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lib/locking-selftest.c
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/* * lib/locking-selftest.c * * Testsuite for various locking APIs: spinlocks, rwlocks, * mutexes and rw-semaphores. * * It is checking both false positives and false negatives. * * Started by Ingo Molnar: * * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> */ #include <linux/rwsem.h> #include <linux/mutex.h> |
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#include <linux/ww_mutex.h> |
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#include <linux/sched.h> #include <linux/delay.h> |
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#include <linux/lockdep.h> |
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#include <linux/spinlock.h> #include <linux/kallsyms.h> #include <linux/interrupt.h> #include <linux/debug_locks.h> #include <linux/irqflags.h> /* * Change this to 1 if you want to see the failure printouts: */ static unsigned int debug_locks_verbose; |
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static DEFINE_WW_CLASS(ww_lockdep); |
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static int __init setup_debug_locks_verbose(char *str)
{
get_option(&str, &debug_locks_verbose);
return 1;
}
__setup("debug_locks_verbose=", setup_debug_locks_verbose);
#define FAILURE 0
#define SUCCESS 1
#define LOCKTYPE_SPIN 0x1
#define LOCKTYPE_RWLOCK 0x2
#define LOCKTYPE_MUTEX 0x4
#define LOCKTYPE_RWSEM 0x8
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#define LOCKTYPE_WW 0x10 static struct ww_acquire_ctx t, t2; |
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static struct ww_mutex o, o2, o3; |
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/* * Normal standalone locks, for the circular and irq-context * dependency tests: */ |
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static DEFINE_RAW_SPINLOCK(lock_A); static DEFINE_RAW_SPINLOCK(lock_B); static DEFINE_RAW_SPINLOCK(lock_C); static DEFINE_RAW_SPINLOCK(lock_D); |
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static DEFINE_RWLOCK(rwlock_A); static DEFINE_RWLOCK(rwlock_B); static DEFINE_RWLOCK(rwlock_C); static DEFINE_RWLOCK(rwlock_D); static DEFINE_MUTEX(mutex_A); static DEFINE_MUTEX(mutex_B); static DEFINE_MUTEX(mutex_C); static DEFINE_MUTEX(mutex_D); static DECLARE_RWSEM(rwsem_A); static DECLARE_RWSEM(rwsem_B); static DECLARE_RWSEM(rwsem_C); static DECLARE_RWSEM(rwsem_D); /* * Locks that we initialize dynamically as well so that * e.g. X1 and X2 becomes two instances of the same class, * but X* and Y* are different classes. We do this so that * we do not trigger a real lockup: */ |
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static DEFINE_RAW_SPINLOCK(lock_X1); static DEFINE_RAW_SPINLOCK(lock_X2); static DEFINE_RAW_SPINLOCK(lock_Y1); static DEFINE_RAW_SPINLOCK(lock_Y2); static DEFINE_RAW_SPINLOCK(lock_Z1); static DEFINE_RAW_SPINLOCK(lock_Z2); |
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static DEFINE_RWLOCK(rwlock_X1); static DEFINE_RWLOCK(rwlock_X2); static DEFINE_RWLOCK(rwlock_Y1); static DEFINE_RWLOCK(rwlock_Y2); static DEFINE_RWLOCK(rwlock_Z1); static DEFINE_RWLOCK(rwlock_Z2); static DEFINE_MUTEX(mutex_X1); static DEFINE_MUTEX(mutex_X2); static DEFINE_MUTEX(mutex_Y1); static DEFINE_MUTEX(mutex_Y2); static DEFINE_MUTEX(mutex_Z1); static DEFINE_MUTEX(mutex_Z2); static DECLARE_RWSEM(rwsem_X1); static DECLARE_RWSEM(rwsem_X2); static DECLARE_RWSEM(rwsem_Y1); static DECLARE_RWSEM(rwsem_Y2); static DECLARE_RWSEM(rwsem_Z1); static DECLARE_RWSEM(rwsem_Z2); /* * non-inlined runtime initializers, to let separate locks share * the same lock-class: */ #define INIT_CLASS_FUNC(class) \ static noinline void \ |
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init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \ struct mutex *mutex, struct rw_semaphore *rwsem)\ |
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{ \
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raw_spin_lock_init(lock); \ |
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rwlock_init(rwlock); \
mutex_init(mutex); \
init_rwsem(rwsem); \
}
INIT_CLASS_FUNC(X)
INIT_CLASS_FUNC(Y)
INIT_CLASS_FUNC(Z)
static void init_shared_classes(void)
{
init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1);
init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2);
init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1);
init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2);
init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1);
init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2);
}
/*
* For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests.
