o Eliminate upcall for PTHREAD_SYSTEM_SCOPE thread, now it
is system bound thread and when it is blocked, no upcall is generated. o Add ability to libkse to allow it run in pure 1:1 threading mode, defining SYSTEM_SCOPE_ONLY in Makefile can turn on this option. o Eliminate code for installing dummy signal handler for sigwait call. o Add hash table to find thread. Reviewed by: deischen
This commit is contained in:
parent
97d2d9dfed
commit
8cbb5ce673
@ -22,6 +22,10 @@ CFLAGS+=-fno-builtin
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CFLAGS+=-D_LOCK_DEBUG
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#CFLAGS+= -g
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# Uncomment this if you want to build a 1:1 threading mode library
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# however it is no longer strictly conformed to POSIX
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# CFLAGS+=-DSYSTEM_SCOPE_ONLY
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LDFLAGS= -Wl,--version-script=${.CURDIR}/pthread.map
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# enable extra internal consistancy checks
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@ -63,6 +63,8 @@ sigsuspender (void *arg)
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/* Allow these signals to wake us up during a sigsuspend. */
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sigfillset (&suspender_mask); /* Default action */
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sigdelset (&suspender_mask, SIGKILL); /* Cannot catch */
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sigdelset (&suspender_mask, SIGSTOP); /* Cannot catch */
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sigdelset (&suspender_mask, SIGINT); /* terminate */
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sigdelset (&suspender_mask, SIGHUP); /* terminate */
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sigdelset (&suspender_mask, SIGQUIT); /* create core image */
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@ -107,9 +107,11 @@ _pthread_cancel(pthread_t pthread)
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/* Ignore - only here to silence -Wall: */
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break;
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}
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if ((pthread->blocked != 0) &&
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((pthread->cancelflags & THR_AT_CANCEL_POINT) != 0))
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kse_thr_interrupt(&pthread->tmbx, -1);
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if ((pthread->cancelflags & THR_AT_CANCEL_POINT) &&
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(pthread->blocked != 0 ||
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pthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
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kse_thr_interrupt(&pthread->tmbx,
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KSE_INTR_INTERRUPT, 0);
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}
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/*
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@ -89,7 +89,7 @@ _thr_setconcurrency(int new_level)
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/* Race condition, but so what. */
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kse_count = _kse_initial->k_kseg->kg_ksecount;
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for (i = kse_count; i < new_level; i++) {
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newkse = _kse_alloc(curthread);
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newkse = _kse_alloc(curthread, 0);
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if (newkse == NULL) {
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DBG_MSG("Can't alloc new KSE.\n");
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ret = EAGAIN;
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@ -57,6 +57,7 @@ int _thread_PS_DEAD_value = PS_DEAD;
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static void free_thread(struct pthread *curthread, struct pthread *thread);
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static int create_stack(struct pthread_attr *pattr);
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static void free_stack(struct pthread_attr *pattr);
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static void thread_start(struct pthread *curthread,
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void *(*start_routine) (void *), void *arg);
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@ -91,7 +92,6 @@ int
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_pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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void *(*start_routine) (void *), void *arg)
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{
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struct kse *curkse;
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struct pthread *curthread, *new_thread;
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struct kse *kse = NULL;
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struct kse_group *kseg = NULL;
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@ -132,14 +132,16 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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new_thread->attr = _pthread_attr_default;
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else
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new_thread->attr = *(*attr);
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#ifdef SYSTEM_SCOPE_ONLY
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new_thread->attr.flags |= PTHREAD_SCOPE_SYSTEM;
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#endif
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if (create_stack(&new_thread->attr) != 0) {
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/* Insufficient memory to create a stack: */
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ret = EAGAIN;
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_thr_free(curthread, new_thread);
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}
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else if (((new_thread->attr.flags & PTHREAD_SCOPE_SYSTEM) != 0) &&
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(((kse = _kse_alloc(curthread)) == NULL)
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(((kse = _kse_alloc(curthread, 1)) == NULL)
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|| ((kseg = _kseg_alloc(curthread)) == NULL))) {
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/* Insufficient memory to create a new KSE/KSEG: */
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ret = EAGAIN;
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@ -147,15 +149,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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kse->k_mbx.km_flags |= KMF_DONE;
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_kse_free(curthread, kse);
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}
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if ((new_thread->attr.flags & THR_STACK_USER) == 0) {
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crit = _kse_critical_enter();
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curkse = _get_curkse();
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KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
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/* Stack routines don't use malloc/free. */
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_thr_stack_free(&new_thread->attr);
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KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
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_kse_critical_leave(crit);
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}
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free_stack(&new_thread->attr);
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_thr_free(curthread, new_thread);
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}
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else {
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@ -178,9 +172,6 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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new_thread->cancelflags = PTHREAD_CANCEL_ENABLE |
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PTHREAD_CANCEL_DEFERRED;
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/* Initialize the thread for signals: */
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new_thread->sigmask = curthread->sigmask;
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/* No thread is wanting to join to this one: */
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new_thread->joiner = NULL;
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@ -193,6 +184,8 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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*/
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crit = _kse_critical_enter();
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THR_GETCONTEXT(&new_thread->tmbx.tm_context);
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/* Initialize the thread for signals: */
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new_thread->sigmask = curthread->sigmask;
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_kse_critical_leave(crit);
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new_thread->tmbx.tm_udata = new_thread;
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new_thread->tmbx.tm_context.uc_sigmask =
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@ -278,9 +271,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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}
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else {
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kse->k_curthread = NULL;
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#ifdef NOT_YET
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kse->k_kseg->kg_flags |= KGF_SINGLE_THREAD;
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#endif
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new_thread->kse = kse;
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new_thread->kseg = kse->k_kseg;
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kse->k_mbx.km_udata = kse;
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@ -308,6 +299,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
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static void
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free_thread(struct pthread *curthread, struct pthread *thread)
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{
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free_stack(&thread->attr);
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if ((thread->attr.flags & PTHREAD_SCOPE_SYSTEM) != 0) {
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/* Free the KSE and KSEG. */
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_kseg_free(thread->kseg);
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@ -332,6 +324,22 @@ create_stack(struct pthread_attr *pattr)
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return (ret);
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}
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static void
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free_stack(struct pthread_attr *pattr)
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{
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struct kse *curkse;
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kse_critical_t crit;
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if ((pattr->flags & THR_STACK_USER) == 0) {
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crit = _kse_critical_enter();
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curkse = _get_curkse();
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KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
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/* Stack routines don't use malloc/free. */
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_thr_stack_free(pattr);
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KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
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_kse_critical_leave(crit);
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}
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}
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static void
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thread_start(struct pthread *curthread, void *(*start_routine) (void *),
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@ -56,19 +56,17 @@ _thr_ref_add(struct pthread *curthread, struct pthread *thread,
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crit = _kse_critical_enter();
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curkse = _get_curkse();
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KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
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TAILQ_FOREACH(pthread, &_thread_list, tle) {
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if (pthread == thread) {
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if ((include_dead == 0) &&
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((pthread->state == PS_DEAD) ||
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((pthread->state == PS_DEADLOCK) ||
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((pthread->flags & THR_FLAGS_EXITING) != 0))))
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pthread = NULL;
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else {
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thread->refcount++;
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if (curthread != NULL)
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curthread->critical_count++;
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}
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break;
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pthread = _thr_hash_find(thread);
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if (pthread) {
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if ((include_dead == 0) &&
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((pthread->state == PS_DEAD) ||
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((pthread->state == PS_DEADLOCK) ||
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((pthread->flags & THR_FLAGS_EXITING) != 0))))
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pthread = NULL;
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else {
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pthread->refcount++;
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if (curthread != NULL)
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curthread->critical_count++;
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}
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}
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KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
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@ -259,12 +259,19 @@ _libpthread_init(struct pthread *curthread)
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_kse_init();
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/* Initialize the initial kse and kseg. */
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_kse_initial = _kse_alloc(NULL);
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#ifdef SYSTEM_SCOPE_ONLY
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_kse_initial = _kse_alloc(NULL, 1);
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#else
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_kse_initial = _kse_alloc(NULL, 0);
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#endif
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if (_kse_initial == NULL)
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PANIC("Can't allocate initial kse.");
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_kse_initial->k_kseg = _kseg_alloc(NULL);
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if (_kse_initial->k_kseg == NULL)
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PANIC("Can't allocate initial kseg.");
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#ifdef SYSTEM_SCOPE_ONLY
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_kse_initial->k_kseg->kg_flags |= KGF_SINGLE_THREAD;
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#endif
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_kse_initial->k_schedq = &_kse_initial->k_kseg->kg_schedq;
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TAILQ_INSERT_TAIL(&_kse_initial->k_kseg->kg_kseq, _kse_initial, k_kgqe);
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@ -326,7 +333,9 @@ init_main_thread(struct pthread *thread)
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/* Setup the thread attributes. */
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thread->attr = _pthread_attr_default;
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#ifdef SYSTEM_SCOPE_ONLY
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thread->attr.flags |= PTHREAD_SCOPE_SYSTEM;
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#endif
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/*
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* Set up the thread stack.
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*
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@ -463,9 +472,6 @@ init_private(void)
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TAILQ_INIT(&_thread_list);
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TAILQ_INIT(&_thread_gc_list);
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/* Initialize the SIG_DFL dummy handler count. */
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bzero(_thread_dfl_count, sizeof(_thread_dfl_count));
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/*
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* Initialize the lock for temporary installation of signal
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* handlers (to support sigwait() semantics) and for the
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@ -120,6 +120,10 @@ static int active_kse_count = 0;
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static int active_kseg_count = 0;
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static u_int64_t next_uniqueid = 1;
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LIST_HEAD(thread_hash_head, pthread);
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#define THREAD_HASH_QUEUES 127
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static struct thread_hash_head thr_hashtable[THREAD_HASH_QUEUES];
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#define THREAD_HASH(thrd) ((unsigned long)thrd % THREAD_HASH_QUEUES)
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#ifdef DEBUG_THREAD_KERN
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static void dump_queues(struct kse *curkse);
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@ -127,13 +131,11 @@ static void dump_queues(struct kse *curkse);
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static void kse_check_completed(struct kse *kse);
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static void kse_check_waitq(struct kse *kse);
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static void kse_fini(struct kse *curkse);
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static void kse_reinit(struct kse *kse);
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static void kse_reinit(struct kse *kse, int sys_scope);
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static void kse_sched_multi(struct kse *curkse);
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#ifdef NOT_YET
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static void kse_sched_single(struct kse *curkse);
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#endif
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static void kse_switchout_thread(struct kse *kse, struct pthread *thread);
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static void kse_wait(struct kse *kse, struct pthread *td_wait);
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static void kse_wait(struct kse *kse, struct pthread *td_wait, int sigseq);
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static void kse_free_unlocked(struct kse *kse);
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static void kseg_free_unlocked(struct kse_group *kseg);
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static void kseg_init(struct kse_group *kseg);
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@ -385,16 +387,30 @@ _kse_setthreaded(int threaded)
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*/
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_thr_signal_init();
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_kse_initial->k_flags |= KF_STARTED;
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#ifdef SYSTEM_SCOPE_ONLY
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/*
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* For bound thread, kernel reads mailbox pointer once,
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* we'd set it here before calling kse_create
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*/
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KSE_SET_MBOX(_kse_initial, _thr_initial);
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_kse_initial->k_mbx.km_flags |= KMF_BOUND;
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#endif
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if (kse_create(&_kse_initial->k_mbx, 0) != 0) {
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_kse_initial->k_flags &= ~KF_STARTED;
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__isthreaded = 0;
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/* may abort() */
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PANIC("kse_create() failed\n");
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return (-1);
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}
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#ifndef SYSTEM_SCOPE_ONLY
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/* Set current thread to initial thread */
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KSE_SET_MBOX(_kse_initial, _thr_initial);
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_thr_start_sig_daemon();
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_thr_setmaxconcurrency();
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#endif
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}
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return (0);
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}
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@ -592,7 +608,9 @@ _thr_sched_switch_unlocked(struct pthread *curthread)
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* instead of the next thread in the run queue, but
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* we don't bother checking for that.
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*/
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if ((curthread->state == PS_DEAD) ||
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if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
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kse_sched_single(curkse);
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else if ((curthread->state == PS_DEAD) ||
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(((td = KSE_RUNQ_FIRST(curkse)) == NULL) &&
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(curthread->state != PS_RUNNING)) ||
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((td != NULL) && (td->lock_switch == 0))) {
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@ -693,30 +711,34 @@ _thr_sched_switch_unlocked(struct pthread *curthread)
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* KSE, but we use a separate scheduler so that it can be fine-tuned
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* to be more efficient (and perhaps not need a separate stack for
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* the KSE, allowing it to use the thread's stack).
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*
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* XXX - This probably needs some work.
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*/
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#ifdef NOT_YET
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static void
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kse_sched_single(struct kse *curkse)
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{
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struct pthread *curthread = curkse->k_curthread;
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struct pthread *td_wait;
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struct timespec ts;
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int level;
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sigset_t sigmask;
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int i, sigseqno, level, first = 0;
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if (curthread->active == 0) {
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if (curthread->state != PS_RUNNING) {
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/* Check to see if the thread has timed out. */
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KSE_GET_TOD(curkse, &ts);
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if (thr_timedout(curthread, &ts) != 0) {
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curthread->timeout = 1;
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curthread->state = PS_RUNNING;
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}
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}
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}
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if ((curkse->k_flags & KF_INITIALIZED) == 0) {
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/* Setup this KSEs specific data. */
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_ksd_setprivate(&curkse->k_ksd);
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_set_curkse(curkse);
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curkse->k_flags |= KF_INITIALIZED;
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first = 1;
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curthread->active = 1;
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/* Setup kernel signal masks for new thread. */
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__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
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/*
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* Enter critical region, this is meanless for bound thread,
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* It is used to let other code work, those code want mailbox
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* to be cleared.
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*/
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_kse_critical_enter();
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}
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/* This thread no longer needs to yield the CPU: */
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curthread->critical_yield = 0;
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curthread->need_switchout = 0;
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@ -726,7 +748,8 @@ kse_sched_single(struct kse *curkse)
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* There is no scheduling queue for single threaded KSEs,
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* but we need a lock for protection regardless.
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*/
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KSE_SCHED_LOCK(curkse, curkse->k_kseg);
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if (curthread->lock_switch == 0)
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KSE_SCHED_LOCK(curkse, curkse->k_kseg);
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/*
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* This has to do the job of kse_switchout_thread(), only
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@ -735,33 +758,46 @@ kse_sched_single(struct kse *curkse)
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switch (curthread->state) {
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case PS_DEAD:
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curthread->check_pending = 0;
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/* Unlock the scheduling queue and exit the KSE and thread. */
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thr_cleaup(curkse, curthread);
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thr_cleanup(curkse, curthread);
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KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
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PANIC("bound thread shouldn't get here\n");
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break;
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case PS_COND_WAIT:
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case PS_SIGWAIT:
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PANIC("bound thread does not have SIGWAIT state\n");
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case PS_SLEEP_WAIT:
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/* Only insert threads that can timeout: */
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if (curthread->wakeup_time.tv_sec != -1) {
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/* Insert into the waiting queue: */
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KSE_WAITQ_INSERT(curkse, curthread);
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}
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PANIC("bound thread does not have SLEEP_WAIT state\n");
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case PS_SIGSUSPEND:
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PANIC("bound thread does not have SIGSUSPEND state\n");
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case PS_COND_WAIT:
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break;
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case PS_LOCKWAIT:
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/*
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* This state doesn't timeout.
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*/
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curthread->wakeup_time.tv_sec = -1;
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curthread->wakeup_time.tv_nsec = -1;
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level = curthread->locklevel - 1;
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if (!_LCK_GRANTED(&curthread->lockusers[level]))
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KSE_WAITQ_INSERT(curkse, curthread);
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else
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if (_LCK_GRANTED(&curthread->lockusers[level]))
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THR_SET_STATE(curthread, PS_RUNNING);
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break;
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case PS_RUNNING:
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if ((curthread->flags & THR_FLAGS_SUSPENDED) != 0) {
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THR_SET_STATE(curthread, PS_SUSPENDED);
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}
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curthread->wakeup_time.tv_sec = -1;
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curthread->wakeup_time.tv_nsec = -1;
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break;
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|
||||
case PS_JOIN:
|
||||
case PS_MUTEX_WAIT:
|
||||
case PS_RUNNING:
|
||||
case PS_SIGSUSPEND:
|
||||
case PS_SIGWAIT:
|
||||
case PS_SUSPENDED:
|
||||
case PS_DEADLOCK:
|
||||
default:
|
||||
@ -769,41 +805,66 @@ kse_sched_single(struct kse *curkse)
|
||||
* These states don't timeout and don't need
|
||||
* to be in the waiting queue.
|
||||
*/
|
||||
curthread->wakeup_time.tv_sec = -1;
|
||||
curthread->wakeup_time.tv_nsec = -1;
|
||||
break;
|
||||
}
|
||||
|
||||
while (curthread->state != PS_RUNNING) {
|
||||
curthread->active = 0;
|
||||
td_wait = KSE_WAITQ_FIRST(curkse);
|
||||
sigseqno = curkse->k_sigseqno;
|
||||
if (curthread->check_pending != 0) {
|
||||
/*
|
||||
* Install pending signals into the frame, possible
|
||||
* cause mutex or condvar backout.
|
||||
*/
|
||||
curthread->check_pending = 0;
|
||||
SIGFILLSET(sigmask);
|
||||
|
||||
kse_wait(curkse, td_wait);
|
||||
|
||||
if (td_wait != NULL) {
|
||||
KSE_GET_TOD(curkse, &ts);
|
||||
if (thr_timedout(curthread, &ts)) {
|
||||
/* Indicate the thread timedout: */
|
||||
td_wait->timeout = 1;
|
||||
|
||||
/* Make the thread runnable. */
|
||||
THR_SET_STATE(td_wait, PS_RUNNING);
|
||||
KSE_WAITQ_REMOVE(curkse, td_wait);
|
||||
/*
|
||||
* Lock out kernel signal code when we are processing
|
||||
* signals, and get a fresh copy of signal mask.
|
||||
*/
|
||||
__sys_sigprocmask(SIG_SETMASK, &sigmask,
|
||||
&curthread->sigmask);
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(curthread->sigmask, i))
|
||||
continue;
|
||||
if (SIGISMEMBER(curthread->sigpend, i))
|
||||
_thr_sig_add(curthread, i,
|
||||
&curthread->siginfo[i-1]);
|
||||
}
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask,
|
||||
NULL);
|
||||
/* The above code might make thread runnable */
|
||||
if (curthread->state == PS_RUNNING)
|
||||
break;
|
||||
}
|
||||
THR_DEACTIVATE_LAST_LOCK(curthread);
|
||||
kse_wait(curkse, curthread, sigseqno);
|
||||
THR_ACTIVATE_LAST_LOCK(curthread);
|
||||
KSE_GET_TOD(curkse, &ts);
|
||||
if (thr_timedout(curthread, &ts)) {
|
||||
/* Indicate the thread timedout: */
|
||||
curthread->timeout = 1;
|
||||
/* Make the thread runnable. */
|
||||
THR_SET_STATE(curthread, PS_RUNNING);
|
||||
}
|
||||
}
|
||||
|
||||
/* Remove the frame reference. */
|
||||
curthread->curframe = NULL;
|
||||
|
||||
/* Unlock the scheduling queue. */
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
if (curthread->lock_switch == 0) {
|
||||
/* Unlock the scheduling queue. */
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
}
|
||||
|
||||
/*
|
||||
* Continue the thread at its current frame:
|
||||
*/
|
||||
DBG_MSG("Continuing bound thread %p\n", curthread);
|
||||
_thread_switch(&curthread->tmbx, &curkse->k_mbx.km_curthread);
|
||||
PANIC("Thread has returned from _thread_switch");
|
||||
if (first) {
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
pthread_exit(curthread->start_routine(curthread->arg));
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef DEBUG_THREAD_KERN
|
||||
static void
|
||||
@ -929,7 +990,7 @@ kse_sched_multi(struct kse *curkse)
|
||||
* no more threads.
