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"
37 #include "un-namespace.h"
39 #include "libc_private.h"
40 #include "thr_private.h"
42 void _pthread_exit(void *status);
44 __weak_reference(_pthread_exit, pthread_exit);
47 _thread_exit(const char *fname, int lineno, const char *msg)
50 /* Write an error message to the standard error file descriptor: */
52 "Fatal error '%s' at line %d in file %s (errno = %d)\n",
53 msg, lineno, fname, errno);
59 * Only called when a thread is cancelled. It may be more useful
60 * to call it from pthread_exit() if other ways of asynchronous or
61 * abnormal thread termination can be found.
64 _thr_exit_cleanup(void)
69 _pthread_exit(void *status)
71 struct pthread *curthread = _get_curthread();
73 /* Check if this thread is already in the process of exiting: */
74 if (curthread->cancelling) {
76 snprintf(msg, sizeof(msg), "Thread %p has called "
77 "pthread_exit() from a destructor. POSIX 1003.1 "
78 "1996 s16.2.5.2 does not allow this!", curthread);
82 /* Flag this thread as exiting. */
83 curthread->cancelling = 1;
84 curthread->cancel_enable = 0;
85 curthread->cancel_async = 0;
89 /* Save the return value: */
90 curthread->ret = status;
91 while (curthread->cleanup != NULL) {
92 _pthread_cleanup_pop(1);
95 /* Check if there is thread specific data: */
96 if (curthread->specific != NULL) {
97 /* Run the thread-specific data destructors: */
98 _thread_cleanupspecific();
101 if (!_thr_isthreaded())
104 THREAD_LIST_LOCK(curthread);
105 _thread_active_threads--;
106 if (_thread_active_threads == 0) {
107 THREAD_LIST_UNLOCK(curthread);
111 THREAD_LIST_UNLOCK(curthread);
113 /* Tell malloc that the thread is exiting. */
114 _malloc_thread_cleanup();
116 THREAD_LIST_LOCK(curthread);
118 curthread->state = PS_DEAD;
119 if (curthread->flags & THR_FLAGS_NEED_SUSPEND) {
121 _thr_umtx_wake(&curthread->cycle, INT_MAX, 0);
123 THR_UNLOCK(curthread);
125 * Thread was created with initial refcount 1, we drop the
126 * reference count to allow it to be garbage collected.
128 curthread->refcount--;
129 if (curthread->tlflags & TLFLAGS_DETACHED)
130 THR_GCLIST_ADD(curthread);
131 THREAD_LIST_UNLOCK(curthread);
132 if (!curthread->force_exit && SHOULD_REPORT_EVENT(curthread, TD_DEATH))
133 _thr_report_death(curthread);
136 * Kernel will do wakeup at the address, so joiner thread
137 * will be resumed if it is sleeping at the address.
139 thr_exit(&curthread->tid);
140 PANIC("thr_exit() returned");