&o, &t); | |
1726 | } | |
1727 | ||
1728 | static void ww_test_context_done_twice(void) | |
1729 | { | |
1730 | WWAI(&t); | |
1731 | WWAD(&t); | |
1732 | WWAD(&t); | |
1733 | WWAF(&t); | |
1734 | } | |
1735 | ||
1736 | static void ww_test_context_unlock_twice(void) | |
1737 | { | |
1738 | WWAI(&t); | |
1739 | WWAD(&t); | |
1740 | WWAF(&t); | |
1741 | WWAF(&t); | |
1742 | } | |
1743 | ||
1744 | static void ww_test_context_fini_early(void) | |
1745 | { | |
1746 | WWAI(&t); | |
1747 | WWL(&o, &t); | |
1748 | WWAD(&t); | |
1749 | WWAF(&t); | |
1750 | } | |
1751 | ||
1752 | static void ww_test_context_lock_after_done(void) | |
1753 | { | |
1754 | WWAI(&t); | |
1755 | WWAD(&t); | |
1756 | WWL(&o, &t); | |
1757 | } | |
1758 | ||
1759 | static void ww_test_object_unlock_twice(void) | |
1760 | { | |
1761 | WWL1(&o); | |
1762 | WWU(&o); | |
1763 | WWU(&o); | |
1764 | } | |
1765 | ||
1766 | static void ww_test_object_lock_unbalanced(void) | |
1767 | { | |
1768 | WWAI(&t); | |
1769 | WWL(&o, &t); | |
1770 | t.acquired = 0; | |
1771 | WWU(&o); | |
1772 | WWAF(&t); | |
1773 | } | |
1774 | ||
1775 | static void ww_test_object_lock_stale_context(void) | |
1776 | { | |
1777 | WWAI(&t); | |
1778 | o.ctx = &t2; | |
1779 | WWL(&o, &t); | |
1780 | } | |
1781 | ||
f3cf139e ML |
1782 | static void ww_test_edeadlk_normal(void) |
1783 | { | |
1784 | int ret; | |
1785 | ||
1786 | mutex_lock(&o2.base); | |
1787 | o2.ctx = &t2; | |
5facae4f | 1788 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1789 | |
1790 | WWAI(&t); | |
1791 | t2 = t; | |
1792 | t2.stamp--; | |
1793 | ||
1794 | ret = WWL(&o, &t); | |
1795 | WARN_ON(ret); | |
1796 | ||
1797 | ret = WWL(&o2, &t); | |
1798 | WARN_ON(ret != -EDEADLK); | |
1799 | ||
1800 | o2.ctx = NULL; | |
1801 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1802 | mutex_unlock(&o2.base); | |
1803 | WWU(&o); | |
1804 | ||
1805 | WWL(&o2, &t); | |
1806 | } | |
1807 | ||
1808 | static void ww_test_edeadlk_normal_slow(void) | |
1809 | { | |
1810 | int ret; | |
1811 | ||
1812 | mutex_lock(&o2.base); | |
5facae4f | 1813 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1814 | o2.ctx = &t2; |
1815 | ||
1816 | WWAI(&t); | |
1817 | t2 = t; | |
1818 | t2.stamp--; | |
1819 | ||
1820 | ret = WWL(&o, &t); | |
1821 | WARN_ON(ret); | |
1822 | ||
1823 | ret = WWL(&o2, &t); | |
1824 | WARN_ON(ret != -EDEADLK); | |
1825 | ||
1826 | o2.ctx = NULL; | |
1827 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1828 | mutex_unlock(&o2.base); | |
1829 | WWU(&o); | |
1830 | ||
1831 | ww_mutex_lock_slow(&o2, &t); | |
1832 | } | |
1833 | ||
1834 | static void ww_test_edeadlk_no_unlock(void) | |
1835 | { | |
1836 | int ret; | |
1837 | ||
1838 | mutex_lock(&o2.base); | |
1839 | o2.ctx = &t2; | |
5facae4f | 1840 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1841 | |
1842 | WWAI(&t); | |
1843 | t2 = t; | |
1844 | t2.stamp--; | |
1845 | ||
1846 | ret = WWL(&o, &t); | |
1847 | WARN_ON(ret); | |
1848 | ||
1849 | ret = WWL(&o2, &t); | |
1850 | WARN_ON(ret != -EDEADLK); | |
1851 | ||
1852 | o2.ctx = NULL; | |
1853 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1854 | mutex_unlock(&o2.base); | |
1855 | ||
1856 | WWL(&o2, &t); | |
1857 | } | |
1858 | ||
1859 | static void ww_test_edeadlk_no_unlock_slow(void) | |
1860 | { | |
1861 | int ret; | |
1862 | ||
1863 | mutex_lock(&o2.base); | |
5facae4f | 1864 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1865 | o2.ctx = &t2; |
1866 | ||
1867 | WWAI(&t); | |
1868 | t2 = t; | |
1869 | t2.stamp--; | |
1870 | ||
1871 | ret = WWL(&o, &t); | |
1872 | WARN_ON(ret); | |
1873 | ||
1874 | ret = WWL(&o2, &t); | |
1875 | WARN_ON(ret != -EDEADLK); | |
1876 | ||
1877 | o2.ctx = NULL; | |
1878 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1879 | mutex_unlock(&o2.base); | |
1880 | ||
1881 | ww_mutex_lock_slow(&o2, &t); | |
1882 | } | |
1883 | ||
1884 | static void ww_test_edeadlk_acquire_more(void) | |
1885 | { | |
1886 | int ret; | |
1887 | ||
1888 | mutex_lock(&o2.base); | |
5facae4f | 1889 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1890 | o2.ctx = &t2; |
1891 | ||
1892 | WWAI(&t); | |
1893 | t2 = t; | |
1894 | t2.stamp--; | |
1895 | ||
1896 | ret = WWL(&o, &t); | |
1897 | WARN_ON(ret); | |
1898 | ||
1899 | ret = WWL(&o2, &t); | |
1900 | WARN_ON(ret != -EDEADLK); | |
1901 | ||
1902 | ret = WWL(&o3, &t); | |
1903 | } | |
1904 | ||
1905 | static void ww_test_edeadlk_acquire_more_slow(void) | |
1906 | { | |
1907 | int ret; | |
1908 | ||
1909 | mutex_lock(&o2.base); | |
5facae4f | 1910 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1911 | o2.ctx = &t2; |
1912 | ||
1913 | WWAI(&t); | |
1914 | t2 = t; | |
1915 | t2.stamp--; | |
1916 | ||
1917 | ret = WWL(&o, &t); | |
1918 | WARN_ON(ret); | |
1919 | ||
1920 | ret = WWL(&o2, &t); | |
1921 | WARN_ON(ret != -EDEADLK); | |
1922 | ||
1923 | ww_mutex_lock_slow(&o3, &t); | |
1924 | } | |
1925 | ||
