1. Don't override underscore version of aio_suspend(), system(),
wait(), waitpid() and usleep(), they are internal versions and should not be cancellation points. 2. Make wait3() as a cancellation point. 3. Move raise() and pause() into file thr_sig.c. 4. Add functions _sigsuspend, _sigwait, _sigtimedwait and _sigwaitinfo, remove SIGCANCEL bit in wait-set for those functions, the signal is used internally to implement thread cancellation.
This commit is contained in:
David Xu
parent
84fd82e86f
commit
05c3a5eab4
@ -2,7 +2,16 @@
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LIBTHREAD_1_0 {
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global:
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___creat;
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___pause;
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___pselect;
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___sleep;
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___system;
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___tcdrain;
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___usleep;
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___wait;
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___waitpid;
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__accept;
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__aio_suspend;
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__close;
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__connect;
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__error;
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@ -29,15 +38,11 @@ global:
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__sigtimedwait;
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__sigwait;
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__sigwaitinfo;
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__wait3;
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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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_execve;
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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_atfork;
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_pthread_barrier_destroy;
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_pthread_barrier_init;
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@ -169,16 +174,10 @@ global:
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_sigtimedwait;
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_sigwait;
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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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_usleep;
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_vfork;
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_wait;
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_waitpid;
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accept;
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aio_suspend;
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close;
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@ -338,6 +337,7 @@ global:
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usleep;
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vfork;
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wait;
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wait3;
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wait4;
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waitpid;
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write;
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@ -538,6 +538,7 @@ global:
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usleep;
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vfork;
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wait;
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wait3;
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wait4;
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waitpid;
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write;
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@ -553,7 +554,16 @@ local:
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FBSDprivate {
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global:
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___creat;
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___pause;
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___pselect;
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___sleep;
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___system;
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___tcdrain;
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___usleep;
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___wait;
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___waitpid;
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__accept;
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__aio_suspend;
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__close;
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__connect;
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__fcntl;
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@ -579,15 +589,11 @@ global:
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__sigtimedwait;
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__sigwait;
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__sigwaitinfo;
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__wait3;
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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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_execve;
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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_atfork;
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_pthread_barrier_destroy;
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_pthread_barrier_init;
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@ -719,16 +725,10 @@ global:
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_sigtimedwait;
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_sigwait;
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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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_usleep;
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_vfork;
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_wait;
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_waitpid;
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# Debugger needs these.
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_libthr_debug;
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@ -123,13 +123,8 @@ static void init_main_thread(struct pthread *thread);
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* All weak references used within libc should be in this table.
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* This is so that static libraries will work.
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*/
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STATIC_LIB_REQUIRE(_accept);
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STATIC_LIB_REQUIRE(_close);
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STATIC_LIB_REQUIRE(_connect);
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STATIC_LIB_REQUIRE(_fcntl);
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STATIC_LIB_REQUIRE(_fsync);
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STATIC_LIB_REQUIRE(_nanosleep);
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STATIC_LIB_REQUIRE(_open);
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STATIC_LIB_REQUIRE(_fork);
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STATIC_LIB_REQUIRE(_pthread_getspecific);
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STATIC_LIB_REQUIRE(_pthread_key_create);
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STATIC_LIB_REQUIRE(_pthread_key_delete);
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@ -143,20 +138,25 @@ STATIC_LIB_REQUIRE(_pthread_mutexattr_destroy);
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STATIC_LIB_REQUIRE(_pthread_mutexattr_settype);
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STATIC_LIB_REQUIRE(_pthread_once);
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STATIC_LIB_REQUIRE(_pthread_setspecific);
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STATIC_LIB_REQUIRE(_read);