|
||||
*/
|
||||
td_wait = KSE_WAITQ_FIRST(curkse);
|
||||
kse_wait(curkse, td_wait);
|
||||
kse_wait(curkse, td_wait, 0);
|
||||
kse_check_completed(curkse);
|
||||
kse_check_waitq(curkse);
|
||||
}
|
||||
@ -1003,8 +1064,8 @@ kse_sched_multi(struct kse *curkse)
|
||||
signalcontext(&curthread->tmbx.tm_context, 0,
|
||||
(__sighandler_t *)thr_resume_wrapper);
|
||||
#else
|
||||
if ((curframe == NULL) && (curthread->check_pending != 0) &&
|
||||
!THR_IN_CRITICAL(curthread)) {
|
||||
if ((curframe == NULL) && (curthread->state == PS_RUNNING) &&
|
||||
(curthread->check_pending != 0) && !THR_IN_CRITICAL(curthread)) {
|
||||
curthread->check_pending = 0;
|
||||
signalcontext(&curthread->tmbx.tm_context, 0,
|
||||
(__sighandler_t *)thr_resume_wrapper);
|
||||
@ -1129,7 +1190,11 @@ thr_cleanup(struct kse *curkse, struct pthread *thread)
|
||||
THR_GCLIST_ADD(thread);
|
||||
/* Use thread_list_lock */
|
||||
active_threads--;
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
if (active_threads == 0) {
|
||||
#else
|
||||
if (active_threads == 1) {
|
||||
#endif
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
exit(0);
|
||||
}
|
||||
@ -1139,7 +1204,10 @@ thr_cleanup(struct kse *curkse, struct pthread *thread)
|
||||
* System scope thread is single thread group,
|
||||
* when thread is exited, its kse and ksegrp should
|
||||
* be recycled as well.
|
||||
* kse upcall stack belongs to thread, clear it here.
|
||||
*/
|
||||
curkse->k_stack.ss_sp = 0;
|
||||
curkse->k_stack.ss_size = 0;
|
||||
kse_exit();
|
||||
PANIC("kse_exit() failed for system scope thread");
|
||||
}
|
||||
@ -1239,30 +1307,30 @@ _thr_schedule_add(struct pthread *curthread, struct pthread *newthread)
|
||||
* the mailbox is set for the current thread.
|
||||
*/
|
||||
if ((newthread->attr.flags & PTHREAD_SCOPE_SYSTEM) != 0) {
|
||||
#ifdef NOT_YET
|
||||
/* We use the thread's stack as the KSE's stack. */
|
||||
new_thread->kse->k_mbx.km_stack.ss_sp =
|
||||
new_thread->attr.stackaddr_attr;
|
||||
new_thread->kse->k_mbx.km_stack.ss_size =
|
||||
new_thread->attr.stacksize_attr;
|
||||
#endif
|
||||
newthread->kse->k_mbx.km_stack.ss_sp =
|
||||
newthread->attr.stackaddr_attr;
|
||||
newthread->kse->k_mbx.km_stack.ss_size =
|
||||
newthread->attr.stacksize_attr;
|
||||
|
||||
/*
|
||||
* No need to lock the scheduling queue since the
|
||||
* KSE/KSEG pair have not yet been started.
|
||||
*/
|
||||
KSEG_THRQ_ADD(newthread->kseg, newthread);
|
||||
if (newthread->state == PS_RUNNING)
|
||||
THR_RUNQ_INSERT_TAIL(newthread);
|
||||
newthread->kse->k_curthread = NULL;
|
||||
newthread->kse->k_mbx.km_flags = 0;
|
||||
newthread->kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
/* this thread never gives up kse */
|
||||
newthread->active = 1;
|
||||
newthread->kse->k_curthread = newthread;
|
||||
newthread->kse->k_mbx.km_flags = KMF_BOUND;
|
||||
newthread->kse->k_mbx.km_func = (kse_func_t *)kse_sched_single;
|
||||
newthread->kse->k_mbx.km_quantum = 0;
|
||||
|
||||
KSE_SET_MBOX(newthread->kse, newthread);
|
||||
/*
|
||||
* This thread needs a new KSE and KSEG.
|
||||
*/
|
||||
newthread->kse->k_flags &= ~KF_INITIALIZED;
|
||||
newthread->kse->k_flags |= KF_STARTED;
|
||||
/* Fire up! */
|
||||
ret = kse_create(&newthread->kse->k_mbx, 1);
|
||||
if (ret != 0)
|
||||
ret = errno;
|
||||
@ -1492,7 +1560,7 @@ kse_switchout_thread(struct kse *kse, struct pthread *thread)
|
||||
!SIGISMEMBER(thread->sigmask, i)) {
|
||||
restart = _thread_sigact[1 - 1].sa_flags & SA_RESTART;
|
||||
kse_thr_interrupt(&thread->tmbx,
|
||||
restart ? -2 : -1);
|
||||
restart ? KSE_INTR_RESTART : KSE_INTR_INTERRUPT, 0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -1617,7 +1685,7 @@ kse_switchout_thread(struct kse *kse, struct pthread *thread)
|
||||
* This must be called with the scheduling lock held.
|
||||
*/
|
||||
static void
|
||||
kse_wait(struct kse *kse, struct pthread *td_wait)
|
||||
kse_wait(struct kse *kse, struct pthread *td_wait, int sigseqno)
|
||||
{
|
||||
struct timespec ts, ts_sleep;
|
||||
int saved_flags;
|
||||
@ -1640,10 +1708,15 @@ kse_wait(struct kse *kse, struct pthread *td_wait)
|
||||
KSE_SET_IDLE(kse);
|
||||
kse->k_kseg->kg_idle_kses++;
|
||||
KSE_SCHED_UNLOCK(kse, kse->k_kseg);
|
||||
saved_flags = kse->k_mbx.km_flags;
|
||||
kse->k_mbx.km_flags |= KMF_NOUPCALL;
|
||||
kse_release(&ts_sleep);
|
||||
kse->k_mbx.km_flags = saved_flags;
|
||||
if ((kse->k_kseg->kg_flags & KGF_SINGLE_THREAD) &&
|
||||
(kse->k_sigseqno != sigseqno))
|
||||
; /* don't sleep */
|
||||
else {
|
||||
saved_flags = kse->k_mbx.km_flags;
|
||||
kse->k_mbx.km_flags |= KMF_NOUPCALL;
|
||||
kse_release(&ts_sleep);
|
||||
kse->k_mbx.km_flags = saved_flags;
|
||||
}
|
||||
KSE_SCHED_LOCK(kse, kse->k_kseg);
|
||||
if (KSE_IS_IDLE(kse)) {
|
||||
KSE_CLEAR_IDLE(kse);
|
||||
@ -1965,7 +2038,7 @@ _kseg_free(struct kse_group *kseg)
|
||||
* In this case, we don't need to (and can't) take any locks.
|
||||
*/
|
||||
struct kse *
|
||||
_kse_alloc(struct pthread *curthread)
|
||||
_kse_alloc(struct pthread *curthread, int sys_scope)
|
||||
{
|
||||
struct kse *kse = NULL;
|
||||
kse_critical_t crit;
|
||||
@ -1991,7 +2064,7 @@ _kse_alloc(struct pthread *curthread)
|
||||
KSE_LOCK_RELEASE(curthread->kse, &kse_lock);
|
||||
_kse_critical_leave(crit);
|
||||
if (kse != NULL)
|
||||
kse_reinit(kse);
|
||||
kse_reinit(kse, sys_scope);
|
||||
}
|
||||
if ((kse == NULL) &&
|
||||
((kse = (struct kse *)malloc(sizeof(*kse))) != NULL)) {
|
||||
@ -2009,16 +2082,16 @@ _kse_alloc(struct pthread *curthread)
|
||||
|
||||
/*
|
||||
* Create the KSE context.
|
||||
*
|
||||
* XXX - For now this is done here in the allocation.
|
||||
* In the future, we may want to have it done
|
||||
* outside the allocation so that scope system
|
||||
* threads (one thread per KSE) are not required
|
||||
* to have a stack for an unneeded kse upcall.
|
||||
* Scope system threads (one thread per KSE) are not required
|
||||
* to have a stack for an unneeded kse upcall.
|
||||
*/
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
kse->k_mbx.km_stack.ss_sp = (char *)malloc(KSE_STACKSIZE);
|
||||
kse->k_mbx.km_stack.ss_size = KSE_STACKSIZE;
|
||||
if (!sys_scope) {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
kse->k_stack.ss_sp = (char *) malloc(KSE_STACKSIZE);
|
||||
kse->k_stack.ss_size = KSE_STACKSIZE;
|
||||
} else {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_single;
|
||||
}
|
||||
kse->k_mbx.km_udata = (void *)kse;
|
||||
kse->k_mbx.km_quantum = 20000;
|
||||
/*
|
||||
@ -2026,9 +2099,8 @@ _kse_alloc(struct pthread *curthread)
|
||||
* doesn't get used; a KSE running a scope system
|
||||
* thread will use that thread's stack.
|
||||
*/
|
||||
kse->k_stack.ss_sp = kse->k_mbx.km_stack.ss_sp;
|
||||
kse->k_stack.ss_size = kse->k_mbx.km_stack.ss_size;
|
||||
if (kse->k_mbx.km_stack.ss_sp == NULL) {
|
||||
kse->k_mbx.km_stack = kse->k_stack;
|
||||
if (!sys_scope && kse->k_stack.ss_sp == NULL) {
|
||||
for (i = 0; i < MAX_KSE_LOCKLEVEL; i++) {
|
||||
_lockuser_destroy(&kse->k_lockusers[i]);
|
||||
}
|
||||
@ -2049,7 +2121,8 @@ _kse_alloc(struct pthread *curthread)
|
||||
KSE_LOCK_RELEASE(curthread->kse, &kse_lock);
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
free(kse->k_mbx.km_stack.ss_sp);
|
||||
if (kse->k_stack.ss_sp)
|
||||
free(kse->k_stack.ss_sp);
|
||||
for (i = 0; i < MAX_KSE_LOCKLEVEL; i++) {
|
||||
_lockuser_destroy(&kse->k_lockusers[i]);
|
||||
}
|
||||
@ -2068,15 +2141,27 @@ _kse_alloc(struct pthread *curthread)
|
||||
}
|
||||
|
||||
static void
|
||||
kse_reinit(struct kse *kse)
|
||||
kse_reinit(struct kse *kse, int sys_scope)
|
||||
{
|
||||
/*
|
||||
* XXX - For now every kse has its stack.
|
||||
* In the future, we may want to have it done
|
||||
* outside the allocation so that scope system
|
||||
* threads (one thread per KSE) are not required
|
||||
* to have a stack for an unneeded kse upcall.
|
||||
*/
|
||||
if (!sys_scope) {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
if (kse->k_stack.ss_sp == NULL) {
|
||||
/* XXX check allocation failure */
|
||||
kse->k_stack.ss_sp = (char *) malloc(KSE_STACKSIZE);
|
||||
kse->k_stack.ss_size = KSE_STACKSIZE;
|
||||
}
|
||||
kse->k_mbx.km_quantum = 20000;
|
||||
} else {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_single;
|
||||
if (kse->k_stack.ss_sp)
|
||||
free(kse->k_stack.ss_sp);
|
||||
kse->k_stack.ss_sp = NULL;
|
||||
kse->k_stack.ss_size = 0;
|
||||
kse->k_mbx.km_quantum = 0;
|
||||
}
|
||||
kse->k_mbx.km_stack = kse->k_stack;
|
||||
kse->k_mbx.km_udata = (void *)kse;
|
||||
kse->k_mbx.km_curthread = NULL;
|
||||
kse->k_mbx.km_flags = 0;
|
||||
kse->k_curthread = 0;
|
||||
kse->k_kseg = 0;
|
||||
@ -2092,6 +2177,7 @@ kse_reinit(struct kse *kse)
|
||||
kse->k_cpu = 0;
|
||||
kse->k_done = 0;
|
||||
kse->k_switch = 0;
|
||||
kse->k_sigseqno = 0;
|
||||
}
|
||||
|
||||
void
|
||||
@ -2226,7 +2312,6 @@ thr_link(struct pthread *thread)
|
||||
THR_LIST_ADD(thread);
|
||||
active_threads++;
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
|
||||
@ -2241,11 +2326,39 @@ thr_unlink(struct pthread *thread)
|
||||
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
|
||||
THR_LIST_REMOVE(thread);
|
||||
active_threads--;
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
|
||||
void
|
||||
_thr_hash_add(struct pthread *thread)
|
||||
{
|
||||
struct thread_hash_head *head;
|
||||
|
||||
head = &thr_hashtable[THREAD_HASH(thread)];
|
||||
LIST_INSERT_HEAD(head, thread, hle);
|
||||
}
|
||||
|
||||
void
|
||||
_thr_hash_remove(struct pthread *thread)
|
||||
{
|
||||
LIST_REMOVE(thread, hle);
|
||||
}
|
||||
|
||||
struct pthread *
|
||||
_thr_hash_find(struct pthread *thread)
|
||||
{
|
||||
struct pthread *td;
|
||||
struct thread_hash_head *head;
|
||||
|
||||
head = &thr_hashtable[THREAD_HASH(thread)];
|
||||
LIST_FOREACH(td, head, hle) {
|
||||
if (td == thread)
|
||||
return (thread);
|
||||
}
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
|
@ -55,8 +55,9 @@ _nanosleep(const struct timespec *time_to_sleep,
|
||||
errno = EINVAL;
|
||||
ret = -1;
|
||||
} else {
|
||||
if (!_kse_isthreaded())
|
||||
return __sys_nanosleep(time_to_sleep, time_remaining);
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
return (__sys_nanosleep(time_to_sleep, time_remaining));
|
||||
|
||||
KSE_GET_TOD(curthread->kse, &ts);
|
||||
|
||||
|
@ -202,6 +202,7 @@ struct kse {
|
||||
int k_cpu; /* CPU ID when bound */
|
||||
int k_done; /* this KSE is done */
|
||||
int k_switch; /* thread switch in UTS */
|
||||
int k_sigseqno; /* signal buffered count */
|
||||
};
|
||||
|
||||
/*
|
||||
@ -615,6 +616,9 @@ struct pthread {
|
||||
/* Queue entry for GC lists: */
|
||||
TAILQ_ENTRY(pthread) gcle;
|
||||
|
||||
/* Hash queue entry */
|
||||
LIST_ENTRY(pthread) hle;
|
||||
|
||||
/*
|
||||
* Lock for accesses to this thread structure.
|
||||
*/
|
||||
@ -662,7 +666,7 @@ struct pthread {
|
||||
sigset_t oldsigmask;
|
||||
sigset_t sigmask;
|
||||
sigset_t sigpend;
|
||||
int check_pending;
|
||||
volatile int check_pending;
|
||||
int refcount;
|
||||
|
||||
/* Thread state: */
|
||||
@ -894,12 +898,14 @@ do { \
|
||||
#define THR_LIST_ADD(thrd) do { \
|
||||
if (((thrd)->flags & THR_FLAGS_IN_TDLIST) == 0) { \
|
||||
TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \
|
||||
_thr_hash_add(thrd); \
|
||||
(thrd)->flags |= THR_FLAGS_IN_TDLIST; \
|
||||
} \
|
||||
} while (0)
|
||||
#define THR_LIST_REMOVE(thrd) do { \
|
||||
if (((thrd)->flags & THR_FLAGS_IN_TDLIST) != 0) { \
|
||||
TAILQ_REMOVE(&_thread_list, thrd, tle); \
|
||||
_thr_hash_remove(thrd); \
|
||||
(thrd)->flags &= ~THR_FLAGS_IN_TDLIST; \
|
||||
} \
|
||||
} while (0)
|
||||
@ -1000,13 +1006,6 @@ SCLASS int _clock_res_usec SCLASS_PRESET(CLOCK_RES_USEC);
|
||||
/* Array of signal actions for this process: */
|
||||
SCLASS struct sigaction _thread_sigact[_SIG_MAXSIG];
|
||||
|
||||
/*
|
||||
* Array of counts of dummy handlers for SIG_DFL signals. This is used to
|
||||
* assure that there is always a dummy signal handler installed while there
|
||||
* is a thread sigwait()ing on the corresponding signal.
|
||||
*/
|
||||
SCLASS int _thread_dfl_count[_SIG_MAXSIG];
|
||||
|
||||
/*
|
||||
* Lock for above count of dummy handlers and for the process signal
|
||||
* mask and pending signal sets.
