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

// Copyright (C) 2001-2013 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 3, 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.

//

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

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

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// .

#include 

#include "unwind-cxx.h"

using namespace __cxxabiv1;

static void

__gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc)

{

  // This cleanup is set only for primaries.

  __cxa_refcounted_exception *header

    = __get_refcounted_exception_header_from_ue (exc);

  // We only want to be called through _Unwind_DeleteException.

  // _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->exc.terminateHandler);

#if ATOMIC_INT_LOCK_FREE > 1

  if (__atomic_sub_fetch (&header->referenceCount, 1, __ATOMIC_ACQ_REL) == 0)

    {

#endif

      if (header->exc.exceptionDestructor)

	header->exc.exceptionDestructor (header + 1);

      __cxa_free_exception (header + 1);

#if ATOMIC_INT_LOCK_FREE > 1

    }

#endif

}

extern "C" void

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

			 void (_GLIBCXX_CDTOR_CALLABI *dest) (void *))

{

  PROBE2 (throw, obj, tinfo);

  __cxa_eh_globals *globals = __cxa_get_globals ();

  globals->uncaughtExceptions += 1;

  // Definitely a primary.

  __cxa_refcounted_exception *header

    = __get_refcounted_exception_header_from_obj (obj);

  header->referenceCount = 1;

  header->exc.exceptionType = tinfo;

  header->exc.exceptionDestructor = dest;

  header->exc.unexpectedHandler = __unexpected_handler;

  header->exc.terminateHandler = __terminate_handler;

  __GXX_INIT_PRIMARY_EXCEPTION_CLASS(header->exc.unwindHeader.exception_class);

  header->exc.unwindHeader.exception_cleanup = __gxx_exception_cleanup;

#ifdef _GLIBCXX_SJLJ_EXCEPTIONS

  _Unwind_SjLj_RaiseException (&header->exc.unwindHeader);

#else

  _Unwind_RaiseException (&header->exc.unwindHeader);

#endif

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

  __cxa_begin_catch (&header->exc.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;

	  // Only notify probe for C++ exceptions.

	  PROBE2 (rethrow, __get_object_from_ambiguous_exception(header),

		  header->exceptionType);

	}

#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 ();

}