1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #include "uno/mapping.h" 25 26 #include <typeinfo> 27 #include <exception> 28 #include <cstddef> 29 30 namespace CPPU_CURRENT_NAMESPACE 31 { 32 33 void dummy_can_throw_anything( char const * ); 34 35 typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__))); 36 37 // ----- the following structure is compatible with the one declared in libunwind's unwind.h 38 // (use forced types) 39 40 struct _Unwind_Exception 41 { 42 uint64_t exception_class; 43 void * exception_cleanup; 44 uintptr_t private_1; 45 uintptr_t private_2; 46 }; 47 48 struct __cxa_exception 49 { 50 /* From LLVM 10 a reserved member was added at the top of the struct on 51 64-bit targets. Who the hell does that? 52 https://reviews.llvm.org/rG674ec1eb16678b8addc02a4b0534ab383d22fa77 53 It is required on arm64 (Apple Silicon): the trailing _Unwind_Exception 54 must be 16-byte aligned within the allocation, and only WITH this member 55 does unwindHeader land at a 16-byte boundary (offset 96, vs a misaligned 56 88 without it). Verified empirically against this host's libc++abi. 57 NOTE: Apple clang version != upstream LLVM version. */ 58 void *reserved; 59 size_t referenceCount; 60 ::std::type_info *exceptionType; 61 void (*exceptionDestructor)(void *); 62 ::std::unexpected_handler unexpectedHandler; 63 ::std::terminate_handler terminateHandler; 64 __cxa_exception *nextException; 65 int handlerCount; 66 int handlerSwitchValue; 67 const unsigned char *actionRecord; 68 const unsigned char *languageSpecificData; 69 void *catchTemp; 70 void *adjustedPtr; 71 _Unwind_Exception unwindHeader; 72 }; 73 74 extern "C" void *__cxa_allocate_exception( 75 std::size_t thrown_size ) throw(); 76 extern "C" void __cxa_throw ( 77 void *thrown_exception, std::type_info *tinfo, void (*dest) (void *) ) __attribute__((noreturn)); 78 79 struct __cxa_eh_globals 80 { 81 __cxa_exception *caughtExceptions; 82 unsigned int uncaughtExceptions; 83 }; 84 extern "C" __cxa_eh_globals *__cxa_get_globals () throw(); 85 extern "C" std::type_info *__cxa_current_exception_type(); 86 87 // ----- 88 89 // on OSX 64bit the class_type_info classes are specified 90 // in http://refspecs.linuxbase.org/cxxabi-1.86.html#rtti but 91 // these details are not generally available in a public header 92 // of most development environments. So we define them here. 93 // NOTE: https://www.hexblog.com/wp-content/uploads/2012/06/Recon-2012-Skochinsky-Compiler-Internals.pdf 94 class __class_type_info : public std::type_info 95 { 96 public: 97 explicit __class_type_info( const char* pRttiName) 98 : std::type_info( pRttiName) 99 {} 100 }; 101 102 class __si_class_type_info : public __class_type_info 103 { 104 const __class_type_info* mpBaseType; 105 public: 106 explicit __si_class_type_info( const char* pRttiName, __class_type_info* pBaseType) 107 : __class_type_info( pRttiName), mpBaseType( pBaseType) 108 {} 109 }; 110 111 //================================================================================================== 112 void raiseException( 113 uno_Any * pUnoExc, uno_Mapping * pUno2Cpp ); 114 //================================================================================================== 115 void fillUnoException( 116 __cxa_exception * header, uno_Any *, uno_Mapping * pCpp2Uno ); 117 void fillUnoException( 118 std::type_info const & type, void * exception, uno_Any *, 119 uno_Mapping * pCpp2Uno ); 120 } 121