2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include "namespace.h"
40 #include <sys/signalvar.h>
41 #include "un-namespace.h"
43 #include "libc_private.h"
44 #include "thr_private.h"
48 __weak_reference(_fork, fork);
53 sigset_t sigset, oldset;
54 struct pthread *curthread;
55 struct pthread_atfork *af;
59 curthread = _get_curthread();
61 if (!_kse_isthreaded()) {
63 __sys_sigprocmask(SIG_SETMASK, &sigset, &oldset);
67 __sys_sigprocmask(SIG_SETMASK, &curthread->sigmask,
70 __sys_sigprocmask(SIG_SETMASK, &oldset, NULL);
75 * Masks all signals until we reach a safe point in
76 * _kse_single_thread, and the signal masks will be
77 * restored in that function, for M:N thread, all
78 * signals were already masked in kernel atomically,
79 * we only need to do this for bound thread.
81 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
83 __sys_sigprocmask(SIG_SETMASK, &sigset, &oldset);
86 _pthread_mutex_lock(&_thr_atfork_mutex);
88 /* Run down atfork prepare handlers. */
89 TAILQ_FOREACH_REVERSE(af, &_thr_atfork_list, atfork_head, qe) {
90 if (af->prepare != NULL)
94 /* Fork a new process: */
95 if (_kse_isthreaded() != 0) {
98 if ((ret = __sys_fork()) == 0) {
102 /* Kernel signal mask is restored in _kse_single_thread */
103 _kse_single_thread(curthread);
105 /* Run down atfork child handlers. */
106 TAILQ_FOREACH(af, &_thr_atfork_list, qe) {
107 if (af->child != NULL)
110 _thr_mutex_reinit(&_thr_atfork_mutex);
112 if (_kse_isthreaded() != 0) {
116 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
117 __sys_sigprocmask(SIG_SETMASK, &oldset, NULL);
119 /* Run down atfork parent handlers. */
120 TAILQ_FOREACH(af, &_thr_atfork_list, qe) {
121 if (af->parent != NULL)
124 _pthread_mutex_unlock(&_thr_atfork_mutex);
128 /* Return the process ID: */