|
||||
@ -1047,7 +1046,7 @@ void _cond_wait_backout(struct pthread *);
|
||||
struct pthread *_get_curthread(void);
|
||||
struct kse *_get_curkse(void);
|
||||
void _set_curkse(struct kse *);
|
||||
struct kse *_kse_alloc(struct pthread *);
|
||||
struct kse *_kse_alloc(struct pthread *, int sys_scope);
|
||||
kse_critical_t _kse_critical_enter(void);
|
||||
void _kse_critical_leave(kse_critical_t);
|
||||
int _kse_in_critical(void);
|
||||
@ -1131,11 +1130,16 @@ void _thr_enter_cancellation_point(struct pthread *);
|
||||
void _thr_leave_cancellation_point(struct pthread *);
|
||||
int _thr_setconcurrency(int new_level);
|
||||
int _thr_setmaxconcurrency(void);
|
||||
void _thr_critical_enter(struct pthread *);
|
||||
void _thr_critical_leave(struct pthread *);
|
||||
int _thr_start_sig_daemon(void);
|
||||
int _thr_getprocsig(int sig, siginfo_t *siginfo);
|
||||
int _thr_getprocsig_unlocked(int sig, siginfo_t *siginfo);
|
||||
void _thr_signal_init(void);
|
||||
void _thr_signal_deinit(void);
|
||||
void _thr_hash_add(struct pthread *);
|
||||
void _thr_hash_remove(struct pthread *);
|
||||
struct pthread *_thr_hash_find(struct pthread *);
|
||||
|
||||
/*
|
||||
* Aliases for _pthread functions. Should be called instead of
|
||||
|
@ -45,16 +45,55 @@
|
||||
|
||||
/* Prototypes: */
|
||||
static void build_siginfo(siginfo_t *info, int signo);
|
||||
static void thr_sig_check_state(struct pthread *pthread, int sig);
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
static struct pthread *thr_sig_find(struct kse *curkse, int sig,
|
||||
siginfo_t *info);
|
||||
static void handle_special_signals(struct kse *curkse, int sig);
|
||||
#endif
|
||||
static void thr_sigframe_add(struct pthread *thread);
|
||||
static void thr_sigframe_restore(struct pthread *thread,
|
||||
struct pthread_sigframe *psf);
|
||||
static void thr_sigframe_save(struct pthread *thread,
|
||||
struct pthread_sigframe *psf);
|
||||
|
||||
#define SA_KILL 0x01 /* terminates process by default */
|
||||
#define SA_STOP 0x02
|
||||
#define SA_CONT 0x04
|
||||
|
||||
static int sigproptbl[NSIG] = {
|
||||
SA_KILL, /* SIGHUP */
|
||||
SA_KILL, /* SIGINT */
|
||||
SA_KILL, /* SIGQUIT */
|
||||
SA_KILL, /* SIGILL */
|
||||
SA_KILL, /* SIGTRAP */
|
||||
SA_KILL, /* SIGABRT */
|
||||
SA_KILL, /* SIGEMT */
|
||||
SA_KILL, /* SIGFPE */
|
||||
SA_KILL, /* SIGKILL */
|
||||
SA_KILL, /* SIGBUS */
|
||||
SA_KILL, /* SIGSEGV */
|
||||
SA_KILL, /* SIGSYS */
|
||||
SA_KILL, /* SIGPIPE */
|
||||
SA_KILL, /* SIGALRM */
|
||||
SA_KILL, /* SIGTERM */
|
||||
0, /* SIGURG */
|
||||
SA_STOP, /* SIGSTOP */
|
||||
SA_STOP, /* SIGTSTP */
|
||||
SA_CONT, /* SIGCONT */
|
||||
0, /* SIGCHLD */
|
||||
SA_STOP, /* SIGTTIN */
|
||||
SA_STOP, /* SIGTTOU */
|
||||
0, /* SIGIO */
|
||||
SA_KILL, /* SIGXCPU */
|
||||
SA_KILL, /* SIGXFSZ */
|
||||
SA_KILL, /* SIGVTALRM */
|
||||
SA_KILL, /* SIGPROF */
|
||||
0, /* SIGWINCH */
|
||||
0, /* SIGINFO */
|
||||
SA_KILL, /* SIGUSR1 */
|
||||
SA_KILL /* SIGUSR2 */
|
||||
};
|
||||
|
||||
/* #define DEBUG_SIGNAL */
|
||||
#ifdef DEBUG_SIGNAL
|
||||
#define DBG_MSG stdout_debug
|
||||
@ -133,6 +172,8 @@ static void thr_sigframe_save(struct pthread *thread,
|
||||
* signal unmasked.
|
||||
*/
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
|
||||
static void *
|
||||
sig_daemon(void *arg /* Unused */)
|
||||
{
|
||||
@ -143,13 +184,20 @@ sig_daemon(void *arg /* Unused */)
|
||||
struct kse *curkse;
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
DBG_MSG("signal daemon started\n");
|
||||
DBG_MSG("signal daemon started(%p)\n", curthread);
|
||||
|
||||
curthread->name = strdup("signal thread");
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
|
||||
/*
|
||||
* Daemon thread is a bound thread and we must be created with
|
||||
* all signals masked
|
||||
*/
|
||||
#if 0
|
||||
SIGFILLSET(set);
|
||||
__sys_sigprocmask(SIG_SETMASK, &set, NULL);
|
||||
#endif
|
||||
__sys_sigpending(&set);
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
@ -173,13 +221,14 @@ sig_daemon(void *arg /* Unused */)
|
||||
return (0);
|
||||
}
|
||||
|
||||
|
||||
/* Utility function to create signal daemon thread */
|
||||
int
|
||||
_thr_start_sig_daemon(void)
|
||||
{
|
||||
pthread_attr_t attr;
|
||||
sigset_t sigset, oldset;
|
||||
|
||||
|
||||
SIGFILLSET(sigset);
|
||||
pthread_sigmask(SIG_SETMASK, &sigset, &oldset);
|
||||
pthread_attr_init(&attr);
|
||||
@ -206,6 +255,13 @@ _thr_sig_dispatch(struct kse *curkse, int sig, siginfo_t *info)
|
||||
|
||||
/* Some signals need special handling: */
|
||||
handle_special_signals(curkse, sig);
|
||||
|
||||
/* Check if the signal requires a dump of thread information: */
|
||||
if (sig == SIGINFO) {
|
||||
/* Dump thread information to file: */
|
||||
_thread_dump_info();
|
||||
}
|
||||
|
||||
while ((thread = thr_sig_find(curkse, sig, info)) != NULL) {
|
||||
/*
|
||||
* Setup the target thread to receive the signal:
|
||||
@ -233,11 +289,27 @@ _thr_sig_dispatch(struct kse *curkse, int sig, siginfo_t *info)
|
||||
DBG_MSG("<<< _thr_sig_dispatch\n");
|
||||
}
|
||||
|
||||
#endif /* ! SYSTEM_SCOPE_ONLY */
|
||||
|
||||
static __inline int
|
||||
sigprop(int sig)
|
||||
{
|
||||
|
||||
if (sig > 0 && sig < NSIG)
|
||||
return (sigproptbl[_SIG_IDX(sig)]);
|
||||
return (0);
|
||||
}
|
||||
|
||||
void
|
||||
_thr_sig_handler(int sig, siginfo_t *info, ucontext_t *ucp)
|
||||
{
|
||||
__siginfohandler_t *sigfunc;
|
||||
struct pthread *curthread;
|
||||
struct kse *curkse;
|
||||
struct sigaction act;
|
||||
int sa_flags, err_save, intr_save, timeout_save;
|
||||
|
||||
DBG_MSG(">>> _thr_sig_handler(%d)\n", sig);
|
||||
|
||||
curkse = _get_curkse();
|
||||
if ((curkse == NULL) || ((curkse->k_flags & KF_STARTED) == 0)) {
|
||||
@ -253,12 +325,86 @@ _thr_sig_handler(int sig, siginfo_t *info, ucontext_t *ucp)
|
||||
(*(sigfunc))(sig,
|
||||
(siginfo_t*)(intptr_t)info->si_code, ucp);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
else {
|
||||
/* Nothing. */
|
||||
DBG_MSG("Got signal %d\n", sig);
|
||||
/* XXX Bound thread will fall into this... */
|
||||
|
||||
curthread = _get_curthread();
|
||||
if (curthread == NULL)
|
||||
PANIC("No current thread.\n");
|
||||
if (!(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
PANIC("Thread is not system scope.\n");
|
||||
if (curthread->flags & THR_FLAGS_EXITING)
|
||||
return;
|
||||
curkse = _get_curkse();
|
||||
/*
|
||||
* If thread is in critical region or if thread is on
|
||||
* the way of state transition, then latch signal into buffer.
|
||||
*/
|
||||
if (_kse_in_critical() || THR_IN_CRITICAL(curthread) ||
|
||||
(curthread->state != PS_RUNNING && curthread->curframe == NULL)) {
|
||||
DBG_MSG(">>> _thr_sig_handler(%d) in critical\n", sig);
|
||||
curthread->siginfo[sig-1] = *info;
|
||||
curthread->check_pending = 1;
|
||||
curkse->k_sigseqno++;
|
||||
SIGADDSET(curthread->sigpend, sig);
|
||||
/*
|
||||
* If the kse is on the way to idle itself, but
|
||||
* we have signal ready, we should prevent it
|
||||
* to sleep, kernel will latch the wakeup request,
|
||||
* so kse_release will return from kernel immediately.
|
||||
*/
|
||||
if (KSE_IS_IDLE(curkse))
|
||||
kse_wakeup(&curkse->k_mbx);
|
||||
return;
|
||||
}
|
||||
|
||||
/* It is now safe to invoke signal handler */
|
||||
err_save = curthread->error;
|
||||
timeout_save = curthread->timeout;
|
||||
intr_save = curthread->interrupted;
|
||||
/* Get a fresh copy of signal mask from kernel, for thread dump only */
|
||||
__sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask);
|
||||
_kse_critical_enter();
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_signal_lock);
|
||||
sigfunc = _thread_sigact[sig - 1].sa_sigaction;
|
||||
sa_flags = _thread_sigact[sig - 1].sa_flags & SA_SIGINFO;
|
||||
if (sa_flags & SA_RESETHAND) {
|
||||
act.sa_handler = SIG_DFL;
|
||||
act.sa_flags = SA_RESTART;
|
||||
SIGEMPTYSET(act.sa_mask);
|
||||
__sys_sigaction(sig, &act, NULL);
|
||||
__sys_sigaction(sig, NULL, &_thread_sigact[sig - 1]);
|
||||
}
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_signal_lock);
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
|
||||
/* Now invoke real handler */
|
||||
if (((__sighandler_t *)sigfunc != SIG_DFL) &&
|
||||
((__sighandler_t *)sigfunc != SIG_IGN) &&
|
||||
(sigfunc != (__siginfohandler_t *)_thr_sig_handler)) {
|
||||
if ((sa_flags & SA_SIGINFO) != 0 || info == NULL)
|
||||
(*(sigfunc))(sig, info, ucp);
|
||||
else
|
||||
(*(sigfunc))(sig, (siginfo_t*)(intptr_t)info->si_code,
|
||||
ucp);
|
||||
} else {
|
||||
if ((__sighandler_t *)sigfunc == SIG_DFL) {
|
||||
if (sigprop(sig) & SA_KILL)
|
||||
kse_thr_interrupt(NULL, KSE_INTR_SIGEXIT, sig);
|
||||
#ifdef NOTYET
|
||||
else if (sigprop(sig) & SA_STOP)
|
||||
kse_thr_interrupt(NULL, KSE_INTR_JOBSTOP, sig);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
curthread->error = err_save;
|
||||
curthread->timeout = timeout_save;
|
||||
curthread->interrupted = intr_save;
|
||||
_kse_critical_enter();
|
||||
curthread->sigmask = ucp->uc_sigmask;
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
DBG_MSG("<<< _thr_sig_handler(%d)\n", sig);
|
||||
}
|
||||
|
||||
/* Must be called with signal lock and schedule lock held in order */
|
||||
@ -292,19 +438,22 @@ thr_sig_invoke_handler(struct pthread *curthread, int sig, siginfo_t *info,
|
||||
if (!(sa_flags & (SA_NODEFER | SA_RESETHAND)))
|
||||
SIGADDSET(curthread->sigmask, sig);
|
||||
if ((sig != SIGILL) && (sa_flags & SA_RESETHAND)) {
|
||||
if (_thread_dfl_count[sig - 1] == 0) {
|
||||
act.sa_handler = SIG_DFL;
|
||||
act.sa_flags = SA_RESTART;
|
||||
SIGEMPTYSET(act.sa_mask);
|
||||
__sys_sigaction(sig, &act, NULL);
|
||||
__sys_sigaction(sig, NULL, &_thread_sigact[sig - 1]);
|
||||
}
|
||||
act.sa_handler = SIG_DFL;
|
||||
act.sa_flags = SA_RESTART;
|
||||
SIGEMPTYSET(act.sa_mask);
|
||||
__sys_sigaction(sig, &act, NULL);
|
||||
__sys_sigaction(sig, NULL, &_thread_sigact[sig - 1]);
|
||||
}
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_signal_lock);
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
/*
|
||||
* We are processing buffered signals, synchronize working
|
||||
* signal mask into kernel.
|
||||
*/
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
|
||||
ucp->uc_sigmask = sigmask;
|
||||
|
||||
if (((__sighandler_t *)sigfunc != SIG_DFL) &&
|
||||
((__sighandler_t *)sigfunc != SIG_IGN)) {
|
||||
if ((sa_flags & SA_SIGINFO) != 0 || info == NULL)
|
||||
@ -313,24 +462,29 @@ thr_sig_invoke_handler(struct pthread *curthread, int sig, siginfo_t *info,
|
||||
(*(sigfunc))(sig, (siginfo_t*)(intptr_t)info->si_code,
|
||||
ucp);
|
||||
} else {
|
||||
/* XXX
|
||||
* TODO: exit process if signal would kill it.
|
||||
*/
|
||||
#ifdef NOTYET
|
||||
if ((__sighandler_t *)sigfunc == SIG_DFL) {
|
||||
if (sigprop(sig) & SA_KILL)
|
||||
kse_sigexit(sig);
|
||||
kse_thr_interrupt(NULL, KSE_INTR_SIGEXIT, sig);
|
||||
#ifdef NOTYET
|
||||
else if (sigprop(sig) & SA_STOP)
|
||||
kse_thr_interrupt(NULL, KSE_INTR_JOBSTOP, sig);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
_kse_critical_enter();
|
||||
/* Don't trust after critical leave/enter */
|
||||
curkse = _get_curkse();
|
||||
KSE_SCHED_LOCK(curkse, curkse->k_kseg);
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_signal_lock);
|
||||
|
||||
/*
|
||||
* Restore the thread's signal mask.
|
||||
*/
|
||||
curthread->sigmask = ucp->uc_sigmask;
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
__sys_sigprocmask(SIG_SETMASK, &ucp->uc_sigmask, NULL);
|
||||
KSE_SCHED_LOCK(curkse, curkse->k_kseg);
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_signal_lock);
|
||||
|
||||
DBG_MSG("Got signal %d, handler returned %p\n", sig, curthread);
|
||||
}
|
||||
|
||||
@ -365,13 +519,13 @@ _thr_getprocsig_unlocked(int sig, siginfo_t *siginfo)
|
||||
SIGADDSET(sigset, sig);
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
if (__sys_sigtimedwait(&sigset, siginfo, &ts) > 0) {
|
||||
SIGDELSET(_thr_proc_sigpending, sig);
|
||||
SIGDELSET(_thr_proc_sigpending, sig);
|
||||
if (__sys_sigtimedwait(&sigset, siginfo, &ts) > 0)
|
||||
return (sig);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
/*
|
||||
* Find a thread that can handle the signal. This must be called
|
||||
* with upcalls disabled.
|
||||
@ -381,15 +535,11 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
{
|
||||
struct pthread *pthread;
|
||||
struct pthread *suspended_thread, *signaled_thread;
|
||||
__siginfohandler_t *sigfunc;
|
||||
siginfo_t si;
|
||||
|
||||
DBG_MSG("Looking for thread to handle signal %d\n", sig);
|
||||
|
||||
/* Check if the signal requires a dump of thread information: */
|
||||
if (sig == SIGINFO) {
|
||||
/* Dump thread information to file: */
|
||||
_thread_dump_info();
|
||||
}
|
||||
/*
|
||||
* Enter a loop to look for threads that have the signal
|
||||
* unmasked. POSIX specifies that a thread in a sigwait
|
||||
@ -407,12 +557,9 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
TAILQ_FOREACH(pthread, &_thread_list, tle) {
|
||||
if (pthread == _thr_sig_daemon)
|
||||
continue;
|
||||
#ifdef NOTYET
|
||||
/* Signal delivering to bound thread is done by kernel */
|
||||
if (pthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
continue;
|
||||
#endif
|
||||
|
||||
/* Take the scheduling lock. */
|
||||
KSE_SCHED_LOCK(curkse, pthread->kseg);
|
||||
if ((pthread->state == PS_DEAD) ||
|
||||
@ -451,8 +598,16 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
return (NULL);
|
||||
} else if (!SIGISMEMBER(pthread->sigmask, sig) ||
|
||||
(!SIGISMEMBER(pthread->oldsigmask, sig) &&
|
||||
pthread->state == PS_SIGWAIT)) {
|
||||
(!SIGISMEMBER(pthread->oldsigmask, sig) &&
|
||||
pthread->state == PS_SIGWAIT)) {
|
||||
sigfunc = _thread_sigact[sig - 1].sa_sigaction;
|
||||
if ((__sighandler_t *)sigfunc == SIG_DFL) {
|
||||
if (sigprop(sig) & SA_KILL) {
|
||||
kse_thr_interrupt(NULL,
|
||||
KSE_INTR_SIGEXIT, sig);
|
||||
/* Never reach */
|
||||
}
|
||||
}
|
||||
if (pthread->state == PS_SIGSUSPEND) {
|
||||
if (suspended_thread == NULL) {
|
||||
suspended_thread = pthread;
|
||||
@ -478,6 +633,7 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
}
|
||||
return (pthread);
|
||||
}
|
||||
#endif /* ! SYSTEM_SCOPE_ONLY */
|
||||
|
||||
static void
|
||||
build_siginfo(siginfo_t *info, int signo)
|
||||
@ -501,8 +657,9 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
int i;
|
||||
kse_critical_t crit;
|
||||
struct kse *curkse;
|
||||
sigset_t sigmask;
|
||||
|
||||
DBG_MSG(">>> thr_sig_rundown %p\n", curthread);
|
||||
DBG_MSG(">>> thr_sig_rundown (%p)\n", curthread);
|
||||
/* Check the threads previous state: */
|
||||
if ((psf != NULL) && (psf->psf_valid != 0)) {
|
||||
/*
|
||||
@ -544,6 +701,15 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
curthread->active_priority &= ~THR_SIGNAL_PRIORITY;
|
||||
|
||||
while (1) {
|
||||
/*
|
||||
* For bound thread, we mask all signals and get a fresh
|
||||
* copy of signal mask from kernel
|
||||
*/
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
SIGFILLSET(sigmask);
|
||||
__sys_sigprocmask(SIG_SETMASK, &sigmask,
|
||||
&curthread->sigmask);
|
||||
}
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(curthread->sigmask, i))
|
||||
continue;
|
||||
@ -552,7 +718,8 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
siginfo = curthread->siginfo[i-1];
|
||||
break;
|
||||
}
|
||||
if (SIGISMEMBER(_thr_proc_sigpending, i)) {
|
||||
if (!(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
&& SIGISMEMBER(_thr_proc_sigpending, i)) {
|
||||
if (_thr_getprocsig_unlocked(i, &siginfo))
|
||||
break;
|
||||
}
|
||||
@ -568,12 +735,14 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
curkse = _get_curkse();
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_signal_lock);
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
|
||||
curthread->interrupted = interrupted;
|
||||
curthread->timeout = timeout;
|
||||
|
||||
DBG_MSG("<<< thr_sig_rundown %p\n", curthread);
|
||||
DBG_MSG("<<< thr_sig_rundown (%p)\n", curthread);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -603,6 +772,7 @@ _thr_sig_check_pending(struct pthread *curthread)
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
/*
|
||||
* This must be called with upcalls disabled.
|
||||
*/
|
||||
@ -631,6 +801,7 @@ handle_special_signals(struct kse *curkse, int sig)
|
||||
break;
|
||||
}
|
||||
}
|
||||
#endif /* ! SYSTEM_SCOPE_ONLY */
|
||||
|
||||
/*
|
||||
* Perform thread specific actions in response to a signal.
