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lib/locking-selftest.c
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// SPDX-License-Identifier: GPL-2.0 |
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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> |
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#include <linux/rtmutex.h> |
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/* * Change this to 1 if you want to see the failure printouts: */ static unsigned int debug_locks_verbose; |
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unsigned int force_read_lock_recursive; |
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static DEFINE_WD_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 |
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#define LOCKTYPE_RTMUTEX 0x20 |
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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); |
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#ifdef CONFIG_RT_MUTEXES static DEFINE_RT_MUTEX(rtmutex_A); static DEFINE_RT_MUTEX(rtmutex_B); static DEFINE_RT_MUTEX(rtmutex_C); static DEFINE_RT_MUTEX(rtmutex_D); #endif |
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/* * 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); |
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#ifdef CONFIG_RT_MUTEXES static DEFINE_RT_MUTEX(rtmutex_X1); static DEFINE_RT_MUTEX(rtmutex_X2); static DEFINE_RT_MUTEX(rtmutex_Y1); static DEFINE_RT_MUTEX(rtmutex_Y2); static DEFINE_RT_MUTEX(rtmutex_Z1); static DEFINE_RT_MUTEX(rtmutex_Z2); #endif |
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/* * 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)
{
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#ifdef CONFIG_RT_MUTEXES static struct lock_class_key rt_X, rt_Y, rt_Z; __rt_mutex_init(&rtmutex_X1, __func__, &rt_X); __rt_mutex_init(&rtmutex_X2, __func__, &rt_X); __rt_mutex_init(&rtmutex_Y1, __func__, &rt_Y); __rt_mutex_init(&rtmutex_Y2, __func__, &rt_Y); __rt_mutex_init(&rtmutex_Z1, __func__, &rt_Z); __rt_mutex_init(&rtmutex_Z2, __func__, &rt_Z); #endif |
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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) |
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#define RTL(x) rt_mutex_lock(&rtmutex_##x) #define RTU(x) rt_mutex_unlock(&rtmutex_##x) #define RTI(x) rt_mutex_init(&rtmutex_##x) |
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#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)
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#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(AA_rtmutex); #endif |
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#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
}
/*
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* read_lock(A)
* spin_lock(B)
* spin_lock(B)
* write_lock(A)
*/
static void rlock_ABBA1(void)
{
RL(X1);
L(Y1);
U(Y1);
RU(X1);
L(Y1);
WL(X1);
WU(X1);
U(Y1); // should fail
}
static void rwsem_ABBA1(void)
{
RSL(X1);
ML(Y1);
MU(Y1);
RSU(X1);
ML(Y1);
WSL(X1);
WSU(X1);
MU(Y1); // should fail
}
/*
* read_lock(A)
* spin_lock(B)
* spin_lock(B)
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* write_lock(A)
*
* This test case is aimed at poking whether the chain cache prevents us from
* detecting a read-lock/lock-write deadlock: if the chain cache doesn't differ
* read/write locks, the following case may happen
*
* { read_lock(A)->lock(B) dependency exists }
*
* P0:
* lock(B);
* read_lock(A);
*
* { Not a deadlock, B -> A is added in the chain cache }
*
* P1:
* lock(B);
* write_lock(A);
*
* { B->A found in chain cache, not reported as a deadlock }
*
*/
static void rlock_chaincache_ABBA1(void)
{
RL(X1);
L(Y1);
U(Y1);
RU(X1);
L(Y1);
RL(X1);
RU(X1);
U(Y1);
L(Y1);
WL(X1);
WU(X1);
U(Y1); // should fail
}
/*
* read_lock(A)
* spin_lock(B)
* spin_lock(B)
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* read_lock(A)
*/
static void rlock_ABBA2(void)
{
RL(X1);
L(Y1);
U(Y1);
RU(X1);
L(Y1);
RL(X1);
RU(X1);
U(Y1); // should NOT fail
}
static void rwsem_ABBA2(void)
{
RSL(X1);
ML(Y1);
MU(Y1);
RSU(X1);
ML(Y1);
RSL(X1);
RSU(X1);
MU(Y1); // should fail
}
/*
* write_lock(A)
* spin_lock(B)
* spin_lock(B)
* write_lock(A)
*/
static void rlock_ABBA3(void)
{
WL(X1);
L(Y1);
U(Y1);
WU(X1);
L(Y1);
WL(X1);
WU(X1);
U(Y1); // should fail
}
static void rwsem_ABBA3(void)
{
WSL(X1);
ML(Y1);
MU(Y1);
WSU(X1);
ML(Y1);
WSL(X1);
WSU(X1);
MU(Y1); // should fail
}
/*
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* 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) |
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#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(ABBA_rtmutex); #endif |
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#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) |
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#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(ABBCCA_rtmutex); #endif |
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#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) |
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#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(ABCABC_rtmutex); #endif |
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#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) |
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#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(ABBCCDDA_rtmutex); #endif |
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#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) |
|
018956d64
locking/selftest:...
