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marcus.erl |
/*
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* lib/locking-selftest.c
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*
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* Testsuite for various locking APIs: spinlocks, rwlocks,
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* mutexes and rw-semaphores.
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*
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* It is checking both false positives and false negatives.
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*
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* Started by Ingo Molnar:
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*
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* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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*/
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#include <linux/rwsem.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/lockdep.h>
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#include <linux/spinlock.h>
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#include <linux/kallsyms.h>
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#include <linux/interrupt.h>
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#include <linux/debug_locks.h>
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#include <linux/irqflags.h>
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/*
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* Change this to 1 if you want to see the failure printouts:
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*/
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static unsigned int debug_locks_verbose;
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static int __init setup_debug_locks_verbose(char *str)
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{
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get_option(&str, &debug_locks_verbose);
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return 1;
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}
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__setup("debug_locks_verbose=", setup_debug_locks_verbose);
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#define FAILURE 0
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#define SUCCESS 1
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#define LOCKTYPE_SPIN 0x1
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#define LOCKTYPE_RWLOCK 0x2
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#define LOCKTYPE_MUTEX 0x4
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#define LOCKTYPE_RWSEM 0x8
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/*
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* Normal standalone locks, for the circular and irq-context
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* dependency tests:
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*/
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static DEFINE_SPINLOCK(lock_A);
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static DEFINE_SPINLOCK(lock_B);
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static DEFINE_SPINLOCK(lock_C);
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static DEFINE_SPINLOCK(lock_D);
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static DEFINE_RWLOCK(rwlock_A);
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static DEFINE_RWLOCK(rwlock_B);
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static DEFINE_RWLOCK(rwlock_C);
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static DEFINE_RWLOCK(rwlock_D);
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static DEFINE_MUTEX(mutex_A);
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static DEFINE_MUTEX(mutex_B);
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static DEFINE_MUTEX(mutex_C);
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static DEFINE_MUTEX(mutex_D);
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static DECLARE_RWSEM(rwsem_A);
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static DECLARE_RWSEM(rwsem_B);
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static DECLARE_RWSEM(rwsem_C);
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static DECLARE_RWSEM(rwsem_D);
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/*
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* Locks that we initialize dynamically as well so that
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* e.g. X1 and X2 becomes two instances of the same class,
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* but X* and Y* are different classes. We do this so that
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* we do not trigger a real lockup:
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*/
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static DEFINE_SPINLOCK(lock_X1);
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static DEFINE_SPINLOCK(lock_X2);
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static DEFINE_SPINLOCK(lock_Y1);
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static DEFINE_SPINLOCK(lock_Y2);
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static DEFINE_SPINLOCK(lock_Z1);
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static DEFINE_SPINLOCK(lock_Z2);
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static DEFINE_RWLOCK(rwlock_X1);
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static DEFINE_RWLOCK(rwlock_X2);
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static DEFINE_RWLOCK(rwlock_Y1);
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static DEFINE_RWLOCK(rwlock_Y2);
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static DEFINE_RWLOCK(rwlock_Z1);
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static DEFINE_RWLOCK(rwlock_Z2);
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static DEFINE_MUTEX(mutex_X1);
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static DEFINE_MUTEX(mutex_X2);
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static DEFINE_MUTEX(mutex_Y1);
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static DEFINE_MUTEX(mutex_Y2);
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static DEFINE_MUTEX(mutex_Z1);
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static DEFINE_MUTEX(mutex_Z2);
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static DECLARE_RWSEM(rwsem_X1);
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static DECLARE_RWSEM(rwsem_X2);
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static DECLARE_RWSEM(rwsem_Y1);
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static DECLARE_RWSEM(rwsem_Y2);
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static DECLARE_RWSEM(rwsem_Z1);
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static DECLARE_RWSEM(rwsem_Z2);
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/*
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* non-inlined runtime initializers, to let separate locks share
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* the same lock-class:
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*/
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#define INIT_CLASS_FUNC(class) \
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static noinline void \
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init_class_##class(spinlock_t *lock, rwlock_t *rwlock, struct mutex *mutex, \
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struct rw_semaphore *rwsem) \
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{ \
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spin_lock_init(lock); \
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rwlock_init(rwlock); \
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mutex_init(mutex); \
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init_rwsem(rwsem); \
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}
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INIT_CLASS_FUNC(X)
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INIT_CLASS_FUNC(Y)
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INIT_CLASS_FUNC(Z)
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static void init_shared_classes(void)
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{
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init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1);
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init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2);
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init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1);
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init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2);
