Commit | Line | Data |
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cae2ed9a IM |
1 | /* |
2 | * lib/locking-selftest.c | |
3 | * | |
4 | * Testsuite for various locking APIs: spinlocks, rwlocks, | |
5 | * mutexes and rw-semaphores. | |
6 | * | |
7 | * It is checking both false positives and false negatives. | |
8 | * | |
9 | * Started by Ingo Molnar: | |
10 | * | |
11 | * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> | |
12 | */ | |
13 | #include <linux/rwsem.h> | |
14 | #include <linux/mutex.h> | |
1b375dc3 | 15 | #include <linux/ww_mutex.h> |
cae2ed9a IM |
16 | #include <linux/sched.h> |
17 | #include <linux/delay.h> | |
fbb9ce95 | 18 | #include <linux/lockdep.h> |
cae2ed9a IM |
19 | #include <linux/spinlock.h> |
20 | #include <linux/kallsyms.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/debug_locks.h> | |
23 | #include <linux/irqflags.h> | |
018956d6 | 24 | #include <linux/rtmutex.h> |
cae2ed9a IM |
25 | |
26 | /* | |
27 | * Change this to 1 if you want to see the failure printouts: | |
28 | */ | |
29 | static unsigned int debug_locks_verbose; | |
30 | ||
1de99445 ML |
31 | static DEFINE_WW_CLASS(ww_lockdep); |
32 | ||
cae2ed9a IM |
33 | static int __init setup_debug_locks_verbose(char *str) |
34 | { | |
35 | get_option(&str, &debug_locks_verbose); | |
36 | ||
37 | return 1; | |
38 | } | |
39 | ||
40 | __setup("debug_locks_verbose=", setup_debug_locks_verbose); | |
41 | ||
42 | #define FAILURE 0 | |
43 | #define SUCCESS 1 | |
44 | ||
45 | #define LOCKTYPE_SPIN 0x1 | |
46 | #define LOCKTYPE_RWLOCK 0x2 | |
47 | #define LOCKTYPE_MUTEX 0x4 | |
48 | #define LOCKTYPE_RWSEM 0x8 | |
1de99445 | 49 | #define LOCKTYPE_WW 0x10 |
018956d6 | 50 | #define LOCKTYPE_RTMUTEX 0x20 |
1de99445 ML |
51 | |
52 | static struct ww_acquire_ctx t, t2; | |
f3cf139e | 53 | static struct ww_mutex o, o2, o3; |
cae2ed9a IM |
54 | |
55 | /* | |
56 | * Normal standalone locks, for the circular and irq-context | |
57 | * dependency tests: | |
58 | */ | |
9fb1b90c YZ |
59 | static DEFINE_RAW_SPINLOCK(lock_A); |
60 | static DEFINE_RAW_SPINLOCK(lock_B); | |
61 | static DEFINE_RAW_SPINLOCK(lock_C); | |
62 | static DEFINE_RAW_SPINLOCK(lock_D); | |
cae2ed9a IM |
63 | |
64 | static DEFINE_RWLOCK(rwlock_A); | |
65 | static DEFINE_RWLOCK(rwlock_B); | |
66 | static DEFINE_RWLOCK(rwlock_C); | |
67 | static DEFINE_RWLOCK(rwlock_D); | |
68 | ||
69 | static DEFINE_MUTEX(mutex_A); | |
70 | static DEFINE_MUTEX(mutex_B); | |
71 | static DEFINE_MUTEX(mutex_C); | |
72 | static DEFINE_MUTEX(mutex_D); | |
73 | ||
74 | static DECLARE_RWSEM(rwsem_A); | |
75 | static DECLARE_RWSEM(rwsem_B); | |
76 | static DECLARE_RWSEM(rwsem_C); | |
77 | static DECLARE_RWSEM(rwsem_D); | |
78 | ||
018956d6 PZ |
79 | #ifdef CONFIG_RT_MUTEXES |
80 | ||
81 | static DEFINE_RT_MUTEX(rtmutex_A); | |
82 | static DEFINE_RT_MUTEX(rtmutex_B); | |
83 | static DEFINE_RT_MUTEX(rtmutex_C); | |
84 | static DEFINE_RT_MUTEX(rtmutex_D); | |
85 | ||
86 | #endif | |
87 | ||
cae2ed9a IM |
88 | /* |
89 | * Locks that we initialize dynamically as well so that | |
90 | * e.g. X1 and X2 becomes two instances of the same class, | |
91 | * but X* and Y* are different classes. We do this so that | |
92 | * we do not trigger a real lockup: | |
93 | */ | |
9fb1b90c YZ |
94 | static DEFINE_RAW_SPINLOCK(lock_X1); |
95 | static DEFINE_RAW_SPINLOCK(lock_X2); | |
96 | static DEFINE_RAW_SPINLOCK(lock_Y1); | |
97 | static DEFINE_RAW_SPINLOCK(lock_Y2); | |
98 | static DEFINE_RAW_SPINLOCK(lock_Z1); | |
99 | static DEFINE_RAW_SPINLOCK(lock_Z2); | |
cae2ed9a IM |
100 | |
101 | static DEFINE_RWLOCK(rwlock_X1); | |
102 | static DEFINE_RWLOCK(rwlock_X2); | |
103 | static DEFINE_RWLOCK(rwlock_Y1); | |
104 | static DEFINE_RWLOCK(rwlock_Y2); | |
105 | static DEFINE_RWLOCK(rwlock_Z1); | |
106 | static DEFINE_RWLOCK(rwlock_Z2); | |
107 | ||
108 | static DEFINE_MUTEX(mutex_X1); | |
109 | static DEFINE_MUTEX(mutex_X2); | |
110 | static DEFINE_MUTEX(mutex_Y1); | |
111 | static DEFINE_MUTEX(mutex_Y2); | |
112 | static DEFINE_MUTEX(mutex_Z1); | |
113 | static DEFINE_MUTEX(mutex_Z2); | |
114 | ||
115 | static DECLARE_RWSEM(rwsem_X1); | |
116 | static DECLARE_RWSEM(rwsem_X2); | |
117 | static DECLARE_RWSEM(rwsem_Y1); | |
118 | static DECLARE_RWSEM(rwsem_Y2); | |
119 | static DECLARE_RWSEM(rwsem_Z1); | |
120 | static DECLARE_RWSEM(rwsem_Z2); | |
121 | ||
018956d6 PZ |
122 | #ifdef CONFIG_RT_MUTEXES |
123 | ||
124 | static DEFINE_RT_MUTEX(rtmutex_X1); | |
125 | static DEFINE_RT_MUTEX(rtmutex_X2); | |
126 | static DEFINE_RT_MUTEX(rtmutex_Y1); | |
127 | static DEFINE_RT_MUTEX(rtmutex_Y2); | |
128 | static DEFINE_RT_MUTEX(rtmutex_Z1); | |
129 | static DEFINE_RT_MUTEX(rtmutex_Z2); | |
130 | ||
131 | #endif | |
132 | ||
cae2ed9a IM |
133 | /* |
134 | * non-inlined runtime initializers, to let separate locks share | |
135 | * the same lock-class: | |
136 | */ | |
137 | #define INIT_CLASS_FUNC(class) \ | |
138 | static noinline void \ | |
9fb1b90c YZ |
139 | init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \ |
140 | struct mutex *mutex, struct rw_semaphore *rwsem)\ | |
cae2ed9a | 141 | { \ |
9fb1b90c | 142 | raw_spin_lock_init(lock); \ |
cae2ed9a IM |
143 | rwlock_init(rwlock); \ |
144 | mutex_init(mutex); \ | |
145 | init_rwsem(rwsem); \ | |
146 | } | |
147 | ||
148 | INIT_CLASS_FUNC(X) | |
149 | INIT_CLASS_FUNC(Y) | |
150 | INIT_CLASS_FUNC(Z) | |
151 | ||
152 | static void init_shared_classes(void) | |
153 | { | |
018956d6 PZ |
154 | #ifdef CONFIG_RT_MUTEXES |
155 | static struct lock_class_key rt_X, rt_Y, rt_Z; | |
156 | ||
157 | __rt_mutex_init(&rtmutex_X1, __func__, &rt_X); | |
158 | __rt_mutex_init(&rtmutex_X2, __func__, &rt_X); | |
159 | __rt_mutex_init(&rtmutex_Y1, __func__, &rt_Y); | |
160 | __rt_mutex_init(&rtmutex_Y2, __func__, &rt_Y); | |
161 | __rt_mutex_init(&rtmutex_Z1, __func__, &rt_Z); | |
162 | __rt_mutex_init(&rtmutex_Z2, __func__, &rt_Z); | |
163 | #endif | |
164 | ||
cae2ed9a IM |
165 | init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1); |
166 | init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2); | |
167 | ||
168 | init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1); | |
169 | init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2); | |
170 | ||
171 | init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1); | |
172 | init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2); | |
173 | } | |
174 | ||
175 | /* | |
176 | * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests. | |
177 | * The following functions use a lock from a simulated hardirq/softirq | |
178 | * context, causing the locks to be marked as hardirq-safe/softirq-safe: | |
179 | */ | |
180 | ||
181 | #define HARDIRQ_DISABLE local_irq_disable | |
182 | #define HARDIRQ_ENABLE local_irq_enable | |
183 | ||
184 | #define HARDIRQ_ENTER() \ | |
185 | local_irq_disable(); \ | |
ba9f207c | 186 | __irq_enter(); \ |
cae2ed9a IM |
187 | WARN_ON(!in_irq()); |
188 | ||
189 | #define HARDIRQ_EXIT() \ | |
190 | __irq_exit(); \ | |
191 | local_irq_enable(); | |
192 | ||
193 | #define SOFTIRQ_DISABLE local_bh_disable | |
194 | #define SOFTIRQ_ENABLE local_bh_enable | |
195 | ||
196 | #define SOFTIRQ_ENTER() \ | |
197 | local_bh_disable(); \ | |
198 | local_irq_disable(); \ | |
d820ac4c | 199 | lockdep_softirq_enter(); \ |
cae2ed9a IM |
200 | WARN_ON(!in_softirq()); |
201 | ||
202 | #define SOFTIRQ_EXIT() \ | |
d820ac4c | 203 | lockdep_softirq_exit(); \ |
cae2ed9a IM |
204 | local_irq_enable(); \ |
205 | local_bh_enable(); | |
206 | ||
207 | /* | |
208 | * Shortcuts for lock/unlock API variants, to keep | |
209 | * the testcases compact: | |
210 | */ | |
9fb1b90c YZ |
211 | #define L(x) raw_spin_lock(&lock_##x) |
212 | #define U(x) raw_spin_unlock(&lock_##x) | |
cae2ed9a | 213 | #define LU(x) L(x); U(x) |
9fb1b90c | 214 | #define SI(x) raw_spin_lock_init(&lock_##x) |
cae2ed9a IM |
215 | |
216 | #define WL(x) write_lock(&rwlock_##x) | |
