1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include "namespace.h" 33 #include <stdlib.h> 34 #include <unistd.h> 35 #include "un-namespace.h" 36 37 #include "atexit.h" 38 #include "libc_private.h" 39 40 void (*__cleanup)(void); 41 42 /* 43 * This variable is zero until a process has created a thread. 44 * It is used to avoid calling locking functions in libc when they 45 * are not required. By default, libc is intended to be(come) 46 * thread-safe, but without a (significant) penalty to non-threaded 47 * processes. 48 */ 49 int __isthreaded = 0; 50 51 /* 52 * Exit, flushing stdio buffers if necessary. 53 */ 54 void 55 exit(int status) 56 { 57 /* Ensure that the auto-initialization routine is linked in: */ 58 extern int _thread_autoinit_dummy_decl; 59 60 _thread_autoinit_dummy_decl = 1; 61 62 /* 63 * We're dealing with cleaning up thread_local destructors in the case of 64 * the process termination through main() exit. 65 * Other cases are handled elsewhere. 66 */ 67 __cxa_thread_call_dtors(); 68 __cxa_finalize(NULL); 69 if (__cleanup) 70 (*__cleanup)(); 71 _exit(status); 72 } 73