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lockdep/lib/tests: Test dynamic key registration

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Make sure that the lockdep_register_key() and lockdep_unregister_key()
code is tested when running the lockdep tests.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: johannes.berg@intel.com
Cc: tj@kernel.org
Link: https://lkml.kernel.org/r/20190214230058.196511-24-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Bart Van Assche 2019-02-14 15:00:58 -08:00 committed by Ingo Molnar
parent d93ac78bf7
commit f214737b75
3 changed files with 17 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/lib/lockdep/include/liblockdep/common.h
View File

@ -45,6 +45,8 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip);
void lockdep_reset_lock(struct lockdep_map *lock);
void lockdep_register_key(struct lock_class_key *key);
void lockdep_unregister_key(struct lock_class_key *key);
extern void debug_check_no_locks_freed(const void *from, unsigned long len);
#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \

11
tools/lib/lockdep/include/liblockdep/mutex.h
View File

@ -7,6 +7,7 @@
struct liblockdep_pthread_mutex {
pthread_mutex_t mutex;
struct lock_class_key key;
struct lockdep_map dep_map;
};
@ -27,11 +28,10 @@ static inline int __mutex_init(liblockdep_pthread_mutex_t *lock,
return pthread_mutex_init(&lock->mutex, __mutexattr);
}
#define liblockdep_pthread_mutex_init(mutex, mutexattr) \
({ \
static struct lock_class_key __key; \
\
__mutex_init((mutex), #mutex, &__key, (mutexattr)); \
#define liblockdep_pthread_mutex_init(mutex, mutexattr) \
({ \
lockdep_register_key(&(mutex)->key); \
__mutex_init((mutex), #mutex, &(mutex)->key, (mutexattr)); \
})
static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock)
@ -55,6 +55,7 @@ static inline int liblockdep_pthread_mutex_trylock(liblockdep_pthread_mutex_t *l
static inline int liblockdep_pthread_mutex_destroy(liblockdep_pthread_mutex_t *lock)
{
lockdep_reset_lock(&lock->dep_map);
lockdep_unregister_key(&lock->key);
return pthread_mutex_destroy(&lock->mutex);
}

9
tools/lib/lockdep/tests/ABBA.c
View File

@ -14,4 +14,13 @@ void main(void)
pthread_mutex_destroy(&b);
pthread_mutex_destroy(&a);
pthread_mutex_init(&a, NULL);
pthread_mutex_init(&b, NULL);
LOCK_UNLOCK_2(a, b);
LOCK_UNLOCK_2(b, a);
pthread_mutex_destroy(&b);
pthread_mutex_destroy(&a);
}