1 files changed, 241 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_exit.c b/lib/libpthread/thread/thr_exit.c
new file mode 100644
index 0000000..c9513cf
--- /dev/null
+++ b/lib/libpthread/thread/thr_exit.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
+ * 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, 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by John Birrell.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include "pthread_private.h"
+
+#define FLAGS_IN_SCHEDQ	\
+	(PTHREAD_FLAGS_IN_PRIOQ|PTHREAD_FLAGS_IN_WAITQ|PTHREAD_FLAGS_IN_WORKQ)
+
+__weak_reference(_pthread_exit, pthread_exit);
+
+void _exit(int status)
+{
+	int		flags;
+	int             i;
+	struct itimerval itimer;
+
+	/* Disable the interval timer: */
+	itimer.it_interval.tv_sec  = 0;
+	itimer.it_interval.tv_usec = 0;
+	itimer.it_value.tv_sec     = 0;
+	itimer.it_value.tv_usec    = 0;
+	setitimer(_ITIMER_SCHED_TIMER, &itimer, NULL);
+
+	/* Close the pthread kernel pipe: */
+	__sys_close(_thread_kern_pipe[0]);
+	__sys_close(_thread_kern_pipe[1]);
+
+	/*
+	 * Enter a loop to set all file descriptors to blocking
+	 * if they were not created as non-blocking:
+	 */
+	for (i = 0; i < _thread_dtablesize; i++) {
+		/* Check if this file descriptor is in use: */
+		if (_thread_fd_table[i] != NULL &&
+			!(_thread_fd_table[i]->flags & O_NONBLOCK)) {
+			/* Get the current flags: */
+			flags = __sys_fcntl(i, F_GETFL, NULL);
+			/* Clear the nonblocking file descriptor flag: */
+			__sys_fcntl(i, F_SETFL, flags & ~O_NONBLOCK);
+		}
+	}
+
+	/* Call the _exit syscall: */
+	__sys_exit(status);
+}
+
+void
+_thread_exit(char *fname, int lineno, char *string)
+{
+	char            s[256];
+
+	/* Prepare an error message string: */
+	snprintf(s, sizeof(s),
+	    "Fatal error '%s' at line %d in file %s (errno = %d)\n",
+	    string, lineno, fname, errno);
+
+	/* Write the string to the standard error file descriptor: */
+	__sys_write(2, s, strlen(s));
+
+	/* Force this process to exit: */
+	/* XXX - Do we want abort to be conditional on _PTHREADS_INVARIANTS? */
+#if defined(_PTHREADS_INVARIANTS)
+	abort();
+#else
+	__sys_exit(1);
+#endif
+}
+
+/*
+ * Only called when a thread is cancelled.  It may be more useful
+ * to call it from pthread_exit() if other ways of asynchronous or
+ * abnormal thread termination can be found.
+ */
+void
+_thread_exit_cleanup(void)
+{
+	struct pthread	*curthread = _get_curthread();
+
+	/*
+	 * POSIX states that cancellation/termination of a thread should
+	 * not release any visible resources (such as mutexes) and that
+	 * it is the applications responsibility.  Resources that are
+	 * internal to the threads library, including file and fd locks,
+	 * are not visible to the application and need to be released.
+	 */
+	/* Unlock all owned fd locks: */
+	_thread_fd_unlock_owned(curthread);
+
+	/* Unlock all private mutexes: */
+	_mutex_unlock_private(curthread);
+
+	/*
+	 * This still isn't quite correct because we don't account
+	 * for held spinlocks (see libc/stdlib/malloc.c).
+	 */
+}
+
+void
+_pthread_exit(void *status)
+{
+	struct pthread	*curthread = _get_curthread();
+	pthread_t pthread;
+
+	/* Check if this thread is already in the process of exiting: */
+	if ((curthread->flags & PTHREAD_EXITING) != 0) {
+		char msg[128];
+		snprintf(msg, sizeof(msg), "Thread %p has called pthread_exit() from a destructor. POSIX 1003.1 1996 s16.2.5.2 does not allow this!",curthread);
+		PANIC(msg);
+	}
+
+	/* Flag this thread as exiting: */
+	curthread->flags |= PTHREAD_EXITING;
+
+	/* Save the return value: */
+	curthread->ret = status;
+
+	while (curthread->cleanup != NULL) {
+		pthread_cleanup_pop(1);
+	}
+	if (curthread->attr.cleanup_attr != NULL) {
+		curthread->attr.cleanup_attr(curthread->attr.arg_attr);
+	}
+	/* Check if there is thread specific data: */
+	if (curthread->specific != NULL) {
+		/* Run the thread-specific data destructors: */
+		_thread_cleanupspecific();
+	}
+
+	/* Free thread-specific poll_data structure, if allocated: */
+	if (curthread->poll_data.fds != NULL) {
+		free(curthread->poll_data.fds);
+		curthread->poll_data.fds = NULL;
+	}
+
+	/*
+	 * Lock the garbage collector mutex to ensure that the garbage
+	 * collector is not using the dead thread list.
+	 */
+	if (pthread_mutex_lock(&_gc_mutex) != 0)
+		PANIC("Cannot lock gc mutex");
+
+	/* Add this thread to the list of dead threads. */
+	TAILQ_INSERT_HEAD(&_dead_list, curthread, dle);
+
+	/*
+	 * Signal the garbage collector thread that there is something
+	 * to clean up.
+	 */
+	if (pthread_cond_signal(&_gc_cond) != 0)
+		PANIC("Cannot signal gc cond");
+
+	/*
+	 * Avoid a race condition where a scheduling signal can occur
+	 * causing the garbage collector thread to run.  If this happens,
+	 * the current thread can be cleaned out from under us.
+	 */
+	_thread_kern_sig_defer();
+
+	/* Unlock the garbage collector mutex: */
+	if (pthread_mutex_unlock(&_gc_mutex) != 0)
+		PANIC("Cannot unlock gc mutex");
+
+	/* Check if there is a thread joining this one: */
+	if (curthread->joiner != NULL) {
+		pthread = curthread->joiner;
+		curthread->joiner = NULL;
+
+		switch (pthread->suspended) {
+		case SUSP_JOIN:
+			/*
+			 * The joining thread is suspended.  Change the
+			 * suspension state to make the thread runnable when it
+			 * is resumed:
+			 */
+			pthread->suspended = SUSP_NO;
+			break;
+		case SUSP_NO:
+			/* Make the joining thread runnable: */
+			PTHREAD_NEW_STATE(pthread, PS_RUNNING);
+			break;
+		default:
+			PANIC("Unreachable code reached");
+		}
+
+		/* Set the return value for the joining thread: */
+		pthread->join_status.ret = curthread->ret;
+		pthread->join_status.error = 0;
+		pthread->join_status.thread = NULL;
+
+		/* Make this thread collectable by the garbage collector. */
+		PTHREAD_ASSERT(((curthread->attr.flags & PTHREAD_DETACHED) ==
+		    0), "Cannot join a detached thread");
+		curthread->attr.flags |= PTHREAD_DETACHED;
+	}
+
+	/* Remove this thread from the thread list: */
+	TAILQ_REMOVE(&_thread_list, curthread, tle);
+
+	/* This thread will never be re-scheduled. */
+	_thread_kern_sched_state(PS_DEAD, __FILE__, __LINE__);
+
+	/* This point should not be reached. */
+	PANIC("Dead thread has resumed");
+}