1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/types.h> 30 #include <stdio.h> 31 32 #include <async_safe/log.h> 33 34 /* 35 * This source file should only be included by libc.so, its purpose is 36 * to support legacy ARM binaries by exporting a publicly visible 37 * implementation of atexit(). 38 */ 39 40 extern int __cxa_atexit(void (*func)(void *), void *arg, void *dso); 41 42 /* 43 * Register a function to be performed at exit. 44 */ 45 int 46 atexit(void (*func)(void)) 47 { 48 /* 49 * Exit functions queued by this version of atexit will not be called 50 * on dlclose(), and when they are called (at program exit), the 51 * calling library may have been dlclose()'d, causing the program to 52 * crash. 53 */ 54 static char const warning[] = "WARNING: generic atexit() called from legacy shared library\n"; 55 56 async_safe_format_log(ANDROID_LOG_WARN, "libc", warning); 57 fprintf(stderr, warning); 58 59 return (__cxa_atexit((void (*)(void *))func, NULL, NULL)); 60 } 61