|
644 645 646 647 |
#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(ABCDBDDA_rtmutex); #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 |
#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) |
|
018956d64
locking/selftest:...
|
675 676 677 678 |
#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(ABCDBCDA_rtmutex); #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 |
#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) |
|
018956d64
locking/selftest:...
|
705 706 707 708 |
#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(double_unlock_rtmutex); #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
709 710 711 |
#undef E /* |
|
cae2ed9aa
[PATCH] lockdep: ...
|
712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 |
* 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) |
|
018956d64
locking/selftest:...
|
734 735 736 737 |
#ifdef CONFIG_RT_MUTEXES #include "locking-selftest-rtmutex.h" GENERATE_TESTCASE(init_held_rtmutex); #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 |
#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 /* |
|
8ef7ca751
lockdep/selftest:...
|
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 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 1134 1135 1136 |
* write-read / write-read / write-read deadlock even if read is recursive */ #define E1() \ \ WL(X1); \ RL(Y1); \ RU(Y1); \ WU(X1); #define E2() \ \ WL(Y1); \ RL(Z1); \ RU(Z1); \ WU(Y1); #define E3() \ \ WL(Z1); \ RL(X1); \ RU(X1); \ WU(Z1); #include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(W1R2_W2R3_W3R1) #undef E1 #undef E2 #undef E3 /* * write-write / read-read / write-read deadlock even if read is recursive */ #define E1() \ \ WL(X1); \ WL(Y1); \ WU(Y1); \ WU(X1); #define E2() \ \ RL(Y1); \ RL(Z1); \ RU(Z1); \ RU(Y1); #define E3() \ \ WL(Z1); \ RL(X1); \ RU(X1); \ WU(Z1); #include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(W1W2_R2R3_W3R1) #undef E1 #undef E2 #undef E3 /* * write-write / read-read / read-write is not deadlock when read is recursive */ #define E1() \ \ WL(X1); \ WL(Y1); \ WU(Y1); \ WU(X1); #define E2() \ \ RL(Y1); \ RL(Z1); \ RU(Z1); \ RU(Y1); #define E3() \ \ RL(Z1); \ WL(X1); \ WU(X1); \ RU(Z1); #include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(W1R2_R2R3_W3W1) #undef E1 #undef E2 #undef E3 /* * write-read / read-read / write-write is not deadlock when read is recursive */ #define E1() \ \ WL(X1); \ RL(Y1); \ RU(Y1); \ WU(X1); #define E2() \ \ RL(Y1); \ RL(Z1); \ RU(Z1); \ RU(Y1); #define E3() \ \ WL(Z1); \ WL(X1); \ WU(X1); \ WU(Z1); #include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(W1W2_R2R3_R3W1) #undef E1 #undef E2 #undef E3 /* |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 |
* 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(); \ |
|
31e0d7477
lockdep/selftest:...
|
1155 |
LOCK(A); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1156 1157 |
L(B); \ U(B); \ |
|
31e0d7477
lockdep/selftest:...
|
1158 |
UNLOCK(A); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1159 1160 1161 |
IRQ_EXIT(); /* |
|
31e0d7477
lockdep/selftest:...
|
1162 |
* Generate 24 testcases: |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1163 1164 |
*/ #include "locking-selftest-hardirq.h" |
|
31e0d7477
lockdep/selftest:...
