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 extern void __cxa_finalize(void *); 30 extern void *__dso_handle; 31 32 __attribute__((visibility("hidden"),destructor)) 33 void __on_dlclose() { 34 __cxa_finalize(&__dso_handle); 35 } 36 37 /* CRT_LEGACY_WORKAROUND should only be defined when building 38 * this file as part of the platform's C library. 39 * 40 * The C library already defines a function named 'atexit()' 41 * for backwards compatibility with older NDK-generated binaries. 42 * 43 * For newer ones, 'atexit' is actually embedded in the C 44 * runtime objects that are linked into the final ELF 45 * binary (shared library or executable), and will call 46 * __cxa_atexit() in order to un-register any atexit() 47 * handler when a library is unloaded. 48 * 49 * This function must be global *and* hidden. Only the 50 * code inside the same ELF binary should be able to access it. 51 */ 52 53 #ifdef CRT_LEGACY_WORKAROUND 54 #include "__dso_handle.h" 55 #else 56 #include "__dso_handle_so.h" 57 #include "atexit.h" 58 #endif 59