* The following functions use a lock from a simulated hardirq/softirq
* context, causing the locks to be marked as hardirq-safe/softirq-safe:
*/
#define HARDIRQ_DISABLE local_irq_disable
#define HARDIRQ_ENABLE local_irq_enable
#define HARDIRQ_ENTER() \
local_irq_disable(); \
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__irq_enter(); \ |
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WARN_ON(!in_irq()); #define HARDIRQ_EXIT() \ __irq_exit(); \ local_irq_enable(); #define SOFTIRQ_DISABLE local_bh_disable #define SOFTIRQ_ENABLE local_bh_enable #define SOFTIRQ_ENTER() \ local_bh_disable(); \ local_irq_disable(); \ |
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lockdep_softirq_enter(); \ |
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WARN_ON(!in_softirq()); #define SOFTIRQ_EXIT() \ |
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lockdep_softirq_exit(); \ |
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local_irq_enable(); \ local_bh_enable(); /* * Shortcuts for lock/unlock API variants, to keep * the testcases compact: */ |
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#define L(x) raw_spin_lock(&lock_##x) #define U(x) raw_spin_unlock(&lock_##x) |
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#define LU(x) L(x); U(x) |
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#define SI(x) raw_spin_lock_init(&lock_##x) |
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#define WL(x) write_lock(&rwlock_##x) #define WU(x) write_unlock(&rwlock_##x) #define WLU(x) WL(x); WU(x) #define RL(x) read_lock(&rwlock_##x) #define RU(x) read_unlock(&rwlock_##x) #define RLU(x) RL(x); RU(x) #define RWI(x) rwlock_init(&rwlock_##x) #define ML(x) mutex_lock(&mutex_##x) #define MU(x) mutex_unlock(&mutex_##x) #define MI(x) mutex_init(&mutex_##x) #define WSL(x) down_write(&rwsem_##x) #define WSU(x) up_write(&rwsem_##x) #define RSL(x) down_read(&rwsem_##x) #define RSU(x) up_read(&rwsem_##x) #define RWSI(x) init_rwsem(&rwsem_##x) |
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#ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH
#define WWAI(x) ww_acquire_init(x, &ww_lockdep)
#else
#define WWAI(x) do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0)
#endif
#define WWAD(x) ww_acquire_done(x)
#define WWAF(x) ww_acquire_fini(x)
#define WWL(x, c) ww_mutex_lock(x, c)
#define WWT(x) ww_mutex_trylock(x)
#define WWL1(x) ww_mutex_lock(x, NULL)
#define WWU(x) ww_mutex_unlock(x)
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#define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
/*
* Generate different permutations of the same testcase, using
* the same basic lock-dependency/state events:
*/
#define GENERATE_TESTCASE(name) \
\
static void name(void) { E(); }
#define GENERATE_PERMUTATIONS_2_EVENTS(name) \
\
static void name##_12(void) { E1(); E2(); } \
static void name##_21(void) { E2(); E1(); }
#define GENERATE_PERMUTATIONS_3_EVENTS(name) \
\
static void name##_123(void) { E1(); E2(); E3(); } \
static void name##_132(void) { E1(); E3(); E2(); } \
static void name##_213(void) { E2(); E1(); E3(); } \
static void name##_231(void) { E2(); E3(); E1(); } \
static void name##_312(void) { E3(); E1(); E2(); } \
static void name##_321(void) { E3(); E2(); E1(); }
/*
* AA deadlock:
*/
#define E() \
\
LOCK(X1); \
LOCK(X2); /* this one should fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(AA_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(AA_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(AA_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(AA_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(AA_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(AA_rsem)
#undef E
/*
* Special-case for read-locking, they are
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* allowed to recurse on the same lock class: |
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*/
static void rlock_AA1(void)
{
RL(X1);
RL(X1); // this one should NOT fail
}
static void rlock_AA1B(void)
{
RL(X1);
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RL(X2); // this one should NOT fail |
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}
static void rsem_AA1(void)
{
RSL(X1);
RSL(X1); // this one should fail
}
static void rsem_AA1B(void)
{
RSL(X1);
RSL(X2); // this one should fail
}
/*
* The mixing of read and write locks is not allowed:
*/
static void rlock_AA2(void)
{
RL(X1);
WL(X2); // this one should fail
}
static void rsem_AA2(void)
{
RSL(X1);
WSL(X2); // this one should fail
}
static void rlock_AA3(void)
{
WL(X1);
RL(X2); // this one should fail
}
static void rsem_AA3(void)
{
WSL(X1);
RSL(X2); // this one should fail
}
/*
* ABBA deadlock:
*/
#define E() \
\
LOCK_UNLOCK_2(A, B); \
LOCK_UNLOCK_2(B, A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(ABBA_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(ABBA_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(ABBA_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(ABBA_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(ABBA_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(ABBA_rsem)
#undef E
/*
* AB BC CA deadlock:
*/
#define E() \
\
LOCK_UNLOCK_2(A, B); \
LOCK_UNLOCK_2(B, C); \
LOCK_UNLOCK_2(C, A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(ABBCCA_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(ABBCCA_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(ABBCCA_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(ABBCCA_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(ABBCCA_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(ABBCCA_rsem)
#undef E
/*
* AB CA BC deadlock:
*/
#define E() \
\
LOCK_UNLOCK_2(A, B); \
LOCK_UNLOCK_2(C, A); \
LOCK_UNLOCK_2(B, C); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(ABCABC_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(ABCABC_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(ABCABC_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(ABCABC_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(ABCABC_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(ABCABC_rsem)
#undef E
/*