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STATIC_LIB_REQUIRE(_readv);
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STATIC_LIB_REQUIRE(_recvfrom);
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STATIC_LIB_REQUIRE(_recvmsg);
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STATIC_LIB_REQUIRE(_select);
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STATIC_LIB_REQUIRE(_sendmsg);
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STATIC_LIB_REQUIRE(_sendto);
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STATIC_LIB_REQUIRE(_raise);
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STATIC_LIB_REQUIRE(_sem_destroy);
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STATIC_LIB_REQUIRE(_sem_getvalue);
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STATIC_LIB_REQUIRE(_sem_init);
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STATIC_LIB_REQUIRE(_sem_post);
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STATIC_LIB_REQUIRE(_sem_timedwait);
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STATIC_LIB_REQUIRE(_sem_trywait);
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STATIC_LIB_REQUIRE(_sem_wait);
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STATIC_LIB_REQUIRE(_sigaction);
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STATIC_LIB_REQUIRE(_sigprocmask);
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STATIC_LIB_REQUIRE(_sigsuspend);
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STATIC_LIB_REQUIRE(_sigtimedwait);
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STATIC_LIB_REQUIRE(_sigwait);
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STATIC_LIB_REQUIRE(_sigwaitinfo);
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STATIC_LIB_REQUIRE(_spinlock);
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STATIC_LIB_REQUIRE(_spinlock_debug);
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STATIC_LIB_REQUIRE(_spinunlock);
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STATIC_LIB_REQUIRE(_thread_init_hack);
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STATIC_LIB_REQUIRE(_wait4);
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STATIC_LIB_REQUIRE(_write);
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STATIC_LIB_REQUIRE(_writev);
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STATIC_LIB_REQUIRE(_vfork);
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/*
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* These are needed when linking statically. All references within
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@ -47,6 +47,9 @@
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#define DBG_MSG(x...)
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#endif
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extern int __pause(void);
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int ___pause(void);
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int _raise(int);
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int __sigtimedwait(const sigset_t *set, siginfo_t *info,
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const struct timespec * timeout);
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int __sigwaitinfo(const sigset_t *set, siginfo_t *info);
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@ -145,6 +148,36 @@ _thr_signal_deinit(void)
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{
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}
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__weak_reference(___pause, pause);
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int
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___pause(void)
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{
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struct pthread *curthread = _get_curthread();
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int oldcancel;
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int ret;
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oldcancel = _thr_cancel_enter(curthread);
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ret = __pause();
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_thr_cancel_leave(curthread, oldcancel);
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return ret;
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}
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__weak_reference(_raise, raise);
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int
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_raise(int sig)
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{
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int ret;
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if (!_thr_isthreaded())
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ret = kill(getpid(), sig);
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else
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ret = _thr_send_sig(_get_curthread(), sig);
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return (ret);
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}
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__weak_reference(_sigaction, sigaction);
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int
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@ -188,10 +221,29 @@ _pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
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return (0);
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}
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__weak_reference(_sigsuspend, sigsuspend);
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__weak_reference(__sigsuspend, sigsuspend);
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int
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_sigsuspend(const sigset_t * set)
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{
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sigset_t newset;
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const sigset_t *pset;
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int ret;
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if (SIGISMEMBER(*set, SIGCANCEL)) {
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newset = *set;
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SIGDELSET(newset, SIGCANCEL);
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pset = &newset;
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} else
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pset = set;
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ret = __sys_sigsuspend(pset);
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return (ret);
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}
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int
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__sigsuspend(const sigset_t * set)
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{
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struct pthread *curthread = _get_curthread();
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sigset_t newset;
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@ -217,6 +269,24 @@ __weak_reference(__sigwait, sigwait);
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__weak_reference(__sigtimedwait, sigtimedwait);
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__weak_reference(__sigwaitinfo, sigwaitinfo);
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int
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_sigtimedwait(const sigset_t *set, siginfo_t *info,
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const struct timespec * timeout)
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{
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sigset_t newset;
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const sigset_t *pset;
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int ret;
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if (SIGISMEMBER(*set, SIGCANCEL)) {
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newset = *set;
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SIGDELSET(newset, SIGCANCEL);
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pset = &newset;
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} else
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pset = set;
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ret = __sys_sigtimedwait(pset, info, timeout);