217 | #define WU(x) write_unlock(&rwlock_##x) | |
218 | #define WLU(x) WL(x); WU(x) | |
219 | ||
220 | #define RL(x) read_lock(&rwlock_##x) | |
221 | #define RU(x) read_unlock(&rwlock_##x) | |
222 | #define RLU(x) RL(x); RU(x) | |
223 | #define RWI(x) rwlock_init(&rwlock_##x) | |
224 | ||
225 | #define ML(x) mutex_lock(&mutex_##x) | |
226 | #define MU(x) mutex_unlock(&mutex_##x) | |
227 | #define MI(x) mutex_init(&mutex_##x) | |
228 | ||
018956d6 PZ |
229 | #define RTL(x) rt_mutex_lock(&rtmutex_##x) |
230 | #define RTU(x) rt_mutex_unlock(&rtmutex_##x) | |
231 | #define RTI(x) rt_mutex_init(&rtmutex_##x) | |
232 | ||
cae2ed9a IM |
233 | #define WSL(x) down_write(&rwsem_##x) |
234 | #define WSU(x) up_write(&rwsem_##x) | |
235 | ||
236 | #define RSL(x) down_read(&rwsem_##x) | |
237 | #define RSU(x) up_read(&rwsem_##x) | |
238 | #define RWSI(x) init_rwsem(&rwsem_##x) | |
239 | ||
1de99445 ML |
240 | #ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH |
241 | #define WWAI(x) ww_acquire_init(x, &ww_lockdep) | |
242 | #else | |
243 | #define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0) | |
244 | #endif | |
245 | #define WWAD(x) ww_acquire_done(x) | |
246 | #define WWAF(x) ww_acquire_fini(x) | |
247 | ||
248 | #define WWL(x, c) ww_mutex_lock(x, c) | |
249 | #define WWT(x) ww_mutex_trylock(x) | |
250 | #define WWL1(x) ww_mutex_lock(x, NULL) | |
251 | #define WWU(x) ww_mutex_unlock(x) | |
252 | ||
253 | ||
cae2ed9a IM |
254 | #define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x) |
255 | ||
256 | /* | |
257 | * Generate different permutations of the same testcase, using | |
258 | * the same basic lock-dependency/state events: | |
259 | */ | |
260 | ||
261 | #define GENERATE_TESTCASE(name) \ | |
262 | \ | |
263 | static void name(void) { E(); } | |
264 | ||
265 | #define GENERATE_PERMUTATIONS_2_EVENTS(name) \ | |
266 | \ | |
267 | static void name##_12(void) { E1(); E2(); } \ | |
268 | static void name##_21(void) { E2(); E1(); } | |
269 | ||
270 | #define GENERATE_PERMUTATIONS_3_EVENTS(name) \ | |
271 | \ | |
272 | static void name##_123(void) { E1(); E2(); E3(); } \ | |
273 | static void name##_132(void) { E1(); E3(); E2(); } \ | |
274 | static void name##_213(void) { E2(); E1(); E3(); } \ | |
275 | static void name##_231(void) { E2(); E3(); E1(); } \ | |
276 | static void name##_312(void) { E3(); E1(); E2(); } \ | |
277 | static void name##_321(void) { E3(); E2(); E1(); } | |
278 | ||
279 | /* | |
280 | * AA deadlock: | |
281 | */ | |
282 | ||
283 | #define E() \ | |
284 | \ | |
285 | LOCK(X1); \ | |
286 | LOCK(X2); /* this one should fail */ | |
287 | ||
288 | /* | |
289 | * 6 testcases: | |
290 | */ | |
291 | #include "locking-selftest-spin.h" | |
292 | GENERATE_TESTCASE(AA_spin) | |
293 | #include "locking-selftest-wlock.h" | |
294 | GENERATE_TESTCASE(AA_wlock) | |
295 | #include "locking-selftest-rlock.h" | |
296 | GENERATE_TESTCASE(AA_rlock) | |
297 | #include "locking-selftest-mutex.h" | |
298 | GENERATE_TESTCASE(AA_mutex) | |
299 | #include "locking-selftest-wsem.h" | |
300 | GENERATE_TESTCASE(AA_wsem) | |
301 | #include "locking-selftest-rsem.h" | |
302 | GENERATE_TESTCASE(AA_rsem) | |
303 | ||
018956d6 PZ |
304 | #ifdef CONFIG_RT_MUTEXES |
305 | #include "locking-selftest-rtmutex.h" | |
306 | GENERATE_TESTCASE(AA_rtmutex); | |
307 | #endif | |
308 | ||
cae2ed9a IM |
309 | #undef E |
310 | ||
311 | /* | |
312 | * Special-case for read-locking, they are | |
6c9076ec | 313 | * allowed to recurse on the same lock class: |
cae2ed9a IM |
314 | */ |
315 | static void rlock_AA1(void) | |
316 | { | |
317 | RL(X1); | |
318 | RL(X1); // this one should NOT fail | |
319 | } | |
320 | ||
321 | static void rlock_AA1B(void) | |
322 | { | |
323 | RL(X1); | |
6c9076ec | 324 | RL(X2); // this one should NOT fail |
cae2ed9a IM |
325 | } |
326 | ||
327 | static void rsem_AA1(void) | |
328 | { | |
329 | RSL(X1); | |
330 | RSL(X1); // this one should fail | |
331 | } | |
332 | ||
333 | static void rsem_AA1B(void) | |
334 | { | |
335 | RSL(X1); | |
336 | RSL(X2); // this one should fail | |
337 | } | |
338 | /* | |
339 | * The mixing of read and write locks is not allowed: | |
340 | */ | |
341 | static void rlock_AA2(void) | |
342 | { | |
343 | RL(X1); | |
344 | WL(X2); // this one should fail | |
345 | } | |
346 | ||
347 | static void rsem_AA2(void) | |
348 | { | |
349 | RSL(X1); | |
350 | WSL(X2); // this one should fail | |
351 | } | |
352 | ||
353 | static void rlock_AA3(void) | |
354 | { | |
355 | WL(X1); | |
356 | RL(X2); // this one should fail | |
357 | } | |
358 | ||
359 | static void rsem_AA3(void) | |
360 | { | |
361 | WSL(X1); | |
362 | RSL(X2); // this one should fail | |
363 | } | |
364 | ||
365 | /* | |
366 | * ABBA deadlock: | |
367 | */ | |
368 | ||
369 | #define E() \ | |
370 | \ | |
371 | LOCK_UNLOCK_2(A, B); \ | |
372 | LOCK_UNLOCK_2(B, A); /* fail */ | |
373 | ||
374 | /* | |
375 | * 6 testcases: | |
376 | */ | |
377 | #include "locking-selftest-spin.h" | |
378 | GENERATE_TESTCASE(ABBA_spin) | |
379 | #include "locking-selftest-wlock.h" | |
380 | GENERATE_TESTCASE(ABBA_wlock) | |
381 | #include "locking-selftest-rlock.h" | |
382 | GENERATE_TESTCASE(ABBA_rlock) | |
383 | #include "locking-selftest-mutex.h" | |
384 | GENERATE_TESTCASE(ABBA_mutex) | |
385 | #include "locking-selftest-wsem.h" | |
386 | GENERATE_TESTCASE(ABBA_wsem) | |
387 | #include "locking-selftest-rsem.h" | |
388 | GENERATE_TESTCASE(ABBA_rsem) | |
389 | ||
018956d6 PZ |
390 | #ifdef CONFIG_RT_MUTEXES |
391 | #include "locking-selftest-rtmutex.h" | |
392 | GENERATE_TESTCASE(ABBA_rtmutex); | |
393 | #endif | |
394 | ||
cae2ed9a IM |
395 | #undef E |
396 | ||
397 | /* | |
398 | * AB BC CA deadlock: | |
399 | */ | |
400 | ||
401 | #define E() \ | |
402 | \ | |
403 | LOCK_UNLOCK_2(A, B); \ | |
404 | LOCK_UNLOCK_2(B, C); \ | |
405 | LOCK_UNLOCK_2(C, A); /* fail */ | |
406 | ||
407 | /* | |
408 | * 6 testcases: | |
409 | */ | |
410 | #include "locking-selftest-spin.h" | |
411 | GENERATE_TESTCASE(ABBCCA_spin) | |
412 | #include "locking-selftest-wlock.h" | |
413 | GENERATE_TESTCASE(ABBCCA_wlock) | |
414 | #include "locking-selftest-rlock.h" | |
415 | GENERATE_TESTCASE(ABBCCA_rlock) | |
416 | #include "locking-selftest-mutex.h" | |
417 | GENERATE_TESTCASE(ABBCCA_mutex) | |
418 | #include "locking-selftest-wsem.h" | |
419 | GENERATE_TESTCASE(ABBCCA_wsem) | |
420 | #include "locking-selftest-rsem.h" | |
421 | GENERATE_TESTCASE(ABBCCA_rsem) | |
422 | ||
018956d6 PZ |
423 | #ifdef CONFIG_RT_MUTEXES |
424 | #include "locking-selftest-rtmutex.h" | |
425 | GENERATE_TESTCASE(ABBCCA_rtmutex); | |
426 | #endif | |
427 | ||
cae2ed9a IM |
428 | #undef E |
429 | ||
430 | /* | |
431 | * AB CA BC deadlock: | |
432 | */ | |
433 | ||
434 | #define E() \ | |
435 | \ | |
436 | LOCK_UNLOCK_2(A, B); \ | |
437 | LOCK_UNLOCK_2(C, A); \ | |
438 | LOCK_UNLOCK_2(B, C); /* fail */ | |
439 | ||
440 | /* | |
441 | * 6 testcases: | |
442 | */ | |
443 | #include "locking-selftest-spin.h" | |
444 | GENERATE_TESTCASE(ABCABC_spin) | |
445 | #include "locking-selftest-wlock.h" | |
446 | GENERATE_TESTCASE(ABCABC_wlock) | |
447 | #include "locking-selftest-rlock.h" | |
448 | GENERATE_TESTCASE(ABCABC_rlock) | |
449 | #include "locking-selftest-mutex.h" | |
450 | GENERATE_TESTCASE(ABCABC_mutex) | |
451 | #include "locking-selftest-wsem.h" | |
452 | GENERATE_TESTCASE(ABCABC_wsem) | |
453 | #include "locking-selftest-rsem.h" | |
454 | GENERATE_TESTCASE(ABCABC_rsem) | |
455 | ||
018956d6 PZ |
456 | #ifdef CONFIG_RT_MUTEXES |
457 | #include "locking-selftest-rtmutex.h" | |
458 | GENERATE_TESTCASE(ABCABC_rtmutex); | |
459 | #endif | |
460 | ||
cae2ed9a IM |
461 | #undef E |
462 | ||
463 | /* | |
464 | * AB BC CD DA deadlock: | |
465 | */ | |
466 | ||
467 | #define E() \ | |
468 | \ | |
469 | LOCK_UNLOCK_2(A, B); \ | |
470 | LOCK_UNLOCK_2(B, C); \ | |
471 | LOCK_UNLOCK_2(C, D); \ | |