* AB BC CD DA deadlock:
*/
#define E() \
\
LOCK_UNLOCK_2(A, B); \
LOCK_UNLOCK_2(B, C); \
LOCK_UNLOCK_2(C, D); \
LOCK_UNLOCK_2(D, A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(ABBCCDDA_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(ABBCCDDA_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(ABBCCDDA_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(ABBCCDDA_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(ABBCCDDA_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(ABBCCDDA_rsem)
#undef E
/*
* AB CD BD DA deadlock:
*/
#define E() \
\
LOCK_UNLOCK_2(A, B); \
LOCK_UNLOCK_2(C, D); \
LOCK_UNLOCK_2(B, D); \
LOCK_UNLOCK_2(D, A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(ABCDBDDA_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(ABCDBDDA_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(ABCDBDDA_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(ABCDBDDA_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(ABCDBDDA_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(ABCDBDDA_rsem)
#undef E
/*
* AB CD BC DA deadlock:
*/
#define E() \
\
LOCK_UNLOCK_2(A, B); \
LOCK_UNLOCK_2(C, D); \
LOCK_UNLOCK_2(B, C); \
LOCK_UNLOCK_2(D, A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(ABCDBCDA_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(ABCDBCDA_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(ABCDBCDA_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(ABCDBCDA_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(ABCDBCDA_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(ABCDBCDA_rsem)
#undef E
/*
* Double unlock:
*/
#define E() \
\
LOCK(A); \
UNLOCK(A); \
UNLOCK(A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(double_unlock_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(double_unlock_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(double_unlock_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(double_unlock_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(double_unlock_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(double_unlock_rsem)
#undef E
/*
* Bad unlock ordering:
*/
#define E() \
\
LOCK(A); \
LOCK(B); \
UNLOCK(A); /* fail */ \
UNLOCK(B);
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(bad_unlock_order_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(bad_unlock_order_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(bad_unlock_order_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(bad_unlock_order_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(bad_unlock_order_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(bad_unlock_order_rsem)
#undef E
/*
* initializing a held lock:
*/
#define E() \
\
LOCK(A); \
INIT(A); /* fail */
/*
* 6 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_TESTCASE(init_held_spin)
#include "locking-selftest-wlock.h"
GENERATE_TESTCASE(init_held_wlock)
#include "locking-selftest-rlock.h"
GENERATE_TESTCASE(init_held_rlock)
#include "locking-selftest-mutex.h"
GENERATE_TESTCASE(init_held_mutex)
#include "locking-selftest-wsem.h"
GENERATE_TESTCASE(init_held_wsem)
#include "locking-selftest-rsem.h"
GENERATE_TESTCASE(init_held_rsem)
#undef E
/*
* locking an irq-safe lock with irqs enabled:
*/
#define E1() \
\
IRQ_ENTER(); \
LOCK(A); \
UNLOCK(A); \
IRQ_EXIT();
#define E2() \
\
LOCK(A); \
UNLOCK(A);
/*
* Generate 24 testcases:
*/
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)
#include "locking-selftest-wlock-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock)
#include "locking-selftest-spin-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin)
#include "locking-selftest-rlock-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)
#undef E1
#undef E2
/*
* Enabling hardirqs with a softirq-safe lock held:
*/
#define E1() \
\
SOFTIRQ_ENTER(); \
LOCK(A); \
UNLOCK(A); \
SOFTIRQ_EXIT();
#define E2() \
\
HARDIRQ_DISABLE(); \
LOCK(A); \
HARDIRQ_ENABLE(); \
UNLOCK(A);
/*
* Generate 12 testcases:
*/
#include "locking-selftest-spin.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin)
#include "locking-selftest-wlock.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock)
#include "locking-selftest-rlock.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
#undef E1
#undef E2
/*
* Enabling irqs with an irq-safe lock held:
*/
#define E1() \
\
IRQ_ENTER(); \
LOCK(A); \
UNLOCK(A); \
IRQ_EXIT();
#define E2() \
\
IRQ_DISABLE(); \
LOCK(A); \
IRQ_ENABLE(); \
UNLOCK(A);
/*
* Generate 24 testcases:
*/
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)
#include "locking-selftest-wlock-hardirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock)
#include "locking-selftest-spin-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin)
#include "locking-selftest-rlock-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
#undef E1
#undef E2
/*
* Acquiring a irq-unsafe lock while holding an irq-safe-lock:
*/
#define E1() \
\
LOCK(A); \
LOCK(B); \
UNLOCK(B); \
UNLOCK(A); \
#define E2() \
\
LOCK(B); \
UNLOCK(B);
#define E3() \
\
IRQ_ENTER(); \
LOCK(A); \
UNLOCK(A); \
IRQ_EXIT();
/*
* Generate 36 testcases:
*/
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)
#include "locking-selftest-wlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock)
#include "locking-selftest-spin-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin)
#include "locking-selftest-rlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
#undef E1
#undef E2
#undef E3
/*
* If a lock turns into softirq-safe, but earlier it took
* a softirq-unsafe lock:
*/
#define E1() \
IRQ_DISABLE(); \
LOCK(A); \
LOCK(B); \
UNLOCK(B); \
UNLOCK(A); \
IRQ_ENABLE();
#define E2() \
LOCK(B); \
UNLOCK(B);
#define E3() \
IRQ_ENTER(); \
LOCK(A); \
UNLOCK(A); \
IRQ_EXIT();
/*
* Generate 36 testcases:
*/
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)
#include "locking-selftest-wlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock)
#include "locking-selftest-spin-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin)
#include "locking-selftest-rlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)
#undef E1
#undef E2
#undef E3
/*
* read-lock / write-lock irq inversion.
