2a339d9e3d
intention of the POSIX IEEE Std 1003.1TM-2008/Cor 1-2013. A robust mutex is guaranteed to be cleared by the system upon either thread or process owner termination while the mutex is held. The next mutex locker is then notified about inconsistent mutex state and can execute (or abandon) corrective actions. The patch mostly consists of small changes here and there, adding neccessary checks for the inconsistent and abandoned conditions into existing paths. Additionally, the thread exit handler was extended to iterate over the userspace-maintained list of owned robust mutexes, unlocking and marking as terminated each of them. The list of owned robust mutexes cannot be maintained atomically synchronous with the mutex lock state (it is possible in kernel, but is too expensive). Instead, for the duration of lock or unlock operation, the current mutex is remembered in a special slot that is also checked by the kernel at thread termination. Kernel must be aware about the per-thread location of the heads of robust mutex lists and the current active mutex slot. When a thread touches a robust mutex for the first time, a new umtx op syscall is issued which informs about location of lists heads. The umtx sleep queues for PP and PI mutexes are split between non-robust and robust. Somewhat unrelated changes in the patch: 1. Style. 2. The fix for proper tdfind() call use in umtxq_sleep_pi() for shared pi mutexes. 3. Removal of the userspace struct pthread_mutex m_owner field. 4. The sysctl kern.ipc.umtx_vnode_persistent is added, which controls the lifetime of the shared mutex associated with a vnode' page. Reviewed by: jilles (previous version, supposedly the objection was fixed) Discussed with: brooks, Martin Simmons <martin@lispworks.com> (some aspects) Tested by: pho Sponsored by: The FreeBSD Foundation
324 lines
7.6 KiB
Plaintext
324 lines
7.6 KiB
Plaintext
/*
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* $FreeBSD$
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*/
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/*
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* Use the same naming scheme as libc.
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*/
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FBSD_1.0 {
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pthread_atfork;
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pthread_barrier_destroy;
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pthread_barrier_init;
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pthread_barrier_wait;
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pthread_barrierattr_destroy;
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pthread_barrierattr_getpshared;
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pthread_barrierattr_init;
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pthread_barrierattr_setpshared;
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pthread_attr_destroy;
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pthread_attr_get_np;
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pthread_attr_getdetachstate;
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pthread_attr_getguardsize;
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pthread_attr_getinheritsched;
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pthread_attr_getschedparam;
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pthread_attr_getschedpolicy;
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pthread_attr_getscope;
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pthread_attr_getstack;
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pthread_attr_getstackaddr;
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pthread_attr_getstacksize;
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pthread_attr_init;
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pthread_attr_setcreatesuspend_np;
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pthread_attr_setdetachstate;
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pthread_attr_setguardsize;
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pthread_attr_setinheritsched;
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pthread_attr_setschedparam;
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pthread_attr_setschedpolicy;
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pthread_attr_setscope;
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pthread_attr_setstack;
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pthread_attr_setstackaddr;
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pthread_attr_setstacksize;
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pthread_cancel;
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pthread_cleanup_pop;
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pthread_cleanup_push;
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pthread_cond_broadcast;
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pthread_cond_destroy;
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pthread_cond_init;
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pthread_cond_signal;
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pthread_cond_timedwait;
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pthread_cond_wait;
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pthread_condattr_destroy;
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pthread_condattr_getclock;
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pthread_condattr_getpshared;
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pthread_condattr_init;
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pthread_condattr_setclock;
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pthread_condattr_setpshared;
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pthread_create;
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pthread_detach;
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pthread_equal;
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pthread_exit;
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pthread_getconcurrency;
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pthread_getprio;
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pthread_getschedparam;
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pthread_getspecific;
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pthread_join;
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pthread_key_create;
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pthread_key_delete;
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pthread_kill;
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pthread_main_np;
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pthread_multi_np;
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pthread_mutex_destroy;
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pthread_mutex_getprioceiling;
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pthread_mutex_init;
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pthread_mutex_lock;
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pthread_mutex_setprioceiling;
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pthread_mutex_timedlock;
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pthread_mutex_trylock;
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pthread_mutex_unlock;
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pthread_mutexattr_destroy;
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pthread_mutexattr_getkind_np;
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pthread_mutexattr_getprioceiling;
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pthread_mutexattr_getpshared;
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pthread_mutexattr_getprotocol;
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pthread_mutexattr_gettype;
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pthread_mutexattr_init;
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pthread_mutexattr_setkind_np;
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pthread_mutexattr_setprioceiling;
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pthread_mutexattr_setprotocol;
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pthread_mutexattr_setpshared;
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pthread_mutexattr_settype;
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pthread_once;
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pthread_resume_all_np;
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pthread_resume_np;
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pthread_rwlock_destroy;