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init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1);
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init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2);
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}
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/*
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* For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests.
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* The following functions use a lock from a simulated hardirq/softirq
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* context, causing the locks to be marked as hardirq-safe/softirq-safe:
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*/
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#define HARDIRQ_DISABLE local_irq_disable
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#define HARDIRQ_ENABLE local_irq_enable
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#define HARDIRQ_ENTER() \
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local_irq_disable(); \
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irq_enter(); \
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WARN_ON(!in_irq());
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#define HARDIRQ_EXIT() \
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__irq_exit(); \
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local_irq_enable();
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#define SOFTIRQ_DISABLE local_bh_disable
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#define SOFTIRQ_ENABLE local_bh_enable
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#define SOFTIRQ_ENTER() \
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local_bh_disable(); \
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local_irq_disable(); \
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trace_softirq_enter(); \
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WARN_ON(!in_softirq());
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#define SOFTIRQ_EXIT() \
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trace_softirq_exit(); \
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local_irq_enable(); \
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local_bh_enable();
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/*
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* Shortcuts for lock/unlock API variants, to keep
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* the testcases compact:
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*/
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#define L(x) spin_lock(&lock_##x)
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#define U(x) spin_unlock(&lock_##x)
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#define LU(x) L(x); U(x)
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#define SI(x) spin_lock_init(&lock_##x)
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#define WL(x) write_lock(&rwlock_##x)
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#define WU(x) write_unlock(&rwlock_##x)
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#define WLU(x) WL(x); WU(x)
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#define RL(x) read_lock(&rwlock_##x)
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#define RU(x) read_unlock(&rwlock_##x)
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#define RLU(x) RL(x); RU(x)
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#define RWI(x) rwlock_init(&rwlock_##x)
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#define ML(x) mutex_lock(&mutex_##x)
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#define MU(x) mutex_unlock(&mutex_##x)
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#define MI(x) mutex_init(&mutex_##x)
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#define WSL(x) down_write(&rwsem_##x)
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#define WSU(x) up_write(&rwsem_##x)
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#define RSL(x) down_read(&rwsem_##x)
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#define RSU(x) up_read(&rwsem_##x)
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#define RWSI(x) init_rwsem(&rwsem_##x)
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#define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
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/*
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* Generate different permutations of the same testcase, using
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* the same basic lock-dependency/state events:
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*/
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#define GENERATE_TESTCASE(name) \
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\
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static void name(void) { E(); }
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#define GENERATE_PERMUTATIONS_2_EVENTS(name) \
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\
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static void name##_12(void) { E1(); E2(); } \
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static void name##_21(void) { E2(); E1(); }
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#define GENERATE_PERMUTATIONS_3_EVENTS(name) \
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\
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static void name##_123(void) { E1(); E2(); E3(); } \
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static void name##_132(void) { E1(); E3(); E2(); } \
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static void name##_213(void) { E2(); E1(); E3(); } \
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static void name##_231(void) { E2(); E3(); E1(); } \
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static void name##_312(void) { E3(); E1(); E2(); } \
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static void name##_321(void) { E3(); E2(); E1(); }
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/*
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* AA deadlock:
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*/
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#define E() \
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\
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LOCK(X1); \
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LOCK(X2); /* this one should fail */
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| 231 |
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/*
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| 232 |
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* 6 testcases:
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*/
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#include "locking-selftest-spin.h"
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GENERATE_TESTCASE(AA_spin)
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#include "locking-selftest-wlock.h"
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GENERATE_TESTCASE(AA_wlock)
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#include "locking-selftest-rlock.h"
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GENERATE_TESTCASE(AA_rlock)
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#include "locking-selftest-mutex.h"
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GENERATE_TESTCASE(AA_mutex)
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#include "locking-selftest-wsem.h"
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GENERATE_TESTCASE(AA_wsem)
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#include "locking-selftest-rsem.h"
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GENERATE_TESTCASE(AA_rsem)
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| 247 |
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#undef E
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| 248 |
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| 249 |
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/*
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| 250 |
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* Special-case for read-locking, they are
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| 251 |
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* allowed to recurse on the same lock class:
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| 252 |
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*/
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| 253 |
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static void rlock_AA1(void)
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| 254 |
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{
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| 255 |
