a772047bc6
signals were changed in kernel, it will retrieve the pending set and try to find a thread to dispatch the signal. The dispatching process can be rolled back if the signal is no longer in kernel. o Create two functions _thr_signal_init() and _thr_signal_deinit(), all signal action settings are retrieved from kernel when threading mode is turned on, after a fork(), child process will reset them to user settings by calling _thr_signal_deinit(). when threading mode is not turned on, all signal operations are direct past to kernel. o When a thread generated a synchoronous signals and its context returned from completed list, UTS will retrieve the signal from its mailbox and try to deliver the signal to thread. o Context signal mask is now only used when delivering signals, thread's current signal mask is always the one in pthread structure. o Remove have_signals field in pthread structure, replace it with psf_valid in pthread_signal_frame. when psf_valid is true, in context switch time, thread will backout itself from some mutex/condition internal queues, then begin to process signals. when a thread is not at blocked state and running, check_pending indicates there are signals for the thread, after preempted and then resumed time, UTS will try to deliver signals to the thread. o At signal delivering time, not only pending signals in thread will be scanned, process's pending signals will be scanned too. o Change sigwait code a bit, remove field sigwait in pthread_wait_data, replace it with oldsigmask in pthread structure, when a thread calls sigwait(), its current signal mask is backuped to oldsigmask, and waitset is copied to its signal mask and when the thread gets a signal in the waitset range, its current signal mask is restored from oldsigmask, these are done in atomic fashion. o Two additional POSIX APIs are implemented, sigwaitinfo() and sigtimedwait(). o Signal code locking is better than previous, there is fewer race conditions. o Temporary disable most of code in _kse_single_thread as it is not safe after fork().
301 lines
6.0 KiB
Plaintext
301 lines
6.0 KiB
Plaintext
# $FreeBSD$
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LIBTHREAD_1_0 {
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global:
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___creat;
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__close;
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__error;
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__fcntl;
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__fsync;
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__msync;
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__nanosleep;
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__open;
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__poll;
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__pthread_cond_timedwait;
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__pthread_cond_wait;
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__pthread_mutex_lock;
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__pthread_mutex_trylock;
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__read;
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__readv;
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__select;
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__sigsuspend;
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__wait4;
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__write;
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__writev;
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_aio_suspend;
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_fork;
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_nanosleep;
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_pause;
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_pselect;
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_pthread_attr_default;
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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_default;
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_pthread_condattr_destroy;
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_pthread_condattr_init;
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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_trylock;
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_pthread_mutex_unlock;
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_pthread_mutexattr_default;
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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_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_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_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_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_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_yield;
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_sched_yield;
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_sem_close;
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_sem_destroy;
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_sem_getvalue;
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_sem_init;
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_sem_open;
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_sem_post;
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_sem_trywait;
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_sem_unlink;
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_sem_wait;
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_sigaction;
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_sigpending;
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_sigprocmask;
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_sigsuspend;
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_sigwait;
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_sigtimedwait;
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_sigwaitinfo;
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_sleep;
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_spinlock;
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_spinlock_debug;
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_spinunlock;
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_system;
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_tcdrain;
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_vfork;
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_wait;
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_waitpid;
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aio_suspend;
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close;
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creat;
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fcntl;
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fork;
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fsync;
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msync;
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nanosleep;
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open;
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pause;
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poll;
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pselect;
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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_init;
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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_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_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_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_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_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_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_yield;
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read;
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readv;
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sched_yield;
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select;
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sem_close;
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sem_destroy;
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sem_getvalue;
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sem_init;
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sem_open;
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sem_post;
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sem_trywait;
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sem_unlink;
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sem_wait;
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sigaction;
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sigpending;
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sigprocmask;
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sigsuspend;
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sigwait;
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sigwaitinfo;
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sigtimedwait;
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sleep;
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system;
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tcdrain;
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vfork;
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wait;
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wait4;
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waitpid;
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write;
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writev;
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# Debugger needs these.
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_thread_list;
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_thread_next_offset;
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_thread_uniqueid_offset;
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_thread_state_offset;
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_thread_name_offset;
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_thread_ctx_offset;
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_thread_PS_RUNNING_value;
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_thread_PS_DEAD_value;
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local:
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*;
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};
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