472 | LOCK_UNLOCK_2(D, A); /* fail */ | |
473 | ||
474 | /* | |
475 | * 6 testcases: | |
476 | */ | |
477 | #include "locking-selftest-spin.h" | |
478 | GENERATE_TESTCASE(ABBCCDDA_spin) | |
479 | #include "locking-selftest-wlock.h" | |
480 | GENERATE_TESTCASE(ABBCCDDA_wlock) | |
481 | #include "locking-selftest-rlock.h" | |
482 | GENERATE_TESTCASE(ABBCCDDA_rlock) | |
483 | #include "locking-selftest-mutex.h" | |
484 | GENERATE_TESTCASE(ABBCCDDA_mutex) | |
485 | #include "locking-selftest-wsem.h" | |
486 | GENERATE_TESTCASE(ABBCCDDA_wsem) | |
487 | #include "locking-selftest-rsem.h" | |
488 | GENERATE_TESTCASE(ABBCCDDA_rsem) | |
489 | ||
018956d6 PZ |
490 | #ifdef CONFIG_RT_MUTEXES |
491 | #include "locking-selftest-rtmutex.h" | |
492 | GENERATE_TESTCASE(ABBCCDDA_rtmutex); | |
493 | #endif | |
494 | ||
cae2ed9a IM |
495 | #undef E |
496 | ||
497 | /* | |
498 | * AB CD BD DA deadlock: | |
499 | */ | |
500 | #define E() \ | |
501 | \ | |
502 | LOCK_UNLOCK_2(A, B); \ | |
503 | LOCK_UNLOCK_2(C, D); \ | |
504 | LOCK_UNLOCK_2(B, D); \ | |
505 | LOCK_UNLOCK_2(D, A); /* fail */ | |
506 | ||
507 | /* | |
508 | * 6 testcases: | |
509 | */ | |
510 | #include "locking-selftest-spin.h" | |
511 | GENERATE_TESTCASE(ABCDBDDA_spin) | |
512 | #include "locking-selftest-wlock.h" | |
513 | GENERATE_TESTCASE(ABCDBDDA_wlock) | |
514 | #include "locking-selftest-rlock.h" | |
515 | GENERATE_TESTCASE(ABCDBDDA_rlock) | |
516 | #include "locking-selftest-mutex.h" | |
517 | GENERATE_TESTCASE(ABCDBDDA_mutex) | |
518 | #include "locking-selftest-wsem.h" | |
519 | GENERATE_TESTCASE(ABCDBDDA_wsem) | |
520 | #include "locking-selftest-rsem.h" | |
521 | GENERATE_TESTCASE(ABCDBDDA_rsem) | |
522 | ||
018956d6 PZ |
523 | #ifdef CONFIG_RT_MUTEXES |
524 | #include "locking-selftest-rtmutex.h" | |
525 | GENERATE_TESTCASE(ABCDBDDA_rtmutex); | |
526 | #endif | |
527 | ||
cae2ed9a IM |
528 | #undef E |
529 | ||
530 | /* | |
531 | * AB CD BC DA deadlock: | |
532 | */ | |
533 | #define E() \ | |
534 | \ | |
535 | LOCK_UNLOCK_2(A, B); \ | |
536 | LOCK_UNLOCK_2(C, D); \ | |
537 | LOCK_UNLOCK_2(B, C); \ | |
538 | LOCK_UNLOCK_2(D, A); /* fail */ | |
539 | ||
540 | /* | |
541 | * 6 testcases: | |
542 | */ | |
543 | #include "locking-selftest-spin.h" | |
544 | GENERATE_TESTCASE(ABCDBCDA_spin) | |
545 | #include "locking-selftest-wlock.h" | |
546 | GENERATE_TESTCASE(ABCDBCDA_wlock) | |
547 | #include "locking-selftest-rlock.h" | |
548 | GENERATE_TESTCASE(ABCDBCDA_rlock) | |
549 | #include "locking-selftest-mutex.h" | |
550 | GENERATE_TESTCASE(ABCDBCDA_mutex) | |
551 | #include "locking-selftest-wsem.h" | |
552 | GENERATE_TESTCASE(ABCDBCDA_wsem) | |
553 | #include "locking-selftest-rsem.h" | |
554 | GENERATE_TESTCASE(ABCDBCDA_rsem) | |
555 | ||
018956d6 PZ |
556 | #ifdef CONFIG_RT_MUTEXES |
557 | #include "locking-selftest-rtmutex.h" | |
558 | GENERATE_TESTCASE(ABCDBCDA_rtmutex); | |
559 | #endif | |
560 | ||
cae2ed9a IM |
561 | #undef E |
562 | ||
563 | /* | |
564 | * Double unlock: | |
565 | */ | |
566 | #define E() \ | |
567 | \ | |
568 | LOCK(A); \ | |
569 | UNLOCK(A); \ | |
570 | UNLOCK(A); /* fail */ | |
571 | ||
572 | /* | |
573 | * 6 testcases: | |
574 | */ | |
575 | #include "locking-selftest-spin.h" | |
576 | GENERATE_TESTCASE(double_unlock_spin) | |
577 | #include "locking-selftest-wlock.h" | |
578 | GENERATE_TESTCASE(double_unlock_wlock) | |
579 | #include "locking-selftest-rlock.h" | |
580 | GENERATE_TESTCASE(double_unlock_rlock) | |
581 | #include "locking-selftest-mutex.h" | |
582 | GENERATE_TESTCASE(double_unlock_mutex) | |
583 | #include "locking-selftest-wsem.h" | |
584 | GENERATE_TESTCASE(double_unlock_wsem) | |
585 | #include "locking-selftest-rsem.h" | |
586 | GENERATE_TESTCASE(double_unlock_rsem) | |
587 | ||
018956d6 PZ |
588 | #ifdef CONFIG_RT_MUTEXES |
589 | #include "locking-selftest-rtmutex.h" | |
590 | GENERATE_TESTCASE(double_unlock_rtmutex); | |
591 | #endif | |
592 | ||
cae2ed9a IM |
593 | #undef E |
594 | ||
cae2ed9a IM |
595 | /* |
596 | * initializing a held lock: | |
597 | */ | |
598 | #define E() \ | |
599 | \ | |
600 | LOCK(A); \ | |
601 | INIT(A); /* fail */ | |
602 | ||
603 | /* | |
604 | * 6 testcases: | |
605 | */ | |
606 | #include "locking-selftest-spin.h" | |
607 | GENERATE_TESTCASE(init_held_spin) | |
608 | #include "locking-selftest-wlock.h" | |
609 | GENERATE_TESTCASE(init_held_wlock) | |
610 | #include "locking-selftest-rlock.h" | |
611 | GENERATE_TESTCASE(init_held_rlock) | |
612 | #include "locking-selftest-mutex.h" | |
613 | GENERATE_TESTCASE(init_held_mutex) | |
614 | #include "locking-selftest-wsem.h" | |
615 | GENERATE_TESTCASE(init_held_wsem) | |
616 | #include "locking-selftest-rsem.h" | |
617 | GENERATE_TESTCASE(init_held_rsem) | |
618 | ||
018956d6 PZ |
619 | #ifdef CONFIG_RT_MUTEXES |
620 | #include "locking-selftest-rtmutex.h" | |
621 | GENERATE_TESTCASE(init_held_rtmutex); | |
622 | #endif | |
623 | ||
cae2ed9a IM |
624 | #undef E |
625 | ||
626 | /* | |
627 | * locking an irq-safe lock with irqs enabled: | |
628 | */ | |
629 | #define E1() \ | |
630 | \ | |
631 | IRQ_ENTER(); \ | |
632 | LOCK(A); \ | |
633 | UNLOCK(A); \ | |
634 | IRQ_EXIT(); | |
635 | ||
636 | #define E2() \ | |
637 | \ | |
638 | LOCK(A); \ | |
639 | UNLOCK(A); | |
640 | ||
641 | /* | |
642 | * Generate 24 testcases: | |
643 | */ | |
644 | #include "locking-selftest-spin-hardirq.h" | |
645 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin) | |
646 | ||
647 | #include "locking-selftest-rlock-hardirq.h" | |
648 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock) | |
649 | ||
650 | #include "locking-selftest-wlock-hardirq.h" | |
651 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock) | |
652 | ||
653 | #include "locking-selftest-spin-softirq.h" | |
654 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin) | |
655 | ||
656 | #include "locking-selftest-rlock-softirq.h" | |
657 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock) | |
658 | ||
659 | #include "locking-selftest-wlock-softirq.h" | |
660 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock) | |
661 | ||
662 | #undef E1 | |
663 | #undef E2 | |
664 | ||
665 | /* | |
666 | * Enabling hardirqs with a softirq-safe lock held: | |
667 | */ | |
668 | #define E1() \ | |
669 | \ | |
670 | SOFTIRQ_ENTER(); \ | |
671 | LOCK(A); \ | |
672 | UNLOCK(A); \ | |
673 | SOFTIRQ_EXIT(); | |
674 | ||
675 | #define E2() \ | |
676 | \ | |
677 | HARDIRQ_DISABLE(); \ | |
678 | LOCK(A); \ | |
679 | HARDIRQ_ENABLE(); \ | |
680 | UNLOCK(A); | |
681 | ||
682 | /* | |
683 | * Generate 12 testcases: | |
684 | */ | |
685 | #include "locking-selftest-spin.h" | |
686 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin) | |
687 | ||
688 | #include "locking-selftest-wlock.h" | |
689 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock) | |
690 | ||
691 | #include "locking-selftest-rlock.h" | |
692 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock) | |
693 | ||
694 | #undef E1 | |
695 | #undef E2 | |
696 | ||
697 | /* | |
698 | * Enabling irqs with an irq-safe lock held: | |
699 | */ | |
700 | #define E1() \ | |
701 | \ | |
702 | IRQ_ENTER(); \ | |
703 | LOCK(A); \ | |
704 | UNLOCK(A); \ | |
705 | IRQ_EXIT(); | |
706 | ||
707 | #define E2() \ | |
708 | \ | |
709 | IRQ_DISABLE(); \ | |
710 | LOCK(A); \ | |
711 | IRQ_ENABLE(); \ | |
712 | UNLOCK(A); | |
713 | ||
714 | /* | |
715 | * Generate 24 testcases: | |
716 | */ | |
717 | #include "locking-selftest-spin-hardirq.h" | |
718 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin) | |
719 | ||
720 | #include "locking-selftest-rlock-hardirq.h" | |
721 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock) | |
722 | ||
723 | #include "locking-selftest-wlock-hardirq.h" | |
724 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock) | |
725 | ||
726 | #include "locking-selftest-spin-softirq.h" | |
727 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin) | |
728 | ||