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RL(X1);
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| 256 |
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RL(X1); // this one should NOT fail
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| 257 |
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}
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| 258 |
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| 259 |
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static void rlock_AA1B(void)
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| 260 |
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{
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| 261 |
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RL(X1);
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| 262 |
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RL(X2); // this one should NOT fail
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| 263 |
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}
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| 264 |
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| 265 |
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static void rsem_AA1(void)
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| 266 |
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{
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| 267 |
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RSL(X1);
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| 268 |
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RSL(X1); // this one should fail
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| 269 |
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}
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| 270 |
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| 271 |
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static void rsem_AA1B(void)
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| 272 |
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{
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| 273 |
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RSL(X1);
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| 274 |
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RSL(X2); // this one should fail
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| 275 |
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}
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| 276 |
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/*
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| 277 |
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* The mixing of read and write locks is not allowed:
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| 278 |
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*/
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| 279 |
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static void rlock_AA2(void)
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| 280 |
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{
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| 281 |
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RL(X1);
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| 282 |
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WL(X2); // this one should fail
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| 283 |
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}
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| 284 |
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| 285 |
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static void rsem_AA2(void)
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| 286 |
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{
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| 287 |
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RSL(X1);
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| 288 |
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WSL(X2); // this one should fail
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| 289 |
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}
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| 290 |
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| 291 |
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static void rlock_AA3(void)
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| 292 |
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{
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| 293 |
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WL(X1);
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| 294 |
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RL(X2); // this one should fail
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| 295 |
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}
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| 296 |
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| 297 |
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static void rsem_AA3(void)
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| 298 |
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{
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| 299 |
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WSL(X1);
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| 300 |
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RSL(X2); // this one should fail
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| 301 |
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}
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| 302 |
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| 303 |
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/*
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| 304 |
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* ABBA deadlock:
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| 305 |
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*/
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| 306 |
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| 307 |
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#define E() \
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| 308 |
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\
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| 309 |
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LOCK_UNLOCK_2(A, B); \
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| 310 |
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LOCK_UNLOCK_2(B, A); /* fail */
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| 311 |
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| 312 |
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/*
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| 313 |
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* 6 testcases:
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| 314 |
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*/
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| 315 |
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#include "locking-selftest-spin.h"
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| 316 |
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GENERATE_TESTCASE(ABBA_spin)
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| 317 |
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#include "locking-selftest-wlock.h"
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| 318 |
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GENERATE_TESTCASE(ABBA_wlock)
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| 319 |
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#include "locking-selftest-rlock.h"
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| 320 |
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GENERATE_TESTCASE(ABBA_rlock)
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| 321 |
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#include "locking-selftest-mutex.h"
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| 322 |
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GENERATE_TESTCASE(ABBA_mutex)
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| 323 |
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#include "locking-selftest-wsem.h"
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| 324 |
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GENERATE_TESTCASE(ABBA_wsem)
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| 325 |
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#include "locking-selftest-rsem.h"
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| 326 |
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GENERATE_TESTCASE(ABBA_rsem)
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| 327 |