|
||||
@ -650,7 +821,7 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
struct kse *curkse;
|
||||
siginfo_t siginfo;
|
||||
|
||||
DBG_MSG(">>> _thr_sig_add\n");
|
||||
DBG_MSG(">>> _thr_sig_add %p (%d)\n", pthread, sig);
|
||||
|
||||
curkse = _get_curkse();
|
||||
restart = _thread_sigact[sig - 1].sa_flags & SA_RESTART;
|
||||
@ -660,13 +831,11 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
pthread->state == PS_STATE_MAX)
|
||||
return; /* return false */
|
||||
|
||||
#ifdef NOTYET
|
||||
if ((pthread->attrs.flags & PTHREAD_SCOPE_SYSTEM) != 0) {
|
||||
if (!fromproc)
|
||||
kse_thr_interrupt(&pthread->tmbx, 0, sig);
|
||||
if ((pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) &&
|
||||
(curthread != pthread)) {
|
||||
PANIC("Please use _thr_send_sig for bound thread");
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (pthread->curframe == NULL ||
|
||||
(pthread->state != PS_SIGWAIT &&
|
||||
@ -687,9 +856,11 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
}
|
||||
if (!SIGISMEMBER(pthread->sigmask, sig)) {
|
||||
pthread->check_pending = 1;
|
||||
if (pthread->blocked != 0 && !THR_IN_CRITICAL(pthread))
|
||||
if (!(pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) &&
|
||||
(pthread->blocked != 0) &&
|
||||
!THR_IN_CRITICAL(pthread))
|
||||
kse_thr_interrupt(&pthread->tmbx,
|
||||
restart ? -2 : -1);
|
||||
restart ? KSE_INTR_RESTART : KSE_INTR_INTERRUPT, 0);
|
||||
}
|
||||
}
|
||||
else {
|
||||
@ -801,64 +972,6 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
pthread->check_pending = 1;
|
||||
}
|
||||
}
|
||||
|
||||
DBG_MSG("<<< _thr_sig_add\n");
|
||||
}
|
||||
|
||||
static void
|
||||
thr_sig_check_state(struct pthread *pthread, int sig)
|
||||
{
|
||||
/*
|
||||
* Process according to thread state:
|
||||
*/
|
||||
switch (pthread->state) {
|
||||
/*
|
||||
* States which do not change when a signal is trapped:
|
||||
*/
|
||||
case PS_RUNNING:
|
||||
case PS_LOCKWAIT:
|
||||
case PS_MUTEX_WAIT:
|
||||
case PS_COND_WAIT:
|
||||
case PS_JOIN:
|
||||
case PS_SUSPENDED:
|
||||
case PS_DEAD:
|
||||
case PS_DEADLOCK:
|
||||
case PS_STATE_MAX:
|
||||
break;
|
||||
|
||||
case PS_SIGWAIT:
|
||||
build_siginfo(&pthread->siginfo[sig-1], sig);
|
||||
/* Wake up the thread if the signal is blocked. */
|
||||
if (!SIGISMEMBER(pthread->sigmask, sig)) {
|
||||
/* Return the signal number: */
|
||||
*(pthread->data.sigwaitinfo) = pthread->siginfo[sig-1];
|
||||
pthread->sigmask = pthread->oldsigmask;
|
||||
/* Change the state of the thread to run: */
|
||||
_thr_setrunnable_unlocked(pthread);
|
||||
} else {
|
||||
/* Increment the pending signal count. */
|
||||
SIGADDSET(pthread->sigpend, sig);
|
||||
if (!SIGISMEMBER(pthread->oldsigmask, sig)) {
|
||||
pthread->check_pending = 1;
|
||||
pthread->interrupted = 1;
|
||||
pthread->sigmask = pthread->oldsigmask;
|
||||
_thr_setrunnable_unlocked(pthread);
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case PS_SIGSUSPEND:
|
||||
case PS_SLEEP_WAIT:
|
||||
/*
|
||||
* Remove the thread from the wait queue and make it
|
||||
* runnable:
|
||||
*/
|
||||
_thr_setrunnable_unlocked(pthread);
|
||||
|
||||
/* Flag the operation as interrupted: */
|
||||
pthread->interrupted = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
@ -869,41 +982,14 @@ _thr_sig_send(struct pthread *pthread, int sig)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
#ifdef NOTYET
|
||||
if ((pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) == 0) {
|
||||
kse_thr_interrupt(&pthread->tmbx, sig);
|
||||
if (pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
kse_thr_interrupt(&pthread->tmbx, KSE_INTR_SENDSIG, sig);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Lock the scheduling queue of the target thread. */
|
||||
THR_SCHED_LOCK(curthread, pthread);
|
||||
|
||||
/* Check for signals whose actions are SIG_DFL: */
|
||||
if (_thread_sigact[sig - 1].sa_handler == SIG_DFL) {
|
||||
/*
|
||||
* Check to see if a temporary signal handler is
|
||||
* installed for sigwaiters:
|
||||
*/
|
||||
if (_thread_dfl_count[sig - 1] == 0) {
|
||||
/*
|
||||
* Deliver the signal to the process if a handler
|
||||
* is not installed:
|
||||
*/
|
||||
THR_SCHED_UNLOCK(curthread, pthread);
|
||||
kill(getpid(), sig);
|
||||
THR_SCHED_LOCK(curthread, pthread);
|
||||
}
|
||||
/*
|
||||
* Assuming we're still running after the above kill(),
|
||||
* make any necessary state changes to the thread:
|
||||
*/
|
||||
thr_sig_check_state(pthread, sig);
|
||||
THR_SCHED_UNLOCK(curthread, pthread);
|
||||
}
|
||||
/*
|
||||
* Check that the signal is not being ignored:
|
||||
*/
|
||||
else if (_thread_sigact[sig - 1].sa_handler != SIG_IGN) {
|
||||
if (_thread_sigact[sig - 1].sa_handler != SIG_IGN) {
|
||||
_thr_sig_add(pthread, sig, NULL);
|
||||
THR_SCHED_UNLOCK(curthread, pthread);
|
||||
/* XXX
|
||||
@ -965,6 +1051,7 @@ _thr_signal_init(void)
|
||||
{
|
||||
sigset_t sigset;
|
||||
struct sigaction act;
|
||||
__siginfohandler_t *sigfunc;
|
||||
int i;
|
||||
|
||||
SIGFILLSET(sigset);
|
||||
@ -984,6 +1071,15 @@ _thr_signal_init(void)
|
||||
*/
|
||||
PANIC("Cannot read signal handler info");
|
||||
}
|
||||
/* Intall wrapper if handler was set */
|
||||
sigfunc = _thread_sigact[i - 1].sa_sigaction;
|
||||
if (((__sighandler_t *)sigfunc) != SIG_DFL &&
|
||||
((__sighandler_t *)sigfunc) != SIG_IGN) {
|
||||
act = _thread_sigact[i - 1];
|
||||
act.sa_flags |= SA_SIGINFO;
|
||||
act.sa_sigaction = (__siginfohandler_t *)_thr_sig_handler;
|
||||
__sys_sigaction(i, &act, NULL);
|
||||
}
|
||||
}
|
||||
/*
|
||||
* Install the signal handler for SIGINFO. It isn't
|
||||
@ -1000,6 +1096,9 @@ _thr_signal_init(void)
|
||||
*/
|
||||
PANIC("Cannot initialize signal handler");
|
||||
}
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
__sys_sigprocmask(SIG_SETMASK, &_thr_initial->sigmask, NULL);
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
|
@ -52,6 +52,15 @@ _pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
|
||||
if (! _kse_isthreaded())
|
||||
_kse_setthreaded(1);
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
ret = __sys_sigprocmask(how, set, oset);
|
||||
if (ret != 0)
|
||||
ret = errno;
|
||||
/* Get a copy for thread dump */
|
||||
__sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
if (set)
|
||||
newset = *set;
|
||||
|
||||
|
@ -55,8 +55,9 @@ _sigpending(sigset_t *set)
|
||||
ret = EINVAL;
|
||||
}
|
||||
else {
|
||||
if (!_kse_isthreaded())
|
||||
return __sys_sigpending(set);
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
return (__sys_sigpending(set));
|
||||
|
||||
crit = _kse_critical_enter();
|
||||
KSE_SCHED_LOCK(curthread->kse, curthread->kseg);
|
||||
|
@ -35,6 +35,7 @@
|
||||
#include <errno.h>
|
||||
#include <pthread.h>
|
||||
#include <string.h>
|
||||
#include <sys/signalvar.h>
|
||||
#include "thr_private.h"
|
||||
|
||||
__weak_reference(__sigsuspend, sigsuspend);
|
||||
@ -46,12 +47,14 @@ _sigsuspend(const sigset_t *set)
|
||||
sigset_t oldmask, newmask;
|
||||
int ret = -1;
|
||||
|
||||
if (!_kse_isthreaded())
|
||||
return __sys_sigsuspend(set);
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
return (__sys_sigsuspend(set));
|
||||
|
||||
/* Check if a new signal set was provided by the caller: */
|
||||
if (set != NULL) {
|
||||
newmask = *set;
|
||||
SIG_CANTMASK(newmask);
|
||||
|
||||
THR_LOCK_SWITCH(curthread);
|
||||
|
||||
|
@ -50,26 +50,18 @@ lib_sigtimedwait(const sigset_t *set, siginfo_t *info,
|
||||
struct pthread *curthread = _get_curthread();
|
||||
int ret = 0;
|
||||
int i;
|
||||
sigset_t tempset, waitset;
|
||||
struct sigaction act;
|
||||
sigset_t waitset;
|
||||
kse_critical_t crit;
|
||||
siginfo_t siginfo;
|
||||
|
||||
if (!_kse_isthreaded()) {
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)) {
|
||||
if (info == NULL)
|
||||
info = &siginfo;
|
||||
return __sys_sigtimedwait((sigset_t *)set, info,
|
||||
(struct timespec *)timeout);
|
||||
return (__sys_sigtimedwait((sigset_t *)set, info,
|
||||
(struct timespec *)timeout));
|
||||
}
|
||||
|
||||
/*
|
||||
* Specify the thread kernel signal handler.
|
||||
*/
|
||||
act.sa_handler = (void (*) ()) _thr_sig_handler;
|
||||
act.sa_flags = SA_RESTART | SA_SIGINFO;
|
||||
/* Ensure the signal handler cannot be interrupted by other signals: */
|
||||
SIGFILLSET(act.sa_mask);
|
||||
|
||||
/*
|
||||
* Initialize the set of signals that will be waited on:
|
||||
*/
|
||||
@ -79,103 +71,60 @@ lib_sigtimedwait(const sigset_t *set, siginfo_t *info,
|
||||
SIGDELSET(waitset, SIGKILL);
|
||||
SIGDELSET(waitset, SIGSTOP);
|
||||
|
||||
crit = _kse_critical_enter();
|
||||
KSE_LOCK_ACQUIRE(curthread->kse, &_thread_signal_lock);
|
||||
|
||||
/*
|
||||
* Enter a loop to find the signals that are SIG_DFL. For
|
||||
* these signals we must install a dummy signal handler in
|
||||
* order for the kernel to pass them in to us. POSIX says
|
||||
* that the _application_ must explicitly install a dummy
|
||||
* handler for signals that are SIG_IGN in order to sigwait
|
||||
* on them. Note that SIG_IGN signals are left in the
|
||||
* mask because a subsequent sigaction could enable an
|
||||
* POSIX says that the _application_ must explicitly install
|
||||
* a dummy handler for signals that are SIG_IGN in order
|
||||
* to sigwait on them. Note that SIG_IGN signals are left in
|
||||
* the mask because a subsequent sigaction could enable an
|
||||
* ignored signal.
|
||||
*/
|
||||
SIGEMPTYSET(tempset);
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(waitset, i) &&
|
||||
(_thread_sigact[i - 1].sa_handler == SIG_DFL)) {
|
||||
_thread_dfl_count[i - 1]++;
|
||||
SIGADDSET(tempset, i);
|
||||
if (_thread_dfl_count[i - 1] == 1) {
|
||||
if (__sys_sigaction(i, &act, NULL) != 0)
|
||||
/* ret = -1 */;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (ret == 0) {
|
||||
/* Done accessing _thread_dfl_count for now. */
|
||||
KSE_LOCK_RELEASE(curthread->kse, &_thread_signal_lock);
|
||||
KSE_SCHED_LOCK(curthread->kse, curthread->kseg);
|
||||
for (i = 1; i <= _SIG_MAXSIG; ++i) {
|
||||
if (SIGISMEMBER(waitset, i) &&
|
||||
SIGISMEMBER(curthread->sigpend, i)) {
|
||||
SIGDELSET(curthread->sigpend, i);
|
||||
siginfo = curthread->siginfo[i - 1];
|
||||
KSE_SCHED_UNLOCK(curthread->kse,
|
||||
curthread->kseg);
|
||||
KSE_LOCK_ACQUIRE(curthread->kse,
|
||||
&_thread_signal_lock);
|
||||
ret = i;
|
||||
goto OUT;
|
||||
}
|
||||
crit = _kse_critical_enter();
|
||||
KSE_SCHED_LOCK(curthread->kse, curthread->kseg);
|
||||
for (i = 1; i <= _SIG_MAXSIG; ++i) {
|
||||
if (SIGISMEMBER(waitset, i) &&
|
||||
SIGISMEMBER(curthread->sigpend, i)) {
|
||||
SIGDELSET(curthread->sigpend, i);
|
||||
siginfo = curthread->siginfo[i - 1];
|
||||
KSE_SCHED_UNLOCK(curthread->kse,
|
||||
curthread->kseg);
|
||||
_kse_critical_leave(crit);
|
||||
ret = i;
|
||||
goto OUT;
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
_thr_set_timeout(timeout);
|
||||
/* Wait for a signal: */
|
||||
curthread->oldsigmask = curthread->sigmask;
|
||||
siginfo.si_signo = 0;
|
||||
curthread->data.sigwaitinfo = &siginfo;
|
||||
SIGFILLSET(curthread->sigmask);
|
||||
SIGSETNAND(curthread->sigmask, waitset);
|
||||
THR_SET_STATE(curthread, PS_SIGWAIT);
|
||||
_thr_sched_switch_unlocked(curthread);
|
||||
/*
|
||||
* Return the signal number to the caller:
|
||||
*/
|
||||
if (siginfo.si_signo > 0) {
|
||||
ret = siginfo.si_signo;
|
||||
} else {
|
||||
if (curthread->interrupted)
|
||||
errno = EINTR;
|
||||
else if (curthread->timeout)
|
||||
errno = EAGAIN;
|
||||
ret = -1;
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
/*
|
||||
* Probably unnecessary, but since it's in a union struct
|
||||
* we don't know how it could be used in the future.
|
||||
*/
|
||||
crit = _kse_critical_enter();
|
||||
curthread->data.sigwaitinfo = NULL;
|
||||
/*
|
||||
* Relock the array of SIG_DFL wait counts.
|
||||
*/
|
||||
KSE_LOCK_ACQUIRE(curthread->kse, &_thread_signal_lock);
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
_thr_set_timeout(timeout);
|
||||
/* Wait for a signal: */
|
||||
curthread->oldsigmask = curthread->sigmask;
|
||||
siginfo.si_signo = 0;
|
||||
curthread->data.sigwaitinfo = &siginfo;
|
||||
SIGFILLSET(curthread->sigmask);
|
||||
SIGSETNAND(curthread->sigmask, waitset);
|
||||
THR_SET_STATE(curthread, PS_SIGWAIT);
|
||||
_thr_sched_switch_unlocked(curthread);
|
||||
/*
|
||||
* Return the signal number to the caller:
|
||||
*/
|
||||
if (siginfo.si_signo > 0) {
|
||||
ret = siginfo.si_signo;
|
||||
} else {
|
||||
if (curthread->interrupted)
|
||||
errno = EINTR;
|
||||
else if (curthread->timeout)
|
||||
errno = EAGAIN;
|
||||
ret = -1;
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
/*
|
||||
* Probably unnecessary, but since it's in a union struct
|
||||
* we don't know how it could be used in the future.