|
1165 1166 1167 1168 1169 |
#include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_rlock) #include "locking-selftest-wlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard_wlock) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1170 1171 |
#include "locking-selftest-softirq.h" |
|
31e0d7477
lockdep/selftest:...
|
1172 1173 1174 1175 1176 |
#include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_rlock) #include "locking-selftest-wlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft_wlock) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 |
#undef E1 #undef E2 #undef E3 /* * read-lock / write-lock recursion that is unsafe. */ #define E1() \ \ IRQ_DISABLE(); \ L(B); \ |
|
31e0d7477
lockdep/selftest:...
|
1190 1191 |
LOCK(A); \ UNLOCK(A); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 |
U(B); \ IRQ_ENABLE(); #define E2() \ \ RL(A); \ RU(A); \ #define E3() \ \ IRQ_ENTER(); \ L(B); \ U(B); \ IRQ_EXIT(); /* |
|
31e0d7477
lockdep/selftest:...
|
1208 |
* Generate 24 testcases: |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1209 1210 |
*/ #include "locking-selftest-hardirq.h" |
|
31e0d7477
lockdep/selftest:...
|
1211 1212 1213 1214 1215 |
#include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_rlock) #include "locking-selftest-wlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard_wlock) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1216 1217 |
#include "locking-selftest-softirq.h" |
|
31e0d7477
lockdep/selftest:...
|
1218 1219 1220 1221 1222 |
#include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_rlock) #include "locking-selftest-wlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_wlock) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1223 |
|
|
96a16f45a
lockdep/selftest:...
|
1224 1225 1226 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 |
#undef E1 #undef E2 #undef E3 /* * read-lock / write-lock recursion that is unsafe. * * A is a ENABLED_*_READ lock * B is a USED_IN_*_READ lock * * read_lock(A); * write_lock(B); * <interrupt> * read_lock(B); * write_lock(A); // if this one is read_lock(), no deadlock */ #define E1() \ \ IRQ_DISABLE(); \ WL(B); \ LOCK(A); \ UNLOCK(A); \ WU(B); \ IRQ_ENABLE(); #define E2() \ \ RL(A); \ RU(A); \ #define E3() \ \ IRQ_ENTER(); \ RL(B); \ RU(B); \ IRQ_EXIT(); /* * Generate 24 testcases: */ #include "locking-selftest-hardirq.h" #include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_hard_rlock) #include "locking-selftest-wlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_hard_wlock) #include "locking-selftest-softirq.h" #include "locking-selftest-rlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_soft_rlock) #include "locking-selftest-wlock.h" GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_soft_wlock) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1277 1278 1279 1280 1281 |
#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...
|
1282 |
# define I_WW(x) lockdep_reset_lock(&x.dep_map) |
|
018956d64
locking/selftest:...
|
1283 1284 1285 |
#ifdef CONFIG_RT_MUTEXES # define I_RTMUTEX(x) lockdep_reset_lock(&rtmutex_##x.dep_map) #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1286 1287 1288 1289 1290 |
#else # define I_SPINLOCK(x) # define I_RWLOCK(x) # define I_MUTEX(x) # define I_RWSEM(x) |
|
1de994452
mutex: Add w/w te...
|
1291 |
# define I_WW(x) |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1292 |
#endif |
|
018956d64
locking/selftest:...
|
1293 1294 1295 1296 1297 1298 1299 1300 1301 |
#ifndef I_RTMUTEX # define I_RTMUTEX(x) #endif #ifdef CONFIG_RT_MUTEXES #define I2_RTMUTEX(x) rt_mutex_init(&rtmutex_##x) #else #define I2_RTMUTEX(x) #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1302 1303 1304 1305 1306 1307 |
#define I1(x) \
do { \
I_SPINLOCK(x); \
I_RWLOCK(x); \
I_MUTEX(x); \
I_RWSEM(x); \
|
|
018956d64
locking/selftest:...
|
1308 |
I_RTMUTEX(x); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1309 1310 1311 1312 |
} while (0)
#define I2(x) \
do { \
|
|
9fb1b90ce
lockdep: Selftest...
