Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754565Ab3EPDSR (ORCPT ); Wed, 15 May 2013 23:18:17 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:23494 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753978Ab3EPDQh (ORCPT ); Wed, 15 May 2013 23:16:37 -0400 From: Sasha Levin To: torvalds@linux-foundation.org Cc: mingo@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org, Sasha Levin Subject: [PATCH v4 3/9] liblockdep: Add public headers for pthread_mutex_t implementation Date: Wed, 15 May 2013 23:15:35 -0400 Message-Id: <1368674141-10796-4-git-send-email-sasha.levin@oracle.com> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1368674141-10796-1-git-send-email-sasha.levin@oracle.com> References: <1368674141-10796-1-git-send-email-sasha.levin@oracle.com> X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4615 Lines: 148 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 --- tools/lib/lockdep/include/liblockdep/common.h | 42 ++++++++++++++++ tools/lib/lockdep/include/liblockdep/mutex.h | 70 +++++++++++++++++++++++++++ 2 files changed, 112 insertions(+) create mode 100644 tools/lib/lockdep/include/liblockdep/common.h create mode 100644 tools/lib/lockdep/include/liblockdep/mutex.h diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h new file mode 100644 index 0000000..1113cad --- /dev/null +++ b/tools/lib/lockdep/include/liblockdep/common.h @@ -0,0 +1,42 @@ +#ifndef _LIBLOCKDEP_COMMON_H +#define _LIBLOCKDEP_COMMON_H + +#include + +#ifndef _THIS_IP_ +#define _RET_IP_ (unsigned long)__builtin_return_address(0) +#endif + +#define NR_LOCKDEP_CACHING_CLASSES 2 +#define MAX_LOCKDEP_SUBCLASSES 8UL + +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 +#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 -- 1.8.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/