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return (ret);
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}
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int
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__sigtimedwait(const sigset_t *set, siginfo_t *info,
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const struct timespec * timeout)
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@ -239,6 +309,24 @@ __sigtimedwait(const sigset_t *set, siginfo_t *info,
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return (ret);
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}
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int
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_sigwaitinfo(const sigset_t *set, siginfo_t *info)
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{
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sigset_t newset;
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const sigset_t *pset;
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int ret;
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if (SIGISMEMBER(*set, SIGCANCEL)) {
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newset = *set;
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SIGDELSET(newset, SIGCANCEL);
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pset = &newset;
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} else
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pset = set;
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ret = __sys_sigwaitinfo(pset, info);
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return (ret);
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}
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int
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__sigwaitinfo(const sigset_t *set, siginfo_t *info)
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{
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@ -261,6 +349,24 @@ __sigwaitinfo(const sigset_t *set, siginfo_t *info)
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return (ret);
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}
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int
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_sigwait(const sigset_t *set, int *sig)
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{
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sigset_t newset;
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const sigset_t *pset;
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int ret;
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if (SIGISMEMBER(*set, SIGCANCEL)) {
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newset = *set;
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SIGDELSET(newset, SIGCANCEL);
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pset = &newset;
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} else
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pset = set;
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ret = __sys_sigwait(pset, sig);
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return (ret);
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}
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int
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__sigwait(const sigset_t *set, int *sig)
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{
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@ -93,7 +93,6 @@
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#include "thr_private.h"
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extern int __creat(const char *, mode_t);
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extern int __pause(void);
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extern int __pselect(int, fd_set *, fd_set *, fd_set *,
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const struct timespec *, const sigset_t *);
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extern unsigned __sleep(unsigned int);
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@ -122,7 +121,17 @@ extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *);
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extern ssize_t __sys_writev(int, const struct iovec *, int);
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int ___creat(const char *, mode_t);
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int ___pselect(int, fd_set *, fd_set *, fd_set *,
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const struct timespec *, const sigset_t *);
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unsigned ___sleep(unsigned);
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int ___system(const char *);
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int ___tcdrain(int);
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int ___usleep(useconds_t useconds);
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pid_t ___wait(int *);
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pid_t ___waitpid(pid_t, int *, int);
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int __accept(int, struct sockaddr *, socklen_t *);
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int __aio_suspend(const struct aiocb * const iocbs[], int,
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const struct timespec *);
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int __close(int);
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int __connect(int, const struct sockaddr *, socklen_t);
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int __fcntl(int, int,...);
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@ -139,21 +148,11 @@ int __select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
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ssize_t __sendmsg(int, const struct msghdr *, int);
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ssize_t __sendto(int, const void *, size_t, int,
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const struct sockaddr *, socklen_t);
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pid_t __wait3(int *, int, struct rusage *);
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pid_t __wait4(pid_t, int *, int, struct rusage *);
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ssize_t __write(int, const void *, size_t);
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ssize_t __writev(int, const struct iovec *, int);
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int _aio_suspend(const struct aiocb * const iocbs[], int,
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const struct timespec *);
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int _pause(void);
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int _pselect(int, fd_set *, fd_set *, fd_set *,
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const struct timespec *, const sigset_t *);
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int _raise(int);
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unsigned _sleep(unsigned);
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int _system(const char *);
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int _tcdrain(int);
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int _vfork(void);
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pid_t _wait(int *);
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__weak_reference(__accept, accept);
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@ -172,10 +171,10 @@ __accept(int s, struct sockaddr *addr, socklen_t *addrlen)
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return (ret);
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}
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__weak_reference(_aio_suspend, aio_suspend);
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__weak_reference(__aio_suspend, aio_suspend);
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int
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_aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
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__aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
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timespec *timeout)
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{
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struct pthread *curthread = _get_curthread();
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@ -349,22 +348,6 @@ __open(const char *path, int flags,...)