|
1313 |
raw_spin_lock_init(&lock_##x); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1314 1315 1316 |
rwlock_init(&rwlock_##x); \ mutex_init(&mutex_##x); \ init_rwsem(&rwsem_##x); \ |
|
018956d64
locking/selftest:...
|
1317 |
I2_RTMUTEX(x); \ |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1318 1319 1320 1321 1322 |
} while (0)
static void reset_locks(void)
{
local_irq_disable();
|
|
1de994452
mutex: Add w/w te...
|
1323 1324 |
lockdep_free_key_range(&ww_lockdep.acquire_key, 1); lockdep_free_key_range(&ww_lockdep.mutex_key, 1); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1325 1326 |
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...
|
1327 |
I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1328 1329 1330 |
lockdep_reset(); I2(A); I2(B); I2(C); I2(D); init_shared_classes(); |
|
1de994452
mutex: Add w/w te...
|
1331 |
|
|
f3cf139ef
mutex: Add more w...
|
1332 |
ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep); |
|
1de994452
mutex: Add w/w te...
|
1333 1334 1335 |
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: ...
|
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 |
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: ...
|
1349 1350 1351 1352 1353 1354 1355 1356 |
WARN_ON(irqs_disabled()); testcase_fn(); /* * Filter out expected failures: */ #ifndef CONFIG_PROVE_LOCKING |
|
166989e36
locking-selftests...
|
1357 |
if (expected == FAILURE && debug_locks) {
|
|
1de994452
mutex: Add w/w te...
|
1358 |
expected_testcase_failures++; |
251394098
locking/selftest:...
|
1359 |
pr_cont("failed|");
|
|
166989e36
locking-selftests...
|
1360 1361 1362 1363 |
}
else
#endif
if (debug_locks != expected) {
|
|
1de994452
mutex: Add w/w te...
|
1364 |
unexpected_testcase_failures++; |
|
251394098
locking/selftest:...
|
1365 |
pr_cont("FAILED|");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1366 1367 |
} else {
testcase_successes++;
|
|
251394098
locking/selftest:...
|
1368 |
pr_cont(" ok |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1369 1370 1371 1372 |
} testcase_total++; if (debug_locks_verbose) |
|
251394098
locking/selftest:...
|
1373 1374 |
pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d
",
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1375 1376 1377 1378 1379 |
lockclass_mask, debug_locks, expected); /* * Some tests (e.g. double-unlock) might corrupt the preemption * count, so restore it: */ |
|
4a2b4b222
sched: Introduce ...
|
1380 |
preempt_count_set(saved_preempt_count); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1381 1382 1383 1384 1385 1386 1387 1388 1389 |
#ifdef CONFIG_TRACE_IRQFLAGS if (softirq_count()) current->softirqs_enabled = 0; else current->softirqs_enabled = 1; #endif reset_locks(); } |
|
018956d64
locking/selftest:...
|
1390 1391 1392 1393 1394 |
#ifdef CONFIG_RT_MUTEXES #define dotest_rt(fn, e, m) dotest((fn), (e), (m)) #else #define dotest_rt(fn, e, m) #endif |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1395 1396 1397 1398 1399 1400 1401 1402 |
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:...
|
1403 1404 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1405 1406 1407 1408 |
#define DO_TESTCASE_1B(desc, name, nr) \ print_testname(desc"/"#nr); \ dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \ |
|
251394098
locking/selftest:...
|
1409 1410 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1411 |
|
|
8ef7ca751
lockdep/selftest:...
|
1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 |
#define DO_TESTCASE_1RR(desc, name, nr) \
print_testname(desc"/"#nr); \
pr_cont(" |"); \
dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
pr_cont("
");
#define DO_TESTCASE_1RRB(desc, name, nr) \
print_testname(desc"/"#nr); \
pr_cont(" |"); \
dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1425 1426 1427 1428 1429 |
#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:...
|
1430 1431 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1432 1433 1434 1435 1436 1437 |
#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:...
|
1438 1439 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1440 |
|
|
31e0d7477
lockdep/selftest:...