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| 328 |
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#undef E
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| 329 |
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| 330 |
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/*
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| 331 |
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* AB BC CA deadlock:
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| 332 |
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*/
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| 333 |
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| 334 |
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#define E() \
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| 335 |
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\
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| 336 |
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LOCK_UNLOCK_2(A, B); \
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| 337 |
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LOCK_UNLOCK_2(B, C); \
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| 338 |
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LOCK_UNLOCK_2(C, A); /* fail */
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| 339 |
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| 340 |
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/*
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| 341 |
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* 6 testcases:
|
| 342 |
|
|
*/
|
| 343 |
|
|
#include "locking-selftest-spin.h"
|
| 344 |
|
|
GENERATE_TESTCASE(ABBCCA_spin)
|
| 345 |
|
|
#include "locking-selftest-wlock.h"
|
| 346 |
|
|
GENERATE_TESTCASE(ABBCCA_wlock)
|
| 347 |
|
|
#include "locking-selftest-rlock.h"
|
| 348 |
|
|
GENERATE_TESTCASE(ABBCCA_rlock)
|
| 349 |
|
|
#include "locking-selftest-mutex.h"
|
| 350 |
|
|
GENERATE_TESTCASE(ABBCCA_mutex)
|
| 351 |
|
|
#include "locking-selftest-wsem.h"
|
| 352 |
|
|
GENERATE_TESTCASE(ABBCCA_wsem)
|
| 353 |
|
|
#include "locking-selftest-rsem.h"
|
| 354 |
|
|
GENERATE_TESTCASE(ABBCCA_rsem)
|
| 355 |
|
|
|
| 356 |
|
|
#undef E
|
| 357 |
|
|
|
| 358 |
|
|
/*
|
| 359 |
|
|
* AB CA BC deadlock:
|
| 360 |
|
|
*/
|
| 361 |
|
|
|
| 362 |
|
|
#define E() \
|
| 363 |
|
|
\
|
| 364 |
|
|
LOCK_UNLOCK_2(A, B); \
|
| 365 |
|
|
LOCK_UNLOCK_2(C, A); \
|
| 366 |
|
|
LOCK_UNLOCK_2(B, C); /* fail */
|
| 367 |
|
|
|
| 368 |
|
|
/*
|
| 369 |
|
|
* 6 testcases:
|
| 370 |
|
|
*/
|
| 371 |
|
|
#include "locking-selftest-spin.h"
|
| 372 |
|
|
GENERATE_TESTCASE(ABCABC_spin)
|
| 373 |
|
|
#include "locking-selftest-wlock.h"
|
| 374 |
|
|
GENERATE_TESTCASE(ABCABC_wlock)
|
| 375 |
|
|
#include "locking-selftest-rlock.h"
|
| 376 |
|
|
GENERATE_TESTCASE(ABCABC_rlock)
|
| 377 |
|
|
#include "locking-selftest-mutex.h"
|
| 378 |
|
|
GENERATE_TESTCASE(ABCABC_mutex)
|
| 379 |
|
|
#include "locking-selftest-wsem.h"
|
| 380 |
|
|
GENERATE_TESTCASE(ABCABC_wsem)
|
| 381 |
|
|
#include "locking-selftest-rsem.h"
|
| 382 |
|
|
GENERATE_TESTCASE(ABCABC_rsem)
|
| 383 |
|
|
|
| 384 |
|
|
#undef E
|
| 385 |
|
|
|
| 386 |
|
|
/*
|
| 387 |
|
|
* AB BC CD DA deadlock:
|
| 388 |
|
|
*/
|
| 389 |
|
|
|
| 390 |
|
|
#define E() \
|
| 391 |
|
|
\
|
| 392 |
|
|
LOCK_UNLOCK_2(A, B); \
|
| 393 |
|
|
LOCK_UNLOCK_2(B, C); \
|
| 394 |
|
|
LOCK_UNLOCK_2(C, D); \
|
| 395 |
|
|
LOCK_UNLOCK_2(D, A); /* fail */
|
| 396 |
|
|
|
| 397 |
|
|
/*
|
| 398 |
|
|
* 6 testcases:
|
| 399 |
|
|
*/
|
| 400 |
|
|
#include "locking-selftest-spin.h"
|
| 401 |
|
|
GENERATE_TESTCASE(ABBCCDDA_spin)
|
| 402 |
|
|
#include "locking-selftest-wlock.h"
|
| 403 |
|
|
GENERATE_TESTCASE(ABBCCDDA_wlock)
|
| 404 |
|
|
#include "locking-selftest-rlock.h"
|
| 405 |
|
|
GENERATE_TESTCASE(ABBCCDDA_rlock)
|
| 406 |
|
|
#include "locking-selftest-mutex.h"
|
| 407 |
|
|
GENERATE_TESTCASE(ABBCCDDA_mutex)
|
| 408 |
|
|
#include "locking-selftest-wsem.h"
|
| 409 |
|
|
GENERATE_TESTCASE(ABBCCDDA_wsem)
|
| 410 |
|
|
#include "locking-selftest-rsem.h"
|
| 411 |
|
|
GENERATE_TESTCASE(ABBCCDDA_rsem)
|
| 412 |
|
|
|
| 413 |
|
|
#undef E
|
| 414 |
|
|
|
| 415 |
|
|
/*
|
| 416 |
|
|
* AB CD BD DA deadlock:
|
| 417 |
|
|
*/
|
| 418 |
|
|
#define E() \
|
| 419 |
|
|
\
|
| 420 |
|
|
LOCK_UNLOCK_2(A, B); \
|
| 421 |
|
|
LOCK_UNLOCK_2(C, D); \
|
| 422 |
|
|
LOCK_UNLOCK_2(B, D); \
|
| 423 |
|
|
LOCK_UNLOCK_2(D, A); /* fail */
|
| 424 |
|
|
|
| 425 |
|
|
/*
|
| 426 |
|
|
* 6 testcases:
|
| 427 |
|
|
*/
|
| 428 |
|
|
#include "locking-selftest-spin.h"
|
| 429 |
|
|
GENERATE_TESTCASE(ABCDBDDA_spin)
|
| 430 |
|
|
#include "locking-selftest-wlock.h"
|
| 431 |
|
|
GENERATE_TESTCASE(ABCDBDDA_wlock)
|
| 432 |
|
|
#include "locking-selftest-rlock.h"
|
| 433 |
|
|
GENERATE_TESTCASE(ABCDBDDA_rlock)
|
| 434 |
|
|
#include "locking-selftest-mutex.h"
|
| 435 |
|
|
GENERATE_TESTCASE(ABCDBDDA_mutex)
|
| 436 |
|
|
#include "locking-selftest-wsem.h"
|
| 437 |
|
|
GENERATE_TESTCASE(ABCDBDDA_wsem)
|
| 438 |
|
|
#include "locking-selftest-rsem.h"
|
| 439 |
|
|
GENERATE_TESTCASE(ABCDBDDA_rsem)
|
| 440 |
|
|
|
| 441 |
|
|
#undef E
|
| 442 |
|
|
|
| 443 |
|
|
/*
|
| 444 |
|
|
* AB CD BC DA deadlock:
|
| 445 |
|
|
*/
|
| 446 |
|
|
#define E() \
|
| 447 |
|
|
\
|
| 448 |
|
|
LOCK_UNLOCK_2(A, B); \
|
| 449 |
|
|
LOCK_UNLOCK_2(C, D); \
|
| 450 |
|
|
LOCK_UNLOCK_2(B, C); \
|
| 451 |
|
|
LOCK_UNLOCK_2(D, A); /* fail */
|
| 452 |
|
|
|
| 453 |
|
|
/*
|
| 454 |
|
|
* 6 testcases:
|
| 455 |
|
|
*/
|
| 456 |
|
|
#include "locking-selftest-spin.h"
|
| 457 |
|
|
GENERATE_TESTCASE(ABCDBCDA_spin)
|
| 458 |
|
|
#include "locking-selftest-wlock.h"
|
| 459 |
|
|
GENERATE_TESTCASE(ABCDBCDA_wlock)
|
| 460 |
|
|
#include "locking-selftest-rlock.h"
|
| 461 |
|
|
GENERATE_TESTCASE(ABCDBCDA_rlock)
|
| 462 |
|
|
#include "locking-selftest-mutex.h"
|
| 463 |
|
|
GENERATE_TESTCASE(ABCDBCDA_mutex)
|
| 464 |
|
|
#include "locking-selftest-wsem.h"
|
| 465 |
|
|
GENERATE_TESTCASE(ABCDBCDA_wsem)
|
| 466 |
|
|
#include "locking-selftest-rsem.h"
|
| 467 |
|
|
GENERATE_TESTCASE(ABCDBCDA_rsem)
|
| 468 |
|
|
|
| 469 |
|
|
#undef E
|
| 470 |
|
|
|
| 471 |
|
|
/*
|
| 472 |
|
|
* Double unlock:
|
| 473 |
|
|
*/
|
| 474 |
|
|
#define E() \
|
| 475 |
|
|
\
|
| 476 |
|
|
LOCK(A); \
|
| 477 |
|
|
UNLOCK(A); \
|
| 478 |
|
|
UNLOCK(A); /* fail */
|
| 479 |
|
|
|
| 480 |
|
|
/*
|
| 481 |
|
|
* 6 testcases:
|
| 482 |
|
|
*/
|
| 483 |
|
|
#include "locking-selftest-spin.h"
|
| 484 |
|
|
GENERATE_TESTCASE(double_unlock_spin)
|
| 485 |
|
|
#include "locking-selftest-wlock.h"
|
| 486 |
|
|
GENERATE_TESTCASE(double_unlock_wlock)
|
| 487 |
|
|
#include "locking-selftest-rlock.h"
|
| 488 |
|
|
GENERATE_TESTCASE(double_unlock_rlock)
|
| 489 |
|
|
#include "locking-selftest-mutex.h"
|
| 490 |
|
|
GENERATE_TESTCASE(double_unlock_mutex)
|
| 491 |
|
|
#include "locking-selftest-wsem.h"
|
| 492 |
|
|
GENERATE_TESTCASE(double_unlock_wsem)
|
| 493 |
|
|
#include "locking-selftest-rsem.h"
|
| 494 |
|
|
GENERATE_TESTCASE(double_unlock_rsem)
|
| 495 |
|
|
|
| 496 |
|
|
#undef E
|
| 497 |
|
|
|
| 498 |
|
|
/*
|
| 499 |
|
|
* Bad unlock ordering:
|
| 500 |
|
|
*/
|
| 501 |
|
|
#define E() \
|
| 502 |
|
|
\
|
| 503 |
|
|
LOCK(A); \
|
| 504 |
|
|
LOCK(B); \
|
| 505 |
|
|
UNLOCK(A); /* fail */ \
|
| 506 |
|
|
UNLOCK(B);
|
| 507 |
|
|
|
| 508 |
|
|
/*
|
| 509 |
|
|
* 6 testcases:
|
| 510 |
|
|
*/
|
| 511 |
|
|
#include "locking-selftest-spin.h"
|
| 512 |
|
|
GENERATE_TESTCASE(bad_unlock_order_spin)
|
| 513 |
|
|
#include "locking-selftest-wlock.h"
|
| 514 |
|
|
GENERATE_TESTCASE(bad_unlock_order_wlock)
|
| 515 |
|
|
#include "locking-selftest-rlock.h"
|
| 516 |
|
|
GENERATE_TESTCASE(bad_unlock_order_rlock)
|
| 517 |
|
|
#include "locking-selftest-mutex.h"
|
| 518 |
|
|
GENERATE_TESTCASE(bad_unlock_order_mutex)
|
| 519 |
|
|
#include "locking-selftest-wsem.h"
|
| 520 |
|
|
GENERATE_TESTCASE(bad_unlock_order_wsem)
|
| 521 |
|
|
#include "locking-selftest-rsem.h"
|
| 522 |
|
|
GENERATE_TESTCASE(bad_unlock_order_rsem)
|
| 523 |
|
|
|
| 524 |
|
|
#undef E
|
| 525 |
|
|
|
| 526 |
|
|
/*
|
| 527 |
|
|
* initializing a held lock:
|
| 528 |
|
|
*/
|
| 529 |
|
|
#define E() \
|
| 530 |
|
|
\
|
| 531 |
|
|
LOCK(A); \
|
| 532 |
|
|
INIT(A); /* fail */
|
| 533 |
|
|
|
| 534 |
|
|
/*
|
| 535 |
|
|
* 6 testcases:
|
| 536 |
|
|
*/
|
| 537 |
|
|
#include "locking-selftest-spin.h"
|
| 538 |
|
|
GENERATE_TESTCASE(init_held_spin)
|
| 539 |
|
|
#include "locking-selftest-wlock.h"
|
| 540 |
|
|
GENERATE_TESTCASE(init_held_wlock)
|
| 541 |
|
|
#include "locking-selftest-rlock.h"
|
| 542 |
|
|
GENERATE_TESTCASE(init_held_rlock)
|
| 543 |
|
|
#include "locking-selftest-mutex.h"
|
| 544 |
|
|
GENERATE_TESTCASE(init_held_mutex)
|
| 545 |
|
|
#include "locking-selftest-wsem.h"
|
| 546 |
|
|
GENERATE_TESTCASE(init_held_wsem)
|
| 547 |
|
|
#include "locking-selftest-rsem.h"
|
| 548 |
|
|
GENERATE_TESTCASE(init_held_rsem)
|
| 549 |
|
|
|
| 550 |
