1368ee7bbe
sigprocmask no longer needs to be wrapped. o raise(3) is applied to the calling thread in a threaded program. o In the sigaction wrapper reference the correct structure. o Don't treat SIGTHR especially anymore (infact it won't exist in a little while).
160 lines
4.2 KiB
C
160 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2003 Jeffrey Roberson <jeff@freebsd.org>
|
|
* Copyright (c) 2003 Jonathan Mini <mini@freebsd.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice unmodified, this list of conditions, and the following
|
|
* disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/signalvar.h>
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <setjmp.h>
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "thr_private.h"
|
|
|
|
/* #define DEBUG_SIGNAL */
|
|
#ifdef DEBUG_SIGNAL
|
|
#define DBG_MSG stdout_debug
|
|
#else
|
|
#define DBG_MSG(x...)
|
|
#endif
|
|
|
|
__weak_reference(_pthread_sigmask, pthread_sigmask);
|
|
|
|
int
|
|
_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* This always sets the mask on the current thread.
|
|
*/
|
|
error = sigprocmask(how, set, oset);
|
|
|
|
/*
|
|
* pthread_sigmask returns errno or success while sigprocmask returns
|
|
* -1 and sets errno.
|
|
*/
|
|
if (error == -1)
|
|
error = errno;
|
|
|
|
return (error);
|
|
}
|
|
|
|
|
|
__weak_reference(_pthread_kill, pthread_kill);
|
|
|
|
int
|
|
_pthread_kill(pthread_t pthread, int sig)
|
|
{
|
|
|
|
if (_thread_initial == NULL)
|
|
_thread_init();
|
|
return (thr_kill(pthread->thr_id, sig));
|
|
}
|
|
|
|
/*
|
|
* User thread signal handler wrapper.
|
|
*/
|
|
void
|
|
_thread_sig_wrapper(int sig, siginfo_t *info, void *context)
|
|
{
|
|
struct pthread_state_data psd;
|
|
struct sigaction *actp;
|
|
__siginfohandler_t *handler;
|
|
struct umtx *up;
|
|
spinlock_t *sp;
|
|
|
|
/*
|
|
* Do a little cleanup handling for those threads in
|
|
* queues before calling the signal handler. Signals
|
|
* for these threads are temporarily blocked until
|
|
* after cleanup handling.
|
|
*/
|
|
switch (curthread->state) {
|
|
case PS_BARRIER_WAIT:
|
|
/*
|
|
* XXX - The thread has reached the barrier. We can't
|
|
* "back it away" from the barrier.
|
|
*/
|
|
_thread_critical_enter(curthread);
|
|
break;
|
|
case PS_COND_WAIT:
|
|
/*
|
|
* Cache the address, since it will not be available
|
|
* after it has been backed out.
|
|
*/
|
|
up = &curthread->data.cond->c_lock;
|
|
|
|
UMTX_LOCK(up);
|
|
_thread_critical_enter(curthread);
|
|
_cond_wait_backout(curthread);
|
|
UMTX_UNLOCK(up);
|
|
break;
|
|
case PS_MUTEX_WAIT:
|
|
/*
|
|
* Cache the address, since it will not be available
|
|
* after it has been backed out.
|
|
*/
|
|
sp = &curthread->data.mutex->lock;
|
|
|
|
_SPINLOCK(sp);
|
|
_thread_critical_enter(curthread);
|
|
_mutex_lock_backout(curthread);
|
|
_SPINUNLOCK(sp);
|
|
break;
|
|
default:
|
|
/*
|
|
* We need to lock the thread to read it's flags.
|
|
*/
|
|
_thread_critical_enter(curthread);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* We save the flags now so that any modifications done as part
|
|
* of the backout are reflected when the flags are restored.
|
|
*/
|
|
psd.psd_flags = curthread->flags;
|
|
|
|
PTHREAD_SET_STATE(curthread, PS_RUNNING);
|
|
_thread_critical_exit(curthread);
|
|
actp = proc_sigact_sigaction(sig);
|
|
handler = (__siginfohandler_t *)actp->sa_handler;
|
|
handler(sig, info, (ucontext_t *)context);
|
|
|
|
/* Restore the thread's flags, and make it runnable */
|
|
_thread_critical_enter(curthread);
|
|
curthread->flags = psd.psd_flags;
|
|
PTHREAD_SET_STATE(curthread, PS_RUNNING);
|
|
_thread_critical_exit(curthread);
|
|
}
|