1 /*
2 * Copyright 2010-2011 PathScale, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
15 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 /**
28 * aux.cc - Compiler helper functions.
29 *
30 * The functions declared in this file are intended to be called only by code
31 * that is automatically generated by C++ compilers for some common cases.
32 */
33
34 #include <stdlib.h>
35 #include "stdexcept.h"
36
37 namespace {
38 /**
39 * Throw an exception if we're compiling with exceptions, otherwise abort.
40 */
41 template<typename T>
throw_exception()42 void throw_exception()
43 {
44 #if !defined(_CXXRT_NO_EXCEPTIONS)
45 throw T();
46 #else
47 abort();
48 #endif
49 }
50 }
51
52 /**
53 * Called to generate a bad cast exception. This function is intended to allow
54 * compilers to insert code generating this exception without needing to
55 * duplicate the code for throwing the exception in every call site.
56 */
__cxa_bad_cast()57 extern "C" void __cxa_bad_cast()
58 {
59 throw_exception<std::bad_cast>();
60 }
61
62 /**
63 * Called to generate a bad typeid exception. This function is intended to
64 * allow compilers to insert code generating this exception without needing to
65 * duplicate the code for throwing the exception in every call site.
66 */
__cxa_bad_typeid()67 extern "C" void __cxa_bad_typeid()
68 {
69 throw_exception<std::bad_typeid>();
70 }
71
72 /**
73 * Compilers may (but are not required to) set any pure-virtual function's
74 * vtable entry to this function. This makes debugging slightly easier, as
75 * users can add a breakpoint on this function to tell if they've accidentally
76 * called a pure-virtual function.
77 */
__cxa_pure_virtual()78 extern "C" void __cxa_pure_virtual()
79 {
80 abort();
81 }
82
83 /**
84 * Compilers may (but are not required to) set any deleted-virtual function's
85 * vtable entry to this function. This makes debugging slightly easier, as
86 * users can add a breakpoint on this function to tell if they've accidentally
87 * called a deleted-virtual function.
88 */
__cxa_deleted_virtual()89 extern "C" void __cxa_deleted_virtual()
90 {
91 abort();
92 }
93
__cxa_throw_bad_array_new_length()94 extern "C" void __cxa_throw_bad_array_new_length()
95 {
96 throw_exception<std::bad_array_new_length>();
97 }
98