|
|
#undef E
|
| 551 |
|
|
|
| 552 |
|
|
/*
|
| 553 |
|
|
* locking an irq-safe lock with irqs enabled:
|
| 554 |
|
|
*/
|
| 555 |
|
|
#define E1() \
|
| 556 |
|
|
\
|
| 557 |
|
|
IRQ_ENTER(); \
|
| 558 |
|
|
LOCK(A); \
|
| 559 |
|
|
UNLOCK(A); \
|
| 560 |
|
|
IRQ_EXIT();
|
| 561 |
|
|
|
| 562 |
|
|
#define E2() \
|
| 563 |
|
|
\
|
| 564 |
|
|
LOCK(A); \
|
| 565 |
|
|
UNLOCK(A);
|
| 566 |
|
|
|
| 567 |
|
|
/*
|
| 568 |
|
|
* Generate 24 testcases:
|
| 569 |
|
|
*/
|
| 570 |
|
|
#include "locking-selftest-spin-hardirq.h"
|
| 571 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)
|
| 572 |
|
|
|
| 573 |
|
|
#include "locking-selftest-rlock-hardirq.h"
|
| 574 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)
|
| 575 |
|
|
|
| 576 |
|
|
#include "locking-selftest-wlock-hardirq.h"
|
| 577 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock)
|
| 578 |
|
|
|
| 579 |
|
|
#include "locking-selftest-spin-softirq.h"
|
| 580 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin)
|
| 581 |
|
|
|
| 582 |
|
|
#include "locking-selftest-rlock-softirq.h"
|
| 583 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
|
| 584 |
|
|
|
| 585 |
|
|
#include "locking-selftest-wlock-softirq.h"
|
| 586 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)
|
| 587 |
|
|
|
| 588 |
|
|
#undef E1
|
| 589 |
|
|
#undef E2
|
| 590 |
|
|
|
| 591 |
|
|
/*
|
| 592 |
|
|
* Enabling hardirqs with a softirq-safe lock held:
|
| 593 |
|
|
*/
|
| 594 |
|
|
#define E1() \
|
| 595 |
|
|
\
|
| 596 |
|
|
SOFTIRQ_ENTER(); \
|
| 597 |
|
|
LOCK(A); \
|
| 598 |
|
|
UNLOCK(A); \
|
| 599 |
|
|
SOFTIRQ_EXIT();
|
| 600 |
|
|
|
| 601 |
|
|
#define E2() \
|
| 602 |
|
|
\
|
| 603 |
|
|
HARDIRQ_DISABLE(); \
|
| 604 |
|
|
LOCK(A); \
|
| 605 |
|
|
HARDIRQ_ENABLE(); \
|
| 606 |
|
|
UNLOCK(A);
|
| 607 |
|
|
|
| 608 |
|
|
/*
|
| 609 |
|
|
* Generate 12 testcases:
|
| 610 |
|
|
*/
|
| 611 |
|
|
#include "locking-selftest-spin.h"
|
| 612 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin)
|
| 613 |
|
|
|
| 614 |
|
|
#include "locking-selftest-wlock.h"
|
| 615 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock)
|
| 616 |
|
|
|
| 617 |
|
|
#include "locking-selftest-rlock.h"
|
| 618 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
|
| 619 |
|
|
|
| 620 |
|
|
#undef E1
|
| 621 |
|
|
#undef E2
|
| 622 |
|
|
|
| 623 |
|
|
/*
|
| 624 |
|
|
* Enabling irqs with an irq-safe lock held:
|
| 625 |
|
|
*/
|
| 626 |
|
|
#define E1() \
|
| 627 |
|
|
\
|
| 628 |
|
|
IRQ_ENTER(); \
|
| 629 |
|
|
LOCK(A); \
|
| 630 |
|
|
UNLOCK(A); \
|
| 631 |
|
|
IRQ_EXIT();
|
| 632 |
|
|
|
| 633 |
|
|
#define E2() \
|
| 634 |
|
|
\
|
| 635 |
|
|
IRQ_DISABLE(); \
|
| 636 |
|
|
LOCK(A); \
|
| 637 |
|
|
IRQ_ENABLE(); \
|
| 638 |
|
|
UNLOCK(A);
|
| 639 |
|
|
|
| 640 |
|
|
/*
|
| 641 |
|
|
* Generate 24 testcases:
|
| 642 |
|
|
*/
|
| 643 |
|
|
#include "locking-selftest-spin-hardirq.h"
|
| 644 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)
|
| 645 |
|
|
|
| 646 |
|
|
#include "locking-selftest-rlock-hardirq.h"
|
| 647 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)
|
| 648 |
|
|
|
| 649 |
|
|
#include "locking-selftest-wlock-hardirq.h"
|
| 650 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock)
|
| 651 |
|
|
|
| 652 |
|
|
#include "locking-selftest-spin-softirq.h"
|
| 653 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin)
|
| 654 |
|
|
|
| 655 |
|
|
#include "locking-selftest-rlock-softirq.h"
|
| 656 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
|
| 657 |
|
|
|
| 658 |
|
|
#include "locking-selftest-wlock-softirq.h"
|
| 659 |
|
|
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
|
| 660 |
|
|
|
| 661 |
|
|
#undef E1
|
| 662 |
|
|
#undef E2
|
| 663 |
|
|
|
| 664 |
|
|
/*
|
| 665 |
|
|
* Acquiring a irq-unsafe lock while holding an irq-safe-lock:
|
| 666 |
|
|
*/
|
| 667 |
|
|
#define E1() \
|
| 668 |
|
|
\
|
| 669 |
|
|
LOCK(A); \
|
| 670 |
|
|
LOCK(B); \
|
| 671 |
|
|
UNLOCK(B); \
|
| 672 |
|
|
UNLOCK(A); \
|
| 673 |
|
|
|
| 674 |
|
|
#define E2() \
|
| 675 |
|
|
\
|
| 676 |
|
|
LOCK(B); \
|
| 677 |
|
|
UNLOCK(B);
|
| 678 |
|
|
|
| 679 |
|
|
#define E3() \
|
| 680 |
|
|
\
|
| 681 |
|
|
IRQ_ENTER(); \
|
| 682 |
|
|
LOCK(A); \
|
| 683 |
|
|
UNLOCK(A); \
|
| 684 |
|
|
IRQ_EXIT();
|
| 685 |
|
|
|
| 686 |
|
|
/*
|
| 687 |
|
|
* Generate 36 testcases:
|
| 688 |
|
|
*/
|
| 689 |
|
|
#include "locking-selftest-spin-hardirq.h"
|
| 690 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)
|
| 691 |
|
|
|
| 692 |
|
|
#include "locking-selftest-rlock-hardirq.h"
|
| 693 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)
|
| 694 |
|
|
|
| 695 |
|
|
#include "locking-selftest-wlock-hardirq.h"
|
| 696 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock)
|
| 697 |
|
|
|
| 698 |
|
|
#include "locking-selftest-spin-softirq.h"
|
| 699 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin)
|
| 700 |
|
|
|
| 701 |
|
|
#include "locking-selftest-rlock-softirq.h"
|
| 702 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
|
| 703 |
|
|
|
| 704 |
|
|
#include "locking-selftest-wlock-softirq.h"
|
| 705 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
|
| 706 |
|
|
|
| 707 |
|
|
#undef E1
|
| 708 |
|
|
#undef E2
|
| 709 |
|
|
#undef E3
|
| 710 |
|
|
|
| 711 |
|
|
/*
|
| 712 |
|
|
* If a lock turns into softirq-safe, but earlier it took
|
| 713 |
|
|
* a softirq-unsafe lock:
|
| 714 |
|
|
*/
|
| 715 |
|
|
|
| 716 |
|
|
#define E1() \
|
| 717 |
|
|
IRQ_DISABLE(); \
|
| 718 |
|
|
LOCK(A); \
|
| 719 |
|
|
LOCK(B); \
|
| 720 |
|
|
UNLOCK(B); \
|
| 721 |
|
|
UNLOCK(A); \
|
| 722 |
|
|
IRQ_ENABLE();
|
| 723 |
|
|
|
| 724 |
|
|
#define E2() \
|
| 725 |
|
|
LOCK(B); \
|
| 726 |
|
|
UNLOCK(B);
|
| 727 |
|
|
|
| 728 |
|
|
#define E3() \
|
| 729 |
|
|
IRQ_ENTER(); \
|
| 730 |
|
|
LOCK(A); \
|
| 731 |
|
|
UNLOCK(A); \
|
| 732 |
|
|
IRQ_EXIT();
|
| 733 |
|
|
|
| 734 |
|
|
/*
|
| 735 |
|
|
* Generate 36 testcases:
|
| 736 |
|
|
*/
|
| 737 |
|
|
#include "locking-selftest-spin-hardirq.h"
|
| 738 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)
|
| 739 |
|
|
|
| 740 |
|
|
#include "locking-selftest-rlock-hardirq.h"
|
| 741 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)
|
| 742 |
|
|
|
| 743 |
|
|
#include "locking-selftest-wlock-hardirq.h"
|
| 744 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock)
|
| 745 |
|
|
|
| 746 |
|
|
#include "locking-selftest-spin-softirq.h"
|
| 747 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin)
|
| 748 |
|
|
|
| 749 |
|
|
#include "locking-selftest-rlock-softirq.h"
|
| 750 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
|
| 751 |
|
|
|
| 752 |
|
|
#include "locking-selftest-wlock-softirq.h"
|
| 753 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)
|
| 754 |
|
|
|
| 755 |
|
|
#undef E1
|
| 756 |
|
|
#undef E2
|
| 757 |
|
|
#undef E3
|
| 758 |
|
|
|
| 759 |
|
|
/*
|
| 760 |
|
|
* read-lock / write-lock irq inversion.
|
| 761 |
|
|
*
|
| 762 |
|
|
* Deadlock scenario:
|
| 763 |
|
|
*
|
| 764 |
|
|
* CPU#1 is at #1, i.e. it has write-locked A, but has not
|
| 765 |
|
|
* taken B yet.
|
| 766 |
|
|
*
|
| 767 |
|
|
* CPU#2 is at #2, i.e. it has locked B.
|
| 768 |
|
|
*
|
| 769 |
|
|
* Hardirq hits CPU#2 at point #2 and is trying to read-lock A.
|
| 770 |
|
|
*
|
| 771 |
|
|
* The deadlock occurs because CPU#1 will spin on B, and CPU#2
|
| 772 |
|
|
* will spin on A.
|
| 773 |
|
|
*/
|
| 774 |
|
|
|
| 775 |
|
|
#define E1() \
|
| 776 |
|
|
\
|
| 777 |
|
|
IRQ_DISABLE(); \
|
| 778 |
|
|
WL(A); \
|
| 779 |
|
|
LOCK(B); \
|
| 780 |
|
|
UNLOCK(B); \
|
| 781 |
|
|
WU(A); \
|
| 782 |
|
|
IRQ_ENABLE();
|
| 783 |
|
|
|
| 784 |
|
|
#define E2() \
|
| 785 |
|
|
\
|
| 786 |
|
|
LOCK(B); \
|
| 787 |
|
|
UNLOCK(B);
|
| 788 |
|
|
|
| 789 |
|
|
#define E3() \
|
| 790 |
|
|
\
|
| 791 |
|
|
IRQ_ENTER(); \
|
| 792 |
|
|
RL(A); \
|
| 793 |
|
|
RU(A); \
|
| 794 |
|
|
IRQ_EXIT();
|
| 795 |
|
|
|
| 796 |
|
|
/*
|
| 797 |
|
|
* Generate 36 testcases:
|
| 798 |
|
|
*/
|
| 799 |
|
|
#include "locking-selftest-spin-hardirq.h"
|
| 800 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin)
|
| 801 |
|
|
|
| 802 |
|
|
#include "locking-selftest-rlock-hardirq.h"
|
| 803 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock)
|
| 804 |
|
|
|
| 805 |
|
|
#include "locking-selftest-wlock-hardirq.h"
|
| 806 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock)
|
| 807 |
|
|
|
| 808 |
|
|
#include "locking-selftest-spin-softirq.h"
|
| 809 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin)
|
| 810 |
|
|
|
| 811 |
|
|
#include "locking-selftest-rlock-softirq.h"
|
| 812 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock)
|
| 813 |
|
|
|
| 814 |
|
|
#include "locking-selftest-wlock-softirq.h"
|
| 815 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
|
| 816 |
|
|
|
| 817 |
|
|
#undef E1
|
| 818 |
|
|
#undef E2
|
| 819 |
|
|
#undef E3
|
| 820 |
|
|
|
| 821 |
|
|
/*
|
| 822 |
|
|
* read-lock / write-lock recursion that is actually safe.
