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Diffstat (limited to 'libpthread/signal/signal-dispatch.c')
| -rw-r--r-- | libpthread/signal/signal-dispatch.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/libpthread/signal/signal-dispatch.c b/libpthread/signal/signal-dispatch.c deleted file mode 100644 index 40440b70..00000000 --- a/libpthread/signal/signal-dispatch.c +++ /dev/null @@ -1,117 +0,0 @@ -/* signal-dispatch.c - Signal dispatcher. - Copyright (C) 2008 Free Software Foundation, Inc. - Written by Neal H. Walfield <neal@gnu.org>. - - This file is part of the GNU Hurd. - - The GNU Hurd is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public License - as published by the Free Software Foundation; either version 3 of - the License, or (at your option) any later version. - - The GNU Hurd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this program. If not, see - <http://www.gnu.org/licenses/>. */ - -#include "sig-internal.h" - -/* This is the signal handler entry point. A thread is forced into - this state when it receives a signal. We need to save the thread's - state and then invoke the high-level signal dispatcher. SS->LOCK - is locked by the caller. */ -void -signal_dispatch (struct signal_state *ss, siginfo_t *si) -{ - SIGNAL_DISPATCH_ENTRY; - - int signo = si->si_signo; - - assert (signo > 0 && signo < NSIG); - assert (pthread_mutex_trylock (&ss->lock) == EBUSY); - - do - { - if ((sigmask (signo) & STOPSIGS)) - /* Stop signals clear a pending SIGCONT even if they - are handled or ignored (but not if preempted). */ - { - sigdelset (&ss->pending, SIGCONT); - sigdelset (&process_pending, SIGCONT); - } - else if ((signo == SIGCONT)) - /* Even if handled or ignored (but not preempted), SIGCONT - clears stop signals and resumes the process. */ - { - ss->pending &= ~STOPSIGS; - process_pending &= ~STOPSIGS; - } - - void (*handler)(int, siginfo_t *, void *) - = ss->actions[signo - 1].sa_sigaction; - - /* Reset to SIG_DFL if requested. SIGILL and SIGTRAP cannot - be automatically reset when delivered; the system silently - enforces this restriction (sigaction). */ - if (ss->actions[signo - 1].sa_flags & SA_RESETHAND - && signo != SIGILL && signo != SIGTRAP) - ss->actions[signo - 1].sa_handler = SIG_DFL; - - sigset_t orig_blocked = ss->blocked; - /* Block requested signals while running the handler. */ - ss->blocked |= ss->actions[signo - 1].sa_mask; - - /* Block SIGNO unless we're asked not to. */ - if (! (ss->actions[signo - 1].sa_flags & (SA_RESETHAND | SA_NODEFER))) - sigaddset (&ss->blocked, signo); - - sigdelset (&ss->pending, signo); - pthread_mutex_unlock (&ss->lock); - - pthread_mutex_lock (&sig_lock); - sigdelset (&process_pending, signo); - pthread_mutex_unlock (&sig_lock); - - if (handler == (void *) SIG_DFL) - { - enum sig_action action = default_action (signo); - - if (action == sig_terminate || action == sig_core) - _exit (128 + signo); - - if (action == sig_stop) - /* XXX: Implement me. */ - panic ("Stopping process unimplemented."); - - if (action == sig_cont) - /* XXX: Implement me. */; - panic ("Continuing process unimplemented."); - } - else if (handler == (void *) SIG_IGN) - ; - else - handler (signo, si, NULL); - - pthread_mutex_lock (&ss->lock); - - /* "When a thread's signal mask is changed in a signal-catching - function that is installed by sigaction(), the restoration of - the signal mask on return from the signal-catching function - overrides that change (see sigaction())" (sigprocmask). */ - ss->blocked = orig_blocked; - - sigset_t pending = ~ss->blocked & ss->pending; - if (! pending) - pending = ~ss->blocked & process_pending; - signo = l4_lsb64 (pending); - } - while (signo); - - pthread_mutex_unlock (&ss->lock); - - SIGNAL_DISPATCH_EXIT; -} |