*
* Deadlock scenario:
*
* CPU#1 is at #1, i.e. it has write-locked A, but has not
* taken B yet.
*
* CPU#2 is at #2, i.e. it has locked B.
*
* Hardirq hits CPU#2 at point #2 and is trying to read-lock A.
*
* The deadlock occurs because CPU#1 will spin on B, and CPU#2
* will spin on A.
*/
#define E1() \
\
IRQ_DISABLE(); \
WL(A); \
LOCK(B); \
UNLOCK(B); \
WU(A); \
IRQ_ENABLE();
#define E2() \
\
LOCK(B); \
UNLOCK(B);
#define E3() \
\
IRQ_ENTER(); \
RL(A); \
RU(A); \
IRQ_EXIT();
/*
* Generate 36 testcases:
*/
#include "locking-selftest-spin-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin)
#include "locking-selftest-rlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock)
#include "locking-selftest-wlock-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock)
#include "locking-selftest-spin-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin)
#include "locking-selftest-rlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock)
#include "locking-selftest-wlock-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
#undef E1
#undef E2
#undef E3
/*
* read-lock / write-lock recursion that is actually safe.
*/
#define E1() \
\
IRQ_DISABLE(); \
WL(A); \
WU(A); \
IRQ_ENABLE();
#define E2() \
\
RL(A); \
RU(A); \
#define E3() \
\
IRQ_ENTER(); \
RL(A); \
L(B); \
U(B); \
RU(A); \
IRQ_EXIT();
/*
* Generate 12 testcases:
*/
#include "locking-selftest-hardirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard)
#include "locking-selftest-softirq.h"
GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
#undef E1
#undef E2
#undef E3
/*
* read-lock / write-lock recursion that is unsafe.
*/
#define E1() \
\
IRQ_DISABLE(); \
L(B); \
WL(A); \
WU(A); \
U(B); \
IRQ_ENABLE();
#define E2() \
\
RL(A); \
RU(A); \
#define E3() \
\
IRQ_ENTER(); \
L(B); \
U(B); \
IRQ_EXIT();
/*
* Generate 12 testcases:
*/
#include "locking-selftest-hardirq.h"
// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard)
#include "locking-selftest-softirq.h"
// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft)
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
907 908 909 910 911 |
#ifdef CONFIG_DEBUG_LOCK_ALLOC # define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map) # define I_RWLOCK(x) lockdep_reset_lock(&rwlock_##x.dep_map) # define I_MUTEX(x) lockdep_reset_lock(&mutex_##x.dep_map) # define I_RWSEM(x) lockdep_reset_lock(&rwsem_##x.dep_map) |
|
1de994452
mutex: Add w/w te...
|
912 |
# define I_WW(x) lockdep_reset_lock(&x.dep_map) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
913 914 915 916 917 |
#else # define I_SPINLOCK(x) # define I_RWLOCK(x) # define I_MUTEX(x) # define I_RWSEM(x) |
|
1de994452
mutex: Add w/w te...
|
918 |
# define I_WW(x) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
919 920 921 922 923 924 925 926 927 928 929 930 |
#endif
#define I1(x) \
do { \
I_SPINLOCK(x); \
I_RWLOCK(x); \
I_MUTEX(x); \
I_RWSEM(x); \
} while (0)
#define I2(x) \
do { \
|
|
9fb1b90ce
lockdep: Selftest...
|
931 |
raw_spin_lock_init(&lock_##x); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
932 933 934 935 936 937 938 939 |
rwlock_init(&rwlock_##x); \
mutex_init(&mutex_##x); \
init_rwsem(&rwsem_##x); \
} while (0)
static void reset_locks(void)
{
local_irq_disable();
|
|
1de994452
mutex: Add w/w te...
|
940 941 |
lockdep_free_key_range(&ww_lockdep.acquire_key, 1); lockdep_free_key_range(&ww_lockdep.mutex_key, 1); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
942 943 |
I1(A); I1(B); I1(C); I1(D); I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2); |
|
f3cf139ef
mutex: Add more w...
