Subversion Repositories scarts

// -*- C++ -*- Exception handling routines for throwing.

// Copyright (C) 2001, 2003 Free Software Foundation, Inc.

//

// This file is part of GCC.

//

// GCC is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation; either version 2, or (at your option)

// any later version.

//

// GCC is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with GCC; see the file COPYING.  If not, write to

// the Free Software Foundation, 51 Franklin Street, Fifth Floor,

// Boston, MA 02110-1301, USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

#include <bits/c++config.h>

#include "unwind-cxx.h"

using namespace __cxxabiv1;

static void

__gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc)

{

  __cxa_exception *header = __get_exception_header_from_ue (exc);

  // If we haven't been caught by a foreign handler, then this is

  // some sort of unwind error.  In that case just die immediately.

  // _Unwind_DeleteException in the HP-UX IA64 libunwind library

  //  returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT

  // like the GCC _Unwind_DeleteException function does.

  if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON)

    __terminate (header->terminateHandler);

  if (header->exceptionDestructor)

    header->exceptionDestructor (header + 1);

  __cxa_free_exception (header + 1);

}

extern "C" void

__cxxabiv1::__cxa_throw (void *obj, std::type_info *tinfo,

                         void (*dest) (void *))

{

  __cxa_exception *header = __get_exception_header_from_obj (obj);

  header->exceptionType = tinfo;

  header->exceptionDestructor = dest;

  header->unexpectedHandler = __unexpected_handler;

  header->terminateHandler = __terminate_handler;

  __GXX_INIT_EXCEPTION_CLASS(header->unwindHeader.exception_class);

  header->unwindHeader.exception_cleanup = __gxx_exception_cleanup;

#ifdef _GLIBCXX_SJLJ_EXCEPTIONS

  _Unwind_SjLj_RaiseException (&header->unwindHeader);

#else

  _Unwind_RaiseException (&header->unwindHeader);

#endif

  // Some sort of unwinding error.  Note that terminate is a handler.

  __cxa_begin_catch (&header->unwindHeader);

  std::terminate ();

}

extern "C" void

__cxxabiv1::__cxa_rethrow ()

{

  __cxa_eh_globals *globals = __cxa_get_globals ();

  __cxa_exception *header = globals->caughtExceptions;

  globals->uncaughtExceptions += 1;

  // Watch for luser rethrowing with no active exception.

  if (header)

    {

      // Tell __cxa_end_catch this is a rethrow.

      if (!__is_gxx_exception_class(header->unwindHeader.exception_class))

        globals->caughtExceptions = 0;

      else

        header->handlerCount = -header->handlerCount;

#ifdef _GLIBCXX_SJLJ_EXCEPTIONS

      _Unwind_SjLj_Resume_or_Rethrow (&header->unwindHeader);

#else

#if defined(_LIBUNWIND_STD_ABI)

      _Unwind_RaiseException (&header->unwindHeader);

#else

      _Unwind_Resume_or_Rethrow (&header->unwindHeader);

#endif

#endif

      // Some sort of unwinding error.  Note that terminate is a handler.

      __cxa_begin_catch (&header->unwindHeader);

    }

  std::terminate ();

}