1 //===------------------------- cxa_exception.hpp --------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 // 9 // This file implements the "Exception Handling APIs" 10 // http://mentorembedded.github.io/cxx-abi/abi-eh.html 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef _CXA_EXCEPTION_H 15 #define _CXA_EXCEPTION_H 16 17 #include <exception> // for std::unexpected_handler and std::terminate_handler 18 #include "cxxabi.h" 19 #include "unwind.h" 20 21 namespace __cxxabiv1 { 22 23 static const uint64_t kOurExceptionClass = 0x434C4E47432B2B00; // CLNGC++\0 24 static const uint64_t kOurDependentExceptionClass = 0x434C4E47432B2B01; // CLNGC++\1 25 static const uint64_t get_vendor_and_language = 0xFFFFFFFFFFFFFF00; // mask for CLNGC++ 26 27 struct _LIBCXXABI_HIDDEN __cxa_exception { 28 #if defined(__LP64__) || defined(_LIBCXXABI_ARM_EHABI) 29 // This is a new field to support C++ 0x exception_ptr. 30 // For binary compatibility it is at the start of this 31 // struct which is prepended to the object thrown in 32 // __cxa_allocate_exception. 33 size_t referenceCount; 34 #endif 35 36 // Manage the exception object itself. 37 std::type_info *exceptionType; 38 void (*exceptionDestructor)(void *); 39 std::unexpected_handler unexpectedHandler; 40 std::terminate_handler terminateHandler; 41 42 __cxa_exception *nextException; 43 44 int handlerCount; 45 46 #if defined(_LIBCXXABI_ARM_EHABI) 47 __cxa_exception* nextPropagatingException; 48 int propagationCount; 49 #else 50 int handlerSwitchValue; 51 const unsigned char *actionRecord; 52 const unsigned char *languageSpecificData; 53 void *catchTemp; 54 void *adjustedPtr; 55 #endif 56 57 #if !defined(__LP64__) && !defined(_LIBCXXABI_ARM_EHABI) 58 // This is a new field to support C++ 0x exception_ptr. 59 // For binary compatibility it is placed where the compiler 60 // previously adding padded to 64-bit align unwindHeader. 61 size_t referenceCount; 62 #endif 63 _Unwind_Exception unwindHeader; 64 }; 65 66 // http://sourcery.mentor.com/archives/cxx-abi-dev/msg01924.html 67 // The layout of this structure MUST match the layout of __cxa_exception, with 68 // primaryException instead of referenceCount. 69 struct _LIBCXXABI_HIDDEN __cxa_dependent_exception { 70 #if defined(__LP64__) || defined(_LIBCXXABI_ARM_EHABI) 71 void* primaryException; 72 #endif 73 74 std::type_info *exceptionType; 75 void (*exceptionDestructor)(void *); 76 std::unexpected_handler unexpectedHandler; 77 std::terminate_handler terminateHandler; 78 79 __cxa_exception *nextException; 80 81 int handlerCount; 82 83 #if defined(_LIBCXXABI_ARM_EHABI) 84 __cxa_exception* nextPropagatingException; 85 int propagationCount; 86 #else 87 int handlerSwitchValue; 88 const unsigned char *actionRecord; 89 const unsigned char *languageSpecificData; 90 void * catchTemp; 91 void *adjustedPtr; 92 #endif 93 94 #if !defined(__LP64__) && !defined(_LIBCXXABI_ARM_EHABI) 95 void* primaryException; 96 #endif 97 _Unwind_Exception unwindHeader; 98 }; 99 100 struct _LIBCXXABI_HIDDEN __cxa_eh_globals { 101 __cxa_exception * caughtExceptions; 102 unsigned int uncaughtExceptions; 103 #if defined(_LIBCXXABI_ARM_EHABI) 104 __cxa_exception* propagatingExceptions; 105 #endif 106 }; 107 108 extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals (); 109 extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals_fast (); 110 111 extern "C" _LIBCXXABI_FUNC_VIS void * __cxa_allocate_dependent_exception (); 112 extern "C" _LIBCXXABI_FUNC_VIS void __cxa_free_dependent_exception (void * dependent_exception); 113 114 } // namespace __cxxabiv1 115 116 #endif // _CXA_EXCEPTION_H 117
