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author | Sasha Levin <sasha.levin@oracle.com> | 2013-06-13 18:41:18 -0400 |
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committer | Ingo Molnar <mingo@kernel.org> | 2013-11-27 11:55:22 +0100 |
commit | 45e6207464b59dca63c8a9a79a7befbbf6a68fdb (patch) | |
tree | 7de006920165d94903ebb05d0566d9d4a1a6502d /tools/lib | |
parent | 5634bd7d2ab14fbf736b62b0788fb68e2cb0fde2 (diff) | |
download | op-kernel-dev-45e6207464b59dca63c8a9a79a7befbbf6a68fdb.zip op-kernel-dev-45e6207464b59dca63c8a9a79a7befbbf6a68fdb.tar.gz |
liblockdep: Add public headers for pthread_mutex_t implementation
These headers provide the same API as their pthread mutex
counterparts.
The design here is to allow to easily switch to liblockdep lock
validation just by adding a "liblockdep_" to pthread_mutex_*()
calls, which means that it's easy to integrate liblockdep into
existing codebases.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-4-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/lib')
-rw-r--r-- | tools/lib/lockdep/include/liblockdep/common.h | 50 | ||||
-rw-r--r-- | tools/lib/lockdep/include/liblockdep/mutex.h | 70 |
2 files changed, 120 insertions, 0 deletions
diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h new file mode 100644 index 0000000..0bda630 --- /dev/null +++ b/tools/lib/lockdep/include/liblockdep/common.h @@ -0,0 +1,50 @@ +#ifndef _LIBLOCKDEP_COMMON_H +#define _LIBLOCKDEP_COMMON_H + +#include <pthread.h> + +#define NR_LOCKDEP_CACHING_CLASSES 2 +#define MAX_LOCKDEP_SUBCLASSES 8UL + +#ifndef CALLER_ADDR0 +#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) +#endif + +#ifndef _RET_IP_ +#define _RET_IP_ CALLER_ADDR0 +#endif + +#ifndef _THIS_IP_ +#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) +#endif + +struct lockdep_subclass_key { + char __one_byte; +}; + +struct lock_class_key { + struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES]; +}; + +struct lockdep_map { + struct lock_class_key *key; + struct lock_class *class_cache[NR_LOCKDEP_CACHING_CLASSES]; + const char *name; +#ifdef CONFIG_LOCK_STAT + int cpu; + unsigned long ip; +#endif +}; + +void lockdep_init_map(struct lockdep_map *lock, const char *name, + struct lock_class_key *key, int subclass); +void lock_acquire(struct lockdep_map *lock, unsigned int subclass, + int trylock, int read, int check, + struct lockdep_map *nest_lock, unsigned long ip); +void lock_release(struct lockdep_map *lock, int nested, + unsigned long ip); + +#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \ + { .name = (_name), .key = (void *)(_key), } + +#endif diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h new file mode 100644 index 0000000..c342f70 --- /dev/null +++ b/tools/lib/lockdep/include/liblockdep/mutex.h @@ -0,0 +1,70 @@ +#ifndef _LIBLOCKDEP_MUTEX_H +#define _LIBLOCKDEP_MUTEX_H + +#include <pthread.h> +#include "common.h" + +struct liblockdep_pthread_mutex { + pthread_mutex_t mutex; + struct lockdep_map dep_map; +}; + +typedef struct liblockdep_pthread_mutex liblockdep_pthread_mutex_t; + +#define LIBLOCKDEP_PTHREAD_MUTEX_INITIALIZER(mtx) \ + (const struct liblockdep_pthread_mutex) { \ + .mutex = PTHREAD_MUTEX_INITIALIZER, \ + .dep_map = STATIC_LOCKDEP_MAP_INIT(#mtx, &((&(mtx))->dep_map)), \ +} + +static inline int __mutex_init(liblockdep_pthread_mutex_t *lock, + const char *name, + struct lock_class_key *key, + const pthread_mutexattr_t *__mutexattr) +{ + lockdep_init_map(&lock->dep_map, name, key, 0); + 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)); \ +}) + +static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock) +{ + lock_acquire(&lock->dep_map, 0, 0, 0, 2, NULL, (unsigned long)_RET_IP_); + return pthread_mutex_lock(&lock->mutex); +} + +static inline int liblockdep_pthread_mutex_unlock(liblockdep_pthread_mutex_t *lock) +{ + lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_); + return pthread_mutex_unlock(&lock->mutex); +} + +static inline int liblockdep_pthread_mutex_trylock(liblockdep_pthread_mutex_t *lock) +{ + lock_acquire(&lock->dep_map, 0, 1, 0, 2, NULL, (unsigned long)_RET_IP_); + return pthread_mutex_trylock(&lock->mutex) == 0 ? 1 : 0; +} + +static inline int liblockdep_pthread_mutex_destroy(liblockdep_pthread_mutex_t *lock) +{ + return pthread_mutex_destroy(&lock->mutex); +} + +#ifdef __USE_LIBLOCKDEP + +#define pthread_mutex_t liblockdep_pthread_mutex_t +#define pthread_mutex_init liblockdep_pthread_mutex_init +#define pthread_mutex_lock liblockdep_pthread_mutex_lock +#define pthread_mutex_unlock liblockdep_pthread_mutex_unlock +#define pthread_mutex_trylock liblockdep_pthread_mutex_trylock +#define pthread_mutex_destroy liblockdep_pthread_mutex_destroy + +#endif + +#endif |