113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
// -*- C++ -*- Exception handling routines for throwing.
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// Copyright (C) 2001, 2003 Free Software Foundation, Inc.
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//
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// This file is part of GNU CC.
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//
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// GNU CC is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2, or (at your option)
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// any later version.
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//
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// GNU CC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with GNU CC; see the file COPYING. If not, write to
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// the Free Software Foundation, 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#include <bits/c++config.h>
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#include "unwind-cxx.h"
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using namespace __cxxabiv1;
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static void
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__gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc)
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{
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__cxa_exception *header = __get_exception_header_from_ue (exc);
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// If we haven't been caught by a foreign handler, then this is
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// some sort of unwind error. In that case just die immediately.
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// _Unwind_DeleteException in the HP-UX IA64 libunwind library
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// returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT
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// like the GCC _Unwind_DeleteException function does.
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if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON)
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__terminate (header->terminateHandler);
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if (header->exceptionDestructor)
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header->exceptionDestructor (header + 1);
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__cxa_free_exception (header + 1);
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}
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extern "C" void
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__cxa_throw (void *obj, std::type_info *tinfo, void (*dest) (void *))
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{
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__cxa_exception *header = __get_exception_header_from_obj (obj);
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header->exceptionType = tinfo;
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header->exceptionDestructor = dest;
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header->unexpectedHandler = __unexpected_handler;
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header->terminateHandler = __terminate_handler;
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header->unwindHeader.exception_class = __gxx_exception_class;
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header->unwindHeader.exception_cleanup = __gxx_exception_cleanup;
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__cxa_eh_globals *globals = __cxa_get_globals ();
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globals->uncaughtExceptions += 1;
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#ifdef _GLIBCPP_SJLJ_EXCEPTIONS
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_Unwind_SjLj_RaiseException (&header->unwindHeader);
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#else
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_Unwind_RaiseException (&header->unwindHeader);
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#endif
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// Some sort of unwinding error. Note that terminate is a handler.
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__cxa_begin_catch (&header->unwindHeader);
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std::terminate ();
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}
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extern "C" void
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__cxa_rethrow ()
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{
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__cxa_eh_globals *globals = __cxa_get_globals ();
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__cxa_exception *header = globals->caughtExceptions;
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// Watch for luser rethrowing with no active exception.
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if (header)
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{
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// Tell __cxa_end_catch this is a rethrow.
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if (header->unwindHeader.exception_class != __gxx_exception_class)
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globals->caughtExceptions = 0;
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else
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header->handlerCount = -header->handlerCount;
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#ifdef _GLIBCPP_SJLJ_EXCEPTIONS
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_Unwind_SjLj_Resume_or_Rethrow (&header->unwindHeader);
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#else
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#ifdef _LIBUNWIND_STD_ABI
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_Unwind_RaiseException (&header->unwindHeader);
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#else
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_Unwind_Resume_or_Rethrow (&header->unwindHeader);
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#endif
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#endif
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// Some sort of unwinding error. Note that terminate is a handler.
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__cxa_begin_catch (&header->unwindHeader);
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}
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std::terminate ();
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}
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