|
944 |
I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
945 946 947 |
lockdep_reset(); I2(A); I2(B); I2(C); I2(D); init_shared_classes(); |
|
1de994452
mutex: Add w/w te...
|
948 |
|
|
f3cf139ef
mutex: Add more w...
|
949 |
ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
|
1de994452
mutex: Add w/w te...
|
950 951 952 |
memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2)); memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key)); memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key)); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
953 954 955 956 957 958 959 960 961 962 963 964 965 |
local_irq_enable();
}
#undef I
static int testcase_total;
static int testcase_successes;
static int expected_testcase_failures;
static int unexpected_testcase_failures;
static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
{
unsigned long saved_preempt_count = preempt_count();
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
966 967 968 969 970 971 972 973 |
WARN_ON(irqs_disabled()); testcase_fn(); /* * Filter out expected failures: */ #ifndef CONFIG_PROVE_LOCKING |
|
166989e36
locking-selftests...
|
974 |
if (expected == FAILURE && debug_locks) {
|
|
1de994452
mutex: Add w/w te...
|
975 |
expected_testcase_failures++; |
251394098
locking/selftest:...
|
976 |
pr_cont("failed|");
|
|
166989e36
locking-selftests...
|
977 978 979 980 |
}
else
#endif
if (debug_locks != expected) {
|
|
1de994452
mutex: Add w/w te...
|
981 |
unexpected_testcase_failures++; |
|
251394098
locking/selftest:...
|
982 |
pr_cont("FAILED|");
|
|
1de994452
mutex: Add w/w te...
|
983 984 |
dump_stack(); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
985 986 |
} else {
testcase_successes++;
|
|
251394098
locking/selftest:...
|
987 |
pr_cont(" ok |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
988 989 990 991 |
} testcase_total++; if (debug_locks_verbose) |
|
251394098
locking/selftest:...
|
992 993 |
pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d
",
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
994 995 996 997 998 |
lockclass_mask, debug_locks, expected); /* * Some tests (e.g. double-unlock) might corrupt the preemption * count, so restore it: */ |
4a2b4b222
sched: Introduce ...
|
999 |
preempt_count_set(saved_preempt_count); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 |
#ifdef CONFIG_TRACE_IRQFLAGS
if (softirq_count())
current->softirqs_enabled = 0;
else
current->softirqs_enabled = 1;
#endif
reset_locks();
}
static inline void print_testname(const char *testname)
{
printk("%33s:", testname);
}
#define DO_TESTCASE_1(desc, name, nr) \
print_testname(desc"/"#nr); \
dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
|
|
251394098
locking/selftest:...
|
1018 1019 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1020 1021 1022 1023 |
#define DO_TESTCASE_1B(desc, name, nr) \ print_testname(desc"/"#nr); \ dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ |
|
251394098
locking/selftest:...
|
1024 1025 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1026 1027 1028 1029 1030 1031 |
#define DO_TESTCASE_3(desc, name, nr) \ print_testname(desc"/"#nr); \ dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \ dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ |
|
251394098
locking/selftest:...
|
1032 1033 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1034 1035 1036 1037 1038 1039 |
#define DO_TESTCASE_3RW(desc, name, nr) \ print_testname(desc"/"#nr); \ dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\ dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \ dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \ |
|
251394098
locking/selftest:...
|
1040 1041 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1042 1043 1044 1045 1046 1047 1048 1049 1050 |
#define DO_TESTCASE_6(desc, name) \ print_testname(desc); \ dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \ dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ |
|
251394098
locking/selftest:...
|
1051 1052 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1053 1054 1055 1056 1057 1058 1059 1060 1061 |
#define DO_TESTCASE_6_SUCCESS(desc, name) \ print_testname(desc); \ dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \ dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \ dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \ dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \ dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \ |
|
251394098
locking/selftest:...
|
1062 1063 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 |
/* * 'read' variant: rlocks must not trigger. */ #define DO_TESTCASE_6R(desc, name) \ print_testname(desc); \ dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \ dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \ dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \ dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \ dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \ dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \ |
|
251394098
locking/selftest:...