729 | #include "locking-selftest-rlock-softirq.h" | |
730 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock) | |
731 | ||
732 | #include "locking-selftest-wlock-softirq.h" | |
733 | GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock) | |
734 | ||
735 | #undef E1 | |
736 | #undef E2 | |
737 | ||
738 | /* | |
739 | * Acquiring a irq-unsafe lock while holding an irq-safe-lock: | |
740 | */ | |
741 | #define E1() \ | |
742 | \ | |
743 | LOCK(A); \ | |
744 | LOCK(B); \ | |
745 | UNLOCK(B); \ | |
746 | UNLOCK(A); \ | |
747 | ||
748 | #define E2() \ | |
749 | \ | |
750 | LOCK(B); \ | |
751 | UNLOCK(B); | |
752 | ||
753 | #define E3() \ | |
754 | \ | |
755 | IRQ_ENTER(); \ | |
756 | LOCK(A); \ | |
757 | UNLOCK(A); \ | |
758 | IRQ_EXIT(); | |
759 | ||
760 | /* | |
761 | * Generate 36 testcases: | |
762 | */ | |
763 | #include "locking-selftest-spin-hardirq.h" | |
764 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin) | |
765 | ||
766 | #include "locking-selftest-rlock-hardirq.h" | |
767 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock) | |
768 | ||
769 | #include "locking-selftest-wlock-hardirq.h" | |
770 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock) | |
771 | ||
772 | #include "locking-selftest-spin-softirq.h" | |
773 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin) | |
774 | ||
775 | #include "locking-selftest-rlock-softirq.h" | |
776 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock) | |
777 | ||
778 | #include "locking-selftest-wlock-softirq.h" | |
779 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock) | |
780 | ||
781 | #undef E1 | |
782 | #undef E2 | |
783 | #undef E3 | |
784 | ||
785 | /* | |
786 | * If a lock turns into softirq-safe, but earlier it took | |
787 | * a softirq-unsafe lock: | |
788 | */ | |
789 | ||
790 | #define E1() \ | |
791 | IRQ_DISABLE(); \ | |
792 | LOCK(A); \ | |
793 | LOCK(B); \ | |
794 | UNLOCK(B); \ | |
795 | UNLOCK(A); \ | |
796 | IRQ_ENABLE(); | |
797 | ||
798 | #define E2() \ | |
799 | LOCK(B); \ | |
800 | UNLOCK(B); | |
801 | ||
802 | #define E3() \ | |
803 | IRQ_ENTER(); \ | |
804 | LOCK(A); \ | |
805 | UNLOCK(A); \ | |
806 | IRQ_EXIT(); | |
807 | ||
808 | /* | |
809 | * Generate 36 testcases: | |
810 | */ | |
811 | #include "locking-selftest-spin-hardirq.h" | |
812 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin) | |
813 | ||
814 | #include "locking-selftest-rlock-hardirq.h" | |
815 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock) | |
816 | ||
817 | #include "locking-selftest-wlock-hardirq.h" | |
818 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock) | |
819 | ||
820 | #include "locking-selftest-spin-softirq.h" | |
821 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin) | |
822 | ||
823 | #include "locking-selftest-rlock-softirq.h" | |
824 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock) | |
825 | ||
826 | #include "locking-selftest-wlock-softirq.h" | |
827 | GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock) | |
828 | ||
829 | #undef E1 | |
830 | #undef E2 | |
831 | #undef E3 | |
832 | ||
833 | /* | |
834 | * read-lock / write-lock irq inversion. | |
835 | * | |
836 | * Deadlock scenario: | |
837 | * | |
838 | * CPU#1 is at #1, i.e. it has write-locked A, but has not | |
839 | * taken B yet. | |
840 | * | |
841 | * CPU#2 is at #2, i.e. it has locked B. | |
842 | * | |
843 | * Hardirq hits CPU#2 at point #2 and is trying to read-lock A. | |
844 | * | |
845 | * The deadlock occurs because CPU#1 will spin on B, and CPU#2 | |
846 | * will spin on A. | |
847 | */ | |
848 | ||
849 | #define E1() \ | |
850 | \ | |
851 | IRQ_DISABLE(); \ | |
852 | WL(A); \ | |
853 | LOCK(B); \ | |
854 | UNLOCK(B); \ | |
855 | WU(A); \ | |
856 | IRQ_ENABLE(); | |
857 | ||
858 | #define E2() \ | |
859 | \ | |
860 | LOCK(B); \ | |
861 | UNLOCK(B); | |
862 | ||
863 | #define E3() \ | |
864 | \ | |
865 | IRQ_ENTER(); \ | |
866 | RL(A); \ | |
867 | RU(A); \ | |
868 | IRQ_EXIT(); | |
869 | ||
870 | /* | |
871 | * Generate 36 testcases: | |
872 | */ | |
873 | #include "locking-selftest-spin-hardirq.h" | |
874 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin) | |
875 | ||
876 | #include "locking-selftest-rlock-hardirq.h" | |
877 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock) | |
878 | ||
879 | #include "locking-selftest-wlock-hardirq.h" | |
880 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock) | |
881 | ||
882 | #include "locking-selftest-spin-softirq.h" | |
883 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin) | |
884 | ||
885 | #include "locking-selftest-rlock-softirq.h" | |
886 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock) | |
887 | ||
888 | #include "locking-selftest-wlock-softirq.h" | |
889 | GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock) | |
890 | ||
891 | #undef E1 | |
892 | #undef E2 | |
893 | #undef E3 | |
894 | ||
895 | /* | |
896 | * read-lock / write-lock recursion that is actually safe. | |
897 | */ | |
898 | ||
899 | #define E1() \ | |
900 | \ | |
901 | IRQ_DISABLE(); \ | |
902 | WL(A); \ | |
903 | WU(A); \ | |
904 | IRQ_ENABLE(); | |
905 | ||
906 | #define E2() \ | |
907 | \ | |
908 | RL(A); \ | |
909 | RU(A); \ | |
910 | ||
911 | #define E3() \ | |
912 | \ | |
913 | IRQ_ENTER(); \ | |
914 | RL(A); \ | |
915 | L(B); \ | |
916 | U(B); \ | |
917 | RU(A); \ | |
918 | IRQ_EXIT(); | |
919 | ||
920 | /* | |
921 | * Generate 12 testcases: | |
922 | */ | |
923 | #include "locking-selftest-hardirq.h" | |
924 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard) | |
925 | ||
926 | #include "locking-selftest-softirq.h" | |
927 | GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft) | |
928 | ||
929 | #undef E1 | |
930 | #undef E2 | |
931 | #undef E3 | |
932 | ||
933 | /* | |
934 | * read-lock / write-lock recursion that is unsafe. | |
935 | */ | |
936 | ||
937 | #define E1() \ | |
938 | \ | |
939 | IRQ_DISABLE(); \ | |
940 | L(B); \ | |
941 | WL(A); \ | |
942 | WU(A); \ | |
943 | U(B); \ | |
944 | IRQ_ENABLE(); | |
945 | ||
946 | #define E2() \ | |
947 | \ | |
948 | RL(A); \ | |
949 | RU(A); \ | |
950 | ||
951 | #define E3() \ | |
952 | \ | |
953 | IRQ_ENTER(); \ | |
954 | L(B); \ | |
955 | U(B); \ | |
956 | IRQ_EXIT(); | |
957 | ||
958 | /* | |
959 | * Generate 12 testcases: | |
960 | */ | |
961 | #include "locking-selftest-hardirq.h" | |
962 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard) | |
963 | ||
964 | #include "locking-selftest-softirq.h" | |
965 | // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft) | |
966 | ||
cae2ed9a IM |
967 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
968 | # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) | |
969 | # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) | |
970 | # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) | |
971 | # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) | |
1de99445 | 972 | # define I_WW(x) lockdep_reset_lock(&x.dep_map) |
018956d6 PZ |
973 | #ifdef CONFIG_RT_MUTEXES |
974 | # define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map) | |
975 | #endif | |
cae2ed9a IM |
976 | #else |
977 | # define I_SPINLOCK(x) | |
978 | # define I_RWLOCK(x) | |
979 | # define I_MUTEX(x) | |
980 | # define I_RWSEM(x) | |
1de99445 | 981 | # define I_WW(x) |
cae2ed9a IM |
982 | #endif |
983 | ||
018956d6 PZ |
984 | #ifndef I_RTMUTEX |
985 | # define I_RTMUTEX(x) | |
986 | #endif | |
987 | ||
988 | #ifdef CONFIG_RT_MUTEXES | |
989 | #define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x) | |
990 | #else | |
991 | #define I2_RTMUTEX(x) | |
992 | #endif | |
993 | ||
cae2ed9a IM |
994 | #define I1(x) \ |
995 | do { \ | |
996 | I_SPINLOCK(x); \ | |
997 | I_RWLOCK(x); \ | |
998 | I_MUTEX(x); \ | |
999 | I_RWSEM(x); \ | |
018956d6 | 1000 | I_RTMUTEX(x); \ |
cae2ed9a IM |
1001 | } while (0) |
1002 | ||
1003 | #define I2(x) \ | |
1004 | do { \ | |