|
| 823 |
|
|
*/
|
| 824 |
|
|
|
| 825 |
|
|
#define E1() \
|
| 826 |
|
|
\
|
| 827 |
|
|
IRQ_DISABLE(); \
|
| 828 |
|
|
WL(A); \
|
| 829 |
|
|
WU(A); \
|
| 830 |
|
|
IRQ_ENABLE();
|
| 831 |
|
|
|
| 832 |
|
|
#define E2() \
|
| 833 |
|
|
\
|
| 834 |
|
|
RL(A); \
|
| 835 |
|
|
RU(A); \
|
| 836 |
|
|
|
| 837 |
|
|
#define E3() \
|
| 838 |
|
|
\
|
| 839 |
|
|
IRQ_ENTER(); \
|
| 840 |
|
|
RL(A); \
|
| 841 |
|
|
L(B); \
|
| 842 |
|
|
U(B); \
|
| 843 |
|
|
RU(A); \
|
| 844 |
|
|
IRQ_EXIT();
|
| 845 |
|
|
|
| 846 |
|
|
/*
|
| 847 |
|
|
* Generate 12 testcases:
|
| 848 |
|
|
*/
|
| 849 |
|
|
#include "locking-selftest-hardirq.h"
|
| 850 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard)
|
| 851 |
|
|
|
| 852 |
|
|
#include "locking-selftest-softirq.h"
|
| 853 |
|
|
GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
|
| 854 |
|
|
|
| 855 |
|
|
#undef E1
|
| 856 |
|
|
#undef E2
|
| 857 |
|
|
#undef E3
|
| 858 |
|
|
|
| 859 |
|
|
/*
|
| 860 |
|
|
* read-lock / write-lock recursion that is unsafe.
|
| 861 |
|
|
*/
|
| 862 |
|
|
|
| 863 |
|
|
#define E1() \
|
| 864 |
|
|
\
|
| 865 |
|
|
IRQ_DISABLE(); \
|
| 866 |
|
|
L(B); \
|
| 867 |
|
|
WL(A); \
|
| 868 |
|
|
WU(A); \
|
| 869 |
|
|
U(B); \
|
| 870 |
|
|
IRQ_ENABLE();
|
| 871 |
|
|
|
| 872 |
|
|
#define E2() \
|
| 873 |
|
|
\
|
| 874 |
|
|
RL(A); \
|
| 875 |
|
|
RU(A); \
|
| 876 |
|
|
|
| 877 |
|
|
#define E3() \
|
| 878 |
|
|
\
|
| 879 |
|
|
IRQ_ENTER(); \
|
| 880 |
|
|
L(B); \
|
| 881 |
|
|
U(B); \
|
| 882 |
|
|
IRQ_EXIT();
|
| 883 |
|
|
|
| 884 |
|
|
/*
|
| 885 |
|
|
* Generate 12 testcases:
|
| 886 |
|
|
*/
|
| 887 |
|
|
#include "locking-selftest-hardirq.h"
|
| 888 |
|
|
// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard)
|
| 889 |
|
|
|
| 890 |
|
|
#include "locking-selftest-softirq.h"
|
| 891 |
|
|
// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft)
|
| 892 |
|
|
|
| 893 |
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
| 894 |
|
|
# define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map)
|
| 895 |
|
|
# define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map)
|
| 896 |
|
|
# define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map)
|
| 897 |
|
|
# define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map)
|
| 898 |
|
|
#else
|
| 899 |
|
|
# define I_SPINLOCK(x)
|
| 900 |
|
|
# define I_RWLOCK(x)
|
| 901 |
|
|
# define I_MUTEX(x)
|
| 902 |
|
|
# define I_RWSEM(x)
|
| 903 |
|
|
#endif
|
| 904 |
|
|
|
| 905 |
|
|
#define I1(x) \
|
| 906 |
|
|
do { \
|
| 907 |
|
|
I_SPINLOCK(x); \
|
| 908 |
|
|
I_RWLOCK(x); \
|
| 909 |
|
|
I_MUTEX(x); \
|
| 910 |
|
|
I_RWSEM(x); \
|
| 911 |
|
|
} while (0)
|
| 912 |
|
|
|
| 913 |
|
|
#define I2(x) \
|
| 914 |
|
|
do { \
|
| 915 |
|
|
spin_lock_init(&lock_##x); \
|
| 916 |
|
|
rwlock_init(&rwlock_##x); \
|
| 917 |
|
|
mutex_init(&mutex_##x); \
|
| 918 |
|
|
init_rwsem(&rwsem_##x); \
|
| 919 |
|
|
} while (0)
|
| 920 |
|
|
|
| 921 |
|
|
static void reset_locks(void)
|
| 922 |
|
|
{
|
| 923 |
|
|
local_irq_disable();
|
| 924 |
|
|
I1(A); I1(B); I1(C); I1(D);
|
| 925 |
|
|
I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
|
| 926 |
|
|
lockdep_reset();
|
| 927 |
|
|
I2(A); I2(B); I2(C); I2(D);
|
| 928 |
|
|
init_shared_classes();
|
| 929 |
|
|
local_irq_enable();
|
| 930 |
|
|
}
|
| 931 |
|
|
|
| 932 |
|
|
#undef I
|
| 933 |
|
|
|
| 934 |
|
|
static int testcase_total;
|
| 935 |
|
|
static int testcase_successes;
|
| 936 |
|
|
static int expected_testcase_failures;
|
| 937 |
|
|
static int unexpected_testcase_failures;
|
| 938 |
|
|
|
| 939 |
|
|
static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
|
| 940 |
|
|
{
|
| 941 |
|
|
unsigned long saved_preempt_count = preempt_count();
|
| 942 |
|
|
int expected_failure = 0;
|
| 943 |
|
|
|
| 944 |
|
|
WARN_ON(irqs_disabled());
|
| 945 |
|
|
|
| 946 |
|
|
testcase_fn();
|
| 947 |
|
|
/*
|
| 948 |
|
|
* Filter out expected failures:
|
| 949 |
|
|
*/
|
| 950 |
|
|
#ifndef CONFIG_PROVE_LOCKING
|
| 951 |
|
|
if ((lockclass_mask & LOCKTYPE_SPIN) && debug_locks != expected)
|
| 952 |
|
|
expected_failure = 1;
|
| 953 |
|
|
if ((lockclass_mask & LOCKTYPE_RWLOCK) && debug_locks != expected)
|
| 954 |
|
|
expected_failure = 1;
|
| 955 |
|
|
if ((lockclass_mask & LOCKTYPE_MUTEX) && debug_locks != expected)
|
| 956 |
|
|
expected_failure = 1;
|
| 957 |
|
|
if ((lockclass_mask & LOCKTYPE_RWSEM) && debug_locks != expected)
|
| 958 |
|
|
expected_failure = 1;
|
| 959 |
|
|
#endif
|
| 960 |
|
|
if (debug_locks != expected) {
|
| 961 |
|
|
if (expected_failure) {
|
| 962 |
|
|
expected_testcase_failures++;
|
| 963 |
|
|
printk("failed|");
|
| 964 |
|
|
} else {
|
| 965 |
|
|
unexpected_testcase_failures++;
|
| 966 |
|
|
|
| 967 |
|
|
printk("FAILED|");
|
| 968 |
|
|
dump_stack();
|
| 969 |
|
|
}
|
| 970 |
|
|
} else {
|
| 971 |
|
|
testcase_successes++;
|
| 972 |
|
|
printk(" ok |");
|
| 973 |
|
|
}
|
| 974 |
|
|
testcase_total++;
|
| 975 |
|
|
|
| 976 |
|
|
if (debug_locks_verbose)
|
| 977 |
|
|
printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
|
| 978 |
|
|
lockclass_mask, debug_locks, expected);
|
| 979 |
|
|
/*
|
| 980 |
|
|
* Some tests (e.g. double-unlock) might corrupt the preemption
|
| 981 |
|
|
* count, so restore it:
|
| 982 |
|
|
*/
|
| 983 |
|
|
preempt_count() = saved_preempt_count;
|
| 984 |
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
| 985 |
|
|
if (softirq_count())
|
| 986 |
|
|
current->softirqs_enabled = 0;
|
| 987 |
|
|
else
|
| 988 |
|
|
current->softirqs_enabled = 1;
|
| 989 |
|
|
#endif
|
| 990 |
|
|
|
| 991 |
|
|
reset_locks();
|
| 992 |
|
|
}
|
| 993 |
|
|
|
| 994 |
|
|
static inline void print_testname(const char *testname)
|
| 995 |
|
|
{
|
| 996 |
|
|
printk("%33s:", testname);
|
| 997 |
|
|
}
|