|
||||
*/
|
||||
curthread->data.sigwaitinfo = NULL;
|
||||
|
||||
OUT:
|
||||
/* Restore the sigactions: */
|
||||
act.sa_handler = SIG_DFL;
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(tempset, i)) {
|
||||
_thread_dfl_count[i - 1]--;
|
||||
if ((_thread_sigact[i - 1].sa_handler == SIG_DFL) &&
|
||||
(_thread_dfl_count[i - 1] == 0)) {
|
||||
if (__sys_sigaction(i, &act, NULL) != 0)
|
||||
/* ret = -1 */ ;
|
||||
}
|
||||
}
|
||||
}
|
||||
/* Done accessing _thread_dfl_count. */
|
||||
KSE_LOCK_RELEASE(curthread->kse, &_thread_signal_lock);
|
||||
_kse_critical_leave(crit);
|
||||
|
||||
if (ret > 0 && info != NULL)
|
||||
*info = siginfo;
|
||||
|
||||
|
@ -42,6 +42,9 @@ _sched_yield(void)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
return (__sys_sched_yield());
|
||||
|
||||
/* Reset the accumulated time slice value for the current thread: */
|
||||
curthread->slice_usec = -1;
|
||||
|
||||
@ -57,6 +60,11 @@ _pthread_yield(void)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
__sys_sched_yield();
|
||||
return;
|
||||
}
|
||||
|
||||
/* Reset the accumulated time slice value for the current thread: */
|
||||
curthread->slice_usec = -1;
|
||||
|
||||
|
@ -22,6 +22,10 @@ CFLAGS+=-fno-builtin
|
||||
CFLAGS+=-D_LOCK_DEBUG
|
||||
#CFLAGS+= -g
|
||||
|
||||
# Uncomment this if you want to build a 1:1 threading mode library
|
||||
# however it is no longer strictly conformed to POSIX
|
||||
# CFLAGS+=-DSYSTEM_SCOPE_ONLY
|
||||
|
||||
LDFLAGS= -Wl,--version-script=${.CURDIR}/pthread.map
|
||||
|
||||
# enable extra internal consistancy checks
|
||||
|
@ -63,6 +63,8 @@ sigsuspender (void *arg)
|
||||
|
||||
/* Allow these signals to wake us up during a sigsuspend. */
|
||||
sigfillset (&suspender_mask); /* Default action */
|
||||
sigdelset (&suspender_mask, SIGKILL); /* Cannot catch */
|
||||
sigdelset (&suspender_mask, SIGSTOP); /* Cannot catch */
|
||||
sigdelset (&suspender_mask, SIGINT); /* terminate */
|
||||
sigdelset (&suspender_mask, SIGHUP); /* terminate */
|
||||
sigdelset (&suspender_mask, SIGQUIT); /* create core image */
|
||||
|
@ -107,9 +107,11 @@ _pthread_cancel(pthread_t pthread)
|
||||
/* Ignore - only here to silence -Wall: */
|
||||
break;
|
||||
}
|
||||
if ((pthread->blocked != 0) &&
|
||||
((pthread->cancelflags & THR_AT_CANCEL_POINT) != 0))
|
||||
kse_thr_interrupt(&pthread->tmbx, -1);
|
||||
if ((pthread->cancelflags & THR_AT_CANCEL_POINT) &&
|
||||
(pthread->blocked != 0 ||
|
||||
pthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
kse_thr_interrupt(&pthread->tmbx,
|
||||
KSE_INTR_INTERRUPT, 0);
|
||||
}
|
||||
|
||||
/*
|
||||
|
@ -89,7 +89,7 @@ _thr_setconcurrency(int new_level)
|
||||
/* Race condition, but so what. */
|
||||
kse_count = _kse_initial->k_kseg->kg_ksecount;
|
||||
for (i = kse_count; i < new_level; i++) {
|
||||
newkse = _kse_alloc(curthread);
|
||||
newkse = _kse_alloc(curthread, 0);
|
||||
if (newkse == NULL) {
|
||||
DBG_MSG("Can't alloc new KSE.\n");
|
||||
ret = EAGAIN;
|
||||
|
@ -57,6 +57,7 @@ int _thread_PS_DEAD_value = PS_DEAD;
|
||||
|
||||
static void free_thread(struct pthread *curthread, struct pthread *thread);
|
||||
static int create_stack(struct pthread_attr *pattr);
|
||||
static void free_stack(struct pthread_attr *pattr);
|
||||
static void thread_start(struct pthread *curthread,
|
||||
void *(*start_routine) (void *), void *arg);
|
||||
|
||||
@ -91,7 +92,6 @@ int
|
||||
_pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
void *(*start_routine) (void *), void *arg)
|
||||
{
|
||||
struct kse *curkse;
|
||||
struct pthread *curthread, *new_thread;
|
||||
struct kse *kse = NULL;
|
||||
struct kse_group *kseg = NULL;
|
||||
@ -132,14 +132,16 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
new_thread->attr = _pthread_attr_default;
|
||||
else
|
||||
new_thread->attr = *(*attr);
|
||||
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
new_thread->attr.flags |= PTHREAD_SCOPE_SYSTEM;
|
||||
#endif
|
||||
if (create_stack(&new_thread->attr) != 0) {
|
||||
/* Insufficient memory to create a stack: */
|
||||
ret = EAGAIN;
|
||||
_thr_free(curthread, new_thread);
|
||||
}
|
||||
else if (((new_thread->attr.flags & PTHREAD_SCOPE_SYSTEM) != 0) &&
|
||||
(((kse = _kse_alloc(curthread)) == NULL)
|
||||
(((kse = _kse_alloc(curthread, 1)) == NULL)
|
||||
|| ((kseg = _kseg_alloc(curthread)) == NULL))) {
|
||||
/* Insufficient memory to create a new KSE/KSEG: */
|
||||
ret = EAGAIN;
|
||||
@ -147,15 +149,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
kse->k_mbx.km_flags |= KMF_DONE;
|
||||
_kse_free(curthread, kse);
|
||||
}
|
||||
if ((new_thread->attr.flags & THR_STACK_USER) == 0) {
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
|
||||
/* Stack routines don't use malloc/free. */
|
||||
_thr_stack_free(&new_thread->attr);
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
free_stack(&new_thread->attr);
|
||||
_thr_free(curthread, new_thread);
|
||||
}
|
||||
else {
|
||||
@ -178,9 +172,6 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
new_thread->cancelflags = PTHREAD_CANCEL_ENABLE |
|
||||
PTHREAD_CANCEL_DEFERRED;
|
||||
|
||||
/* Initialize the thread for signals: */
|
||||
new_thread->sigmask = curthread->sigmask;
|
||||
|
||||
/* No thread is wanting to join to this one: */
|
||||
new_thread->joiner = NULL;
|
||||
|
||||
@ -193,6 +184,8 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
*/
|
||||
crit = _kse_critical_enter();
|
||||
THR_GETCONTEXT(&new_thread->tmbx.tm_context);
|
||||
/* Initialize the thread for signals: */
|
||||
new_thread->sigmask = curthread->sigmask;
|
||||
_kse_critical_leave(crit);
|
||||
new_thread->tmbx.tm_udata = new_thread;
|
||||
new_thread->tmbx.tm_context.uc_sigmask =
|
||||
@ -278,9 +271,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
}
|
||||
else {
|
||||
kse->k_curthread = NULL;
|
||||
#ifdef NOT_YET
|
||||
kse->k_kseg->kg_flags |= KGF_SINGLE_THREAD;
|
||||
#endif
|
||||
new_thread->kse = kse;
|
||||
new_thread->kseg = kse->k_kseg;
|
||||
kse->k_mbx.km_udata = kse;
|
||||
@ -308,6 +299,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
|
||||
static void
|
||||
free_thread(struct pthread *curthread, struct pthread *thread)
|
||||
{
|
||||
free_stack(&thread->attr);
|
||||
if ((thread->attr.flags & PTHREAD_SCOPE_SYSTEM) != 0) {
|
||||
/* Free the KSE and KSEG. */
|
||||
_kseg_free(thread->kseg);
|
||||
@ -332,6 +324,22 @@ create_stack(struct pthread_attr *pattr)
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static void
|
||||
free_stack(struct pthread_attr *pattr)
|
||||
{
|
||||
struct kse *curkse;
|
||||
kse_critical_t crit;
|
||||
|
||||
if ((pattr->flags & THR_STACK_USER) == 0) {
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
|
||||
/* Stack routines don't use malloc/free. */
|
||||
_thr_stack_free(pattr);
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
thread_start(struct pthread *curthread, void *(*start_routine) (void *),
|
||||
|
@ -56,19 +56,17 @@ _thr_ref_add(struct pthread *curthread, struct pthread *thread,
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
|
||||
TAILQ_FOREACH(pthread, &_thread_list, tle) {
|
||||
if (pthread == thread) {
|
||||
if ((include_dead == 0) &&
|
||||
((pthread->state == PS_DEAD) ||
|
||||
((pthread->state == PS_DEADLOCK) ||
|
||||
((pthread->flags & THR_FLAGS_EXITING) != 0))))
|
||||
pthread = NULL;
|
||||
else {
|
||||
thread->refcount++;
|
||||
if (curthread != NULL)
|
||||
curthread->critical_count++;
|
||||
}
|
||||
break;
|
||||
pthread = _thr_hash_find(thread);
|
||||
if (pthread) {
|
||||
if ((include_dead == 0) &&
|
||||
((pthread->state == PS_DEAD) ||
|
||||
((pthread->state == PS_DEADLOCK) ||
|
||||
((pthread->flags & THR_FLAGS_EXITING) != 0))))
|
||||
pthread = NULL;
|
||||
else {
|
||||
pthread->refcount++;
|
||||
if (curthread != NULL)
|
||||
curthread->critical_count++;
|
||||
}
|
||||
}
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
|
@ -259,12 +259,19 @@ _libpthread_init(struct pthread *curthread)
|
||||
_kse_init();
|
||||
|
||||
/* Initialize the initial kse and kseg. */
|
||||
_kse_initial = _kse_alloc(NULL);
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
_kse_initial = _kse_alloc(NULL, 1);
|
||||
#else
|
||||
_kse_initial = _kse_alloc(NULL, 0);
|
||||
#endif
|
||||
if (_kse_initial == NULL)
|
||||
PANIC("Can't allocate initial kse.");
|
||||
_kse_initial->k_kseg = _kseg_alloc(NULL);
|
||||
if (_kse_initial->k_kseg == NULL)
|
||||
PANIC("Can't allocate initial kseg.");
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
_kse_initial->k_kseg->kg_flags |= KGF_SINGLE_THREAD;
|
||||
#endif
|
||||
_kse_initial->k_schedq = &_kse_initial->k_kseg->kg_schedq;
|
||||
|
||||
TAILQ_INSERT_TAIL(&_kse_initial->k_kseg->kg_kseq, _kse_initial, k_kgqe);
|
||||
@ -326,7 +333,9 @@ init_main_thread(struct pthread *thread)
|
||||
|
||||
/* Setup the thread attributes. */
|
||||
thread->attr = _pthread_attr_default;
|
||||
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
thread->attr.flags |= PTHREAD_SCOPE_SYSTEM;
|
||||
#endif
|
||||
/*
|
||||
* Set up the thread stack.
|
||||
*
|
||||
@ -463,9 +472,6 @@ init_private(void)
|
||||
TAILQ_INIT(&_thread_list);
|
||||
TAILQ_INIT(&_thread_gc_list);
|
||||
|
||||
/* Initialize the SIG_DFL dummy handler count. */
|
||||
bzero(_thread_dfl_count, sizeof(_thread_dfl_count));
|
||||
|
||||
/*
|
||||
* Initialize the lock for temporary installation of signal
|
||||
* handlers (to support sigwait() semantics) and for the
|
||||
|
@ -120,6 +120,10 @@ static int active_kse_count = 0;
|
||||
static int active_kseg_count = 0;
|
||||
static u_int64_t next_uniqueid = 1;
|
||||
|
||||
LIST_HEAD(thread_hash_head, pthread);
|
||||
#define THREAD_HASH_QUEUES 127
|
||||
static struct thread_hash_head thr_hashtable[THREAD_HASH_QUEUES];
|
||||
#define THREAD_HASH(thrd) ((unsigned long)thrd % THREAD_HASH_QUEUES)
|
||||
|
||||
#ifdef DEBUG_THREAD_KERN
|
||||
static void dump_queues(struct kse *curkse);
|
||||
@ -127,13 +131,11 @@ static void dump_queues(struct kse *curkse);
|
||||
static void kse_check_completed(struct kse *kse);
|
||||
static void kse_check_waitq(struct kse *kse);
|
||||
static void kse_fini(struct kse *curkse);
|
||||
static void kse_reinit(struct kse *kse);
|
||||
static void kse_reinit(struct kse *kse, int sys_scope);
|
||||
static void kse_sched_multi(struct kse *curkse);
|
||||
#ifdef NOT_YET
|
||||
static void kse_sched_single(struct kse *curkse);
|
||||
#endif
|
||||
static void kse_switchout_thread(struct kse *kse, struct pthread *thread);
|
||||
static void kse_wait(struct kse *kse, struct pthread *td_wait);
|
||||
static void kse_wait(struct kse *kse, struct pthread *td_wait, int sigseq);
|
||||
static void kse_free_unlocked(struct kse *kse);
|
||||
static void kseg_free_unlocked(struct kse_group *kseg);
|
||||
static void kseg_init(struct kse_group *kseg);
|
||||
@ -385,16 +387,30 @@ _kse_setthreaded(int threaded)
|
||||
*/
|
||||
_thr_signal_init();
|
||||
_kse_initial->k_flags |= KF_STARTED;
|
||||
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
/*
|
||||
* For bound thread, kernel reads mailbox pointer once,
|
||||
* we'd set it here before calling kse_create
|
||||
*/
|
||||
KSE_SET_MBOX(_kse_initial, _thr_initial);
|
||||
_kse_initial->k_mbx.km_flags |= KMF_BOUND;
|
||||
#endif
|
||||
|
||||
if (kse_create(&_kse_initial->k_mbx, 0) != 0) {
|
||||
_kse_initial->k_flags &= ~KF_STARTED;
|
||||
__isthreaded = 0;
|
||||
/* may abort() */
|
||||
PANIC("kse_create() failed\n");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
/* Set current thread to initial thread */
|
||||
KSE_SET_MBOX(_kse_initial, _thr_initial);
|
||||
_thr_start_sig_daemon();
|
||||
_thr_setmaxconcurrency();
|
||||
#endif
|
||||
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
@ -592,7 +608,9 @@ _thr_sched_switch_unlocked(struct pthread *curthread)
|
||||
* instead of the next thread in the run queue, but
|
||||
* we don't bother checking for that.
|
||||
*/
|
||||
if ((curthread->state == PS_DEAD) ||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
kse_sched_single(curkse);
|
||||
else if ((curthread->state == PS_DEAD) ||
|
||||
(((td = KSE_RUNQ_FIRST(curkse)) == NULL) &&
|
||||
(curthread->state != PS_RUNNING)) ||
|
||||
((td != NULL) && (td->lock_switch == 0))) {
|
||||
@ -693,30 +711,34 @@ _thr_sched_switch_unlocked(struct pthread *curthread)
|
||||
* KSE, but we use a separate scheduler so that it can be fine-tuned
|
||||
* to be more efficient (and perhaps not need a separate stack for
|
||||
* the KSE, allowing it to use the thread's stack).
|
||||
*
|
||||
* XXX - This probably needs some work.
|
||||
*/
|
||||
#ifdef NOT_YET
|
||||
|
||||
static void
|
||||
kse_sched_single(struct kse *curkse)
|
||||
{
|
||||
struct pthread *curthread = curkse->k_curthread;
|
||||
struct pthread *td_wait;
|
||||
struct timespec ts;
|
||||
int level;
|
||||
sigset_t sigmask;
|
||||
int i, sigseqno, level, first = 0;
|
||||
|
||||
if (curthread->active == 0) {
|
||||
if (curthread->state != PS_RUNNING) {
|
||||
/* Check to see if the thread has timed out. */
|
||||
KSE_GET_TOD(curkse, &ts);
|
||||
if (thr_timedout(curthread, &ts) != 0) {
|
||||
curthread->timeout = 1;
|
||||
curthread->state = PS_RUNNING;
|
||||
}
|
||||
}
|
||||
}
|
||||
if ((curkse->k_flags & KF_INITIALIZED) == 0) {
|
||||
/* Setup this KSEs specific data. */
|
||||
_ksd_setprivate(&curkse->k_ksd);
|
||||
_set_curkse(curkse);
|
||||
curkse->k_flags |= KF_INITIALIZED;
|
||||
first = 1;
|
||||
curthread->active = 1;
|
||||
|
||||
/* Setup kernel signal masks for new thread. */
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
|
||||
/*
|
||||
* Enter critical region, this is meanless for bound thread,
|
||||
* It is used to let other code work, those code want mailbox
|
||||
* to be cleared.
|
||||
*/
|
||||
_kse_critical_enter();
|
||||
}
|
||||
|
||||
/* This thread no longer needs to yield the CPU: */
|
||||
curthread->critical_yield = 0;
|
||||
curthread->need_switchout = 0;
|
||||
|
||||
@ -726,7 +748,8 @@ kse_sched_single(struct kse *curkse)
|
||||
* There is no scheduling queue for single threaded KSEs,
|
||||
* but we need a lock for protection regardless.
|
||||
*/
|
||||
KSE_SCHED_LOCK(curkse, curkse->k_kseg);
|
||||
if (curthread->lock_switch == 0)
|
||||
KSE_SCHED_LOCK(curkse, curkse->k_kseg);
|
||||
|
||||
/*
|
||||
* This has to do the job of kse_switchout_thread(), only
|
||||
@ -735,33 +758,46 @@ kse_sched_single(struct kse *curkse)
|
||||
|
||||
switch (curthread->state) {
|
||||
case PS_DEAD:
|
||||
curthread->check_pending = 0;
|
||||
/* Unlock the scheduling queue and exit the KSE and thread. */
|
||||
thr_cleaup(curkse, curthread);
|
||||
thr_cleanup(curkse, curthread);
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
PANIC("bound thread shouldn't get here\n");
|
||||
break;
|
||||
|
||||
case PS_COND_WAIT:
|
||||
case PS_SIGWAIT:
|
||||
PANIC("bound thread does not have SIGWAIT state\n");
|
||||
|
||||
case PS_SLEEP_WAIT:
|
||||
/* Only insert threads that can timeout: */
|
||||
if (curthread->wakeup_time.tv_sec != -1) {
|
||||
/* Insert into the waiting queue: */
|
||||
KSE_WAITQ_INSERT(curkse, curthread);
|
||||
}
|
||||
PANIC("bound thread does not have SLEEP_WAIT state\n");
|
||||
|
||||
case PS_SIGSUSPEND:
|
||||
PANIC("bound thread does not have SIGSUSPEND state\n");
|
||||
|
||||
case PS_COND_WAIT:
|
||||
break;
|
||||
|
||||
case PS_LOCKWAIT:
|
||||
/*
|
||||
* This state doesn't timeout.
|
||||
*/
|
||||
curthread->wakeup_time.tv_sec = -1;
|
||||
curthread->wakeup_time.tv_nsec = -1;
|
||||
level = curthread->locklevel - 1;
|
||||
if (!_LCK_GRANTED(&curthread->lockusers[level]))
|
||||
KSE_WAITQ_INSERT(curkse, curthread);
|
||||
else
|
||||
if (_LCK_GRANTED(&curthread->lockusers[level]))
|
||||
THR_SET_STATE(curthread, PS_RUNNING);
|
||||
break;
|
||||
|
||||
case PS_RUNNING:
|
||||
if ((curthread->flags & THR_FLAGS_SUSPENDED) != 0) {
|
||||
THR_SET_STATE(curthread, PS_SUSPENDED);
|
||||
}
|
||||
curthread->wakeup_time.tv_sec = -1;
|
||||
curthread->wakeup_time.tv_nsec = -1;
|
||||
break;
|
||||
|
||||
case PS_JOIN:
|
||||
case PS_MUTEX_WAIT:
|
||||
case PS_RUNNING:
|
||||
case PS_SIGSUSPEND:
|
||||
case PS_SIGWAIT:
|
||||
case PS_SUSPENDED:
|
||||
case PS_DEADLOCK:
|
||||
default:
|
||||
@ -769,41 +805,66 @@ kse_sched_single(struct kse *curkse)
|
||||
* These states don't timeout and don't need
|
||||
* to be in the waiting queue.
|
||||
*/
|
||||
curthread->wakeup_time.tv_sec = -1;
|
||||
curthread->wakeup_time.tv_nsec = -1;
|
||||
break;
|
||||
}
|
||||
|
||||
while (curthread->state != PS_RUNNING) {
|
||||
curthread->active = 0;
|
||||
td_wait = KSE_WAITQ_FIRST(curkse);
|
||||
sigseqno = curkse->k_sigseqno;
|
||||
if (curthread->check_pending != 0) {
|
||||
/*
|
||||
* Install pending signals into the frame, possible
|
||||
* cause mutex or condvar backout.
|
||||
*/
|
||||
curthread->check_pending = 0;
|
||||
SIGFILLSET(sigmask);
|
||||
|
||||
kse_wait(curkse, td_wait);
|
||||
|
||||
if (td_wait != NULL) {
|
||||
KSE_GET_TOD(curkse, &ts);
|
||||
if (thr_timedout(curthread, &ts)) {
|
||||
/* Indicate the thread timedout: */
|
||||
td_wait->timeout = 1;
|
||||
|
||||
/* Make the thread runnable. */
|
||||
THR_SET_STATE(td_wait, PS_RUNNING);
|
||||
KSE_WAITQ_REMOVE(curkse, td_wait);
|
||||
/*
|
||||
* Lock out kernel signal code when we are processing
|
||||
* signals, and get a fresh copy of signal mask.