9fb1b90c | 1005 | raw_spin_lock_init(&lock_##x); \ |
cae2ed9a IM |
1006 | rwlock_init(&rwlock_##x); \ |
1007 | mutex_init(&mutex_##x); \ | |
1008 | init_rwsem(&rwsem_##x); \ | |
018956d6 | 1009 | I2_RTMUTEX(x); \ |
cae2ed9a IM |
1010 | } while (0) |
1011 | ||
1012 | static void reset_locks(void) | |
1013 | { | |
1014 | local_irq_disable(); | |
1de99445 ML |
1015 | lockdep_free_key_range(&ww_lockdep.acquire_key, 1); |
1016 | lockdep_free_key_range(&ww_lockdep.mutex_key, 1); | |
1017 | ||
cae2ed9a IM |
1018 | I1(A); I1(B); I1(C); I1(D); |
1019 | I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); | |
f3cf139e | 1020 | I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
cae2ed9a IM |
1021 | lockdep_reset(); |
1022 | I2(A); I2(B); I2(C); I2(D); | |
1023 | init_shared_classes(); | |
1de99445 | 1024 | |
f3cf139e | 1025 | ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
1de99445 ML |
1026 | memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2)); |
1027 | memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key)); | |
1028 | memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key)); | |
cae2ed9a IM |
1029 | local_irq_enable(); |
1030 | } | |
1031 | ||
1032 | #undef I | |
1033 | ||
1034 | static int testcase_total; | |
1035 | static int testcase_successes; | |
1036 | static int expected_testcase_failures; | |
1037 | static int unexpected_testcase_failures; | |
1038 | ||
1039 | static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) | |
1040 | { | |
1041 | unsigned long saved_preempt_count = preempt_count(); | |
cae2ed9a IM |
1042 | |
1043 | WARN_ON(irqs_disabled()); | |
1044 | ||
1045 | testcase_fn(); | |
1046 | /* | |
1047 | * Filter out expected failures: | |
1048 | */ | |
1049 | #ifndef CONFIG_PROVE_LOCKING | |
166989e3 | 1050 | if (expected == FAILURE && debug_locks) { |
1de99445 | 1051 | expected_testcase_failures++; |
25139409 | 1052 | pr_cont("failed|"); |
166989e3 ML |
1053 | } |
1054 | else | |
1055 | #endif | |
1056 | if (debug_locks != expected) { | |
1de99445 | 1057 | unexpected_testcase_failures++; |
25139409 | 1058 | pr_cont("FAILED|"); |
1de99445 ML |
1059 | |
1060 | dump_stack(); | |
cae2ed9a IM |
1061 | } else { |
1062 | testcase_successes++; | |
25139409 | 1063 | pr_cont(" ok |"); |
cae2ed9a IM |
1064 | } |
1065 | testcase_total++; | |
1066 | ||
1067 | if (debug_locks_verbose) | |
25139409 | 1068 | pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n", |
cae2ed9a IM |
1069 | lockclass_mask, debug_locks, expected); |
1070 | /* | |
1071 | * Some tests (e.g. double-unlock) might corrupt the preemption | |
1072 | * count, so restore it: | |
1073 | */ | |
4a2b4b22 | 1074 | preempt_count_set(saved_preempt_count); |
cae2ed9a IM |
1075 | #ifdef CONFIG_TRACE_IRQFLAGS |
1076 | if (softirq_count()) | |
1077 | current->softirqs_enabled = 0; | |
1078 | else | |
1079 | current->softirqs_enabled = 1; | |
1080 | #endif | |
1081 | ||
1082 | reset_locks(); | |
1083 | } | |
1084 | ||
018956d6 PZ |
1085 | #ifdef CONFIG_RT_MUTEXES |
1086 | #define dotest_rt(fn, e, m) dotest((fn), (e), (m)) | |
1087 | #else | |
1088 | #define dotest_rt(fn, e, m) | |
1089 | #endif | |
1090 | ||
cae2ed9a IM |
1091 | static inline void print_testname(const char *testname) |
1092 | { | |
1093 | printk("%33s:", testname); | |
1094 | } | |
1095 | ||
1096 | #define DO_TESTCASE_1(desc, name, nr) \ | |
1097 | print_testname(desc"/"#nr); \ | |
1098 | dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1099 | pr_cont("\n"); |
cae2ed9a IM |
1100 | |
1101 | #define DO_TESTCASE_1B(desc, name, nr) \ | |
1102 | print_testname(desc"/"#nr); \ | |
1103 | dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
25139409 | 1104 | pr_cont("\n"); |
cae2ed9a IM |
1105 | |
1106 | #define DO_TESTCASE_3(desc, name, nr) \ | |
1107 | print_testname(desc"/"#nr); \ | |
1108 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ | |
1109 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1110 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1111 | pr_cont("\n"); |
cae2ed9a IM |
1112 | |
1113 | #define DO_TESTCASE_3RW(desc, name, nr) \ | |
1114 | print_testname(desc"/"#nr); \ | |
1115 | dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ | |
1116 | dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ | |
1117 | dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ | |
25139409 | 1118 | pr_cont("\n"); |
cae2ed9a IM |
1119 | |
1120 | #define DO_TESTCASE_6(desc, name) \ | |
1121 | print_testname(desc); \ | |
1122 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1123 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1124 | dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1125 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1126 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1127 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1128 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1129 | pr_cont("\n"); |
cae2ed9a IM |
1130 | |
1131 | #define DO_TESTCASE_6_SUCCESS(desc, name) \ | |
1132 | print_testname(desc); \ | |
1133 | dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ | |
1134 | dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1135 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1136 | dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ | |
1137 | dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
1138 | dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ | |
018956d6 | 1139 | dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \ |
25139409 | 1140 | pr_cont("\n"); |
cae2ed9a IM |
1141 | |
1142 | /* | |
1143 | * 'read' variant: rlocks must not trigger. | |
1144 | */ | |
1145 | #define DO_TESTCASE_6R(desc, name) \ | |
1146 | print_testname(desc); \ | |
1147 | dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ | |
1148 | dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ | |
1149 | dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ | |
1150 | dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ | |
1151 | dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ | |
1152 | dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ | |
018956d6 | 1153 | dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
25139409 | 1154 | pr_cont("\n"); |
cae2ed9a IM |
1155 | |
1156 | #define DO_TESTCASE_2I(desc, name, nr) \ | |
1157 | DO_TESTCASE_1("hard-"desc, name##_hard, nr); \ | |
1158 | DO_TESTCASE_1("soft-"desc, name##_soft, nr); | |
1159 | ||
1160 | #define DO_TESTCASE_2IB(desc, name, nr) \ | |
1161 | DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \ | |
1162 | DO_TESTCASE_1B("soft-"desc, name##_soft, nr); | |
1163 | ||
1164 | #define DO_TESTCASE_6I(desc, name, nr) \ | |
1165 | DO_TESTCASE_3("hard-"desc, name##_hard, nr); \ | |
1166 | DO_TESTCASE_3("soft-"desc, name##_soft, nr); | |
1167 | ||
1168 | #define DO_TESTCASE_6IRW(desc, name, nr) \ | |
1169 | DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \ | |
1170 | DO_TESTCASE_3RW("soft-"desc, name##_soft, nr); | |
1171 | ||
1172 | #define DO_TESTCASE_2x3(desc, name) \ | |
1173 | DO_TESTCASE_3(desc, name, 12); \ | |
1174 | DO_TESTCASE_3(desc, name, 21); | |
1175 | ||
1176 | #define DO_TESTCASE_2x6(desc, name) \ | |
1177 | DO_TESTCASE_6I(desc, name, 12); \ | |
1178 | DO_TESTCASE_6I(desc, name, 21); | |
1179 | ||
1180 | #define DO_TESTCASE_6x2(desc, name) \ | |
1181 | DO_TESTCASE_2I(desc, name, 123); \ | |
1182 | DO_TESTCASE_2I(desc, name, 132); \ | |
1183 | DO_TESTCASE_2I(desc, name, 213); \ | |
1184 | DO_TESTCASE_2I(desc, name, 231); \ | |
1185 | DO_TESTCASE_2I(desc, name, 312); \ | |
1186 | DO_TESTCASE_2I(desc, name, 321); | |
1187 | ||
1188 | #define DO_TESTCASE_6x2B(desc, name) \ | |
1189 | DO_TESTCASE_2IB(desc, name, 123); \ | |
1190 | DO_TESTCASE_2IB(desc, name, 132); \ | |
1191 | DO_TESTCASE_2IB(desc, name, 213); \ | |
1192 | DO_TESTCASE_2IB(desc, name, 231); \ | |
1193 | DO_TESTCASE_2IB(desc, name, 312); \ | |
1194 | DO_TESTCASE_2IB(desc, name, 321); | |