|
1076 1077 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 |
#define DO_TESTCASE_2I(desc, name, nr) \
DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
DO_TESTCASE_1("soft-"desc, name##_soft, nr);
#define DO_TESTCASE_2IB(desc, name, nr) \
DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
#define DO_TESTCASE_6I(desc, name, nr) \
DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
DO_TESTCASE_3("soft-"desc, name##_soft, nr);
#define DO_TESTCASE_6IRW(desc, name, nr) \
DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
#define DO_TESTCASE_2x3(desc, name) \
DO_TESTCASE_3(desc, name, 12); \
DO_TESTCASE_3(desc, name, 21);
#define DO_TESTCASE_2x6(desc, name) \
DO_TESTCASE_6I(desc, name, 12); \
DO_TESTCASE_6I(desc, name, 21);
#define DO_TESTCASE_6x2(desc, name) \
DO_TESTCASE_2I(desc, name, 123); \
DO_TESTCASE_2I(desc, name, 132); \
DO_TESTCASE_2I(desc, name, 213); \
DO_TESTCASE_2I(desc, name, 231); \
DO_TESTCASE_2I(desc, name, 312); \
DO_TESTCASE_2I(desc, name, 321);
#define DO_TESTCASE_6x2B(desc, name) \
DO_TESTCASE_2IB(desc, name, 123); \
DO_TESTCASE_2IB(desc, name, 132); \
DO_TESTCASE_2IB(desc, name, 213); \
DO_TESTCASE_2IB(desc, name, 231); \
DO_TESTCASE_2IB(desc, name, 312); \
DO_TESTCASE_2IB(desc, name, 321);
#define DO_TESTCASE_6x6(desc, name) \
DO_TESTCASE_6I(desc, name, 123); \
DO_TESTCASE_6I(desc, name, 132); \
DO_TESTCASE_6I(desc, name, 213); \
DO_TESTCASE_6I(desc, name, 231); \
DO_TESTCASE_6I(desc, name, 312); \
DO_TESTCASE_6I(desc, name, 321);
#define DO_TESTCASE_6x6RW(desc, name) \
DO_TESTCASE_6IRW(desc, name, 123); \
DO_TESTCASE_6IRW(desc, name, 132); \
DO_TESTCASE_6IRW(desc, name, 213); \
DO_TESTCASE_6IRW(desc, name, 231); \
DO_TESTCASE_6IRW(desc, name, 312); \
DO_TESTCASE_6IRW(desc, name, 321);
|
|
1de994452
mutex: Add w/w te...
|
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 |
static void ww_test_fail_acquire(void)
{
int ret;
WWAI(&t);
t.stamp++;
ret = WWL(&o, &t);
if (WARN_ON(!o.ctx) ||
WARN_ON(ret))
return;
/* No lockdep test, pure API */
ret = WWL(&o, &t);
WARN_ON(ret != -EALREADY);
ret = WWT(&o);
WARN_ON(ret);
t2 = t;
t2.stamp++;
ret = WWL(&o, &t2);
WARN_ON(ret != -EDEADLK);
WWU(&o);
if (WWT(&o))
WWU(&o);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
else
DEBUG_LOCKS_WARN_ON(1);
#endif
}
|
|
2fe3d4b14
mutex: Add more t...
|
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 |
static void ww_test_normal(void)
{
int ret;
WWAI(&t);
/*
* None of the ww_mutex codepaths should be taken in the 'normal'
* mutex calls. The easiest way to verify this is by using the
* normal mutex calls, and making sure o.ctx is unmodified.
*/
/* mutex_lock (and indirectly, mutex_lock_nested) */
o.ctx = (void *)~0UL;
mutex_lock(&o.base);
mutex_unlock(&o.base);
WARN_ON(o.ctx != (void *)~0UL);
/* mutex_lock_interruptible (and *_nested) */
o.ctx = (void *)~0UL;
ret = mutex_lock_interruptible(&o.base);
if (!ret)
mutex_unlock(&o.base);
else
WARN_ON(1);
WARN_ON(o.ctx != (void *)~0UL);
/* mutex_lock_killable (and *_nested) */
o.ctx = (void *)~0UL;
ret = mutex_lock_killable(&o.base);
if (!ret)
mutex_unlock(&o.base);
else
WARN_ON(1);
WARN_ON(o.ctx != (void *)~0UL);
/* trylock, succeeding */
o.ctx = (void *)~0UL;
ret = mutex_trylock(&o.base);
WARN_ON(!ret);
if (ret)
mutex_unlock(&o.base);
else
WARN_ON(1);
WARN_ON(o.ctx != (void *)~0UL);
/* trylock, failing */
o.ctx = (void *)~0UL;
mutex_lock(&o.base);
ret = mutex_trylock(&o.base);
WARN_ON(ret);
mutex_unlock(&o.base);
WARN_ON(o.ctx != (void *)~0UL);
/* nest_lock */
o.ctx = (void *)~0UL;
mutex_lock_nest_lock(&o.base, &t);
mutex_unlock(&o.base);
WARN_ON(o.ctx != (void *)~0UL);
}
|
|
1de994452
mutex: Add w/w te...
|
1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 |
static void ww_test_two_contexts(void)
{
WWAI(&t);
WWAI(&t2);
}
static void ww_test_diff_class(void)
{
WWAI(&t);
#ifdef CONFIG_DEBUG_MUTEXES
t.ww_class = NULL;
#endif
WWL(&o, &t);
}
static void ww_test_context_done_twice(void)
{
WWAI(&t);
WWAD(&t);
WWAD(&t);
WWAF(&t);
}
static void ww_test_context_unlock_twice(void)
{
WWAI(&t);
WWAD(&t);
WWAF(&t);
WWAF(&t);
}
static void ww_test_context_fini_early(void)
{
WWAI(&t);
WWL(&o, &t);
WWAD(&t);
WWAF(&t);
}
static void ww_test_context_lock_after_done(void)
{
WWAI(&t);
WWAD(&t);
WWL(&o, &t);
}
static void ww_test_object_unlock_twice(void)
{
WWL1(&o);
WWU(&o);
WWU(&o);
}
static void ww_test_object_lock_unbalanced(void)
{
WWAI(&t);
WWL(&o, &t);
t.acquired = 0;
WWU(&o);
WWAF(&t);
}
static void ww_test_object_lock_stale_context(void)
{
WWAI(&t);
o.ctx = &t2;
WWL(&o, &t);
}
|
|
f3cf139ef
mutex: Add more w...
