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 - Added reserved member at top of struct. Who the hell does that?
51        https://reviews.llvm.org/rG674ec1eb16678b8addc02a4b0534ab383d22fa77
52        NOTE: Apple clang version != real LLVM version. Don't be fooled!
53     */
54 #if 0
55     void *reserved;
56 #endif
57     size_t referenceCount;
58     ::std::type_info *exceptionType;
59     void (*exceptionDestructor)(void *);
60     ::std::unexpected_handler unexpectedHandler;
61     ::std::terminate_handler terminateHandler;
62     __cxa_exception *nextException;
63     int handlerCount;
64     int handlerSwitchValue;
65     const unsigned char *actionRecord;
66     const unsigned char *languageSpecificData;
67     void *catchTemp;
68     void *adjustedPtr;
69     _Unwind_Exception unwindHeader;
70 };
71 
72 extern "C" void *__cxa_allocate_exception(
73     std::size_t thrown_size ) throw();
74 extern "C" void __cxa_throw (
75     void *thrown_exception, std::type_info *tinfo, void (*dest) (void *) ) __attribute__((noreturn));
76 
77 struct __cxa_eh_globals
78 {
79     __cxa_exception *caughtExceptions;
80     unsigned int uncaughtExceptions;
81 };
82 extern "C" __cxa_eh_globals *__cxa_get_globals () throw();
83 
84 // -----
85 
86 // on OSX 64bit the class_type_info classes are specified
87 // in http://refspecs.linuxbase.org/cxxabi-1.86.html#rtti but
88 // these details are not generally available in a public header
89 // of most development environments. So we define them here.
90 // NOTE: https://www.hexblog.com/wp-content/uploads/2012/06/Recon-2012-Skochinsky-Compiler-Internals.pdf
91 class __class_type_info : public std::type_info
92 {
93 public:
__class_type_info(const char * pRttiName)94         explicit __class_type_info( const char* pRttiName)
95         : std::type_info( pRttiName)
96         {}
97 };
98 
99 class __si_class_type_info : public __class_type_info
100 {
101         const __class_type_info* mpBaseType;
102 public:
__si_class_type_info(const char * pRttiName,__class_type_info * pBaseType)103         explicit __si_class_type_info( const char* pRttiName, __class_type_info* pBaseType)
104         : __class_type_info( pRttiName), mpBaseType( pBaseType)
105         {}
106 };
107 
108 //==================================================================================================
109 void raiseException(
110     uno_Any * pUnoExc, uno_Mapping * pUno2Cpp );
111 //==================================================================================================
112 void fillUnoException(
113     __cxa_exception * header, uno_Any *, uno_Mapping * pCpp2Uno );
114 }
115 
116