1195 | ||
1196 | #define DO_TESTCASE_6x6(desc, name) \ | |
1197 | DO_TESTCASE_6I(desc, name, 123); \ | |
1198 | DO_TESTCASE_6I(desc, name, 132); \ | |
1199 | DO_TESTCASE_6I(desc, name, 213); \ | |
1200 | DO_TESTCASE_6I(desc, name, 231); \ | |
1201 | DO_TESTCASE_6I(desc, name, 312); \ | |
1202 | DO_TESTCASE_6I(desc, name, 321); | |
1203 | ||
1204 | #define DO_TESTCASE_6x6RW(desc, name) \ | |
1205 | DO_TESTCASE_6IRW(desc, name, 123); \ | |
1206 | DO_TESTCASE_6IRW(desc, name, 132); \ | |
1207 | DO_TESTCASE_6IRW(desc, name, 213); \ | |
1208 | DO_TESTCASE_6IRW(desc, name, 231); \ | |
1209 | DO_TESTCASE_6IRW(desc, name, 312); \ | |
1210 | DO_TESTCASE_6IRW(desc, name, 321); | |
1211 | ||
1de99445 ML |
1212 | static void ww_test_fail_acquire(void) |
1213 | { | |
1214 | int ret; | |
1215 | ||
1216 | WWAI(&t); | |
1217 | t.stamp++; | |
1218 | ||
1219 | ret = WWL(&o, &t); | |
1220 | ||
1221 | if (WARN_ON(!o.ctx) || | |
1222 | WARN_ON(ret)) | |
1223 | return; | |
1224 | ||
1225 | /* No lockdep test, pure API */ | |
1226 | ret = WWL(&o, &t); | |
1227 | WARN_ON(ret != -EALREADY); | |
1228 | ||
1229 | ret = WWT(&o); | |
1230 | WARN_ON(ret); | |
1231 | ||
1232 | t2 = t; | |
1233 | t2.stamp++; | |
1234 | ret = WWL(&o, &t2); | |
1235 | WARN_ON(ret != -EDEADLK); | |
1236 | WWU(&o); | |
1237 | ||
1238 | if (WWT(&o)) | |
1239 | WWU(&o); | |
1240 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
1241 | else | |
1242 | DEBUG_LOCKS_WARN_ON(1); | |
1243 | #endif | |
1244 | } | |
1245 | ||
2fe3d4b1 ML |
1246 | static void ww_test_normal(void) |
1247 | { | |
1248 | int ret; | |
1249 | ||
1250 | WWAI(&t); | |
1251 | ||
1252 | /* | |
1253 | * None of the ww_mutex codepaths should be taken in the 'normal' | |
1254 | * mutex calls. The easiest way to verify this is by using the | |
1255 | * normal mutex calls, and making sure o.ctx is unmodified. | |
1256 | */ | |
1257 | ||
1258 | /* mutex_lock (and indirectly, mutex_lock_nested) */ | |
1259 | o.ctx = (void *)~0UL; | |
1260 | mutex_lock(&o.base); | |
1261 | mutex_unlock(&o.base); | |
1262 | WARN_ON(o.ctx != (void *)~0UL); | |
1263 | ||
1264 | /* mutex_lock_interruptible (and *_nested) */ | |
1265 | o.ctx = (void *)~0UL; | |
1266 | ret = mutex_lock_interruptible(&o.base); | |
1267 | if (!ret) | |
1268 | mutex_unlock(&o.base); | |
1269 | else | |
1270 | WARN_ON(1); | |
1271 | WARN_ON(o.ctx != (void *)~0UL); | |
1272 | ||
1273 | /* mutex_lock_killable (and *_nested) */ | |
1274 | o.ctx = (void *)~0UL; | |
1275 | ret = mutex_lock_killable(&o.base); | |
1276 | if (!ret) | |
1277 | mutex_unlock(&o.base); | |
1278 | else | |
1279 | WARN_ON(1); | |
1280 | WARN_ON(o.ctx != (void *)~0UL); | |
1281 | ||
1282 | /* trylock, succeeding */ | |
1283 | o.ctx = (void *)~0UL; | |
1284 | ret = mutex_trylock(&o.base); | |
1285 | WARN_ON(!ret); | |
1286 | if (ret) | |
1287 | mutex_unlock(&o.base); | |
1288 | else | |
1289 | WARN_ON(1); | |
1290 | WARN_ON(o.ctx != (void *)~0UL); | |
1291 | ||
1292 | /* trylock, failing */ | |
1293 | o.ctx = (void *)~0UL; | |
1294 | mutex_lock(&o.base); | |
1295 | ret = mutex_trylock(&o.base); | |
1296 | WARN_ON(ret); | |
1297 | mutex_unlock(&o.base); | |
1298 | WARN_ON(o.ctx != (void *)~0UL); | |
1299 | ||
1300 | /* nest_lock */ | |
1301 | o.ctx = (void *)~0UL; | |
1302 | mutex_lock_nest_lock(&o.base, &t); | |
1303 | mutex_unlock(&o.base); | |
1304 | WARN_ON(o.ctx != (void *)~0UL); | |
1305 | } | |
1306 | ||
1de99445 ML |
1307 | static void ww_test_two_contexts(void) |
1308 | { | |
1309 | WWAI(&t); | |
1310 | WWAI(&t2); | |
1311 | } | |
1312 | ||
1313 | static void ww_test_diff_class(void) | |
1314 | { | |
1315 | WWAI(&t); | |
1316 | #ifdef CONFIG_DEBUG_MUTEXES | |
1317 | t.ww_class = NULL; | |
1318 | #endif | |
1319 | WWL(&o, &t); | |
1320 | } | |
1321 | ||
1322 | static void ww_test_context_done_twice(void) | |
1323 | { | |
1324 | WWAI(&t); | |
1325 | WWAD(&t); | |
1326 | WWAD(&t); | |
1327 | WWAF(&t); | |
1328 | } | |
1329 | ||
1330 | static void ww_test_context_unlock_twice(void) | |
1331 | { | |
1332 | WWAI(&t); | |
1333 | WWAD(&t); | |
1334 | WWAF(&t); | |
1335 | WWAF(&t); | |
1336 | } | |
1337 | ||
1338 | static void ww_test_context_fini_early(void) | |
1339 | { | |
1340 | WWAI(&t); | |
1341 | WWL(&o, &t); | |
1342 | WWAD(&t); | |
1343 | WWAF(&t); | |
1344 | } | |
1345 | ||
1346 | static void ww_test_context_lock_after_done(void) | |
1347 | { | |
1348 | WWAI(&t); | |
1349 | WWAD(&t); | |
1350 | WWL(&o, &t); | |
1351 | } | |
1352 | ||
1353 | static void ww_test_object_unlock_twice(void) | |
1354 | { | |
1355 | WWL1(&o); | |
1356 | WWU(&o); | |
1357 | WWU(&o); | |
1358 | } | |
1359 | ||
1360 | static void ww_test_object_lock_unbalanced(void) | |
1361 | { | |
1362 | WWAI(&t); | |
1363 | WWL(&o, &t); | |
1364 | t.acquired = 0; | |
1365 | WWU(&o); | |
1366 | WWAF(&t); | |
1367 | } | |
1368 | ||
1369 | static void ww_test_object_lock_stale_context(void) | |
1370 | { | |
1371 | WWAI(&t); | |
1372 | o.ctx = &t2; | |
1373 | WWL(&o, &t); | |
1374 | } | |
1375 | ||
f3cf139e ML |
1376 | static void ww_test_edeadlk_normal(void) |
1377 | { | |
1378 | int ret; | |
1379 | ||
1380 | mutex_lock(&o2.base); | |
1381 | o2.ctx = &t2; | |
1382 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1383 | ||
1384 | WWAI(&t); | |
1385 | t2 = t; | |
1386 | t2.stamp--; | |
1387 | ||
1388 | ret = WWL(&o, &t); | |
1389 | WARN_ON(ret); | |
1390 | ||
1391 | ret = WWL(&o2, &t); | |
1392 | WARN_ON(ret != -EDEADLK); | |
1393 | ||
1394 | o2.ctx = NULL; | |
1395 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1396 | mutex_unlock(&o2.base); | |
1397 | WWU(&o); | |
1398 | ||
1399 | WWL(&o2, &t); | |
1400 | } | |
1401 | ||
1402 | static void ww_test_edeadlk_normal_slow(void) | |
1403 | { | |
1404 | int ret; | |
1405 | ||
1406 | mutex_lock(&o2.base); | |
1407 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1408 | o2.ctx = &t2; | |
1409 | ||
1410 | WWAI(&t); | |
1411 | t2 = t; | |
1412 | t2.stamp--; | |
1413 | ||
1414 | ret = WWL(&o, &t); | |
1415 | WARN_ON(ret); | |
1416 | ||
1417 | ret = WWL(&o2, &t); | |
1418 | WARN_ON(ret != -EDEADLK); | |
1419 | ||
1420 | o2.ctx = NULL; | |
1421 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1422 | mutex_unlock(&o2.base); | |
1423 | WWU(&o); | |
1424 | ||
1425 | ww_mutex_lock_slow(&o2, &t); | |
1426 | } | |
1427 | ||
1428 | static void ww_test_edeadlk_no_unlock(void) | |
1429 | { | |
1430 | int ret; | |
1431 | ||
1432 | mutex_lock(&o2.base); | |
1433 | o2.ctx = &t2; | |
1434 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1435 | ||
1436 | WWAI(&t); | |
1437 | t2 = t; | |
1438 | t2.stamp--; | |
1439 | ||
1440 | ret = WWL(&o, &t); | |
1441 | WARN_ON(ret); | |
1442 | ||
1443 | ret = WWL(&o2, &t); | |
1444 | WARN_ON(ret != -EDEADLK); | |
1445 | ||
1446 | o2.ctx = NULL; | |
1447 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1448 | mutex_unlock(&o2.base); | |
1449 | ||
1450 | WWL(&o2, &t); | |
1451 | } | |
1452 | ||
1453 | static void ww_test_edeadlk_no_unlock_slow(void) | |
1454 | { | |
1455 | int ret; | |
1456 | ||
1457 | mutex_lock(&o2.base); | |
1458 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1459 | o2.ctx = &t2; | |
1460 | ||
1461 | WWAI(&t); | |
1462 | t2 = t; | |
1463 | t2.stamp--; | |
1464 | ||
1465 | ret = WWL(&o, &t); | |
1466 | WARN_ON(ret); | |
1467 | ||
1468 | ret = WWL(&o2, &t); | |
1469 | WARN_ON(ret != -EDEADLK); | |
1470 | ||
1471 | o2.ctx = NULL; | |
1472 | mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_); | |
1473 | mutex_unlock(&o2.base); | |
1474 | ||
1475 | ww_mutex_lock_slow(&o2, &t); | |
1476 | } | |
1477 | ||
1478 | static void ww_test_edeadlk_acquire_more(void) | |
1479 | { | |
1480 | int ret; | |
1481 | ||
1482 | mutex_lock(&o2.base); | |
1483 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1484 | o2.ctx = &t2; | |
1485 | ||
1486 | WWAI(&t); | |
1487 | t2 = t; | |
1488 | t2.stamp--; | |
1489 | ||
1490 | ret = WWL(&o, &t); | |