1926 | static void ww_test_edeadlk_acquire_more_edeadlk(void) | |
1927 | { | |
1928 | int ret; | |
1929 | ||
1930 | mutex_lock(&o2.base); | |
5facae4f | 1931 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1932 | o2.ctx = &t2; |
1933 | ||
1934 | mutex_lock(&o3.base); | |
5facae4f | 1935 | mutex_release(&o3.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1936 | o3.ctx = &t2; |
1937 | ||
1938 | WWAI(&t); | |
1939 | t2 = t; | |
1940 | t2.stamp--; | |
1941 | ||
1942 | ret = WWL(&o, &t); | |
1943 | WARN_ON(ret); | |
1944 | ||
1945 | ret = WWL(&o2, &t); | |
1946 | WARN_ON(ret != -EDEADLK); | |
1947 | ||
1948 | ret = WWL(&o3, &t); | |
1949 | WARN_ON(ret != -EDEADLK); | |
1950 | } | |
1951 | ||
1952 | static void ww_test_edeadlk_acquire_more_edeadlk_slow(void) | |
1953 | { | |
1954 | int ret; | |
1955 | ||
1956 | mutex_lock(&o2.base); | |
5facae4f | 1957 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1958 | o2.ctx = &t2; |
1959 | ||
1960 | mutex_lock(&o3.base); | |
5facae4f | 1961 | mutex_release(&o3.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1962 | o3.ctx = &t2; |
1963 | ||
1964 | WWAI(&t); | |
1965 | t2 = t; | |
1966 | t2.stamp--; | |
1967 | ||
1968 | ret = WWL(&o, &t); | |
1969 | WARN_ON(ret); | |
1970 | ||
1971 | ret = WWL(&o2, &t); | |
1972 | WARN_ON(ret != -EDEADLK); | |
1973 | ||
1974 | ww_mutex_lock_slow(&o3, &t); | |
1975 | } | |
1976 | ||
1977 | static void ww_test_edeadlk_acquire_wrong(void) | |
1978 | { | |
1979 | int ret; | |
1980 | ||
1981 | mutex_lock(&o2.base); | |
5facae4f | 1982 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
1983 | o2.ctx = &t2; |
1984 | ||
1985 | WWAI(&t); | |
1986 | t2 = t; | |
1987 | t2.stamp--; | |
1988 | ||
1989 | ret = WWL(&o, &t); | |
1990 | WARN_ON(ret); | |
1991 | ||
1992 | ret = WWL(&o2, &t); | |
1993 | WARN_ON(ret != -EDEADLK); | |
1994 | if (!ret) | |
1995 | WWU(&o2); | |
1996 | ||
1997 | WWU(&o); | |
1998 | ||
1999 | ret = WWL(&o3, &t); | |
2000 | } | |
2001 | ||
2002 | static void ww_test_edeadlk_acquire_wrong_slow(void) | |
2003 | { | |
2004 | int ret; | |
2005 | ||
2006 | mutex_lock(&o2.base); | |
5facae4f | 2007 | mutex_release(&o2.base.dep_map, _THIS_IP_); |
f3cf139e ML |
2008 | o2.ctx = &t2; |
2009 | ||
2010 | WWAI(&t); | |
2011 | t2 = t; | |
2012 | t2.stamp--; | |
2013 | ||
2014 | ret = WWL(&o, &t); | |
2015 | WARN_ON(ret); | |
2016 | ||
2017 | ret = WWL(&o2, &t); | |
2018 | WARN_ON(ret != -EDEADLK); | |
2019 | if (!ret) | |
2020 | WWU(&o2); | |
2021 | ||
2022 | WWU(&o); | |
2023 | ||
2024 | ww_mutex_lock_slow(&o3, &t); | |
2025 | } | |
2026 | ||
1de99445 ML |
2027 | static void ww_test_spin_nest_unlocked(void) |
2028 | { | |
a2e9ae58 | 2029 | spin_lock_nest_lock(&lock_A, &o.base); |
1de99445 ML |
2030 | U(A); |
2031 | } | |
2032 | ||
e04ce676 BF |
2033 | /* This is not a deadlock, because we have X1 to serialize Y1 and Y2 */ |
2034 | static void ww_test_spin_nest_lock(void) | |
2035 | { | |
2036 | spin_lock(&lock_X1); | |
2037 | spin_lock_nest_lock(&lock_Y1, &lock_X1); | |
2038 | spin_lock(&lock_A); | |
2039 | spin_lock_nest_lock(&lock_Y2, &lock_X1); | |
2040 | spin_unlock(&lock_A); | |
2041 | spin_unlock(&lock_Y2); | |
2042 | spin_unlock(&lock_Y1); | |
2043 | spin_unlock(&lock_X1); | |
2044 | } | |
2045 | ||
1de99445 ML |
2046 | static void ww_test_unneeded_slow(void) |
2047 | { | |
2048 | WWAI(&t); | |
2049 | ||
2050 | ww_mutex_lock_slow(&o, &t); | |
2051 | } | |
2052 | ||
2053 | static void ww_test_context_block(void) | |
2054 | { | |
2055 | int ret; | |
2056 | ||
2057 | WWAI(&t); | |
2058 | ||
2059 | ret = WWL(&o, &t); | |
2060 | WARN_ON(ret); | |
2061 | WWL1(&o2); | |
2062 | } | |
2063 | ||
2064 | static void ww_test_context_try(void) | |
2065 | { | |
2066 | int ret; | |
2067 | ||
2068 | WWAI(&t); | |
2069 | ||
2070 | ret = WWL(&o, &t); | |
2071 | WARN_ON(ret); | |
2072 | ||
2073 | ret = WWT(&o2); | |
2074 | WARN_ON(!ret); | |
2075 | WWU(&o2); | |
2076 | WWU(&o); | |
2077 | } | |
2078 | ||
2079 | static void ww_test_context_context(void) | |
2080 | { | |
2081 | int ret; | |
2082 | ||
2083 | WWAI(&t); | |
2084 | ||
2085 | ret = WWL(&o, &t); | |
2086 | WARN_ON(ret); | |
2087 | ||
2088 | ret = WWL(&o2, &t); | |
2089 | WARN_ON(ret); | |
2090 | ||
2091 | WWU(&o2); | |
2092 | WWU(&o); | |
2093 | } | |
2094 | ||
2095 | static void ww_test_try_block(void) | |
2096 | { | |
2097 | bool ret; | |
2098 | ||
2099 | ret = WWT(&o); | |
2100 | WARN_ON(!ret); | |
2101 | ||
2102 | WWL1(&o2); | |
2103 | WWU(&o2); | |
2104 | WWU(&o); | |
2105 | } | |
2106 | ||
2107 | static void ww_test_try_try(void) | |
2108 | { | |
2109 | bool ret; | |
2110 | ||
2111 | ret = WWT(&o); | |
2112 | WARN_ON(!ret); | |
2113 | ret = WWT(&o2); | |
2114 | WARN_ON(!ret); | |
2115 | WWU(&o2); | |
2116 | WWU(&o); | |
2117 | } | |
2118 | ||
2119 | static void ww_test_try_context(void) | |
2120 | { | |
2121 | int ret; | |
2122 | ||
2123 | ret = WWT(&o); | |
2124 | WARN_ON(!ret); | |
2125 | ||
2126 | WWAI(&t); | |
