• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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))
__on_dlclose()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