|
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 |
static void ww_test_edeadlk_normal(void)
{
int ret;
mutex_lock(&o2.base);
o2.ctx = &t2;
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
o2.ctx = NULL;
mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
mutex_unlock(&o2.base);
WWU(&o);
WWL(&o2, &t);
}
static void ww_test_edeadlk_normal_slow(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
o2.ctx = NULL;
mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
mutex_unlock(&o2.base);
WWU(&o);
ww_mutex_lock_slow(&o2, &t);
}
static void ww_test_edeadlk_no_unlock(void)
{
int ret;
mutex_lock(&o2.base);
o2.ctx = &t2;
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
o2.ctx = NULL;
mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
mutex_unlock(&o2.base);
WWL(&o2, &t);
}
static void ww_test_edeadlk_no_unlock_slow(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
o2.ctx = NULL;
mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
mutex_unlock(&o2.base);
ww_mutex_lock_slow(&o2, &t);
}
static void ww_test_edeadlk_acquire_more(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
ret = WWL(&o3, &t);
}
static void ww_test_edeadlk_acquire_more_slow(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
ww_mutex_lock_slow(&o3, &t);
}
static void ww_test_edeadlk_acquire_more_edeadlk(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
mutex_lock(&o3.base);
mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
o3.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
ret = WWL(&o3, &t);
WARN_ON(ret != -EDEADLK);
}
static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
mutex_lock(&o3.base);
mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
o3.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
ww_mutex_lock_slow(&o3, &t);
}
static void ww_test_edeadlk_acquire_wrong(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
if (!ret)
WWU(&o2);
WWU(&o);
ret = WWL(&o3, &t);
}
static void ww_test_edeadlk_acquire_wrong_slow(void)
{
int ret;
mutex_lock(&o2.base);
mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
o2.ctx = &t2;
WWAI(&t);
t2 = t;
t2.stamp--;
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret != -EDEADLK);
if (!ret)
WWU(&o2);
WWU(&o);
ww_mutex_lock_slow(&o3, &t);
}
|
|
1de994452
mutex: Add w/w te...
|
1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 |
static void ww_test_spin_nest_unlocked(void)
{
raw_spin_lock_nest_lock(&lock_A, &o.base);
U(A);
}
static void ww_test_unneeded_slow(void)
{
WWAI(&t);
ww_mutex_lock_slow(&o, &t);
}
static void ww_test_context_block(void)
{
int ret;
WWAI(&t);
ret = WWL(&o, &t);
WARN_ON(ret);
WWL1(&o2);
}
static void ww_test_context_try(void)
{
int ret;
WWAI(&t);
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWT(&o2);
WARN_ON(!ret);
WWU(&o2);
WWU(&o);
}
static void ww_test_context_context(void)
{
int ret;
WWAI(&t);
ret = WWL(&o, &t);
WARN_ON(ret);
ret = WWL(&o2, &t);
WARN_ON(ret);
WWU(&o2);
WWU(&o);
}
static void ww_test_try_block(void)
{
bool ret;
ret = WWT(&o);
WARN_ON(!ret);
WWL1(&o2);
WWU(&o2);
WWU(&o);
}
static void ww_test_try_try(void)
{
bool ret;
ret = WWT(&o);
WARN_ON(!ret);
ret = WWT(&o2);
WARN_ON(!ret);
WWU(&o2);
WWU(&o);
}
static void ww_test_try_context(void)
{
int ret;
ret = WWT(&o);
WARN_ON(!ret);
WWAI(&t);
ret = WWL(&o2, &t);
WARN_ON(ret);
}
static void ww_test_block_block(void)
{
WWL1(&o);
WWL1(&o2);
}
static void ww_test_block_try(void)
{
bool ret;
WWL1(&o);
ret = WWT(&o2);
WARN_ON(!ret);
}
static void ww_test_block_context(void)
{
int ret;
WWL1(&o);
WWAI(&t);
ret = WWL(&o2, &t);
WARN_ON(ret);
}
static void ww_test_spin_block(void)
{
L(A);
U(A);
WWL1(&o);
L(A);
U(A);
WWU(&o);
L(A);
WWL1(&o);
WWU(&o);
U(A);
}
static void ww_test_spin_try(void)
{
bool ret;
L(A);
U(A);
ret = WWT(&o);
WARN_ON(!ret);
L(A);
U(A);
WWU(&o);
L(A);
ret = WWT(&o);
WARN_ON(!ret);
WWU(&o);
U(A);
}
static void ww_test_spin_context(void)
{
int ret;
L(A);
U(A);
WWAI(&t);
ret = WWL(&o, &t);
WARN_ON(ret);
L(A);
U(A);
WWU(&o);
L(A);
ret = WWL(&o, &t);
WARN_ON(ret);
WWU(&o);
U(A);
}
static void ww_tests(void)
{
printk(" --------------------------------------------------------------------------
");
printk(" | Wound/wait tests |
");
printk(" ---------------------
");
print_testname("ww api failures");
dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW);
|
|
2fe3d4b14
mutex: Add more t...