2127 | ||
2128 | ret = WWL(&o2, &t); | |
2129 | WARN_ON(ret); | |
2130 | } | |
2131 | ||
2132 | static void ww_test_block_block(void) | |
2133 | { | |
2134 | WWL1(&o); | |
2135 | WWL1(&o2); | |
2136 | } | |
2137 | ||
2138 | static void ww_test_block_try(void) | |
2139 | { | |
2140 | bool ret; | |
2141 | ||
2142 | WWL1(&o); | |
2143 | ret = WWT(&o2); | |
2144 | WARN_ON(!ret); | |
2145 | } | |
2146 | ||
2147 | static void ww_test_block_context(void) | |
2148 | { | |
2149 | int ret; | |
2150 | ||
2151 | WWL1(&o); | |
2152 | WWAI(&t); | |
2153 | ||
2154 | ret = WWL(&o2, &t); | |
2155 | WARN_ON(ret); | |
2156 | } | |
2157 | ||
2158 | static void ww_test_spin_block(void) | |
2159 | { | |
2160 | L(A); | |
2161 | U(A); | |
2162 | ||
2163 | WWL1(&o); | |
2164 | L(A); | |
2165 | U(A); | |
2166 | WWU(&o); | |
2167 | ||
2168 | L(A); | |
2169 | WWL1(&o); | |
2170 | WWU(&o); | |
2171 | U(A); | |
2172 | } | |
2173 | ||
2174 | static void ww_test_spin_try(void) | |
2175 | { | |
2176 | bool ret; | |
2177 | ||
2178 | L(A); | |
2179 | U(A); | |
2180 | ||
2181 | ret = WWT(&o); | |
2182 | WARN_ON(!ret); | |
2183 | L(A); | |
2184 | U(A); | |
2185 | WWU(&o); | |
2186 | ||
2187 | L(A); | |
2188 | ret = WWT(&o); | |
2189 | WARN_ON(!ret); | |
2190 | WWU(&o); | |
2191 | U(A); | |
2192 | } | |
2193 | ||
2194 | static void ww_test_spin_context(void) | |
2195 | { | |
2196 | int ret; | |
2197 | ||
2198 | L(A); | |
2199 | U(A); | |
2200 | ||
2201 | WWAI(&t); | |
2202 | ||
2203 | ret = WWL(&o, &t); | |
2204 | WARN_ON(ret); | |
2205 | L(A); | |
2206 | U(A); | |
2207 | WWU(&o); | |
2208 | ||
2209 | L(A); | |
2210 | ret = WWL(&o, &t); | |
2211 | WARN_ON(ret); | |
2212 | WWU(&o); | |
2213 | U(A); | |
2214 | } | |
2215 | ||
2216 | static void ww_tests(void) | |
2217 | { | |
2218 | printk(" --------------------------------------------------------------------------\n"); | |
2219 | printk(" | Wound/wait tests |\n"); | |
2220 | printk(" ---------------------\n"); | |
2221 | ||
2222 | print_testname("ww api failures"); | |
2223 | dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW); | |
2fe3d4b1 | 2224 | dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
1de99445 | 2225 | dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
25139409 | 2226 | pr_cont("\n"); |
1de99445 ML |
2227 | |
2228 | print_testname("ww contexts mixing"); | |
2229 | dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW); | |
2230 | dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW); | |
25139409 | 2231 | pr_cont("\n"); |
1de99445 ML |
2232 | |
2233 | print_testname("finishing ww context"); | |
2234 | dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW); | |
2235 | dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW); | |
2236 | dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW); | |
2237 | dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW); | |
25139409 | 2238 | pr_cont("\n"); |
1de99445 ML |
2239 | |
2240 | print_testname("locking mismatches"); | |
2241 | dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW); | |
2242 | dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW); | |
2243 | dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2244 | pr_cont("\n"); |
1de99445 | 2245 | |
f3cf139e ML |
2246 | print_testname("EDEADLK handling"); |
2247 | dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW); | |
2248 | dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW); | |
2249 | dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW); | |
2250 | dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW); | |
2251 | dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW); | |
2252 | dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW); | |
2253 | dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW); | |
2254 | dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW); | |
2255 | dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW); | |
2256 | dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW); | |
25139409 | 2257 | pr_cont("\n"); |
f3cf139e | 2258 | |
1de99445 ML |
2259 | print_testname("spinlock nest unlocked"); |
2260 | dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW); | |
25139409 | 2261 | pr_cont("\n"); |
1de99445 | 2262 | |
e04ce676 BF |
2263 | print_testname("spinlock nest test"); |
2264 | dotest(ww_test_spin_nest_lock, SUCCESS, LOCKTYPE_WW); | |
2265 | pr_cont("\n"); | |
2266 | ||
1de99445 ML |
2267 | printk(" -----------------------------------------------------\n"); |
2268 | printk(" |block | try |context|\n"); | |
2269 | printk(" -----------------------------------------------------\n"); | |
2270 | ||
2271 | print_testname("context"); | |
2272 | dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW); | |
2273 | dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW); | |
2274 | dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW); | |
25139409 | 2275 | pr_cont("\n"); |
1de99445 ML |
2276 | |