1491 | WARN_ON(ret); | |
1492 | ||
1493 | ret = WWL(&o2, &t); | |
1494 | WARN_ON(ret != -EDEADLK); | |
1495 | ||
1496 | ret = WWL(&o3, &t); | |
1497 | } | |
1498 | ||
1499 | static void ww_test_edeadlk_acquire_more_slow(void) | |
1500 | { | |
1501 | int ret; | |
1502 | ||
1503 | mutex_lock(&o2.base); | |
1504 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1505 | o2.ctx = &t2; | |
1506 | ||
1507 | WWAI(&t); | |
1508 | t2 = t; | |
1509 | t2.stamp--; | |
1510 | ||
1511 | ret = WWL(&o, &t); | |
1512 | WARN_ON(ret); | |
1513 | ||
1514 | ret = WWL(&o2, &t); | |
1515 | WARN_ON(ret != -EDEADLK); | |
1516 | ||
1517 | ww_mutex_lock_slow(&o3, &t); | |
1518 | } | |
1519 | ||
1520 | static void ww_test_edeadlk_acquire_more_edeadlk(void) | |
1521 | { | |
1522 | int ret; | |
1523 | ||
1524 | mutex_lock(&o2.base); | |
1525 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1526 | o2.ctx = &t2; | |
1527 | ||
1528 | mutex_lock(&o3.base); | |
1529 | mutex_release(&o3.base.dep_map, 1, _THIS_IP_); | |
1530 | o3.ctx = &t2; | |
1531 | ||
1532 | WWAI(&t); | |
1533 | t2 = t; | |
1534 | t2.stamp--; | |
1535 | ||
1536 | ret = WWL(&o, &t); | |
1537 | WARN_ON(ret); | |
1538 | ||
1539 | ret = WWL(&o2, &t); | |
1540 | WARN_ON(ret != -EDEADLK); | |
1541 | ||
1542 | ret = WWL(&o3, &t); | |
1543 | WARN_ON(ret != -EDEADLK); | |
1544 | } | |
1545 | ||
1546 | static void ww_test_edeadlk_acquire_more_edeadlk_slow(void) | |
1547 | { | |
1548 | int ret; | |
1549 | ||
1550 | mutex_lock(&o2.base); | |
1551 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1552 | o2.ctx = &t2; | |
1553 | ||
1554 | mutex_lock(&o3.base); | |
1555 | mutex_release(&o3.base.dep_map, 1, _THIS_IP_); | |
1556 | o3.ctx = &t2; | |
1557 | ||
1558 | WWAI(&t); | |
1559 | t2 = t; | |
1560 | t2.stamp--; | |
1561 | ||
1562 | ret = WWL(&o, &t); | |
1563 | WARN_ON(ret); | |
1564 | ||
1565 | ret = WWL(&o2, &t); | |
1566 | WARN_ON(ret != -EDEADLK); | |
1567 | ||
1568 | ww_mutex_lock_slow(&o3, &t); | |
1569 | } | |
1570 | ||
1571 | static void ww_test_edeadlk_acquire_wrong(void) | |
1572 | { | |
1573 | int ret; | |
1574 | ||
1575 | mutex_lock(&o2.base); | |
1576 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1577 | o2.ctx = &t2; | |
1578 | ||
1579 | WWAI(&t); | |
1580 | t2 = t; | |
1581 | t2.stamp--; | |
1582 | ||
1583 | ret = WWL(&o, &t); | |
1584 | WARN_ON(ret); | |
1585 | ||
1586 | ret = WWL(&o2, &t); | |
1587 | WARN_ON(ret != -EDEADLK); | |
1588 | if (!ret) | |
1589 | WWU(&o2); | |
1590 | ||
1591 | WWU(&o); | |
1592 | ||
1593 | ret = WWL(&o3, &t); | |
1594 | } | |
1595 | ||
1596 | static void ww_test_edeadlk_acquire_wrong_slow(void) | |
1597 | { | |
1598 | int ret; | |
1599 | ||
1600 | mutex_lock(&o2.base); | |
1601 | mutex_release(&o2.base.dep_map, 1, _THIS_IP_); | |
1602 | o2.ctx = &t2; | |
1603 | ||
1604 | WWAI(&t); | |
1605 | t2 = t; | |
1606 | t2.stamp--; | |
1607 | ||
1608 | ret = WWL(&o, &t); | |
1609 | WARN_ON(ret); | |
1610 | ||
1611 | ret = WWL(&o2, &t); | |
1612 | WARN_ON(ret != -EDEADLK); | |
1613 | if (!ret) | |
1614 | WWU(&o2); | |
1615 | ||
1616 | WWU(&o); | |
1617 | ||
1618 | ww_mutex_lock_slow(&o3, &t); | |
1619 | } | |
1620 | ||
1de99445 ML |
1621 | static void ww_test_spin_nest_unlocked(void) |
1622 | { | |
1623 | raw_spin_lock_nest_lock(&lock_A, &o.base); | |
1624 | U(A); | |
1625 | } | |
1626 | ||
1627 | static void ww_test_unneeded_slow(void) | |
1628 | { | |
1629 | WWAI(&t); | |
1630 | ||
1631 | ww_mutex_lock_slow(&o, &t); | |
1632 | } | |
1633 | ||
1634 | static void ww_test_context_block(void) | |
1635 | { | |
1636 | int ret; | |
1637 | ||
1638 | WWAI(&t); | |
1639 | ||
1640 | ret = WWL(&o, &t); | |
1641 | WARN_ON(ret); | |
1642 | WWL1(&o2); | |
1643 | } | |
1644 | ||
1645 | static void ww_test_context_try(void) | |
1646 | { | |
1647 | int ret; | |
1648 | ||
1649 | WWAI(&t); | |
1650 | ||
1651 | ret = WWL(&o, &t); | |
1652 | WARN_ON(ret); | |
1653 | ||
1654 | ret = WWT(&o2); | |
1655 | WARN_ON(!ret); | |
1656 | WWU(&o2); | |
1657 | WWU(&o); | |
1658 | } | |
1659 | ||
1660 | static void ww_test_context_context(void) | |
1661 | { | |
1662 | int ret; | |
1663 | ||
1664 | WWAI(&t); | |
1665 | ||
1666 | ret = WWL(&o, &t); | |
1667 | WARN_ON(ret); | |
1668 | ||
1669 | ret = WWL(&o2, &t); | |
1670 | WARN_ON(ret); | |
1671 | ||
1672 | WWU(&o2); | |
1673 | WWU(&o); | |
1674 | } | |
1675 | ||
1676 | static void ww_test_try_block(void) | |
1677 | { | |
1678 | bool ret; | |
1679 | ||
1680 | ret = WWT(&o); | |
1681 | WARN_ON(!ret); | |
1682 | ||
1683 | WWL1(&o2); | |
1684 | WWU(&o2); | |
1685 | WWU(&o); | |
1686 | } | |
1687 | ||
1688 | static void ww_test_try_try(void) | |
1689 | { | |
1690 | bool ret; | |
1691 | ||
1692 | ret = WWT(&o); | |
1693 | WARN_ON(!ret); | |
1694 | ret = WWT(&o2); | |
1695 | WARN_ON(!ret); | |
1696 | WWU(&o2); | |
1697 | WWU(&o); | |
1698 | } | |
1699 | ||
1700 | static void ww_test_try_context(void) | |
1701 | { | |
1702 | int ret; | |
1703 | ||
1704 | ret = WWT(&o); | |
1705 | WARN_ON(!ret); | |
1706 | ||
1707 | WWAI(&t); | |
1708 | ||
1709 | ret = WWL(&o2, &t); | |
1710 | WARN_ON(ret); | |
1711 | } | |
1712 | ||
1713 | static void ww_test_block_block(void) | |
1714 | { | |
1715 | WWL1(&o); | |
1716 | WWL1(&o2); | |
1717 | } | |
1718 | ||
1719 | static void ww_test_block_try(void) | |
1720 | { | |
1721 | bool ret; | |
1722 | ||
1723 | WWL1(&o); | |
1724 | ret = WWT(&o2); | |
1725 | WARN_ON(!ret); | |
1726 | } | |
1727 | ||
1728 | static void ww_test_block_context(void) | |
1729 | { | |
1730 | int ret; | |
1731 | ||
1732 | WWL1(&o); | |
1733 | WWAI(&t); | |
1734 | ||
1735 | ret = WWL(&o2, &t); | |
1736 | WARN_ON(ret); | |
1737 | } | |
1738 | ||
1739 | static void ww_test_spin_block(void) | |
1740 | { | |
1741 | L(A); | |
1742 | U(A); | |
1743 | ||
1744 | WWL1(&o); | |
1745 | L(A); | |
1746 | U(A); | |
1747 | WWU(&o); | |
1748 | ||
1749 | L(A); | |
1750 | WWL1(&o); | |
1751 | WWU(&o); | |
1752 | U(A); | |
1753 | } | |
1754 | ||
1755 | static void ww_test_spin_try(void) | |
1756 | { | |
1757 | bool ret; | |
1758 | ||
1759 | L(A); | |
1760 | U(A); | |
1761 | ||
1762 | ret = WWT(&o); | |
1763 | WARN_ON(!ret); | |
1764 | L(A); | |
1765 | U(A); | |
1766 | WWU(&o); | |
1767 | ||
1768 | L(A); | |
1769 | ret = WWT(&o); | |
1770 | WARN_ON(!ret); | |
1771 | WWU(&o); | |
1772 | U(A); | |
1773 | } | |
1774 | ||
1775 | static void ww_test_spin_context(void) | |
1776 | { | |
1777 | int ret; | |
1778 | ||
1779 | L(A); | |
1780 | U(A); | |
1781 | ||
1782 | WWAI(&t); | |
1783 | ||
1784 | ret = WWL(&o, &t); | |
1785 | WARN_ON(ret); | |
1786 | L(A); | |
1787 | U(A); | |
1788 | WWU(&o); | |
1789 | ||
1790 | L(A); | |
1791 | ret = WWL(&o, &t); | |
1792 | WARN_ON(ret); | |
1793 | WWU(&o); | |
1794 | U(A); | |
1795 | } | |
1796 | ||
1797 | static void ww_tests(void) | |
1798 | { | |
1799 | printk(" --------------------------------------------------------------------------\n"); | |
1800 | printk(" | Wound/wait tests |\n"); | |
1801 | printk(" ---------------------\n"); | |
1802 | ||
1803 | print_testname("ww api failures"); | |
1804 | dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW); | |
2fe3d4b1 | 1805 | dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
1de99445 | 1806 | dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
25139409 | 1807 | pr_cont("\n"); |
1de99445 ML |
1808 | |
1809 | print_testname("ww contexts mixing"); | |
1810 | dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW); | |
1811 | dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW); | |
25139409 | 1812 | pr_cont("\n"); |
1de99445 ML |
1813 | |
1814 | print_testname("finishing ww context"); | |
1815 | dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW); | |
1816 | dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW); | |
1817 | dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW); | |
1818 | dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW); | |
25139409 | 1819 | pr_cont("\n"); |