|
||||
*/
|
||||
__sys_sigprocmask(SIG_SETMASK, &sigmask,
|
||||
&curthread->sigmask);
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(curthread->sigmask, i))
|
||||
continue;
|
||||
if (SIGISMEMBER(curthread->sigpend, i))
|
||||
_thr_sig_add(curthread, i,
|
||||
&curthread->siginfo[i-1]);
|
||||
}
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask,
|
||||
NULL);
|
||||
/* The above code might make thread runnable */
|
||||
if (curthread->state == PS_RUNNING)
|
||||
break;
|
||||
}
|
||||
THR_DEACTIVATE_LAST_LOCK(curthread);
|
||||
kse_wait(curkse, curthread, sigseqno);
|
||||
THR_ACTIVATE_LAST_LOCK(curthread);
|
||||
KSE_GET_TOD(curkse, &ts);
|
||||
if (thr_timedout(curthread, &ts)) {
|
||||
/* Indicate the thread timedout: */
|
||||
curthread->timeout = 1;
|
||||
/* Make the thread runnable. */
|
||||
THR_SET_STATE(curthread, PS_RUNNING);
|
||||
}
|
||||
}
|
||||
|
||||
/* Remove the frame reference. */
|
||||
curthread->curframe = NULL;
|
||||
|
||||
/* Unlock the scheduling queue. */
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
if (curthread->lock_switch == 0) {
|
||||
/* Unlock the scheduling queue. */
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
}
|
||||
|
||||
/*
|
||||
* Continue the thread at its current frame:
|
||||
*/
|
||||
DBG_MSG("Continuing bound thread %p\n", curthread);
|
||||
_thread_switch(&curthread->tmbx, &curkse->k_mbx.km_curthread);
|
||||
PANIC("Thread has returned from _thread_switch");
|
||||
if (first) {
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
pthread_exit(curthread->start_routine(curthread->arg));
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef DEBUG_THREAD_KERN
|
||||
static void
|
||||
@ -929,7 +990,7 @@ kse_sched_multi(struct kse *curkse)
|
||||
* no more threads.
|
||||
*/
|
||||
td_wait = KSE_WAITQ_FIRST(curkse);
|
||||
kse_wait(curkse, td_wait);
|
||||
kse_wait(curkse, td_wait, 0);
|
||||
kse_check_completed(curkse);
|
||||
kse_check_waitq(curkse);
|
||||
}
|
||||
@ -1003,8 +1064,8 @@ kse_sched_multi(struct kse *curkse)
|
||||
signalcontext(&curthread->tmbx.tm_context, 0,
|
||||
(__sighandler_t *)thr_resume_wrapper);
|
||||
#else
|
||||
if ((curframe == NULL) && (curthread->check_pending != 0) &&
|
||||
!THR_IN_CRITICAL(curthread)) {
|
||||
if ((curframe == NULL) && (curthread->state == PS_RUNNING) &&
|
||||
(curthread->check_pending != 0) && !THR_IN_CRITICAL(curthread)) {
|
||||
curthread->check_pending = 0;
|
||||
signalcontext(&curthread->tmbx.tm_context, 0,
|
||||
(__sighandler_t *)thr_resume_wrapper);
|
||||
@ -1129,7 +1190,11 @@ thr_cleanup(struct kse *curkse, struct pthread *thread)
|
||||
THR_GCLIST_ADD(thread);
|
||||
/* Use thread_list_lock */
|
||||
active_threads--;
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
if (active_threads == 0) {
|
||||
#else
|
||||
if (active_threads == 1) {
|
||||
#endif
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
exit(0);
|
||||
}
|
||||
@ -1139,7 +1204,10 @@ thr_cleanup(struct kse *curkse, struct pthread *thread)
|
||||
* System scope thread is single thread group,
|
||||
* when thread is exited, its kse and ksegrp should
|
||||
* be recycled as well.
|
||||
* kse upcall stack belongs to thread, clear it here.
|
||||
*/
|
||||
curkse->k_stack.ss_sp = 0;
|
||||
curkse->k_stack.ss_size = 0;
|
||||
kse_exit();
|
||||
PANIC("kse_exit() failed for system scope thread");
|
||||
}
|
||||
@ -1239,30 +1307,30 @@ _thr_schedule_add(struct pthread *curthread, struct pthread *newthread)
|
||||
* the mailbox is set for the current thread.
|
||||
*/
|
||||
if ((newthread->attr.flags & PTHREAD_SCOPE_SYSTEM) != 0) {
|
||||
#ifdef NOT_YET
|
||||
/* We use the thread's stack as the KSE's stack. */
|
||||
new_thread->kse->k_mbx.km_stack.ss_sp =
|
||||
new_thread->attr.stackaddr_attr;
|
||||
new_thread->kse->k_mbx.km_stack.ss_size =
|
||||
new_thread->attr.stacksize_attr;
|
||||
#endif
|
||||
newthread->kse->k_mbx.km_stack.ss_sp =
|
||||
newthread->attr.stackaddr_attr;
|
||||
newthread->kse->k_mbx.km_stack.ss_size =
|
||||
newthread->attr.stacksize_attr;
|
||||
|
||||
/*
|
||||
* No need to lock the scheduling queue since the
|
||||
* KSE/KSEG pair have not yet been started.
|
||||
*/
|
||||
KSEG_THRQ_ADD(newthread->kseg, newthread);
|
||||
if (newthread->state == PS_RUNNING)
|
||||
THR_RUNQ_INSERT_TAIL(newthread);
|
||||
newthread->kse->k_curthread = NULL;
|
||||
newthread->kse->k_mbx.km_flags = 0;
|
||||
newthread->kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
/* this thread never gives up kse */
|
||||
newthread->active = 1;
|
||||
newthread->kse->k_curthread = newthread;
|
||||
newthread->kse->k_mbx.km_flags = KMF_BOUND;
|
||||
newthread->kse->k_mbx.km_func = (kse_func_t *)kse_sched_single;
|
||||
newthread->kse->k_mbx.km_quantum = 0;
|
||||
|
||||
KSE_SET_MBOX(newthread->kse, newthread);
|
||||
/*
|
||||
* This thread needs a new KSE and KSEG.
|
||||
*/
|
||||
newthread->kse->k_flags &= ~KF_INITIALIZED;
|
||||
newthread->kse->k_flags |= KF_STARTED;
|
||||
/* Fire up! */
|
||||
ret = kse_create(&newthread->kse->k_mbx, 1);
|
||||
if (ret != 0)
|
||||
ret = errno;
|
||||
@ -1492,7 +1560,7 @@ kse_switchout_thread(struct kse *kse, struct pthread *thread)
|
||||
!SIGISMEMBER(thread->sigmask, i)) {
|
||||
restart = _thread_sigact[1 - 1].sa_flags & SA_RESTART;
|
||||
kse_thr_interrupt(&thread->tmbx,
|
||||
restart ? -2 : -1);
|
||||
restart ? KSE_INTR_RESTART : KSE_INTR_INTERRUPT, 0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -1617,7 +1685,7 @@ kse_switchout_thread(struct kse *kse, struct pthread *thread)
|
||||
* This must be called with the scheduling lock held.
|
||||
*/
|
||||
static void
|
||||
kse_wait(struct kse *kse, struct pthread *td_wait)
|
||||
kse_wait(struct kse *kse, struct pthread *td_wait, int sigseqno)
|
||||
{
|
||||
struct timespec ts, ts_sleep;
|
||||
int saved_flags;
|
||||
@ -1640,10 +1708,15 @@ kse_wait(struct kse *kse, struct pthread *td_wait)
|
||||
KSE_SET_IDLE(kse);
|
||||
kse->k_kseg->kg_idle_kses++;
|
||||
KSE_SCHED_UNLOCK(kse, kse->k_kseg);
|
||||
saved_flags = kse->k_mbx.km_flags;
|
||||
kse->k_mbx.km_flags |= KMF_NOUPCALL;
|
||||
kse_release(&ts_sleep);
|
||||
kse->k_mbx.km_flags = saved_flags;
|
||||
if ((kse->k_kseg->kg_flags & KGF_SINGLE_THREAD) &&
|
||||
(kse->k_sigseqno != sigseqno))
|
||||
; /* don't sleep */
|
||||
else {
|
||||
saved_flags = kse->k_mbx.km_flags;
|
||||
kse->k_mbx.km_flags |= KMF_NOUPCALL;
|
||||
kse_release(&ts_sleep);
|
||||
kse->k_mbx.km_flags = saved_flags;
|
||||
}
|
||||
KSE_SCHED_LOCK(kse, kse->k_kseg);
|
||||
if (KSE_IS_IDLE(kse)) {
|
||||
KSE_CLEAR_IDLE(kse);
|
||||
@ -1965,7 +2038,7 @@ _kseg_free(struct kse_group *kseg)
|
||||
* In this case, we don't need to (and can't) take any locks.
|
||||
*/
|
||||
struct kse *
|
||||
_kse_alloc(struct pthread *curthread)
|
||||
_kse_alloc(struct pthread *curthread, int sys_scope)
|
||||
{
|
||||
struct kse *kse = NULL;
|
||||
kse_critical_t crit;
|
||||
@ -1991,7 +2064,7 @@ _kse_alloc(struct pthread *curthread)
|
||||
KSE_LOCK_RELEASE(curthread->kse, &kse_lock);
|
||||
_kse_critical_leave(crit);
|
||||
if (kse != NULL)
|
||||
kse_reinit(kse);
|
||||
kse_reinit(kse, sys_scope);
|
||||
}
|
||||
if ((kse == NULL) &&
|
||||
((kse = (struct kse *)malloc(sizeof(*kse))) != NULL)) {
|
||||
@ -2009,16 +2082,16 @@ _kse_alloc(struct pthread *curthread)
|
||||
|
||||
/*
|
||||
* Create the KSE context.
|
||||
*
|
||||
* XXX - For now this is done here in the allocation.
|
||||
* In the future, we may want to have it done
|
||||
* outside the allocation so that scope system
|
||||
* threads (one thread per KSE) are not required
|
||||
* to have a stack for an unneeded kse upcall.
|
||||
* Scope system threads (one thread per KSE) are not required
|
||||
* to have a stack for an unneeded kse upcall.
|
||||
*/
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
kse->k_mbx.km_stack.ss_sp = (char *)malloc(KSE_STACKSIZE);
|
||||
kse->k_mbx.km_stack.ss_size = KSE_STACKSIZE;
|
||||
if (!sys_scope) {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
kse->k_stack.ss_sp = (char *) malloc(KSE_STACKSIZE);
|
||||
kse->k_stack.ss_size = KSE_STACKSIZE;
|
||||
} else {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_single;
|
||||
}
|
||||
kse->k_mbx.km_udata = (void *)kse;
|
||||
kse->k_mbx.km_quantum = 20000;
|
||||
/*
|
||||
@ -2026,9 +2099,8 @@ _kse_alloc(struct pthread *curthread)
|
||||
* doesn't get used; a KSE running a scope system
|
||||
* thread will use that thread's stack.
|
||||
*/
|
||||
kse->k_stack.ss_sp = kse->k_mbx.km_stack.ss_sp;
|
||||
kse->k_stack.ss_size = kse->k_mbx.km_stack.ss_size;
|
||||
if (kse->k_mbx.km_stack.ss_sp == NULL) {
|
||||
kse->k_mbx.km_stack = kse->k_stack;
|
||||
if (!sys_scope && kse->k_stack.ss_sp == NULL) {
|
||||
for (i = 0; i < MAX_KSE_LOCKLEVEL; i++) {
|
||||
_lockuser_destroy(&kse->k_lockusers[i]);
|
||||
}
|
||||
@ -2049,7 +2121,8 @@ _kse_alloc(struct pthread *curthread)
|
||||
KSE_LOCK_RELEASE(curthread->kse, &kse_lock);
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
free(kse->k_mbx.km_stack.ss_sp);
|
||||
if (kse->k_stack.ss_sp)
|
||||
free(kse->k_stack.ss_sp);
|
||||
for (i = 0; i < MAX_KSE_LOCKLEVEL; i++) {
|
||||
_lockuser_destroy(&kse->k_lockusers[i]);
|
||||
}
|
||||
@ -2068,15 +2141,27 @@ _kse_alloc(struct pthread *curthread)
|
||||
}
|
||||
|
||||
static void
|
||||
kse_reinit(struct kse *kse)
|
||||
kse_reinit(struct kse *kse, int sys_scope)
|
||||
{
|
||||
/*
|
||||
* XXX - For now every kse has its stack.
|
||||
* In the future, we may want to have it done
|
||||
* outside the allocation so that scope system
|
||||
* threads (one thread per KSE) are not required
|
||||
* to have a stack for an unneeded kse upcall.
|
||||
*/
|
||||
if (!sys_scope) {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_multi;
|
||||
if (kse->k_stack.ss_sp == NULL) {
|
||||
/* XXX check allocation failure */
|
||||
kse->k_stack.ss_sp = (char *) malloc(KSE_STACKSIZE);
|
||||
kse->k_stack.ss_size = KSE_STACKSIZE;
|
||||
}
|
||||
kse->k_mbx.km_quantum = 20000;
|
||||
} else {
|
||||
kse->k_mbx.km_func = (kse_func_t *)kse_sched_single;
|
||||
if (kse->k_stack.ss_sp)
|
||||
free(kse->k_stack.ss_sp);
|
||||
kse->k_stack.ss_sp = NULL;
|
||||
kse->k_stack.ss_size = 0;
|
||||
kse->k_mbx.km_quantum = 0;
|
||||
}
|
||||
kse->k_mbx.km_stack = kse->k_stack;
|
||||
kse->k_mbx.km_udata = (void *)kse;
|
||||
kse->k_mbx.km_curthread = NULL;
|
||||
kse->k_mbx.km_flags = 0;
|
||||
kse->k_curthread = 0;
|
||||
kse->k_kseg = 0;
|
||||
@ -2092,6 +2177,7 @@ kse_reinit(struct kse *kse)
|
||||
kse->k_cpu = 0;
|
||||
kse->k_done = 0;
|
||||
kse->k_switch = 0;
|
||||
kse->k_sigseqno = 0;
|
||||
}
|
||||
|
||||
void
|
||||
@ -2226,7 +2312,6 @@ thr_link(struct pthread *thread)
|
||||
THR_LIST_ADD(thread);
|
||||
active_threads++;
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
|
||||
@ -2241,11 +2326,39 @@ thr_unlink(struct pthread *thread)
|
||||
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_list_lock);
|
||||
THR_LIST_REMOVE(thread);
|
||||
active_threads--;
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
|
||||
_kse_critical_leave(crit);
|
||||
}
|
||||
|
||||
void
|
||||
_thr_hash_add(struct pthread *thread)
|
||||
{
|
||||
struct thread_hash_head *head;
|
||||
|
||||
head = &thr_hashtable[THREAD_HASH(thread)];
|
||||
LIST_INSERT_HEAD(head, thread, hle);
|
||||
}
|
||||
|
||||
void
|
||||
_thr_hash_remove(struct pthread *thread)
|
||||
{
|
||||
LIST_REMOVE(thread, hle);
|
||||
}
|
||||
|
||||
struct pthread *
|
||||
_thr_hash_find(struct pthread *thread)
|
||||
{
|
||||
struct pthread *td;
|
||||
struct thread_hash_head *head;
|
||||
|
||||
head = &thr_hashtable[THREAD_HASH(thread)];
|
||||
LIST_FOREACH(td, head, hle) {
|
||||
if (td == thread)
|
||||
return (thread);
|
||||
}
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
|
@ -55,8 +55,9 @@ _nanosleep(const struct timespec *time_to_sleep,
|
||||
errno = EINVAL;
|
||||
ret = -1;
|
||||
} else {
|
||||
if (!_kse_isthreaded())
|
||||
return __sys_nanosleep(time_to_sleep, time_remaining);
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
return (__sys_nanosleep(time_to_sleep, time_remaining));
|
||||
|
||||
KSE_GET_TOD(curthread->kse, &ts);
|
||||
|
||||
|
@ -202,6 +202,7 @@ struct kse {
|
||||
int k_cpu; /* CPU ID when bound */
|
||||
int k_done; /* this KSE is done */
|
||||
int k_switch; /* thread switch in UTS */
|
||||
int k_sigseqno; /* signal buffered count */
|
||||
};
|
||||
|
||||
/*
|
||||
@ -615,6 +616,9 @@ struct pthread {
|
||||
/* Queue entry for GC lists: */
|
||||
TAILQ_ENTRY(pthread) gcle;
|
||||
|
||||
/* Hash queue entry */
|
||||
LIST_ENTRY(pthread) hle;
|
||||
|
||||
/*
|
||||
* Lock for accesses to this thread structure.
|
||||
*/
|
||||
@ -662,7 +666,7 @@ struct pthread {
|
||||
sigset_t oldsigmask;
|
||||
sigset_t sigmask;
|
||||
sigset_t sigpend;
|
||||
int check_pending;
|
||||
volatile int check_pending;
|
||||
int refcount;
|
||||
|
||||
/* Thread state: */
|
||||
@ -894,12 +898,14 @@ do { \
|
||||
#define THR_LIST_ADD(thrd) do { \
|
||||
if (((thrd)->flags & THR_FLAGS_IN_TDLIST) == 0) { \
|
||||
TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \
|
||||
_thr_hash_add(thrd); \
|
||||
(thrd)->flags |= THR_FLAGS_IN_TDLIST; \
|
||||
} \
|
||||
} while (0)
|
||||
#define THR_LIST_REMOVE(thrd) do { \
|
||||
if (((thrd)->flags & THR_FLAGS_IN_TDLIST) != 0) { \
|
||||
TAILQ_REMOVE(&_thread_list, thrd, tle); \
|
||||
_thr_hash_remove(thrd); \
|
||||
(thrd)->flags &= ~THR_FLAGS_IN_TDLIST; \
|
||||
} \
|
||||
} while (0)
|
||||
@ -1000,13 +1006,6 @@ SCLASS int _clock_res_usec SCLASS_PRESET(CLOCK_RES_USEC);
|
||||
/* Array of signal actions for this process: */
|
||||
SCLASS struct sigaction _thread_sigact[_SIG_MAXSIG];
|
||||
|
||||
/*
|
||||
* Array of counts of dummy handlers for SIG_DFL signals. This is used to
|
||||
* assure that there is always a dummy signal handler installed while there
|
||||
* is a thread sigwait()ing on the corresponding signal.
|
||||
*/
|
||||
SCLASS int _thread_dfl_count[_SIG_MAXSIG];
|
||||
|
||||
/*
|
||||
* Lock for above count of dummy handlers and for the process signal
|
||||
* mask and pending signal sets.