2277 | print_testname("try"); | |
2278 | dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW); | |
2279 | dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW); | |
2280 | dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2281 | pr_cont("\n"); |
1de99445 ML |
2282 | |
2283 | print_testname("block"); | |
2284 | dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW); | |
2285 | dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW); | |
2286 | dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2287 | pr_cont("\n"); |
1de99445 ML |
2288 | |
2289 | print_testname("spinlock"); | |
2290 | dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW); | |
2291 | dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW); | |
2292 | dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 2293 | pr_cont("\n"); |
1de99445 | 2294 | } |
cae2ed9a | 2295 | |
ad56450d BF |
2296 | |
2297 | /* | |
2298 | * <in hardirq handler> | |
2299 | * read_lock(&A); | |
2300 | * <hardirq disable> | |
2301 | * spin_lock(&B); | |
2302 | * spin_lock(&B); | |
2303 | * read_lock(&A); | |
2304 | * | |
2305 | * is a deadlock. | |
2306 | */ | |
2307 | static void queued_read_lock_hardirq_RE_Er(void) | |
2308 | { | |
2309 | HARDIRQ_ENTER(); | |
2310 | read_lock(&rwlock_A); | |
2311 | LOCK(B); | |
2312 | UNLOCK(B); | |
2313 | read_unlock(&rwlock_A); | |
2314 | HARDIRQ_EXIT(); | |
2315 | ||
2316 | HARDIRQ_DISABLE(); | |
2317 | LOCK(B); | |
2318 | read_lock(&rwlock_A); | |
2319 | read_unlock(&rwlock_A); | |
2320 | UNLOCK(B); | |
2321 | HARDIRQ_ENABLE(); | |
2322 | } | |
2323 | ||
2324 | /* | |
2325 | * <in hardirq handler> | |
2326 | * spin_lock(&B); | |
2327 | * <hardirq disable> | |
2328 | * read_lock(&A); | |
2329 | * read_lock(&A); | |
2330 | * spin_lock(&B); | |
2331 | * | |
2332 | * is not a deadlock. | |
2333 | */ | |
2334 | static void queued_read_lock_hardirq_ER_rE(void) | |
2335 | { | |
2336 | HARDIRQ_ENTER(); | |
2337 | LOCK(B); | |
2338 | read_lock(&rwlock_A); | |
2339 | read_unlock(&rwlock_A); | |
2340 | UNLOCK(B); | |
2341 | HARDIRQ_EXIT(); | |
2342 | ||
2343 | HARDIRQ_DISABLE(); | |
2344 | read_lock(&rwlock_A); | |
2345 | LOCK(B); | |
2346 | UNLOCK(B); | |
2347 | read_unlock(&rwlock_A); | |
2348 | HARDIRQ_ENABLE(); | |
2349 | } | |
2350 | ||
2351 | /* | |
2352 | * <hardirq disable> | |
2353 | * spin_lock(&B); | |
2354 | * read_lock(&A); | |
2355 | * <in hardirq handler> | |
2356 | * spin_lock(&B); | |
2357 | * read_lock(&A); | |
2358 | * | |
2359 | * is a deadlock. Because the two read_lock()s are both non-recursive readers. | |
2360 | */ | |
2361 | static void queued_read_lock_hardirq_inversion(void) | |
2362 | { | |
2363 | ||
2364 | HARDIRQ_ENTER(); | |
2365 | LOCK(B); | |
2366 | UNLOCK(B); | |
2367 | HARDIRQ_EXIT(); | |
2368 | ||
2369 | HARDIRQ_DISABLE(); | |
2370 | LOCK(B); | |
2371 | read_lock(&rwlock_A); | |
2372 | read_unlock(&rwlock_A); | |
2373 | UNLOCK(B); | |
2374 | HARDIRQ_ENABLE(); | |
2375 | ||
2376 | read_lock(&rwlock_A); | |
2377 | read_unlock(&rwlock_A); | |
2378 | } | |
2379 | ||
2380 | static void queued_read_lock_tests(void) | |
2381 | { | |
2382 | printk(" --------------------------------------------------------------------------\n"); | |
2383 | printk(" | queued read lock tests |\n"); | |
2384 | printk(" ---------------------------\n"); | |
2385 | print_testname("hardirq read-lock/lock-read"); | |
2386 | dotest(queued_read_lock_hardirq_RE_Er, FAILURE, LOCKTYPE_RWLOCK); | |
2387 | pr_cont("\n"); | |
2388 | ||
2389 | print_testname("hardirq lock-read/read-lock"); | |
2390 | dotest(queued_read_lock_hardirq_ER_rE, SUCCESS, LOCKTYPE_RWLOCK); | |
2391 | pr_cont("\n"); | |
2392 | ||
2393 | print_testname("hardirq inversion"); | |
2394 | dotest(queued_read_lock_hardirq_inversion, FAILURE, LOCKTYPE_RWLOCK); | |
2395 | pr_cont("\n"); | |
2396 | } | |
2397 | ||
d5037d1d DV |
2398 | static void fs_reclaim_correct_nesting(void) |
2399 | { | |
2400 | fs_reclaim_acquire(GFP_KERNEL); | |
2401 | might_alloc(GFP_NOFS); | |
2402 | fs_reclaim_release(GFP_KERNEL); | |
2403 | } | |
2404 | ||
2405 | static void fs_reclaim_wrong_nesting(void) | |
2406 | { | |
2407 | fs_reclaim_acquire(GFP_KERNEL); | |
2408 | might_alloc(GFP_KERNEL); | |
2409 | fs_reclaim_release(GFP_KERNEL); | |
2410 | } | |
2411 | ||
2412 | static void fs_reclaim_protected_nesting(void) | |
2413 | { | |
2414 | unsigned int flags; | |
2415 | ||
2416 | fs_reclaim_acquire(GFP_KERNEL); | |
2417 | flags = memalloc_nofs_save(); | |
2418 | might_alloc(GFP_KERNEL); | |
2419 | memalloc_nofs_restore(flags); | |
2420 | fs_reclaim_release(GFP_KERNEL); | |
2421 | } | |
2422 | ||
2423 | static void fs_reclaim_tests(void) | |
2424 | { | |
2425 | printk(" --------------------\n"); | |
2426 | printk(" | fs_reclaim tests |\n"); | |
2427 | printk(" --------------------\n"); | |
2428 | ||
2429 | print_testname("correct nesting"); | |
2430 | dotest(fs_reclaim_correct_nesting, SUCCESS, 0); | |
