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