|
||||
@ -1047,7 +1046,7 @@ void _cond_wait_backout(struct pthread *);
|
||||
struct pthread *_get_curthread(void);
|
||||
struct kse *_get_curkse(void);
|
||||
void _set_curkse(struct kse *);
|
||||
struct kse *_kse_alloc(struct pthread *);
|
||||
struct kse *_kse_alloc(struct pthread *, int sys_scope);
|
||||
kse_critical_t _kse_critical_enter(void);
|
||||
void _kse_critical_leave(kse_critical_t);
|
||||
int _kse_in_critical(void);
|
||||
@ -1131,11 +1130,16 @@ void _thr_enter_cancellation_point(struct pthread *);
|
||||
void _thr_leave_cancellation_point(struct pthread *);
|
||||
int _thr_setconcurrency(int new_level);
|
||||
int _thr_setmaxconcurrency(void);
|
||||
void _thr_critical_enter(struct pthread *);
|
||||
void _thr_critical_leave(struct pthread *);
|
||||
int _thr_start_sig_daemon(void);
|
||||
int _thr_getprocsig(int sig, siginfo_t *siginfo);
|
||||
int _thr_getprocsig_unlocked(int sig, siginfo_t *siginfo);
|
||||
void _thr_signal_init(void);
|
||||
void _thr_signal_deinit(void);
|
||||
void _thr_hash_add(struct pthread *);
|
||||
void _thr_hash_remove(struct pthread *);
|
||||
struct pthread *_thr_hash_find(struct pthread *);
|
||||
|
||||
/*
|
||||
* Aliases for _pthread functions. Should be called instead of
|
||||
|
@ -45,16 +45,55 @@
|
||||
|
||||
/* Prototypes: */
|
||||
static void build_siginfo(siginfo_t *info, int signo);
|
||||
static void thr_sig_check_state(struct pthread *pthread, int sig);
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
static struct pthread *thr_sig_find(struct kse *curkse, int sig,
|
||||
siginfo_t *info);
|
||||
static void handle_special_signals(struct kse *curkse, int sig);
|
||||
#endif
|
||||
static void thr_sigframe_add(struct pthread *thread);
|
||||
static void thr_sigframe_restore(struct pthread *thread,
|
||||
struct pthread_sigframe *psf);
|
||||
static void thr_sigframe_save(struct pthread *thread,
|
||||
struct pthread_sigframe *psf);
|
||||
|
||||
#define SA_KILL 0x01 /* terminates process by default */
|
||||
#define SA_STOP 0x02
|
||||
#define SA_CONT 0x04
|
||||
|
||||
static int sigproptbl[NSIG] = {
|
||||
SA_KILL, /* SIGHUP */
|
||||
SA_KILL, /* SIGINT */
|
||||
SA_KILL, /* SIGQUIT */
|
||||
SA_KILL, /* SIGILL */
|
||||
SA_KILL, /* SIGTRAP */
|
||||
SA_KILL, /* SIGABRT */
|
||||
SA_KILL, /* SIGEMT */
|
||||
SA_KILL, /* SIGFPE */
|
||||
SA_KILL, /* SIGKILL */
|
||||
SA_KILL, /* SIGBUS */
|
||||
SA_KILL, /* SIGSEGV */
|
||||
SA_KILL, /* SIGSYS */
|
||||
SA_KILL, /* SIGPIPE */
|
||||
SA_KILL, /* SIGALRM */
|
||||
SA_KILL, /* SIGTERM */
|
||||
0, /* SIGURG */
|
||||
SA_STOP, /* SIGSTOP */
|
||||
SA_STOP, /* SIGTSTP */
|
||||
SA_CONT, /* SIGCONT */
|
||||
0, /* SIGCHLD */
|
||||
SA_STOP, /* SIGTTIN */
|
||||
SA_STOP, /* SIGTTOU */
|
||||
0, /* SIGIO */
|
||||
SA_KILL, /* SIGXCPU */
|
||||
SA_KILL, /* SIGXFSZ */
|
||||
SA_KILL, /* SIGVTALRM */
|
||||
SA_KILL, /* SIGPROF */
|
||||
0, /* SIGWINCH */
|
||||
0, /* SIGINFO */
|
||||
SA_KILL, /* SIGUSR1 */
|
||||
SA_KILL /* SIGUSR2 */
|
||||
};
|
||||
|
||||
/* #define DEBUG_SIGNAL */
|
||||
#ifdef DEBUG_SIGNAL
|
||||
#define DBG_MSG stdout_debug
|
||||
@ -133,6 +172,8 @@ static void thr_sigframe_save(struct pthread *thread,
|
||||
* signal unmasked.
|
||||
*/
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
|
||||
static void *
|
||||
sig_daemon(void *arg /* Unused */)
|
||||
{
|
||||
@ -143,13 +184,20 @@ sig_daemon(void *arg /* Unused */)
|
||||
struct kse *curkse;
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
DBG_MSG("signal daemon started\n");
|
||||
DBG_MSG("signal daemon started(%p)\n", curthread);
|
||||
|
||||
curthread->name = strdup("signal thread");
|
||||
crit = _kse_critical_enter();
|
||||
curkse = _get_curkse();
|
||||
|
||||
/*
|
||||
* Daemon thread is a bound thread and we must be created with
|
||||
* all signals masked
|
||||
*/
|
||||
#if 0
|
||||
SIGFILLSET(set);
|
||||
__sys_sigprocmask(SIG_SETMASK, &set, NULL);
|
||||
#endif
|
||||
__sys_sigpending(&set);
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
@ -173,13 +221,14 @@ sig_daemon(void *arg /* Unused */)
|
||||
return (0);
|
||||
}
|
||||
|
||||
|
||||
/* Utility function to create signal daemon thread */
|
||||
int
|
||||
_thr_start_sig_daemon(void)
|
||||
{
|
||||
pthread_attr_t attr;
|
||||
sigset_t sigset, oldset;
|
||||
|
||||
|
||||
SIGFILLSET(sigset);
|
||||
pthread_sigmask(SIG_SETMASK, &sigset, &oldset);
|
||||
pthread_attr_init(&attr);
|
||||
@ -206,6 +255,13 @@ _thr_sig_dispatch(struct kse *curkse, int sig, siginfo_t *info)
|
||||
|
||||
/* Some signals need special handling: */
|
||||
handle_special_signals(curkse, sig);
|
||||
|
||||
/* Check if the signal requires a dump of thread information: */
|
||||
if (sig == SIGINFO) {
|
||||
/* Dump thread information to file: */
|
||||
_thread_dump_info();
|
||||
}
|
||||
|
||||
while ((thread = thr_sig_find(curkse, sig, info)) != NULL) {
|
||||
/*
|
||||
* Setup the target thread to receive the signal:
|
||||
@ -233,11 +289,27 @@ _thr_sig_dispatch(struct kse *curkse, int sig, siginfo_t *info)
|
||||
DBG_MSG("<<< _thr_sig_dispatch\n");
|
||||
}
|
||||
|
||||
#endif /* ! SYSTEM_SCOPE_ONLY */
|
||||
|
||||
static __inline int
|
||||
sigprop(int sig)
|
||||
{
|
||||
|
||||
if (sig > 0 && sig < NSIG)
|
||||
return (sigproptbl[_SIG_IDX(sig)]);
|
||||
return (0);
|
||||
}
|
||||
|
||||
void
|
||||
_thr_sig_handler(int sig, siginfo_t *info, ucontext_t *ucp)
|
||||
{
|
||||
__siginfohandler_t *sigfunc;
|
||||
struct pthread *curthread;
|
||||
struct kse *curkse;
|
||||
struct sigaction act;
|
||||
int sa_flags, err_save, intr_save, timeout_save;
|
||||
|
||||
DBG_MSG(">>> _thr_sig_handler(%d)\n", sig);
|
||||
|
||||
curkse = _get_curkse();
|
||||
if ((curkse == NULL) || ((curkse->k_flags & KF_STARTED) == 0)) {
|
||||
@ -253,12 +325,86 @@ _thr_sig_handler(int sig, siginfo_t *info, ucontext_t *ucp)
|
||||
(*(sigfunc))(sig,
|
||||
(siginfo_t*)(intptr_t)info->si_code, ucp);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
else {
|
||||
/* Nothing. */
|
||||
DBG_MSG("Got signal %d\n", sig);
|
||||
/* XXX Bound thread will fall into this... */
|
||||
|
||||
curthread = _get_curthread();
|
||||
if (curthread == NULL)
|
||||
PANIC("No current thread.\n");
|
||||
if (!(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
PANIC("Thread is not system scope.\n");
|
||||
if (curthread->flags & THR_FLAGS_EXITING)
|
||||
return;
|
||||
curkse = _get_curkse();
|
||||
/*
|
||||
* If thread is in critical region or if thread is on
|
||||
* the way of state transition, then latch signal into buffer.
|
||||
*/
|
||||
if (_kse_in_critical() || THR_IN_CRITICAL(curthread) ||
|
||||
(curthread->state != PS_RUNNING && curthread->curframe == NULL)) {
|
||||
DBG_MSG(">>> _thr_sig_handler(%d) in critical\n", sig);
|
||||
curthread->siginfo[sig-1] = *info;
|
||||
curthread->check_pending = 1;
|
||||
curkse->k_sigseqno++;
|
||||
SIGADDSET(curthread->sigpend, sig);
|
||||
/*
|
||||
* If the kse is on the way to idle itself, but
|
||||
* we have signal ready, we should prevent it
|
||||
* to sleep, kernel will latch the wakeup request,
|
||||
* so kse_release will return from kernel immediately.
|
||||
*/
|
||||
if (KSE_IS_IDLE(curkse))
|
||||
kse_wakeup(&curkse->k_mbx);
|
||||
return;
|
||||
}
|
||||
|
||||
/* It is now safe to invoke signal handler */
|
||||
err_save = curthread->error;
|
||||
timeout_save = curthread->timeout;
|
||||
intr_save = curthread->interrupted;
|
||||
/* Get a fresh copy of signal mask from kernel, for thread dump only */
|
||||
__sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask);
|
||||
_kse_critical_enter();
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_signal_lock);
|
||||
sigfunc = _thread_sigact[sig - 1].sa_sigaction;
|
||||
sa_flags = _thread_sigact[sig - 1].sa_flags & SA_SIGINFO;
|
||||
if (sa_flags & SA_RESETHAND) {
|
||||
act.sa_handler = SIG_DFL;
|
||||
act.sa_flags = SA_RESTART;
|
||||
SIGEMPTYSET(act.sa_mask);
|
||||
__sys_sigaction(sig, &act, NULL);
|
||||
__sys_sigaction(sig, NULL, &_thread_sigact[sig - 1]);
|
||||
}
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_signal_lock);
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
|
||||
/* Now invoke real handler */
|
||||
if (((__sighandler_t *)sigfunc != SIG_DFL) &&
|
||||
((__sighandler_t *)sigfunc != SIG_IGN) &&
|
||||
(sigfunc != (__siginfohandler_t *)_thr_sig_handler)) {
|
||||
if ((sa_flags & SA_SIGINFO) != 0 || info == NULL)
|
||||
(*(sigfunc))(sig, info, ucp);
|
||||
else
|
||||
(*(sigfunc))(sig, (siginfo_t*)(intptr_t)info->si_code,
|
||||
ucp);
|
||||
} else {
|
||||
if ((__sighandler_t *)sigfunc == SIG_DFL) {
|
||||
if (sigprop(sig) & SA_KILL)
|
||||
kse_thr_interrupt(NULL, KSE_INTR_SIGEXIT, sig);
|
||||
#ifdef NOTYET
|
||||
else if (sigprop(sig) & SA_STOP)
|
||||
kse_thr_interrupt(NULL, KSE_INTR_JOBSTOP, sig);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
curthread->error = err_save;
|
||||
curthread->timeout = timeout_save;
|
||||
curthread->interrupted = intr_save;
|
||||
_kse_critical_enter();
|
||||
curthread->sigmask = ucp->uc_sigmask;
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
DBG_MSG("<<< _thr_sig_handler(%d)\n", sig);
|
||||
}
|
||||
|
||||
/* Must be called with signal lock and schedule lock held in order */
|
||||
@ -292,19 +438,22 @@ thr_sig_invoke_handler(struct pthread *curthread, int sig, siginfo_t *info,
|
||||
if (!(sa_flags & (SA_NODEFER | SA_RESETHAND)))
|
||||
SIGADDSET(curthread->sigmask, sig);
|
||||
if ((sig != SIGILL) && (sa_flags & SA_RESETHAND)) {
|
||||
if (_thread_dfl_count[sig - 1] == 0) {
|
||||
act.sa_handler = SIG_DFL;
|
||||
act.sa_flags = SA_RESTART;
|
||||
SIGEMPTYSET(act.sa_mask);
|
||||
__sys_sigaction(sig, &act, NULL);
|
||||
__sys_sigaction(sig, NULL, &_thread_sigact[sig - 1]);
|
||||
}
|
||||
act.sa_handler = SIG_DFL;
|
||||
act.sa_flags = SA_RESTART;
|
||||
SIGEMPTYSET(act.sa_mask);
|
||||
__sys_sigaction(sig, &act, NULL);
|
||||
__sys_sigaction(sig, NULL, &_thread_sigact[sig - 1]);
|
||||
}
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_signal_lock);
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
/*
|
||||
* We are processing buffered signals, synchronize working
|
||||
* signal mask into kernel.
|
||||
*/
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
|
||||
ucp->uc_sigmask = sigmask;
|
||||
|
||||
if (((__sighandler_t *)sigfunc != SIG_DFL) &&
|
||||
((__sighandler_t *)sigfunc != SIG_IGN)) {
|
||||
if ((sa_flags & SA_SIGINFO) != 0 || info == NULL)
|
||||
@ -313,24 +462,29 @@ thr_sig_invoke_handler(struct pthread *curthread, int sig, siginfo_t *info,
|
||||
(*(sigfunc))(sig, (siginfo_t*)(intptr_t)info->si_code,
|
||||
ucp);
|
||||
} else {
|
||||
/* XXX
|
||||
* TODO: exit process if signal would kill it.
|
||||
*/
|
||||
#ifdef NOTYET
|
||||
if ((__sighandler_t *)sigfunc == SIG_DFL) {
|
||||
if (sigprop(sig) & SA_KILL)
|
||||
kse_sigexit(sig);
|
||||
kse_thr_interrupt(NULL, KSE_INTR_SIGEXIT, sig);
|
||||
#ifdef NOTYET
|
||||
else if (sigprop(sig) & SA_STOP)
|
||||
kse_thr_interrupt(NULL, KSE_INTR_JOBSTOP, sig);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
_kse_critical_enter();
|
||||
/* Don't trust after critical leave/enter */
|
||||
curkse = _get_curkse();
|
||||
KSE_SCHED_LOCK(curkse, curkse->k_kseg);
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_signal_lock);
|
||||
|
||||
/*
|
||||
* Restore the thread's signal mask.
|
||||
*/
|
||||
curthread->sigmask = ucp->uc_sigmask;
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
__sys_sigprocmask(SIG_SETMASK, &ucp->uc_sigmask, NULL);
|
||||
KSE_SCHED_LOCK(curkse, curkse->k_kseg);
|
||||
KSE_LOCK_ACQUIRE(curkse, &_thread_signal_lock);
|
||||
|
||||
DBG_MSG("Got signal %d, handler returned %p\n", sig, curthread);
|
||||
}
|
||||
|
||||
@ -365,13 +519,13 @@ _thr_getprocsig_unlocked(int sig, siginfo_t *siginfo)
|
||||
SIGADDSET(sigset, sig);
|
||||
ts.tv_sec = 0;
|
||||
ts.tv_nsec = 0;
|
||||
if (__sys_sigtimedwait(&sigset, siginfo, &ts) > 0) {
|
||||
SIGDELSET(_thr_proc_sigpending, sig);
|
||||
SIGDELSET(_thr_proc_sigpending, sig);
|
||||
if (__sys_sigtimedwait(&sigset, siginfo, &ts) > 0)
|
||||
return (sig);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
/*
|
||||
* Find a thread that can handle the signal. This must be called
|
||||
* with upcalls disabled.
|
||||
@ -381,15 +535,11 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
{
|
||||
struct pthread *pthread;
|
||||
struct pthread *suspended_thread, *signaled_thread;
|
||||
__siginfohandler_t *sigfunc;
|
||||
siginfo_t si;
|
||||
|
||||
DBG_MSG("Looking for thread to handle signal %d\n", sig);
|
||||
|
||||
/* Check if the signal requires a dump of thread information: */
|
||||
if (sig == SIGINFO) {
|
||||
/* Dump thread information to file: */
|
||||
_thread_dump_info();
|
||||
}
|
||||
/*
|
||||
* Enter a loop to look for threads that have the signal
|
||||
* unmasked. POSIX specifies that a thread in a sigwait
|
||||
@ -407,12 +557,9 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
TAILQ_FOREACH(pthread, &_thread_list, tle) {
|
||||
if (pthread == _thr_sig_daemon)
|
||||
continue;
|
||||
#ifdef NOTYET
|
||||
/* Signal delivering to bound thread is done by kernel */
|
||||
if (pthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
continue;
|
||||
#endif
|
||||
|
||||
/* Take the scheduling lock. */
|
||||
KSE_SCHED_LOCK(curkse, pthread->kseg);
|
||||
if ((pthread->state == PS_DEAD) ||
|
||||
@ -451,8 +598,16 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_list_lock);
|
||||
return (NULL);
|
||||
} else if (!SIGISMEMBER(pthread->sigmask, sig) ||
|
||||
(!SIGISMEMBER(pthread->oldsigmask, sig) &&
|
||||
pthread->state == PS_SIGWAIT)) {
|
||||
(!SIGISMEMBER(pthread->oldsigmask, sig) &&
|
||||
pthread->state == PS_SIGWAIT)) {
|
||||
sigfunc = _thread_sigact[sig - 1].sa_sigaction;
|
||||
if ((__sighandler_t *)sigfunc == SIG_DFL) {
|
||||
if (sigprop(sig) & SA_KILL) {
|
||||
kse_thr_interrupt(NULL,
|
||||
KSE_INTR_SIGEXIT, sig);
|
||||
/* Never reach */
|
||||
}
|
||||
}
|
||||
if (pthread->state == PS_SIGSUSPEND) {
|
||||
if (suspended_thread == NULL) {
|
||||
suspended_thread = pthread;
|
||||
@ -478,6 +633,7 @@ thr_sig_find(struct kse *curkse, int sig, siginfo_t *info)
|
||||
}
|
||||
return (pthread);
|
||||
}
|
||||
#endif /* ! SYSTEM_SCOPE_ONLY */
|
||||
|
||||
static void
|
||||
build_siginfo(siginfo_t *info, int signo)
|
||||
@ -501,8 +657,9 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
int i;
|
||||
kse_critical_t crit;
|
||||
struct kse *curkse;
|
||||
sigset_t sigmask;
|
||||
|
||||
DBG_MSG(">>> thr_sig_rundown %p\n", curthread);
|
||||
DBG_MSG(">>> thr_sig_rundown (%p)\n", curthread);
|
||||
/* Check the threads previous state: */
|
||||
if ((psf != NULL) && (psf->psf_valid != 0)) {
|
||||
/*
|
||||
@ -544,6 +701,15 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
curthread->active_priority &= ~THR_SIGNAL_PRIORITY;
|
||||
|
||||
while (1) {
|
||||
/*
|
||||
* For bound thread, we mask all signals and get a fresh
|
||||
* copy of signal mask from kernel
|
||||
*/
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
SIGFILLSET(sigmask);
|
||||
__sys_sigprocmask(SIG_SETMASK, &sigmask,
|
||||
&curthread->sigmask);
|
||||
}
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(curthread->sigmask, i))
|
||||
continue;
|
||||
@ -552,7 +718,8 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
siginfo = curthread->siginfo[i-1];
|
||||
break;
|
||||
}
|
||||
if (SIGISMEMBER(_thr_proc_sigpending, i)) {
|
||||
if (!(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
&& SIGISMEMBER(_thr_proc_sigpending, i)) {
|
||||
if (_thr_getprocsig_unlocked(i, &siginfo))
|
||||
break;
|
||||
}
|
||||
@ -568,12 +735,14 @@ _thr_sig_rundown(struct pthread *curthread, ucontext_t *ucp,
|
||||
curkse = _get_curkse();
|
||||
KSE_LOCK_RELEASE(curkse, &_thread_signal_lock);
|
||||
KSE_SCHED_UNLOCK(curkse, curkse->k_kseg);
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
|
||||
_kse_critical_leave(&curthread->tmbx);
|
||||
|
||||
curthread->interrupted = interrupted;
|
||||
curthread->timeout = timeout;
|
||||
|
||||
DBG_MSG("<<< thr_sig_rundown %p\n", curthread);
|
||||
DBG_MSG("<<< thr_sig_rundown (%p)\n", curthread);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -603,6 +772,7 @@ _thr_sig_check_pending(struct pthread *curthread)
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef SYSTEM_SCOPE_ONLY
|
||||
/*
|
||||
* This must be called with upcalls disabled.