2431 | pr_cont("\n"); | |
2432 | ||
2433 | print_testname("wrong nesting"); | |
2434 | dotest(fs_reclaim_wrong_nesting, FAILURE, 0); | |
2435 | pr_cont("\n"); | |
2436 | ||
2437 | print_testname("protected nesting"); | |
2438 | dotest(fs_reclaim_protected_nesting, SUCCESS, 0); | |
2439 | pr_cont("\n"); | |
2440 | } | |
2441 | ||
9271a40d BF |
2442 | #define __guard(cleanup) __maybe_unused __attribute__((__cleanup__(cleanup))) |
2443 | ||
2444 | static void hardirq_exit(int *_) | |
2445 | { | |
2446 | HARDIRQ_EXIT(); | |
2447 | } | |
2448 | ||
2449 | #define HARDIRQ_CONTEXT(name, ...) \ | |
2450 | int hardirq_guard_##name __guard(hardirq_exit); \ | |
2451 | HARDIRQ_ENTER(); | |
2452 | ||
2453 | #define NOTTHREADED_HARDIRQ_CONTEXT(name, ...) \ | |
2454 | int notthreaded_hardirq_guard_##name __guard(hardirq_exit); \ | |
2455 | local_irq_disable(); \ | |
2456 | __irq_enter(); \ | |
2457 | WARN_ON(!in_irq()); | |
2458 | ||
2459 | static void softirq_exit(int *_) | |
2460 | { | |
2461 | SOFTIRQ_EXIT(); | |
2462 | } | |
2463 | ||
2464 | #define SOFTIRQ_CONTEXT(name, ...) \ | |
2465 | int softirq_guard_##name __guard(softirq_exit); \ | |
2466 | SOFTIRQ_ENTER(); | |
2467 | ||
2468 | static void rcu_exit(int *_) | |
2469 | { | |
2470 | rcu_read_unlock(); | |
2471 | } | |
2472 | ||
2473 | #define RCU_CONTEXT(name, ...) \ | |
2474 | int rcu_guard_##name __guard(rcu_exit); \ | |
2475 | rcu_read_lock(); | |
2476 | ||
2477 | static void rcu_bh_exit(int *_) | |
2478 | { | |
2479 | rcu_read_unlock_bh(); | |
2480 | } | |
2481 | ||
2482 | #define RCU_BH_CONTEXT(name, ...) \ | |
2483 | int rcu_bh_guard_##name __guard(rcu_bh_exit); \ | |
2484 | rcu_read_lock_bh(); | |
2485 | ||
2486 | static void rcu_sched_exit(int *_) | |
2487 | { | |
2488 | rcu_read_unlock_sched(); | |
2489 | } | |
2490 | ||
2491 | #define RCU_SCHED_CONTEXT(name, ...) \ | |
2492 | int rcu_sched_guard_##name __guard(rcu_sched_exit); \ | |
2493 | rcu_read_lock_sched(); | |
2494 | ||
2495 | static void rcu_callback_exit(int *_) | |
2496 | { | |
2497 | rcu_lock_release(&rcu_callback_map); | |
2498 | } | |
2499 | ||
2500 | #define RCU_CALLBACK_CONTEXT(name, ...) \ | |
2501 | int rcu_callback_guard_##name __guard(rcu_callback_exit); \ | |
2502 | rcu_lock_acquire(&rcu_callback_map); | |
2503 | ||
2504 | ||
2505 | static void raw_spinlock_exit(raw_spinlock_t **lock) | |
2506 | { | |
2507 | raw_spin_unlock(*lock); | |
2508 | } | |
2509 | ||
2510 | #define RAW_SPINLOCK_CONTEXT(name, lock) \ | |
2511 | raw_spinlock_t *raw_spinlock_guard_##name __guard(raw_spinlock_exit) = &(lock); \ | |
2512 | raw_spin_lock(&(lock)); | |
2513 | ||
2514 | static void spinlock_exit(spinlock_t **lock) | |
2515 | { | |
2516 | spin_unlock(*lock); | |
2517 | } | |
2518 | ||
2519 | #define SPINLOCK_CONTEXT(name, lock) \ | |
2520 | spinlock_t *spinlock_guard_##name __guard(spinlock_exit) = &(lock); \ | |
2521 | spin_lock(&(lock)); | |
2522 | ||
2523 | static void mutex_exit(struct mutex **lock) | |
2524 | { | |
2525 | mutex_unlock(*lock); | |
2526 | } | |
2527 | ||
2528 | #define MUTEX_CONTEXT(name, lock) \ | |
2529 | struct mutex *mutex_guard_##name __guard(mutex_exit) = &(lock); \ | |
2530 | mutex_lock(&(lock)); | |
2531 | ||
2532 | #define GENERATE_2_CONTEXT_TESTCASE(outer, outer_lock, inner, inner_lock) \ | |
2533 | \ | |
2534 | static void __maybe_unused inner##_in_##outer(void) \ | |
2535 | { \ | |
2536 | outer##_CONTEXT(_, outer_lock); \ | |
2537 | { \ | |
2538 | inner##_CONTEXT(_, inner_lock); \ | |
2539 | } \ | |
2540 | } | |
2541 | ||
2542 | /* | |
2543 | * wait contexts (considering PREEMPT_RT) | |
2544 | * | |
2545 | * o: inner is allowed in outer | |
2546 | * x: inner is disallowed in outer | |
2547 | * | |
2548 | * \ inner | RCU | RAW_SPIN | SPIN | MUTEX | |
2549 | * outer \ | | | | | |
2550 | * ---------------+-------+----------+------+------- | |
2551 | * HARDIRQ | o | o | o | x | |
2552 | * ---------------+-------+----------+------+------- | |
2553 | * NOTTHREADED_IRQ| o | o | x | x | |
2554 | * ---------------+-------+----------+------+------- | |
2555 | * SOFTIRQ | o | o | o | x | |
2556 | * ---------------+-------+----------+------+------- | |
2557 | * RCU | o | o | o | x | |
2558 | * ---------------+-------+----------+------+------- | |
2559 | * RCU_BH | o | o | o | x | |
2560 | * ---------------+-------+----------+------+------- | |
2561 | * RCU_CALLBACK | o | o | o | x | |
2562 | * ---------------+-------+----------+------+------- | |
2563 | * RCU_SCHED | o | o | x | x | |
2564 | * ---------------+-------+----------+------+------- | |
2565 | * RAW_SPIN | o | o | x | x | |
2566 | * ---------------+-------+----------+------+------- | |
2567 | * SPIN | o | o | o | x | |
2568 | * ---------------+-------+----------+------+------- | |
2569 | * MUTEX | o | o | o | o | |
2570 | * ---------------+-------+----------+------+------- | |
2571 | */ | |
2572 | ||