|
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 |
#define DO_TESTCASE_2RW(desc, name, nr) \
print_testname(desc"/"#nr); \
pr_cont(" |"); \
dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
pr_cont("
");
#define DO_TESTCASE_2x2RW(desc, name, nr) \
DO_TESTCASE_2RW("hard-"desc, name##_hard, nr) \
DO_TESTCASE_2RW("soft-"desc, name##_soft, nr) \
#define DO_TESTCASE_6x2x2RW(desc, name) \
DO_TESTCASE_2x2RW(desc, name, 123); \
DO_TESTCASE_2x2RW(desc, name, 132); \
DO_TESTCASE_2x2RW(desc, name, 213); \
DO_TESTCASE_2x2RW(desc, name, 231); \
DO_TESTCASE_2x2RW(desc, name, 312); \
DO_TESTCASE_2x2RW(desc, name, 321);
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1460 1461 1462 1463 1464 1465 1466 1467 |
#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); \ |
|
018956d64
locking/selftest:...
|
1468 |
dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
|
251394098
locking/selftest:...
|
1469 1470 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1471 1472 1473 1474 1475 1476 1477 1478 1479 |
#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); \ |
|
018956d64
locking/selftest:...
|
1480 |
dotest_rt(name##_rtmutex, SUCCESS, LOCKTYPE_RTMUTEX); \ |
|
251394098
locking/selftest:...
|
1481 1482 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 |
/* * '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); \ |
|
018956d64
locking/selftest:...
|
1495 |
dotest_rt(name##_rtmutex, FAILURE, LOCKTYPE_RTMUTEX); \ |
|
251394098
locking/selftest:...
|
1496 1497 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
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 |
#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);
|
|
8ef7ca751
lockdep/selftest:...
|
1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 |
#define DO_TESTCASE_6x1RR(desc, name) \ DO_TESTCASE_1RR(desc, name, 123); \ DO_TESTCASE_1RR(desc, name, 132); \ DO_TESTCASE_1RR(desc, name, 213); \ DO_TESTCASE_1RR(desc, name, 231); \ DO_TESTCASE_1RR(desc, name, 312); \ DO_TESTCASE_1RR(desc, name, 321); #define DO_TESTCASE_6x1RRB(desc, name) \ DO_TESTCASE_1RRB(desc, name, 123); \ DO_TESTCASE_1RRB(desc, name, 132); \ DO_TESTCASE_1RRB(desc, name, 213); \ DO_TESTCASE_1RRB(desc, name, 231); \ DO_TESTCASE_1RRB(desc, name, 312); \ DO_TESTCASE_1RRB(desc, name, 321); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 |
#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...
|
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 |
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...
|
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 |
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...
|
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 1726 1727 1728 |
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...
|
1729 1730 1731 1732 1733 1734 |
static void ww_test_edeadlk_normal(void)
{
int ret;
mutex_lock(&o2.base);
o2.ctx = &t2;
|
5facae4f3
locking/lockdep: ...
|
1735 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1760 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 |
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;
|
|
5facae4f3
locking/lockdep: ...
|
1787 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1811 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1836 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1857 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1878 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1879 1880 1881 |
o2.ctx = &t2; mutex_lock(&o3.base); |
|
5facae4f3
locking/lockdep: ...
|
1882 |
mutex_release(&o3.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1904 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1905 1906 1907 |
o2.ctx = &t2; mutex_lock(&o3.base); |
|
5facae4f3
locking/lockdep: ...
|
1908 |
mutex_release(&o3.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1929 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 |
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);
|
|
5facae4f3
locking/lockdep: ...
|
1954 |
mutex_release(&o2.base.dep_map, _THIS_IP_); |
|
f3cf139ef
mutex: Add more w...
|
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 |
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...
|
1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 |
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...
|
2160 |
dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW); |
|
1de994452
mutex: Add w/w te...
|
2161 |
dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW); |
|
251394098
locking/selftest:...
|
2162 2163 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2164 2165 2166 2167 |
print_testname("ww contexts mixing");
dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
2168 2169 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2170 2171 2172 2173 2174 2175 |
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:...
|
2176 2177 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2178 2179 2180 2181 2182 |
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:...
|
2183 2184 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2185 |
|
|
f3cf139ef
mutex: Add more w...
|
2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 |
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:...
|
2197 2198 |
pr_cont("
");
|
|
f3cf139ef
mutex: Add more w...
