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> 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 */ 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 */ 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 */ 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 */ 89 extern "C" void __cxa_deleted_virtual() 90 { 91 abort(); 92 } 93 94 extern "C" void __cxa_throw_bad_array_new_length() 95 { 96 throw_exception<std::bad_array_new_length>(); 97 } 98