2573 | #define GENERATE_2_CONTEXT_TESTCASE_FOR_ALL_OUTER(inner, inner_lock) \ | |
2574 | GENERATE_2_CONTEXT_TESTCASE(HARDIRQ, , inner, inner_lock) \ | |
2575 | GENERATE_2_CONTEXT_TESTCASE(NOTTHREADED_HARDIRQ, , inner, inner_lock) \ | |
2576 | GENERATE_2_CONTEXT_TESTCASE(SOFTIRQ, , inner, inner_lock) \ | |
2577 | GENERATE_2_CONTEXT_TESTCASE(RCU, , inner, inner_lock) \ | |
2578 | GENERATE_2_CONTEXT_TESTCASE(RCU_BH, , inner, inner_lock) \ | |
2579 | GENERATE_2_CONTEXT_TESTCASE(RCU_CALLBACK, , inner, inner_lock) \ | |
2580 | GENERATE_2_CONTEXT_TESTCASE(RCU_SCHED, , inner, inner_lock) \ | |
2581 | GENERATE_2_CONTEXT_TESTCASE(RAW_SPINLOCK, raw_lock_A, inner, inner_lock) \ | |
2582 | GENERATE_2_CONTEXT_TESTCASE(SPINLOCK, lock_A, inner, inner_lock) \ | |
2583 | GENERATE_2_CONTEXT_TESTCASE(MUTEX, mutex_A, inner, inner_lock) | |
2584 | ||
2585 | GENERATE_2_CONTEXT_TESTCASE_FOR_ALL_OUTER(RCU, ) | |
2586 | GENERATE_2_CONTEXT_TESTCASE_FOR_ALL_OUTER(RAW_SPINLOCK, raw_lock_B) | |
2587 | GENERATE_2_CONTEXT_TESTCASE_FOR_ALL_OUTER(SPINLOCK, lock_B) | |
2588 | GENERATE_2_CONTEXT_TESTCASE_FOR_ALL_OUTER(MUTEX, mutex_B) | |
2589 | ||
2590 | /* the outer context allows all kinds of preemption */ | |
2591 | #define DO_CONTEXT_TESTCASE_OUTER_PREEMPTIBLE(outer) \ | |
2592 | dotest(RCU_in_##outer, SUCCESS, LOCKTYPE_RWLOCK); \ | |
2593 | dotest(RAW_SPINLOCK_in_##outer, SUCCESS, LOCKTYPE_SPIN); \ | |
2594 | dotest(SPINLOCK_in_##outer, SUCCESS, LOCKTYPE_SPIN); \ | |
2595 | dotest(MUTEX_in_##outer, SUCCESS, LOCKTYPE_MUTEX); \ | |
2596 | ||
2597 | /* | |
2598 | * the outer context only allows the preemption introduced by spinlock_t (which | |
2599 | * is a sleepable lock for PREEMPT_RT) | |
2600 | */ | |
2601 | #define DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(outer) \ | |
2602 | dotest(RCU_in_##outer, SUCCESS, LOCKTYPE_RWLOCK); \ | |
2603 | dotest(RAW_SPINLOCK_in_##outer, SUCCESS, LOCKTYPE_SPIN); \ | |
2604 | dotest(SPINLOCK_in_##outer, SUCCESS, LOCKTYPE_SPIN); \ | |
2605 | dotest(MUTEX_in_##outer, FAILURE, LOCKTYPE_MUTEX); \ | |
2606 | ||
2607 | /* the outer doesn't allows any kind of preemption */ | |
2608 | #define DO_CONTEXT_TESTCASE_OUTER_NOT_PREEMPTIBLE(outer) \ | |
2609 | dotest(RCU_in_##outer, SUCCESS, LOCKTYPE_RWLOCK); \ | |
2610 | dotest(RAW_SPINLOCK_in_##outer, SUCCESS, LOCKTYPE_SPIN); \ | |
2611 | dotest(SPINLOCK_in_##outer, FAILURE, LOCKTYPE_SPIN); \ | |
2612 | dotest(MUTEX_in_##outer, FAILURE, LOCKTYPE_MUTEX); \ | |
2613 | ||
2614 | static void wait_context_tests(void) | |
2615 | { | |
2616 | printk(" --------------------------------------------------------------------------\n"); | |
2617 | printk(" | wait context tests |\n"); | |
2618 | printk(" --------------------------------------------------------------------------\n"); | |
2619 | printk(" | rcu | raw | spin |mutex |\n"); | |
2620 | printk(" --------------------------------------------------------------------------\n"); | |
2621 | print_testname("in hardirq context"); | |
2622 | DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(HARDIRQ); | |
2623 | pr_cont("\n"); | |
2624 | ||
2625 | print_testname("in hardirq context (not threaded)"); | |
2626 | DO_CONTEXT_TESTCASE_OUTER_NOT_PREEMPTIBLE(NOTTHREADED_HARDIRQ); | |
2627 | pr_cont("\n"); | |
2628 | ||
2629 | print_testname("in softirq context"); | |
2630 | DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(SOFTIRQ); | |
2631 | pr_cont("\n"); | |
2632 | ||
2633 | print_testname("in RCU context"); | |
2634 | DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(RCU); | |
2635 | pr_cont("\n"); | |
2636 | ||
2637 | print_testname("in RCU-bh context"); | |
2638 | DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(RCU_BH); | |
2639 | pr_cont("\n"); | |
2640 | ||
2641 | print_testname("in RCU callback context"); | |
2642 | DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(RCU_CALLBACK); | |
2643 | pr_cont("\n"); | |
2644 | ||
2645 | print_testname("in RCU-sched context"); | |
2646 | DO_CONTEXT_TESTCASE_OUTER_NOT_PREEMPTIBLE(RCU_SCHED); | |
2647 | pr_cont("\n"); | |
2648 | ||
2649 | print_testname("in RAW_SPINLOCK context"); | |
2650 | DO_CONTEXT_TESTCASE_OUTER_NOT_PREEMPTIBLE(RAW_SPINLOCK); | |
2651 | pr_cont("\n"); | |
2652 | ||
2653 | print_testname("in SPINLOCK context"); | |
2654 | DO_CONTEXT_TESTCASE_OUTER_LIMITED_PREEMPTIBLE(SPINLOCK); | |
2655 | pr_cont("\n"); | |
2656 | ||
2657 | print_testname("in MUTEX context"); | |
2658 | DO_CONTEXT_TESTCASE_OUTER_PREEMPTIBLE(MUTEX); | |
2659 | pr_cont("\n"); | |
2660 | } | |
2661 | ||
7e923e6a PZ |
2662 | static void local_lock_2(void) |
2663 | { | |
2664 | local_lock_acquire(&local_A); /* IRQ-ON */ | |
2665 | local_lock_release(&local_A); | |
2666 | ||
2667 | HARDIRQ_ENTER(); | |
2668 | spin_lock(&lock_A); /* IN-IRQ */ | |
2669 | spin_unlock(&lock_A); | |
2670 | HARDIRQ_EXIT() | |
2671 | ||
2672 | HARDIRQ_DISABLE(); | |
2673 | spin_lock(&lock_A); | |
