1 //===------------------------- cxa_exception.cpp --------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 // 8 // This file implements the "Exception Handling APIs" 9 // https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html 10 // 11 //===----------------------------------------------------------------------===// 12 13 // Support functions for the no-exceptions libc++ library 14 15 #include "cxxabi.h" 16 17 #include <exception> // for std::terminate 18 #include "cxa_exception.h" 19 #include "cxa_handlers.h" 20 21 namespace __cxxabiv1 { 22 23 extern "C" { 24 25 void __cxa_increment_exception_refcount(void * thrown_object)26__cxa_increment_exception_refcount(void *thrown_object) throw() { 27 if (thrown_object != nullptr) 28 std::terminate(); 29 } 30 31 void __cxa_decrement_exception_refcount(void * thrown_object)32__cxa_decrement_exception_refcount(void *thrown_object) throw() { 33 if (thrown_object != nullptr) 34 std::terminate(); 35 } 36 37 __cxa_current_primary_exception()38void *__cxa_current_primary_exception() throw() { return nullptr; } 39 40 void __cxa_rethrow_primary_exception(void * thrown_object)41__cxa_rethrow_primary_exception(void* thrown_object) { 42 if (thrown_object != nullptr) 43 std::terminate(); 44 } 45 46 bool __cxa_uncaught_exception()47__cxa_uncaught_exception() throw() { return false; } 48 49 unsigned int __cxa_uncaught_exceptions()50__cxa_uncaught_exceptions() throw() { return 0; } 51 52 } // extern "C" 53 54 // provide dummy implementations for the 'no exceptions' case. __getExceptionClass(const _Unwind_Exception *)55uint64_t __getExceptionClass (const _Unwind_Exception*) { return 0; } __setExceptionClass(_Unwind_Exception *,uint64_t)56void __setExceptionClass ( _Unwind_Exception*, uint64_t) {} __isOurExceptionClass(const _Unwind_Exception *)57bool __isOurExceptionClass(const _Unwind_Exception*) { return false; } 58 59 } // abi 60