|
1726 |
dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
|
1de994452
mutex: Add w/w te...
|
1727 |
dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
|
251394098
locking/selftest:...
|
1728 1729 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1730 1731 1732 1733 |
print_testname("ww contexts mixing");
dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1734 1735 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1736 1737 1738 1739 1740 1741 |
print_testname("finishing ww context");
dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW);
dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW);
dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW);
dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1742 1743 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1744 1745 1746 1747 1748 |
print_testname("locking mismatches");
dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW);
dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW);
dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1749 1750 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1751 |
|
|
f3cf139ef
mutex: Add more w...
|
1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 |
print_testname("EDEADLK handling");
dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW);
dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW);
dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW);
dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1763 1764 |
pr_cont("
");
|
|
f3cf139ef
mutex: Add more w...
|
1765 |
|
|
1de994452
mutex: Add w/w te...
|
1766 1767 |
print_testname("spinlock nest unlocked");
dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1768 1769 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 |
printk(" -----------------------------------------------------
");
printk(" |block | try |context|
");
printk(" -----------------------------------------------------
");
print_testname("context");
dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW);
dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW);
dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1782 1783 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1784 1785 1786 1787 1788 |
print_testname("try");
dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW);
dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW);
dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1789 1790 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1791 1792 1793 1794 1795 |
print_testname("block");
dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW);
dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW);
dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1796 1797 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1798 1799 1800 1801 1802 |
print_testname("spinlock");
dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW);
dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW);
dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
1803 1804 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
1805 |
} |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 |
void locking_selftest(void)
{
/*
* Got a locking failure before the selftest ran?
*/
if (!debug_locks) {
printk("----------------------------------
");
printk("| Locking API testsuite disabled |
");
printk("----------------------------------
");
return;
}
/*
* Run the testsuite:
*/
printk("------------------------
");
printk("| Locking API testsuite:
");
printk("----------------------------------------------------------------------------
");
printk(" | spin |wlock |rlock |mutex | wsem | rsem |
");
printk(" --------------------------------------------------------------------------
");
init_shared_classes();
debug_locks_silent = !debug_locks_verbose;
|
|
6c9076ec9
[PATCH] lockdep: ...
|
1838 |
DO_TESTCASE_6R("A-A deadlock", AA);
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 |
DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
DO_TESTCASE_6("double unlock", double_unlock);
DO_TESTCASE_6("initialize held", init_held);
DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order);
printk(" --------------------------------------------------------------------------
");
print_testname("recursive read-lock");
|
|
251394098
locking/selftest:...
|
1852 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1853 |
dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
1854 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1855 |
dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
1856 1857 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1858 1859 |
print_testname("recursive read-lock #2");
|
|
251394098
locking/selftest:...
|
1860 |
pr_cont(" |");
|
|
6c9076ec9
[PATCH] lockdep: ...
|
1861 |
dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
1862 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1863 |
dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
1864 1865 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1866 1867 |
print_testname("mixed read-write-lock");
|
|
251394098
locking/selftest:...
|
1868 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1869 |
dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
1870 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1871 |
dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
1872 1873 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1874 1875 |
print_testname("mixed write-read-lock");
|
|
251394098
locking/selftest:...
|
1876 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1877 |
dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
1878 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1879 |
dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
1880 1881 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 |
printk(" --------------------------------------------------------------------------
");
/*
* irq-context testcases:
*/
DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
// DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2);
|
|
1de994452
mutex: Add w/w te...
|
1898 |
ww_tests(); |
|
cae2ed9aa
[PATCH] lockdep: ...
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if (unexpected_testcase_failures) {
printk("-----------------------------------------------------------------
");
debug_locks = 0;
printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |
",
unexpected_testcase_failures, testcase_total);
printk("-----------------------------------------------------------------
");
} else if (expected_testcase_failures && testcase_successes) {
printk("--------------------------------------------------------
");
printk("%3d out of %3d testcases failed, as expected. |
",
expected_testcase_failures, testcase_total);
printk("----------------------------------------------------
");
debug_locks = 1;
} else if (expected_testcase_failures && !testcase_successes) {
printk("--------------------------------------------------------
");
printk("All %3d testcases failed, as expected. |
",
expected_testcase_failures);
printk("----------------------------------------
");
debug_locks = 1;
} else {
printk("-------------------------------------------------------
");
printk("Good, all %3d testcases passed! |
",
testcase_successes);
printk("---------------------------------
");
debug_locks = 1;
}
debug_locks_silent = 0;
}
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