2674 | local_lock_acquire(&local_A); /* IN-IRQ <-> IRQ-ON cycle, false */ | |
2675 | local_lock_release(&local_A); | |
2676 | spin_unlock(&lock_A); | |
2677 | HARDIRQ_ENABLE(); | |
2678 | } | |
2679 | ||
2680 | static void local_lock_3A(void) | |
2681 | { | |
2682 | local_lock_acquire(&local_A); /* IRQ-ON */ | |
2683 | spin_lock(&lock_B); /* IRQ-ON */ | |
2684 | spin_unlock(&lock_B); | |
2685 | local_lock_release(&local_A); | |
2686 | ||
2687 | HARDIRQ_ENTER(); | |
2688 | spin_lock(&lock_A); /* IN-IRQ */ | |
2689 | spin_unlock(&lock_A); | |
2690 | HARDIRQ_EXIT() | |
2691 | ||
2692 | HARDIRQ_DISABLE(); | |
2693 | spin_lock(&lock_A); | |
2694 | local_lock_acquire(&local_A); /* IN-IRQ <-> IRQ-ON cycle only if we count local_lock(), false */ | |
2695 | local_lock_release(&local_A); | |
2696 | spin_unlock(&lock_A); | |
2697 | HARDIRQ_ENABLE(); | |
2698 | } | |
2699 | ||
2700 | static void local_lock_3B(void) | |
2701 | { | |
2702 | local_lock_acquire(&local_A); /* IRQ-ON */ | |
2703 | spin_lock(&lock_B); /* IRQ-ON */ | |
2704 | spin_unlock(&lock_B); | |
2705 | local_lock_release(&local_A); | |
2706 | ||
2707 | HARDIRQ_ENTER(); | |
2708 | spin_lock(&lock_A); /* IN-IRQ */ | |
2709 | spin_unlock(&lock_A); | |
2710 | HARDIRQ_EXIT() | |
2711 | ||
2712 | HARDIRQ_DISABLE(); | |
2713 | spin_lock(&lock_A); | |
2714 | local_lock_acquire(&local_A); /* IN-IRQ <-> IRQ-ON cycle only if we count local_lock(), false */ | |
2715 | local_lock_release(&local_A); | |
2716 | spin_unlock(&lock_A); | |
2717 | HARDIRQ_ENABLE(); | |
2718 | ||
2719 | HARDIRQ_DISABLE(); | |
2720 | spin_lock(&lock_A); | |
2721 | spin_lock(&lock_B); /* IN-IRQ <-> IRQ-ON cycle, true */ | |
2722 | spin_unlock(&lock_B); | |
2723 | spin_unlock(&lock_A); | |
2724 | HARDIRQ_DISABLE(); | |
2725 | ||
2726 | } | |
2727 | ||
2728 | static void local_lock_tests(void) | |
2729 | { | |
2730 | printk(" --------------------------------------------------------------------------\n"); | |
2731 | printk(" | local_lock tests |\n"); | |
2732 | printk(" ---------------------\n"); | |
2733 | ||
2734 | print_testname("local_lock inversion 2"); | |
2735 | dotest(local_lock_2, SUCCESS, LOCKTYPE_LL); | |
2736 | pr_cont("\n"); | |
2737 | ||
2738 | print_testname("local_lock inversion 3A"); | |
2739 | dotest(local_lock_3A, SUCCESS, LOCKTYPE_LL); | |
2740 | pr_cont("\n"); | |
2741 | ||
2742 | print_testname("local_lock inversion 3B"); | |
2743 | dotest(local_lock_3B, FAILURE, LOCKTYPE_LL); | |
2744 | pr_cont("\n"); | |
2745 | } | |
2746 | ||
cae2ed9a IM |
2747 | void locking_selftest(void) |
2748 | { | |
2749 | /* | |
2750 | * Got a locking failure before the selftest ran? | |
2751 | */ | |
2752 | if (!debug_locks) { | |
2753 | printk("----------------------------------\n"); | |
2754 | printk("| Locking API testsuite disabled |\n"); | |
2755 | printk("----------------------------------\n"); | |
2756 | return; | |
2757 | } | |
2758 | ||
e9181886 BF |
2759 | /* |
2760 | * treats read_lock() as recursive read locks for testing purpose | |
2761 | */ | |
2762 | force_read_lock_recursive = 1; | |
2763 | ||
cae2ed9a IM |
2764 | /* |
2765 | * Run the testsuite: | |
2766 | */ | |
2767 | printk("------------------------\n"); | |
2768 | printk("| Locking API testsuite:\n"); | |
2769 | printk("----------------------------------------------------------------------------\n"); | |
2770 | printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n"); | |
2771 | printk(" --------------------------------------------------------------------------\n"); | |
2772 | ||
2773 | init_shared_classes(); | |
cdc84d79 | 2774 | lockdep_set_selftest_task(current); |
cae2ed9a | 2775 | |
6c9076ec | 2776 | DO_TESTCASE_6R("A-A deadlock", AA); |
cae2ed9a IM |
2777 | DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); |
2778 | DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA); | |
2779 | DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC); | |
2780 | DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA); | |
2781 | DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA); | |
2782 | DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA); | |
2783 | DO_TESTCASE_6("double unlock", double_unlock); | |
2784 | DO_TESTCASE_6("initialize held", init_held); | |
cae2ed9a IM |
2785 | |
2786 | printk(" --------------------------------------------------------------------------\n"); | |
2787 | print_testname("recursive read-lock"); | |
25139409 | 2788 | pr_cont(" |"); |
cae2ed9a | 2789 | dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 2790 | pr_cont(" |"); |
cae2ed9a | 2791 | dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2792 | pr_cont("\n"); |
cae2ed9a IM |
2793 | |
2794 | print_testname("recursive read-lock #2"); | |
25139409 | 2795 | pr_cont(" |"); |
6c9076ec | 2796 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 2797 | pr_cont(" |"); |
cae2ed9a | 2798 | dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2799 | pr_cont("\n"); |