|
2199 |
|
|
1de994452
mutex: Add w/w te...
|
2200 2201 |
print_testname("spinlock nest unlocked");
dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
|
|
251394098
locking/selftest:...
|
2202 2203 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 |
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:...
|
2216 2217 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2218 2219 2220 2221 2222 |
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:...
|
2223 2224 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2225 2226 2227 2228 2229 |
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:...
|
2230 2231 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2232 2233 2234 2235 2236 |
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:...
|
2237 2238 |
pr_cont("
");
|
|
1de994452
mutex: Add w/w te...
|
2239 |
} |
|
cae2ed9aa
[PATCH] lockdep: ...
|
2240 |
|
|
ad56450db
locking/selftest:...
|
2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 |
/*
* <in hardirq handler>
* read_lock(&A);
* <hardirq disable>
* spin_lock(&B);
* spin_lock(&B);
* read_lock(&A);
*
* is a deadlock.
*/
static void queued_read_lock_hardirq_RE_Er(void)
{
HARDIRQ_ENTER();
read_lock(&rwlock_A);
LOCK(B);
UNLOCK(B);
read_unlock(&rwlock_A);
HARDIRQ_EXIT();
HARDIRQ_DISABLE();
LOCK(B);
read_lock(&rwlock_A);
read_unlock(&rwlock_A);
UNLOCK(B);
HARDIRQ_ENABLE();
}
/*
* <in hardirq handler>
* spin_lock(&B);
* <hardirq disable>
* read_lock(&A);
* read_lock(&A);
* spin_lock(&B);
*
* is not a deadlock.
*/
static void queued_read_lock_hardirq_ER_rE(void)
{
HARDIRQ_ENTER();
LOCK(B);
read_lock(&rwlock_A);
read_unlock(&rwlock_A);
UNLOCK(B);
HARDIRQ_EXIT();
HARDIRQ_DISABLE();
read_lock(&rwlock_A);
LOCK(B);
UNLOCK(B);
read_unlock(&rwlock_A);
HARDIRQ_ENABLE();
}
/*
* <hardirq disable>
* spin_lock(&B);
* read_lock(&A);
* <in hardirq handler>
* spin_lock(&B);
* read_lock(&A);
*
* is a deadlock. Because the two read_lock()s are both non-recursive readers.
*/
static void queued_read_lock_hardirq_inversion(void)
{
HARDIRQ_ENTER();
LOCK(B);
UNLOCK(B);
HARDIRQ_EXIT();
HARDIRQ_DISABLE();
LOCK(B);
read_lock(&rwlock_A);
read_unlock(&rwlock_A);
UNLOCK(B);
HARDIRQ_ENABLE();
read_lock(&rwlock_A);
read_unlock(&rwlock_A);
}
static void queued_read_lock_tests(void)
{
printk(" --------------------------------------------------------------------------
");
printk(" | queued read lock tests |
");
printk(" ---------------------------
");
print_testname("hardirq read-lock/lock-read");
dotest(queued_read_lock_hardirq_RE_Er, FAILURE, LOCKTYPE_RWLOCK);
pr_cont("
");
print_testname("hardirq lock-read/read-lock");
dotest(queued_read_lock_hardirq_ER_rE, SUCCESS, LOCKTYPE_RWLOCK);
pr_cont("
");
print_testname("hardirq inversion");
dotest(queued_read_lock_hardirq_inversion, FAILURE, LOCKTYPE_RWLOCK);
pr_cont("
");
}
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 |
void locking_selftest(void)
{
/*
* Got a locking failure before the selftest ran?
*/
if (!debug_locks) {
printk("----------------------------------
");
printk("| Locking API testsuite disabled |
");
printk("----------------------------------
");
return;
}
/*
|
|
e91818861
locking: More acc...
|
2364 2365 2366 2367 2368 |
* treats read_lock() as recursive read locks for testing purpose */ force_read_lock_recursive = 1; /* |
|
cae2ed9aa
[PATCH] lockdep: ...
|
2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 |
* 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;
|
cdc84d794
locking/lockdep: ...
|
2384 |
lockdep_set_selftest_task(current); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
2385 |
|
|
6c9076ec9
[PATCH] lockdep: ...