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pthread_rwlock_init;
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pthread_rwlock_rdlock;
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pthread_rwlock_timedrdlock;
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pthread_rwlock_timedwrlock;
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pthread_rwlock_tryrdlock;
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pthread_rwlock_trywrlock;
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pthread_rwlock_unlock;
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pthread_rwlock_wrlock;
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pthread_rwlockattr_destroy;
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pthread_rwlockattr_getpshared;
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pthread_rwlockattr_init;
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pthread_rwlockattr_setpshared;
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pthread_set_name_np;
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pthread_self;
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pthread_setcancelstate;
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pthread_setcanceltype;
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pthread_setconcurrency;
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pthread_setprio;
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pthread_setschedparam;
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pthread_setspecific;
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pthread_sigmask;
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pthread_single_np;
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pthread_spin_destroy;
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pthread_spin_init;
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pthread_spin_lock;
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pthread_spin_trylock;
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pthread_spin_unlock;
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pthread_suspend_all_np;
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pthread_suspend_np;
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pthread_switch_add_np;
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pthread_switch_delete_np;
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pthread_testcancel;
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pthread_timedjoin_np;
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pthread_yield;
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};
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/*
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* List the private interfaces reserved for use in FreeBSD libraries.
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* These are not part of our application ABI.
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*/
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FBSDprivate_1.0 {
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__pthread_cond_timedwait;
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__pthread_cond_wait;
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__pthread_cxa_finalize;
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__pthread_mutex_init;
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__pthread_mutex_lock;
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__pthread_mutex_timedlock;
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__pthread_mutex_trylock;
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_pthread_atfork;
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_pthread_barrier_destroy;
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_pthread_barrier_init;
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_pthread_barrier_wait;
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_pthread_barrierattr_destroy;
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_pthread_barrierattr_getpshared;
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_pthread_barrierattr_init;
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_pthread_barrierattr_setpshared;
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_pthread_attr_destroy;
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_pthread_attr_get_np;
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_pthread_attr_getaffinity_np;
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_pthread_attr_getdetachstate;
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_pthread_attr_getguardsize;
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_pthread_attr_getinheritsched;
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_pthread_attr_getschedparam;
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_pthread_attr_getschedpolicy;
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_pthread_attr_getscope;
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_pthread_attr_getstack;
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_pthread_attr_getstackaddr;
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_pthread_attr_getstacksize;
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_pthread_attr_init;
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_pthread_attr_setaffinity_np;
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_pthread_attr_setcreatesuspend_np;
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_pthread_attr_setdetachstate;
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_pthread_attr_setguardsize;
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_pthread_attr_setinheritsched;
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_pthread_attr_setschedparam;
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_pthread_attr_setschedpolicy;
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_pthread_attr_setscope;
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_pthread_attr_setstack;
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_pthread_attr_setstackaddr;
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_pthread_attr_setstacksize;
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_pthread_cancel;
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_pthread_cancel_enter;
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_pthread_cancel_leave;
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_pthread_cleanup_pop;
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_pthread_cleanup_push;
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_pthread_cond_broadcast;
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_pthread_cond_destroy;
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_pthread_cond_init;
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_pthread_cond_signal;
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_pthread_cond_timedwait;
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_pthread_cond_wait;
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_pthread_condattr_destroy;
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_pthread_condattr_getclock;
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_pthread_condattr_getpshared;
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_pthread_condattr_init;
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_pthread_condattr_setclock;
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_pthread_condattr_setpshared;
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_pthread_create;
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_pthread_detach;
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_pthread_equal;
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_pthread_exit;
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_pthread_getaffinity_np;
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_pthread_getconcurrency;
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_pthread_getcpuclockid;
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_pthread_getprio;
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_pthread_getschedparam;
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_pthread_getspecific;
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_pthread_getthreadid_np;
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_pthread_join;
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_pthread_key_create;
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_pthread_key_delete;
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_pthread_kill;
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_pthread_main_np;
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_pthread_multi_np;
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_pthread_mutex_destroy;
