1183724Ssos// -*- C++ -*- Exception handling routines for throwing. 2183724Ssos// Copyright (C) 2001, 2003 Free Software Foundation, Inc. 3183724Ssos// 4183724Ssos// This file is part of GCC. 5183724Ssos// 6183724Ssos// GCC is free software; you can redistribute it and/or modify 7183724Ssos// it under the terms of the GNU General Public License as published by 8183724Ssos// the Free Software Foundation; either version 2, or (at your option) 9183724Ssos// any later version. 10183724Ssos// 11183724Ssos// GCC is distributed in the hope that it will be useful, 12183724Ssos// but WITHOUT ANY WARRANTY; without even the implied warranty of 13183724Ssos// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14183724Ssos// GNU General Public License for more details. 15183724Ssos// 16183724Ssos// You should have received a copy of the GNU General Public License 17183724Ssos// along with GCC; see the file COPYING. If not, write to 18183724Ssos// the Free Software Foundation, 51 Franklin Street, Fifth Floor, 19183724Ssos// Boston, MA 02110-1301, USA. 20183724Ssos 21183724Ssos// As a special exception, you may use this file as part of a free software 22183724Ssos// library without restriction. Specifically, if other files instantiate 23183724Ssos// templates or use macros or inline functions from this file, or you compile 24183724Ssos// this file and link it with other files to produce an executable, this 25183724Ssos// file does not by itself cause the resulting executable to be covered by 26183724Ssos// the GNU General Public License. This exception does not however 27183724Ssos// invalidate any other reasons why the executable file might be covered by 28183724Ssos// the GNU General Public License. 29183724Ssos 30183724Ssos#include <bits/c++config.h> 31183724Ssos#include "unwind-cxx.h" 32183724Ssos 33183724Ssosusing namespace __cxxabiv1; 34183724Ssos 35183724Ssos 36183724Ssosstatic void 37183724Ssos__gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc) 38183724Ssos{ 39183724Ssos __cxa_exception *header = __get_exception_header_from_ue (exc); 40183724Ssos 41183724Ssos // If we haven't been caught by a foreign handler, then this is 42183724Ssos // some sort of unwind error. In that case just die immediately. 43183724Ssos // _Unwind_DeleteException in the HP-UX IA64 libunwind library 44183724Ssos // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT 45183724Ssos // like the GCC _Unwind_DeleteException function does. 46183724Ssos if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON) 47183724Ssos __terminate (header->terminateHandler); 48183724Ssos 49183724Ssos if (header->exceptionDestructor) 50183724Ssos header->exceptionDestructor (header + 1); 51183724Ssos 52183724Ssos __cxa_free_exception (header + 1); 53183724Ssos} 54183724Ssos 55183724Ssos 56200171Smavextern "C" void 57200171Smav__cxxabiv1::__cxa_throw (void *obj, std::type_info *tinfo, 58183724Ssos void (*dest) (void *)) 59183724Ssos{ 60183724Ssos __cxa_exception *header = __get_exception_header_from_obj (obj); 61183724Ssos header->exceptionType = tinfo; 62183724Ssos header->exceptionDestructor = dest; 63183724Ssos header->unexpectedHandler = __unexpected_handler; 64183724Ssos header->terminateHandler = __terminate_handler; 65183724Ssos __GXX_INIT_EXCEPTION_CLASS(header->unwindHeader.exception_class); 66233717Smarius header->unwindHeader.exception_cleanup = __gxx_exception_cleanup; 67242908Sdim 68183724Ssos#ifdef _GLIBCXX_SJLJ_EXCEPTIONS 69199322Smav _Unwind_SjLj_RaiseException (&header->unwindHeader); 70240199Smav#else 71199322Smav _Unwind_RaiseException (&header->unwindHeader); 72199322Smav#endif 73199322Smav 74183724Ssos // Some sort of unwinding error. Note that terminate is a handler. 75183724Ssos __cxa_begin_catch (&header->unwindHeader); 76183724Ssos std::terminate (); 77183724Ssos} 78183724Ssos 79183724Ssosextern "C" void 80183724Ssos__cxxabiv1::__cxa_rethrow () 81183724Ssos{ 82183724Ssos __cxa_eh_globals *globals = __cxa_get_globals (); 83183724Ssos __cxa_exception *header = globals->caughtExceptions; 84200171Smav 85200171Smav globals->uncaughtExceptions += 1; 86183724Ssos 87183724Ssos // Watch for luser rethrowing with no active exception. 88183724Ssos if (header) 89194893Smav { 90183724Ssos // Tell __cxa_end_catch this is a rethrow. 91183724Ssos if (!__is_gxx_exception_class(header->unwindHeader.exception_class)) 92183724Ssos globals->caughtExceptions = 0; 93183724Ssos else 94183724Ssos header->handlerCount = -header->handlerCount; 95183724Ssos 96199322Smav#ifdef _GLIBCXX_SJLJ_EXCEPTIONS 97183724Ssos _Unwind_SjLj_Resume_or_Rethrow (&header->unwindHeader); 98183724Ssos#else 99183724Ssos#if defined(_LIBUNWIND_STD_ABI) 100183724Ssos _Unwind_RaiseException (&header->unwindHeader); 101183724Ssos#else 102183724Ssos _Unwind_Resume_or_Rethrow (&header->unwindHeader); 103183724Ssos#endif 104183724Ssos#endif 105183724Ssos 106183724Ssos // Some sort of unwinding error. Note that terminate is a handler. 107183724Ssos __cxa_begin_catch (&header->unwindHeader); 108200171Smav } 109188769Smav std::terminate (); 110183724Ssos} 111183724Ssos