|
2386 |
DO_TESTCASE_6R("A-A deadlock", AA);
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2387 2388 2389 2390 2391 2392 2393 2394 |
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);
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2395 2396 2397 2398 |
printk(" --------------------------------------------------------------------------
");
print_testname("recursive read-lock");
|
|
251394098
locking/selftest:...
|
2399 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2400 |
dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
2401 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2402 |
dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
2403 2404 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2405 2406 |
print_testname("recursive read-lock #2");
|
|
251394098
locking/selftest:...
|
2407 |
pr_cont(" |");
|
|
6c9076ec9
[PATCH] lockdep: ...
|
2408 |
dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
2409 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2410 |
dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
2411 2412 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2413 2414 |
print_testname("mixed read-write-lock");
|
|
251394098
locking/selftest:...
|
2415 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2416 |
dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
2417 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2418 |
dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
2419 2420 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2421 2422 |
print_testname("mixed write-read-lock");
|
|
251394098
locking/selftest:...
|
2423 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2424 |
dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK); |
|
251394098
locking/selftest:...
|
2425 |
pr_cont(" |");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2426 |
dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM); |
|
251394098
locking/selftest:...
|
2427 2428 |
pr_cont("
");
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2429 |
|
|
e91498589
locking/lockdep/s...
|
2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 |
print_testname("mixed read-lock/lock-write ABBA");
pr_cont(" |");
dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
pr_cont(" |");
dotest(rwsem_ABBA1, FAILURE, LOCKTYPE_RWSEM);
print_testname("mixed read-lock/lock-read ABBA");
pr_cont(" |");
dotest(rlock_ABBA2, SUCCESS, LOCKTYPE_RWLOCK);
pr_cont(" |");
dotest(rwsem_ABBA2, FAILURE, LOCKTYPE_RWSEM);
print_testname("mixed write-lock/lock-write ABBA");
pr_cont(" |");
dotest(rlock_ABBA3, FAILURE, LOCKTYPE_RWLOCK);
pr_cont(" |");
dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM);
|
|
d4f200e57
lockdep/selftest:...
|
2447 2448 2449 |
print_testname("chain cached mixed R-L/L-W ABBA");
pr_cont(" |");
dotest(rlock_chaincache_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
|
|
8ef7ca751
lockdep/selftest:...
|
2450 2451 2452 2453 |
DO_TESTCASE_6x1RRB("rlock W1R2/W2R3/W3R1", W1R2_W2R3_W3R1);
DO_TESTCASE_6x1RRB("rlock W1W2/R2R3/W3R1", W1W2_R2R3_W3R1);
DO_TESTCASE_6x1RR("rlock W1W2/R2R3/R3W1", W1W2_R2R3_R3W1);
DO_TESTCASE_6x1RR("rlock W1R2/R2R3/W3W1", W1R2_R2R3_W3W1);
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 |
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);
|
|
31e0d7477
lockdep/selftest:...
|
2466 2467 |
DO_TESTCASE_6x2x2RW("irq read-recursion", irq_read_recursion);
DO_TESTCASE_6x2x2RW("irq read-recursion #2", irq_read_recursion2);
|
|
96a16f45a
lockdep/selftest:...
|
2468 |
DO_TESTCASE_6x2x2RW("irq read-recursion #3", irq_read_recursion3);
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2469 |
|
|
1de994452
mutex: Add w/w te...
|
2470 |
ww_tests(); |
|
e91818861
locking: More acc...
|
2471 2472 2473 2474 |
force_read_lock_recursive = 0; /* * queued_read_lock() specific test cases can be put here */ |
|
ad56450db
locking/selftest:...
|
2475 2476 |
if (IS_ENABLED(CONFIG_QUEUED_RWLOCKS)) queued_read_lock_tests(); |
|
e91818861
locking: More acc...
|
2477 |
|
|
cae2ed9aa
[PATCH] lockdep: ...
|
2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 |
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;
}
|
|
cdc84d794
locking/lockdep: ...
|
2515 |
lockdep_set_selftest_task(NULL); |
|
cae2ed9aa
[PATCH] lockdep: ...
|
2516 2517 |
debug_locks_silent = 0; } |