| 998 |
|
|
|
| 999 |
|
|
#define DO_TESTCASE_1(desc, name, nr) \
|
| 1000 |
|
|
print_testname(desc"/"#nr); \
|
| 1001 |
|
|
dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
|
| 1002 |
|
|
printk("\n");
|
| 1003 |
|
|
|
| 1004 |
|
|
#define DO_TESTCASE_1B(desc, name, nr) \
|
| 1005 |
|
|
print_testname(desc"/"#nr); \
|
| 1006 |
|
|
dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
|
| 1007 |
|
|
printk("\n");
|
| 1008 |
|
|
|
| 1009 |
|
|
#define DO_TESTCASE_3(desc, name, nr) \
|
| 1010 |
|
|
print_testname(desc"/"#nr); \
|
| 1011 |
|
|
dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \
|
| 1012 |
|
|
dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
|
| 1013 |
|
|
dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
|
| 1014 |
|
|
printk("\n");
|
| 1015 |
|
|
|
| 1016 |
|
|
#define DO_TESTCASE_3RW(desc, name, nr) \
|
| 1017 |
|
|
print_testname(desc"/"#nr); \
|
| 1018 |
|
|
dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\
|
| 1019 |
|
|
dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
|
| 1020 |
|
|
dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
|
| 1021 |
|
|
printk("\n");
|
| 1022 |
|
|
|
| 1023 |
|
|
#define DO_TESTCASE_6(desc, name) \
|
| 1024 |
|
|
print_testname(desc); \
|
| 1025 |
|
|
dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
|
| 1026 |
|
|
dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
|
| 1027 |
|
|
dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \
|
| 1028 |
|
|
dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
|
| 1029 |
|
|
dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
|
| 1030 |
|
|
dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
|
| 1031 |
|
|
printk("\n");
|
| 1032 |
|
|
|
| 1033 |
|
|
#define DO_TESTCASE_6_SUCCESS(desc, name) \
|
| 1034 |
|
|
print_testname(desc); \
|
| 1035 |
|
|
dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \
|
| 1036 |
|
|
dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \
|
| 1037 |
|
|
dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
|
| 1038 |
|
|
dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \
|
| 1039 |
|
|
dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \
|
| 1040 |
|
|
dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \
|
| 1041 |
|
|
printk("\n");
|
| 1042 |
|
|
|
| 1043 |
|
|
/*
|
| 1044 |
|
|
* 'read' variant: rlocks must not trigger.
|
| 1045 |
|
|
*/
|
| 1046 |
|
|
#define DO_TESTCASE_6R(desc, name) \
|
| 1047 |
|
|
print_testname(desc); \
|
| 1048 |
|
|
dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
|
| 1049 |
|
|
dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
|
| 1050 |
|
|
dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
|
| 1051 |
|
|
dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
|
| 1052 |
|
|
dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
|
| 1053 |
|
|
dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
|
| 1054 |
|
|
printk("\n");
|
| 1055 |
|
|
|
| 1056 |
|
|
#define DO_TESTCASE_2I(desc, name, nr) \
|
| 1057 |
|
|
DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
|
| 1058 |
|
|
DO_TESTCASE_1("soft-"desc, name##_soft, nr);
|
| 1059 |
|
|
|
| 1060 |
|
|
#define DO_TESTCASE_2IB(desc, name, nr) \
|
| 1061 |
|
|
DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
|
| 1062 |
|
|
DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
|
| 1063 |
|
|
|
| 1064 |
|
|
#define DO_TESTCASE_6I(desc, name, nr) \
|
| 1065 |
|
|
DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
|
| 1066 |
|
|
DO_TESTCASE_3("soft-"desc, name##_soft, nr);
|
| 1067 |
|
|
|
| 1068 |
|
|
#define DO_TESTCASE_6IRW(desc, name, nr) \
|
| 1069 |
|
|
DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
|
| 1070 |
|
|
DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
|
| 1071 |
|
|
|
| 1072 |
|
|
#define DO_TESTCASE_2x3(desc, name) \
|
| 1073 |
|
|
DO_TESTCASE_3(desc, name, 12); \
|
| 1074 |
|
|
DO_TESTCASE_3(desc, name, 21);
|
| 1075 |
|
|
|
| 1076 |
|
|
#define DO_TESTCASE_2x6(desc, name) \
|
| 1077 |
|
|
DO_TESTCASE_6I(desc, name, 12); \
|
| 1078 |
|
|
DO_TESTCASE_6I(desc, name, 21);
|
| 1079 |
|
|
|
| 1080 |
|
|
#define DO_TESTCASE_6x2(desc, name) \
|
| 1081 |
|
|
DO_TESTCASE_2I(desc, name, 123); \
|
| 1082 |
|
|
DO_TESTCASE_2I(desc, name, 132); \
|
| 1083 |
|
|
DO_TESTCASE_2I(desc, name, 213); \
|
| 1084 |
|
|
DO_TESTCASE_2I(desc, name, 231); \
|
| 1085 |
|
|
DO_TESTCASE_2I(desc, name, 312); \
|
| 1086 |
|
|
DO_TESTCASE_2I(desc, name, 321);
|
| 1087 |
|
|
|
| 1088 |
|
|
#define DO_TESTCASE_6x2B(desc, name) \
|
| 1089 |
|
|
DO_TESTCASE_2IB(desc, name, 123); \
|
| 1090 |
|
|
DO_TESTCASE_2IB(desc, name, 132); \
|
| 1091 |
|
|
DO_TESTCASE_2IB(desc, name, 213); \
|
| 1092 |
|
|
DO_TESTCASE_2IB(desc, name, 231); \
|
| 1093 |
|
|
DO_TESTCASE_2IB(desc, name, 312); \
|
| 1094 |
|
|
DO_TESTCASE_2IB(desc, name, 321);
|
| 1095 |
|
|
|
| 1096 |
|
|
#define DO_TESTCASE_6x6(desc, name) \
|
| 1097 |
|
|
DO_TESTCASE_6I(desc, name, 123); \
|
| 1098 |
|
|
DO_TESTCASE_6I(desc, name, 132); \
|
| 1099 |
|
|
DO_TESTCASE_6I(desc, name, 213); \
|
| 1100 |
|
|
DO_TESTCASE_6I(desc, name, 231); \
|
| 1101 |
|
|
DO_TESTCASE_6I(desc, name, 312); \
|
| 1102 |
|
|
DO_TESTCASE_6I(desc, name, 321);
|
| 1103 |
|
|
|
| 1104 |
|
|
#define DO_TESTCASE_6x6RW(desc, name) \
|
| 1105 |
|
|
DO_TESTCASE_6IRW(desc, name, 123); \
|
| 1106 |
|
|
DO_TESTCASE_6IRW(desc, name, 132); \
|
| 1107 |
|
|
DO_TESTCASE_6IRW(desc, name, 213); \
|
| 1108 |
|
|
DO_TESTCASE_6IRW(desc, name, 231); \
|
| 1109 |
|
|
DO_TESTCASE_6IRW(desc, name, 312); \
|
| 1110 |
|
|
DO_TESTCASE_6IRW(desc, name, 321);
|
| 1111 |
|
|
|
| 1112 |
|
|
|
| 1113 |
|
|
void locking_selftest(void)
|
| 1114 |
|
|
{
|
| 1115 |
|
|
/*
|
| 1116 |
|
|
* Got a locking failure before the selftest ran?