|
||||
*/
|
||||
@ -631,6 +801,7 @@ handle_special_signals(struct kse *curkse, int sig)
|
||||
break;
|
||||
}
|
||||
}
|
||||
#endif /* ! SYSTEM_SCOPE_ONLY */
|
||||
|
||||
/*
|
||||
* Perform thread specific actions in response to a signal.
|
||||
@ -650,7 +821,7 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
struct kse *curkse;
|
||||
siginfo_t siginfo;
|
||||
|
||||
DBG_MSG(">>> _thr_sig_add\n");
|
||||
DBG_MSG(">>> _thr_sig_add %p (%d)\n", pthread, sig);
|
||||
|
||||
curkse = _get_curkse();
|
||||
restart = _thread_sigact[sig - 1].sa_flags & SA_RESTART;
|
||||
@ -660,13 +831,11 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
pthread->state == PS_STATE_MAX)
|
||||
return; /* return false */
|
||||
|
||||
#ifdef NOTYET
|
||||
if ((pthread->attrs.flags & PTHREAD_SCOPE_SYSTEM) != 0) {
|
||||
if (!fromproc)
|
||||
kse_thr_interrupt(&pthread->tmbx, 0, sig);
|
||||
if ((pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) &&
|
||||
(curthread != pthread)) {
|
||||
PANIC("Please use _thr_send_sig for bound thread");
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (pthread->curframe == NULL ||
|
||||
(pthread->state != PS_SIGWAIT &&
|
||||
@ -687,9 +856,11 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
}
|
||||
if (!SIGISMEMBER(pthread->sigmask, sig)) {
|
||||
pthread->check_pending = 1;
|
||||
if (pthread->blocked != 0 && !THR_IN_CRITICAL(pthread))
|
||||
if (!(pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) &&
|
||||
(pthread->blocked != 0) &&
|
||||
!THR_IN_CRITICAL(pthread))
|
||||
kse_thr_interrupt(&pthread->tmbx,
|
||||
restart ? -2 : -1);
|
||||
restart ? KSE_INTR_RESTART : KSE_INTR_INTERRUPT, 0);
|
||||
}
|
||||
}
|
||||
else {
|
||||
@ -801,64 +972,6 @@ _thr_sig_add(struct pthread *pthread, int sig, siginfo_t *info)
|
||||
pthread->check_pending = 1;
|
||||
}
|
||||
}
|
||||
|
||||
DBG_MSG("<<< _thr_sig_add\n");
|
||||
}
|
||||
|
||||
static void
|
||||
thr_sig_check_state(struct pthread *pthread, int sig)
|
||||
{
|
||||
/*
|
||||
* Process according to thread state:
|
||||
*/
|
||||
switch (pthread->state) {
|
||||
/*
|
||||
* States which do not change when a signal is trapped:
|
||||
*/
|
||||
case PS_RUNNING:
|
||||
case PS_LOCKWAIT:
|
||||
case PS_MUTEX_WAIT:
|
||||
case PS_COND_WAIT:
|
||||
case PS_JOIN:
|
||||
case PS_SUSPENDED:
|
||||
case PS_DEAD:
|
||||
case PS_DEADLOCK:
|
||||
case PS_STATE_MAX:
|
||||
break;
|
||||
|
||||
case PS_SIGWAIT:
|
||||
build_siginfo(&pthread->siginfo[sig-1], sig);
|
||||
/* Wake up the thread if the signal is blocked. */
|
||||
if (!SIGISMEMBER(pthread->sigmask, sig)) {
|
||||
/* Return the signal number: */
|
||||
*(pthread->data.sigwaitinfo) = pthread->siginfo[sig-1];
|
||||
pthread->sigmask = pthread->oldsigmask;
|
||||
/* Change the state of the thread to run: */
|
||||
_thr_setrunnable_unlocked(pthread);
|
||||
} else {
|
||||
/* Increment the pending signal count. */
|
||||
SIGADDSET(pthread->sigpend, sig);
|
||||
if (!SIGISMEMBER(pthread->oldsigmask, sig)) {
|
||||
pthread->check_pending = 1;
|
||||
pthread->interrupted = 1;
|
||||
pthread->sigmask = pthread->oldsigmask;
|
||||
_thr_setrunnable_unlocked(pthread);
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case PS_SIGSUSPEND:
|
||||
case PS_SLEEP_WAIT:
|
||||
/*
|
||||
* Remove the thread from the wait queue and make it
|
||||
* runnable:
|
||||
*/
|
||||
_thr_setrunnable_unlocked(pthread);
|
||||
|
||||
/* Flag the operation as interrupted: */
|
||||
pthread->interrupted = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
@ -869,41 +982,14 @@ _thr_sig_send(struct pthread *pthread, int sig)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
#ifdef NOTYET
|
||||
if ((pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) == 0) {
|
||||
kse_thr_interrupt(&pthread->tmbx, sig);
|
||||
if (pthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
kse_thr_interrupt(&pthread->tmbx, KSE_INTR_SENDSIG, sig);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Lock the scheduling queue of the target thread. */
|
||||
THR_SCHED_LOCK(curthread, pthread);
|
||||
|
||||
/* Check for signals whose actions are SIG_DFL: */
|
||||
if (_thread_sigact[sig - 1].sa_handler == SIG_DFL) {
|
||||
/*
|
||||
* Check to see if a temporary signal handler is
|
||||
* installed for sigwaiters:
|
||||
*/
|
||||
if (_thread_dfl_count[sig - 1] == 0) {
|
||||
/*
|
||||
* Deliver the signal to the process if a handler
|
||||
* is not installed:
|
||||
*/
|
||||
THR_SCHED_UNLOCK(curthread, pthread);
|
||||
kill(getpid(), sig);
|
||||
THR_SCHED_LOCK(curthread, pthread);
|
||||
}
|
||||
/*
|
||||
* Assuming we're still running after the above kill(),
|
||||
* make any necessary state changes to the thread:
|
||||
*/
|
||||
thr_sig_check_state(pthread, sig);
|
||||
THR_SCHED_UNLOCK(curthread, pthread);
|
||||
}
|
||||
/*
|
||||
* Check that the signal is not being ignored:
|
||||
*/
|
||||
else if (_thread_sigact[sig - 1].sa_handler != SIG_IGN) {
|
||||
if (_thread_sigact[sig - 1].sa_handler != SIG_IGN) {
|
||||
_thr_sig_add(pthread, sig, NULL);
|
||||
THR_SCHED_UNLOCK(curthread, pthread);
|
||||
/* XXX
|
||||
@ -965,6 +1051,7 @@ _thr_signal_init(void)
|
||||
{
|
||||
sigset_t sigset;
|
||||
struct sigaction act;
|
||||
__siginfohandler_t *sigfunc;
|
||||
int i;
|
||||
|
||||
SIGFILLSET(sigset);
|
||||
@ -984,6 +1071,15 @@ _thr_signal_init(void)
|
||||
*/
|
||||
PANIC("Cannot read signal handler info");
|
||||
}
|
||||
/* Intall wrapper if handler was set */
|
||||
sigfunc = _thread_sigact[i - 1].sa_sigaction;
|
||||
if (((__sighandler_t *)sigfunc) != SIG_DFL &&
|
||||
((__sighandler_t *)sigfunc) != SIG_IGN) {
|
||||
act = _thread_sigact[i - 1];
|
||||
act.sa_flags |= SA_SIGINFO;
|
||||
act.sa_sigaction = (__siginfohandler_t *)_thr_sig_handler;
|
||||
__sys_sigaction(i, &act, NULL);
|
||||
}
|
||||
}
|
||||
/*
|
||||
* Install the signal handler for SIGINFO. It isn't
|
||||
@ -1000,6 +1096,9 @@ _thr_signal_init(void)
|
||||
*/
|
||||
PANIC("Cannot initialize signal handler");
|
||||
}
|
||||
#ifdef SYSTEM_SCOPE_ONLY
|
||||
__sys_sigprocmask(SIG_SETMASK, &_thr_initial->sigmask, NULL);
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
|
@ -52,6 +52,15 @@ _pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
|
||||
if (! _kse_isthreaded())
|
||||
_kse_setthreaded(1);
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
ret = __sys_sigprocmask(how, set, oset);
|
||||
if (ret != 0)
|
||||
ret = errno;
|
||||
/* Get a copy for thread dump */
|
||||
__sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
if (set)
|
||||
newset = *set;
|
||||
|
||||
|
@ -55,8 +55,9 @@ _sigpending(sigset_t *set)
|
||||
ret = EINVAL;
|
||||
}
|
||||
else {
|
||||
if (!_kse_isthreaded())
|
||||
return __sys_sigpending(set);
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
return (__sys_sigpending(set));
|
||||
|
||||
crit = _kse_critical_enter();
|
||||
KSE_SCHED_LOCK(curthread->kse, curthread->kseg);
|
||||
|
@ -35,6 +35,7 @@
|
||||
#include <errno.h>
|
||||
#include <pthread.h>
|
||||
#include <string.h>
|
||||
#include <sys/signalvar.h>
|
||||
#include "thr_private.h"
|
||||
|
||||
__weak_reference(__sigsuspend, sigsuspend);
|
||||
@ -46,12 +47,14 @@ _sigsuspend(const sigset_t *set)
|
||||
sigset_t oldmask, newmask;
|
||||
int ret = -1;
|
||||
|
||||
if (!_kse_isthreaded())
|
||||
return __sys_sigsuspend(set);
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
|
||||
return (__sys_sigsuspend(set));
|
||||
|
||||
/* Check if a new signal set was provided by the caller: */
|
||||
if (set != NULL) {
|
||||
newmask = *set;
|
||||
SIG_CANTMASK(newmask);
|
||||
|
||||
THR_LOCK_SWITCH(curthread);
|
||||
|
||||
|
@ -50,26 +50,18 @@ lib_sigtimedwait(const sigset_t *set, siginfo_t *info,
|
||||
struct pthread *curthread = _get_curthread();
|
||||
int ret = 0;
|
||||
int i;
|
||||
sigset_t tempset, waitset;
|
||||
struct sigaction act;
|
||||
sigset_t waitset;
|
||||
kse_critical_t crit;
|
||||
siginfo_t siginfo;
|
||||
|
||||
if (!_kse_isthreaded()) {
|
||||
if (!_kse_isthreaded() ||
|
||||
(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)) {
|
||||
if (info == NULL)
|
||||
info = &siginfo;
|
||||
return __sys_sigtimedwait((sigset_t *)set, info,
|
||||
(struct timespec *)timeout);
|
||||
return (__sys_sigtimedwait((sigset_t *)set, info,
|
||||
(struct timespec *)timeout));
|
||||
}
|
||||
|
||||
/*
|
||||
* Specify the thread kernel signal handler.
|
||||
*/
|
||||
act.sa_handler = (void (*) ()) _thr_sig_handler;
|
||||
act.sa_flags = SA_RESTART | SA_SIGINFO;
|
||||
/* Ensure the signal handler cannot be interrupted by other signals: */
|
||||
SIGFILLSET(act.sa_mask);
|
||||
|
||||
/*
|
||||
* Initialize the set of signals that will be waited on:
|
||||
*/
|
||||
@ -79,103 +71,60 @@ lib_sigtimedwait(const sigset_t *set, siginfo_t *info,
|
||||
SIGDELSET(waitset, SIGKILL);
|
||||
SIGDELSET(waitset, SIGSTOP);
|
||||
|
||||
crit = _kse_critical_enter();
|
||||
KSE_LOCK_ACQUIRE(curthread->kse, &_thread_signal_lock);
|
||||
|
||||
/*
|
||||
* Enter a loop to find the signals that are SIG_DFL. For
|
||||
* these signals we must install a dummy signal handler in
|
||||
* order for the kernel to pass them in to us. POSIX says
|
||||
* that the _application_ must explicitly install a dummy
|
||||
* handler for signals that are SIG_IGN in order to sigwait
|
||||
* on them. Note that SIG_IGN signals are left in the
|
||||
* mask because a subsequent sigaction could enable an
|
||||
* POSIX says that the _application_ must explicitly install
|
||||
* a dummy handler for signals that are SIG_IGN in order
|
||||
* to sigwait on them. Note that SIG_IGN signals are left in
|
||||
* the mask because a subsequent sigaction could enable an
|
||||
* ignored signal.
|
||||
*/
|
||||
SIGEMPTYSET(tempset);
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(waitset, i) &&
|
||||
(_thread_sigact[i - 1].sa_handler == SIG_DFL)) {
|
||||
_thread_dfl_count[i - 1]++;
|
||||
SIGADDSET(tempset, i);
|
||||
if (_thread_dfl_count[i - 1] == 1) {
|
||||
if (__sys_sigaction(i, &act, NULL) != 0)
|
||||
/* ret = -1 */;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (ret == 0) {
|
||||
/* Done accessing _thread_dfl_count for now. */
|
||||
KSE_LOCK_RELEASE(curthread->kse, &_thread_signal_lock);
|
||||
KSE_SCHED_LOCK(curthread->kse, curthread->kseg);
|
||||
for (i = 1; i <= _SIG_MAXSIG; ++i) {
|
||||
if (SIGISMEMBER(waitset, i) &&
|
||||
SIGISMEMBER(curthread->sigpend, i)) {
|
||||
SIGDELSET(curthread->sigpend, i);
|
||||
siginfo = curthread->siginfo[i - 1];
|
||||
KSE_SCHED_UNLOCK(curthread->kse,
|
||||
curthread->kseg);
|
||||
KSE_LOCK_ACQUIRE(curthread->kse,
|
||||
&_thread_signal_lock);
|
||||
ret = i;
|
||||
goto OUT;
|
||||
}
|
||||
crit = _kse_critical_enter();
|
||||
KSE_SCHED_LOCK(curthread->kse, curthread->kseg);
|
||||
for (i = 1; i <= _SIG_MAXSIG; ++i) {
|
||||
if (SIGISMEMBER(waitset, i) &&
|
||||
SIGISMEMBER(curthread->sigpend, i)) {
|
||||
SIGDELSET(curthread->sigpend, i);
|
||||
siginfo = curthread->siginfo[i - 1];
|
||||
KSE_SCHED_UNLOCK(curthread->kse,
|
||||
curthread->kseg);
|
||||
_kse_critical_leave(crit);
|
||||
ret = i;
|
||||
goto OUT;
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
_thr_set_timeout(timeout);
|
||||
/* Wait for a signal: */
|
||||
curthread->oldsigmask = curthread->sigmask;
|
||||
siginfo.si_signo = 0;
|
||||
curthread->data.sigwaitinfo = &siginfo;
|
||||
SIGFILLSET(curthread->sigmask);
|
||||
SIGSETNAND(curthread->sigmask, waitset);
|
||||
THR_SET_STATE(curthread, PS_SIGWAIT);
|
||||
_thr_sched_switch_unlocked(curthread);
|
||||
/*
|
||||
* Return the signal number to the caller:
|
||||
*/
|
||||
if (siginfo.si_signo > 0) {
|
||||
ret = siginfo.si_signo;
|
||||
} else {
|
||||
if (curthread->interrupted)
|
||||
errno = EINTR;
|
||||
else if (curthread->timeout)
|
||||
errno = EAGAIN;
|
||||
ret = -1;
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
/*
|
||||
* Probably unnecessary, but since it's in a union struct
|
||||
* we don't know how it could be used in the future.
|
||||
*/
|
||||
crit = _kse_critical_enter();
|
||||
curthread->data.sigwaitinfo = NULL;
|
||||
/*
|
||||
* Relock the array of SIG_DFL wait counts.
|
||||
*/
|
||||
KSE_LOCK_ACQUIRE(curthread->kse, &_thread_signal_lock);
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
_thr_set_timeout(timeout);
|
||||
/* Wait for a signal: */
|
||||
curthread->oldsigmask = curthread->sigmask;
|
||||
siginfo.si_signo = 0;
|
||||
curthread->data.sigwaitinfo = &siginfo;
|
||||
SIGFILLSET(curthread->sigmask);
|
||||
SIGSETNAND(curthread->sigmask, waitset);
|
||||
THR_SET_STATE(curthread, PS_SIGWAIT);
|
||||
_thr_sched_switch_unlocked(curthread);
|
||||
/*
|
||||
* Return the signal number to the caller:
|
||||
*/
|
||||
if (siginfo.si_signo > 0) {
|
||||
ret = siginfo.si_signo;
|
||||
} else {
|
||||
if (curthread->interrupted)
|
||||
errno = EINTR;
|
||||
else if (curthread->timeout)
|
||||
errno = EAGAIN;
|
||||
ret = -1;
|
||||
}
|
||||
curthread->timeout = 0;
|
||||
curthread->interrupted = 0;
|
||||
/*
|
||||
* Probably unnecessary, but since it's in a union struct
|
||||
* we don't know how it could be used in the future.
|
||||
*/
|
||||
curthread->data.sigwaitinfo = NULL;
|
||||
|
||||
OUT:
|
||||
/* Restore the sigactions: */
|
||||
act.sa_handler = SIG_DFL;
|
||||
for (i = 1; i <= _SIG_MAXSIG; i++) {
|
||||
if (SIGISMEMBER(tempset, i)) {
|
||||
_thread_dfl_count[i - 1]--;
|
||||
if ((_thread_sigact[i - 1].sa_handler == SIG_DFL) &&
|
||||
(_thread_dfl_count[i - 1] == 0)) {
|
||||
if (__sys_sigaction(i, &act, NULL) != 0)
|
||||
/* ret = -1 */ ;
|
||||
}
|
||||
}
|
||||
}
|
||||
/* Done accessing _thread_dfl_count. */
|
||||
KSE_LOCK_RELEASE(curthread->kse, &_thread_signal_lock);
|
||||
_kse_critical_leave(crit);
|
||||
|
||||
if (ret > 0 && info != NULL)
|
||||
*info = siginfo;
|
||||
|
||||
|
@ -42,6 +42,9 @@ _sched_yield(void)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
|
||||
return (__sys_sched_yield());
|
||||
|
||||
/* Reset the accumulated time slice value for the current thread: */
|
||||
curthread->slice_usec = -1;
|
||||
|
||||
@ -57,6 +60,11 @@ _pthread_yield(void)
|
||||
{
|
||||
struct pthread *curthread = _get_curthread();
|
||||
|
||||
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
|
||||
__sys_sched_yield();
|
||||
return;
|
||||
}
|
||||
|
||||
/* Reset the accumulated time slice value for the current thread: */
|
||||
curthread->slice_usec = -1;
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user