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_pthread_mutex_getprioceiling;
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_pthread_mutex_getspinloops_np;
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_pthread_mutex_getyieldloops_np;
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_pthread_mutex_init;
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_pthread_mutex_init_calloc_cb;
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_pthread_mutex_isowned_np;
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_pthread_mutex_lock;
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_pthread_mutex_setprioceiling;
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_pthread_mutex_setspinloops_np;
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_pthread_mutex_setyieldloops_np;
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_pthread_mutex_timedlock;
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_pthread_mutex_trylock;
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_pthread_mutex_unlock;
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_pthread_mutexattr_destroy;
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_pthread_mutexattr_getkind_np;
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_pthread_mutexattr_getprioceiling;
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_pthread_mutexattr_getprotocol;
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_pthread_mutexattr_getpshared;
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_pthread_mutexattr_gettype;
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_pthread_mutexattr_init;
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_pthread_mutexattr_setkind_np;
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_pthread_mutexattr_setprioceiling;
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_pthread_mutexattr_setprotocol;
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_pthread_mutexattr_setpshared;
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_pthread_mutexattr_settype;
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_pthread_once;
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_pthread_resume_all_np;
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_pthread_resume_np;
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_pthread_rwlock_destroy;
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_pthread_rwlock_init;
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_pthread_rwlock_rdlock;
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_pthread_rwlock_timedrdlock;
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_pthread_rwlock_timedwrlock;
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_pthread_rwlock_tryrdlock;
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_pthread_rwlock_trywrlock;
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_pthread_rwlock_unlock;
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_pthread_rwlock_wrlock;
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_pthread_rwlockattr_destroy;
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_pthread_rwlockattr_getpshared;
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_pthread_rwlockattr_init;
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_pthread_rwlockattr_setpshared;
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_pthread_self;
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_pthread_set_name_np;
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_pthread_setaffinity_np;
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_pthread_setcancelstate;
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_pthread_setcanceltype;
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_pthread_setconcurrency;
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_pthread_setprio;
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_pthread_setschedparam;
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_pthread_setspecific;
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_pthread_sigmask;
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_pthread_single_np;
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_pthread_spin_destroy;
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_pthread_spin_init;
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_pthread_spin_lock;
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_pthread_spin_trylock;
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_pthread_spin_unlock;
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_pthread_suspend_all_np;
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_pthread_suspend_np;
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_pthread_switch_add_np;
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_pthread_switch_delete_np;
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_pthread_testcancel;
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_pthread_timedjoin_np;
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_pthread_yield;
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/* Debugger needs these. */
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_libthr_debug;
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_thread_active_threads;
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_thread_bp_create;
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_thread_bp_death;
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_thread_event_mask;
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_thread_keytable;
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_thread_last_event;
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_thread_list;
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_thread_max_keys;
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_thread_off_attr_flags;
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_thread_off_dtv;
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_thread_off_event_buf;
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_thread_off_event_mask;
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_thread_off_key_allocated;
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_thread_off_key_destructor;
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_thread_off_linkmap;
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_thread_off_next;
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_thread_off_report_events;
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_thread_off_state;
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_thread_off_tcb;
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_thread_off_tid;
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_thread_off_tlsindex;
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_thread_size_key;
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_thread_state_running;
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_thread_state_zoombie;
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};
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FBSD_1.1 {
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__pthread_cleanup_pop_imp;
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__pthread_cleanup_push_imp;
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pthread_attr_getaffinity_np;
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pthread_attr_setaffinity_np;
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pthread_getaffinity_np;
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pthread_getcpuclockid;
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pthread_setaffinity_np;
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pthread_mutex_getspinloops_np;
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pthread_mutex_getyieldloops_np;
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pthread_mutex_isowned_np;
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pthread_mutex_setspinloops_np;
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pthread_mutex_setyieldloops_np;
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};
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FBSD_1.2 {
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pthread_getthreadid_np;
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};
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FBSD_1.4 {
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pthread_mutex_consistent;
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pthread_mutexattr_getrobust;
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pthread_mutexattr_setrobust;
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};
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