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return ret;
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}
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__weak_reference(_pause, pause);
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int
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_pause(void)
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{
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struct pthread *curthread = _get_curthread();
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int oldcancel;
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int ret;
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oldcancel = _thr_cancel_enter(curthread);
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ret = __pause();
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_thr_cancel_leave(curthread, oldcancel);
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return ret;
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}
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__weak_reference(__poll, poll);
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int
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@ -381,10 +364,10 @@ __poll(struct pollfd *fds, unsigned int nfds, int timeout)
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return ret;
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}
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__weak_reference(_pselect, pselect);
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__weak_reference(___pselect, pselect);
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int
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_pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask)
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{
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struct pthread *curthread = _get_curthread();
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@ -398,20 +381,6 @@ _pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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return (ret);
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}
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__weak_reference(_raise, raise);
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int
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_raise(int sig)
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{
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int ret;
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if (!_thr_isthreaded())
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ret = kill(getpid(), sig);
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else
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ret = _thr_send_sig(_get_curthread(), sig);
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return (ret);
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}
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__weak_reference(__read, read);
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ssize_t
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@ -522,10 +491,10 @@ __sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
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return (ret);
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}
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__weak_reference(_sleep, sleep);
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__weak_reference(___sleep, sleep);
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unsigned int
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_sleep(unsigned int seconds)
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___sleep(unsigned int seconds)
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{
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struct pthread *curthread = _get_curthread();
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int oldcancel;
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@ -538,10 +507,10 @@ _sleep(unsigned int seconds)
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return (ret);
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}
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__weak_reference(_system, system);
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__weak_reference(___system, system);
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int
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_system(const char *string)
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___system(const char *string)
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{
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struct pthread *curthread = _get_curthread();
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int oldcancel;
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@ -554,10 +523,10 @@ _system(const char *string)
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return ret;
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}
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__weak_reference(_tcdrain, tcdrain);
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__weak_reference(___tcdrain, tcdrain);
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int
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_tcdrain(int fd)
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___tcdrain(int fd)
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{
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struct pthread *curthread = _get_curthread();
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int oldcancel;
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@ -570,10 +539,10 @@ _tcdrain(int fd)
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return (ret);
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}
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__weak_reference(_usleep, usleep);
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__weak_reference(___usleep, usleep);
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int
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_usleep(useconds_t useconds)
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___usleep(useconds_t useconds)
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{
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struct pthread *curthread = _get_curthread();
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int oldcancel;
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@ -594,10 +563,10 @@ _vfork(void)
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return (fork());
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}
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__weak_reference(_wait, wait);
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__weak_reference(___wait, wait);
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pid_t
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_wait(int *istat)
|
||||
___wait(int *istat)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
int oldcancel;
|
||||
@ -610,26 +579,42 @@ _wait(int *istat)
|
||||
return ret;
|
||||
}
|
||||
|
||||
__weak_reference(__wait4, wait4);
|
||||
__weak_reference(__wait3, wait3);
|
||||
|
||||
pid_t
|
||||
__wait4(pid_t pid, int *istat, int options, struct rusage *rusage)
|
||||
__wait3(int *status, int options, struct rusage *rusage)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
int oldcancel;
|
||||
pid_t ret;
|
||||
|
||||
oldcancel = _thr_cancel_enter(curthread);
|
||||
ret = __sys_wait4(pid, istat, options, rusage);
|
||||
ret = _wait4(WAIT_ANY, status, options, rusage);
|
||||
_thr_cancel_leave(curthread, oldcancel);
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
__weak_reference(__wait4, wait4);
|
||||
|
||||
pid_t
|
||||
__wait4(pid_t pid, int *status, int options, struct rusage *rusage)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
int oldcancel;
|
||||
pid_t ret;
|
||||
|
||||
oldcancel = _thr_cancel_enter(curthread);
|
||||
ret = __sys_wait4(pid, status, options, rusage);
|
||||
_thr_cancel_leave(curthread, oldcancel);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
__weak_reference(_waitpid, waitpid);
|
||||
__weak_reference(___waitpid, waitpid);
|
||||
|
||||
pid_t
|
||||
_waitpid(pid_t wpid, int *status, int options)
|
||||
___waitpid(pid_t wpid, int *status, int options)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
int oldcancel;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user