cae2ed9a IM |
2800 | |
2801 | print_testname("mixed read-write-lock"); | |
25139409 | 2802 | pr_cont(" |"); |
cae2ed9a | 2803 | dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 2804 | pr_cont(" |"); |
cae2ed9a | 2805 | dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2806 | pr_cont("\n"); |
cae2ed9a IM |
2807 | |
2808 | print_testname("mixed write-read-lock"); | |
25139409 | 2809 | pr_cont(" |"); |
cae2ed9a | 2810 | dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 2811 | pr_cont(" |"); |
cae2ed9a | 2812 | dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 2813 | pr_cont("\n"); |
cae2ed9a | 2814 | |
e9149858 PZ |
2815 | print_testname("mixed read-lock/lock-write ABBA"); |
2816 | pr_cont(" |"); | |
2817 | dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK); | |
2818 | pr_cont(" |"); | |
2819 | dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM); | |
2820 | ||
2821 | print_testname("mixed read-lock/lock-read ABBA"); | |
2822 | pr_cont(" |"); | |
2823 | dotest(rlock_ABBA2, SUCCESS, LOCKTYPE_RWLOCK); | |
2824 | pr_cont(" |"); | |
2825 | dotest(rwsem_ABBA2, FAILURE, LOCKTYPE_RWSEM); | |
2826 | ||
2827 | print_testname("mixed write-lock/lock-write ABBA"); | |
2828 | pr_cont(" |"); | |
2829 | dotest(rlock_ABBA3, FAILURE, LOCKTYPE_RWLOCK); | |
2830 | pr_cont(" |"); | |
2831 | dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM); | |
2832 | ||
d4f200e5 BF |
2833 | print_testname("chain cached mixed R-L/L-W ABBA"); |
2834 | pr_cont(" |"); | |
2835 | dotest(rlock_chaincache_ABBA1, FAILURE, LOCKTYPE_RWLOCK); | |
2836 | ||
8ef7ca75 BF |
2837 | DO_TESTCASE_6x1RRB("rlock W1R2/W2R3/W3R1", W1R2_W2R3_W3R1); |
2838 | DO_TESTCASE_6x1RRB("rlock W1W2/R2R3/W3R1", W1W2_R2R3_W3R1); | |
2839 | DO_TESTCASE_6x1RR("rlock W1W2/R2R3/R3W1", W1W2_R2R3_R3W1); | |
2840 | DO_TESTCASE_6x1RR("rlock W1R2/R2R3/W3W1", W1R2_R2R3_W3W1); | |
2841 | ||
cae2ed9a IM |
2842 | printk(" --------------------------------------------------------------------------\n"); |
2843 | ||
2844 | /* | |
2845 | * irq-context testcases: | |
2846 | */ | |
2847 | DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1); | |
2848 | DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A); | |
2849 | DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B); | |
2850 | DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3); | |
2851 | DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4); | |
2852 | DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion); | |
2853 | ||
31e0d747 BF |
2854 | DO_TESTCASE_6x2x2RW("irq read-recursion", irq_read_recursion); |
2855 | DO_TESTCASE_6x2x2RW("irq read-recursion #2", irq_read_recursion2); | |
96a16f45 | 2856 | DO_TESTCASE_6x2x2RW("irq read-recursion #3", irq_read_recursion3); |
cae2ed9a | 2857 | |
1de99445 ML |
2858 | ww_tests(); |
2859 | ||
e9181886 BF |
2860 | force_read_lock_recursive = 0; |
2861 | /* | |
2862 | * queued_read_lock() specific test cases can be put here | |
2863 | */ | |
ad56450d BF |
2864 | if (IS_ENABLED(CONFIG_QUEUED_RWLOCKS)) |
2865 | queued_read_lock_tests(); | |
e9181886 | 2866 | |
d5037d1d DV |
2867 | fs_reclaim_tests(); |
2868 | ||
9271a40d BF |
2869 | /* Wait context test cases that are specific for RAW_LOCK_NESTING */ |
2870 | if (IS_ENABLED(CONFIG_PROVE_RAW_LOCK_NESTING)) | |
2871 | wait_context_tests(); | |
2872 | ||
7e923e6a PZ |
2873 | local_lock_tests(); |
2874 | ||
cae2ed9a IM |
2875 | if (unexpected_testcase_failures) { |
2876 | printk("-----------------------------------------------------------------\n"); | |
2877 | debug_locks = 0; | |
2878 | printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", | |
2879 | unexpected_testcase_failures, testcase_total); | |
2880 | printk("-----------------------------------------------------------------\n"); | |
2881 | } else if (expected_testcase_failures && testcase_successes) { | |
2882 | printk("--------------------------------------------------------\n"); | |
2883 | printk("%3d out of %3d testcases failed, as expected. |\n", | |
2884 | expected_testcase_failures, testcase_total); | |
2885 | printk("----------------------------------------------------\n"); | |
2886 | debug_locks = 1; | |
2887 | } else if (expected_testcase_failures && !testcase_successes) { | |
2888 | printk("--------------------------------------------------------\n"); | |
2889 | printk("All %3d testcases failed, as expected. |\n", | |
2890 | expected_testcase_failures); | |
2891 | printk("----------------------------------------\n"); | |
2892 | debug_locks = 1; | |
2893 | } else { | |
2894 | printk("-------------------------------------------------------\n"); | |
2895 | printk("Good, all %3d testcases passed! |\n", | |
2896 | testcase_successes); | |
2897 | printk("---------------------------------\n"); | |
2898 | debug_locks = 1; | |
2899 | } | |
cdc84d79 | 2900 | lockdep_set_selftest_task(NULL); |
cae2ed9a IM |
2901 | debug_locks_silent = 0; |
2902 | } |