1de99445 ML |
1820 | |
1821 | print_testname("locking mismatches"); | |
1822 | dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW); | |
1823 | dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW); | |
1824 | dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1825 | pr_cont("\n"); |
1de99445 | 1826 | |
f3cf139e ML |
1827 | print_testname("EDEADLK handling"); |
1828 | dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW); | |
1829 | dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW); | |
1830 | dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW); | |
1831 | dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW); | |
1832 | dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW); | |
1833 | dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW); | |
1834 | dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW); | |
1835 | dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW); | |
1836 | dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW); | |
1837 | dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW); | |
25139409 | 1838 | pr_cont("\n"); |
f3cf139e | 1839 | |
1de99445 ML |
1840 | print_testname("spinlock nest unlocked"); |
1841 | dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW); | |
25139409 | 1842 | pr_cont("\n"); |
1de99445 ML |
1843 | |
1844 | printk(" -----------------------------------------------------\n"); | |
1845 | printk(" |block | try |context|\n"); | |
1846 | printk(" -----------------------------------------------------\n"); | |
1847 | ||
1848 | print_testname("context"); | |
1849 | dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW); | |
1850 | dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW); | |
1851 | dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW); | |
25139409 | 1852 | pr_cont("\n"); |
1de99445 ML |
1853 | |
1854 | print_testname("try"); | |
1855 | dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW); | |
1856 | dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW); | |
1857 | dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1858 | pr_cont("\n"); |
1de99445 ML |
1859 | |
1860 | print_testname("block"); | |
1861 | dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW); | |
1862 | dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW); | |
1863 | dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1864 | pr_cont("\n"); |
1de99445 ML |
1865 | |
1866 | print_testname("spinlock"); | |
1867 | dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW); | |
1868 | dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW); | |
1869 | dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW); | |
25139409 | 1870 | pr_cont("\n"); |
1de99445 | 1871 | } |
cae2ed9a IM |
1872 | |
1873 | void locking_selftest(void) | |
1874 | { | |
1875 | /* | |
1876 | * Got a locking failure before the selftest ran? | |
1877 | */ | |
1878 | if (!debug_locks) { | |
1879 | printk("----------------------------------\n"); | |
1880 | printk("| Locking API testsuite disabled |\n"); | |
1881 | printk("----------------------------------\n"); | |
1882 | return; | |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * Run the testsuite: | |
1887 | */ | |
1888 | printk("------------------------\n"); | |
1889 | printk("| Locking API testsuite:\n"); | |
1890 | printk("----------------------------------------------------------------------------\n"); | |
1891 | printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n"); | |
1892 | printk(" --------------------------------------------------------------------------\n"); | |
1893 | ||
1894 | init_shared_classes(); | |
1895 | debug_locks_silent = !debug_locks_verbose; | |
1896 | ||
6c9076ec | 1897 | DO_TESTCASE_6R("A-A deadlock", AA); |
cae2ed9a IM |
1898 | DO_TESTCASE_6R("A-B-B-A deadlock", ABBA); |
1899 | DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA); | |
1900 | DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC); | |
1901 | DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA); | |
1902 | DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA); | |
1903 | DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA); | |
1904 | DO_TESTCASE_6("double unlock", double_unlock); | |
1905 | DO_TESTCASE_6("initialize held", init_held); | |
cae2ed9a IM |
1906 | |
1907 | printk(" --------------------------------------------------------------------------\n"); | |
1908 | print_testname("recursive read-lock"); | |
25139409 | 1909 | pr_cont(" |"); |
cae2ed9a | 1910 | dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 1911 | pr_cont(" |"); |
cae2ed9a | 1912 | dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 1913 | pr_cont("\n"); |
cae2ed9a IM |
1914 | |
1915 | print_testname("recursive read-lock #2"); | |
25139409 | 1916 | pr_cont(" |"); |
6c9076ec | 1917 | dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
25139409 | 1918 | pr_cont(" |"); |
cae2ed9a | 1919 | dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 1920 | pr_cont("\n"); |
cae2ed9a IM |
1921 | |
1922 | print_testname("mixed read-write-lock"); | |
25139409 | 1923 | pr_cont(" |"); |
cae2ed9a | 1924 | dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 1925 | pr_cont(" |"); |
cae2ed9a | 1926 | dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 1927 | pr_cont("\n"); |
cae2ed9a IM |
1928 | |
1929 | print_testname("mixed write-read-lock"); | |
25139409 | 1930 | pr_cont(" |"); |
cae2ed9a | 1931 | dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); |
25139409 | 1932 | pr_cont(" |"); |
cae2ed9a | 1933 | dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); |
25139409 | 1934 | pr_cont("\n"); |
cae2ed9a IM |
1935 | |
1936 | printk(" --------------------------------------------------------------------------\n"); | |
1937 | ||
1938 | /* | |
1939 | * irq-context testcases: | |
1940 | */ | |
1941 | DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1); | |
1942 | DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A); | |
1943 | DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B); | |
1944 | DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3); | |
1945 | DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4); | |
1946 | DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion); | |
1947 | ||
1948 | DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion); | |
1949 | // DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2); | |
1950 | ||
1de99445 ML |
1951 | ww_tests(); |
1952 | ||
cae2ed9a IM |
1953 | if (unexpected_testcase_failures) { |
1954 | printk("-----------------------------------------------------------------\n"); | |
1955 | debug_locks = 0; | |
1956 | printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", | |
1957 | unexpected_testcase_failures, testcase_total); | |
1958 | printk("-----------------------------------------------------------------\n"); | |
1959 | } else if (expected_testcase_failures && testcase_successes) { | |
1960 | printk("--------------------------------------------------------\n"); | |
1961 | printk("%3d out of %3d testcases failed, as expected. |\n", | |
1962 | expected_testcase_failures, testcase_total); | |
1963 | printk("----------------------------------------------------\n"); | |
1964 | debug_locks = 1; | |
1965 | } else if (expected_testcase_failures && !testcase_successes) { | |
1966 | printk("--------------------------------------------------------\n"); | |
1967 | printk("All %3d testcases failed, as expected. |\n", | |
1968 | expected_testcase_failures); | |
1969 | printk("----------------------------------------\n"); | |
1970 | debug_locks = 1; | |
1971 | } else { | |
1972 | printk("-------------------------------------------------------\n"); | |
1973 | printk("Good, all %3d testcases passed! |\n", | |
1974 | testcase_successes); | |
1975 | printk("---------------------------------\n"); | |
1976 | debug_locks = 1; | |
1977 | } | |
1978 | debug_locks_silent = 0; | |
1979 | } |