|
| 1117 |
|
|
*/
|
| 1118 |
|
|
if (!debug_locks) {
|
| 1119 |
|
|
printk("----------------------------------\n");
|
| 1120 |
|
|
printk("| Locking API testsuite disabled |\n");
|
| 1121 |
|
|
printk("----------------------------------\n");
|
| 1122 |
|
|
return;
|
| 1123 |
|
|
}
|
| 1124 |
|
|
|
| 1125 |
|
|
/*
|
| 1126 |
|
|
* Run the testsuite:
|
| 1127 |
|
|
*/
|
| 1128 |
|
|
printk("------------------------\n");
|
| 1129 |
|
|
printk("| Locking API testsuite:\n");
|
| 1130 |
|
|
printk("----------------------------------------------------------------------------\n");
|
| 1131 |
|
|
printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n");
|
| 1132 |
|
|
printk(" --------------------------------------------------------------------------\n");
|
| 1133 |
|
|
|
| 1134 |
|
|
init_shared_classes();
|
| 1135 |
|
|
debug_locks_silent = !debug_locks_verbose;
|
| 1136 |
|
|
|
| 1137 |
|
|
DO_TESTCASE_6R("A-A deadlock", AA);
|
| 1138 |
|
|
DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
|
| 1139 |
|
|
DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
|
| 1140 |
|
|
DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
|
| 1141 |
|
|
DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
|
| 1142 |
|
|
DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
|
| 1143 |
|
|
DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
|
| 1144 |
|
|
DO_TESTCASE_6("double unlock", double_unlock);
|
| 1145 |
|
|
DO_TESTCASE_6("initialize held", init_held);
|
| 1146 |
|
|
DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order);
|
| 1147 |
|
|
|
| 1148 |
|
|
printk(" --------------------------------------------------------------------------\n");
|
| 1149 |
|
|
print_testname("recursive read-lock");
|
| 1150 |
|
|
printk(" |");
|
| 1151 |
|
|
dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
|
| 1152 |
|
|
printk(" |");
|
| 1153 |
|
|
dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
|
| 1154 |
|
|
printk("\n");
|
| 1155 |
|
|
|
| 1156 |
|
|
print_testname("recursive read-lock #2");
|
| 1157 |
|
|
printk(" |");
|
| 1158 |
|
|
dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
|
| 1159 |
|
|
printk(" |");
|
| 1160 |
|
|
dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
|
| 1161 |
|
|
printk("\n");
|
| 1162 |
|
|
|
| 1163 |
|
|
print_testname("mixed read-write-lock");
|
| 1164 |
|
|
printk(" |");
|
| 1165 |
|
|
dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
|
| 1166 |
|
|
printk(" |");
|
| 1167 |
|
|
dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
|
| 1168 |
|
|
printk("\n");
|
| 1169 |
|
|
|
| 1170 |
|
|
print_testname("mixed write-read-lock");
|
| 1171 |
|
|
printk(" |");
|
| 1172 |
|
|
dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
|
| 1173 |
|
|
printk(" |");
|
| 1174 |
|
|
dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
|
| 1175 |
|
|
printk("\n");
|
| 1176 |
|
|
|
| 1177 |
|
|
printk(" --------------------------------------------------------------------------\n");
|
| 1178 |
|
|
|
| 1179 |
|
|
/*
|
| 1180 |
|
|
* irq-context testcases:
|
| 1181 |
|
|
*/
|
| 1182 |
|
|
DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
|
| 1183 |
|
|
DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
|
| 1184 |
|
|
DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
|
| 1185 |
|
|
DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
|
| 1186 |
|
|
DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
|
| 1187 |
|
|
DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
|
| 1188 |
|
|
|
| 1189 |
|
|
DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
|
| 1190 |
|
|
// DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2);
|
| 1191 |
|
|
|
| 1192 |
|
|
if (unexpected_testcase_failures) {
|
| 1193 |
|
|
printk("-----------------------------------------------------------------\n");
|
| 1194 |
|
|
debug_locks = 0;
|
| 1195 |
|
|
printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
|
| 1196 |
|
|
unexpected_testcase_failures, testcase_total);
|
| 1197 |
|
|
printk("-----------------------------------------------------------------\n");
|
| 1198 |
|
|
} else if (expected_testcase_failures && testcase_successes) {
|
| 1199 |
|
|
printk("--------------------------------------------------------\n");
|
| 1200 |
|
|
printk("%3d out of %3d testcases failed, as expected. |\n",
|
| 1201 |
|
|
expected_testcase_failures, testcase_total);
|
| 1202 |
|
|
printk("----------------------------------------------------\n");
|
| 1203 |
|
|
debug_locks = 1;
|
| 1204 |
|
|
} else if (expected_testcase_failures && !testcase_successes) {
|
| 1205 |
|
|
printk("--------------------------------------------------------\n");
|
| 1206 |
|
|
printk("All %3d testcases failed, as expected. |\n",
|
| 1207 |
|
|
expected_testcase_failures);
|
| 1208 |
|
|
printk("----------------------------------------\n");
|
| 1209 |
|
|
debug_locks = 1;
|
| 1210 |
|
|
} else {
|
| 1211 |
|
|
printk("-------------------------------------------------------\n");
|
| 1212 |
|
|
printk("Good, all %3d testcases passed! |\n",
|
| 1213 |
|
|
testcase_successes);
|
| 1214 |
|
|
printk("---------------------------------\n");
|
| 1215 |
|
|
debug_locks = 1;
|
| 1216 |
|
|
}
|
| 1217 |
|
|
debug_locks_silent = 0;
|
| 1218 |
|
|
}
|
