c1e00ef2a6
b2c0d6322d (Add witness, a simple online
locking validator.) caused a broad propagation of tsd throughout the
internal API, but tsd_fetch() was designed to fail prior to tsd
bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and
nullable tsdn_t, and modifying all internal APIs that do not critically
rely on tsd to take nullable pointers. Furthermore, add the
tsd_booted_get() function so that tsdn_fetch() can probe whether tsd
bootstrapping is complete and return NULL if not. All dangerous
conversions of nullable pointers are tsdn_tsd() calls that assert-fail
on invalid conversion.
142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/******************************************************************************/
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#ifdef JEMALLOC_H_TYPES
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typedef struct malloc_mutex_s malloc_mutex_t;
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#ifdef _WIN32
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# define MALLOC_MUTEX_INITIALIZER
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#elif (defined(JEMALLOC_OSSPIN))
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# define MALLOC_MUTEX_INITIALIZER {0, WITNESS_INITIALIZER(WITNESS_RANK_OMIT)}
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#elif (defined(JEMALLOC_MUTEX_INIT_CB))
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# define MALLOC_MUTEX_INITIALIZER \
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{PTHREAD_MUTEX_INITIALIZER, NULL, WITNESS_INITIALIZER(WITNESS_RANK_OMIT)}
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#else
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# if (defined(JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP) && \
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defined(PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP))
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# define MALLOC_MUTEX_TYPE PTHREAD_MUTEX_ADAPTIVE_NP
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# define MALLOC_MUTEX_INITIALIZER \
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{PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP, \
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WITNESS_INITIALIZER(WITNESS_RANK_OMIT)}
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# else
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# define MALLOC_MUTEX_TYPE PTHREAD_MUTEX_DEFAULT
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# define MALLOC_MUTEX_INITIALIZER \
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{PTHREAD_MUTEX_INITIALIZER, WITNESS_INITIALIZER(WITNESS_RANK_OMIT)}
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# endif
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#endif
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#endif /* JEMALLOC_H_TYPES */
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/******************************************************************************/
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#ifdef JEMALLOC_H_STRUCTS
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struct malloc_mutex_s {
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#ifdef _WIN32
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# if _WIN32_WINNT >= 0x0600
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SRWLOCK lock;
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# else
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CRITICAL_SECTION lock;
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# endif
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#elif (defined(JEMALLOC_OSSPIN))
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OSSpinLock lock;
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#elif (defined(JEMALLOC_MUTEX_INIT_CB))
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pthread_mutex_t lock;
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malloc_mutex_t *postponed_next;
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#else
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pthread_mutex_t lock;
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#endif
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witness_t witness;
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};
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#endif /* JEMALLOC_H_STRUCTS */
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/******************************************************************************/
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#ifdef JEMALLOC_H_EXTERNS
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#ifdef JEMALLOC_LAZY_LOCK
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extern bool isthreaded;
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#else
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# undef isthreaded /* Undo private_namespace.h definition. */
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# define isthreaded true
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#endif
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bool malloc_mutex_init(malloc_mutex_t *mutex, const char *name,
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witness_rank_t rank);
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void malloc_mutex_prefork(tsdn_t *tsdn, malloc_mutex_t *mutex);
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void malloc_mutex_postfork_parent(tsdn_t *tsdn, malloc_mutex_t *mutex);
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void malloc_mutex_postfork_child(tsdn_t *tsdn, malloc_mutex_t *mutex);
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bool malloc_mutex_boot(void);
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#endif /* JEMALLOC_H_EXTERNS */
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/******************************************************************************/
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#ifdef JEMALLOC_H_INLINES
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#ifndef JEMALLOC_ENABLE_INLINE
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void malloc_mutex_lock(tsdn_t *tsdn, malloc_mutex_t *mutex);
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void malloc_mutex_unlock(tsdn_t *tsdn, malloc_mutex_t *mutex);
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void malloc_mutex_assert_owner(tsdn_t *tsdn, malloc_mutex_t *mutex);
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void malloc_mutex_assert_not_owner(tsdn_t *tsdn, malloc_mutex_t *mutex);
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#endif
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#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_MUTEX_C_))
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JEMALLOC_INLINE void
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malloc_mutex_lock(tsdn_t *tsdn, malloc_mutex_t *mutex)
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{
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if (isthreaded) {
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if (config_debug)
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witness_assert_not_owner(tsdn, &mutex->witness);
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#ifdef _WIN32
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# if _WIN32_WINNT >= 0x0600
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AcquireSRWLockExclusive(&mutex->lock);
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# else
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EnterCriticalSection(&mutex->lock);
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# endif
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#elif (defined(JEMALLOC_OSSPIN))
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OSSpinLockLock(&mutex->lock);
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#else
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pthread_mutex_lock(&mutex->lock);
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#endif
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if (config_debug)
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witness_lock(tsdn, &mutex->witness);
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}
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}
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JEMALLOC_INLINE void
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malloc_mutex_unlock(tsdn_t *tsdn, malloc_mutex_t *mutex)
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{
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if (isthreaded) {
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if (config_debug)
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witness_unlock(tsdn, &mutex->witness);
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#ifdef _WIN32
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# if _WIN32_WINNT >= 0x0600
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ReleaseSRWLockExclusive(&mutex->lock);
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# else
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LeaveCriticalSection(&mutex->lock);
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# endif
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#elif (defined(JEMALLOC_OSSPIN))
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OSSpinLockUnlock(&mutex->lock);
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#else
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pthread_mutex_unlock(&mutex->lock);
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#endif
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}
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}
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JEMALLOC_INLINE void
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malloc_mutex_assert_owner(tsdn_t *tsdn, malloc_mutex_t *mutex)
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{
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if (isthreaded && config_debug)
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witness_assert_owner(tsdn, &mutex->witness);
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}
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JEMALLOC_INLINE void
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malloc_mutex_assert_not_owner(tsdn_t *tsdn, malloc_mutex_t *mutex)
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{
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if (isthreaded && config_debug)
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witness_assert_not_owner(tsdn, &mutex->witness);
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}
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#endif
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#endif /* JEMALLOC_H_INLINES */
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/******************************************************************************/
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