xref: /gem5/ext/systemc/src/sysc/kernel/sc_except.cpp

/*****************************************************************************

  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
  more contributor license agreements.  See the NOTICE file distributed
  with this work for additional information regarding copyright ownership.
  Accellera licenses this file to you under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with the
  License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  implied.  See the License for the specific language governing
  permissions and limitations under the License.

 *****************************************************************************/

/*****************************************************************************

  sc_except.cpp -- kill/reset exception handling

  Original Author: Philipp A. Hartmann, OFFIS

 CHANGE LOG APPEARS AT THE END OF THE FILE
 *****************************************************************************/

#include "sysc/kernel/sc_cmnhdr.h"
//
#include "sysc/kernel/sc_except.h"
#include "sysc/kernel/sc_process.h"
//
#include "sysc/utils/sc_report.h"

namespace sc_core {

sc_unwind_exception::sc_unwind_exception( sc_process_b* proc_p, bool is_reset )
  : m_proc_p(proc_p), m_is_reset( is_reset )
{
  sc_assert( m_proc_p );
  m_proc_p->start_unwinding();
}

bool
sc_unwind_exception::active() const
{
  return m_proc_p && m_proc_p->is_unwinding();
}

void
sc_unwind_exception::clear() const
{
  sc_assert( m_proc_p );
  m_proc_p->clear_unwinding();
}

const char*
sc_unwind_exception::what() const throw()
{
  return ( m_is_reset ) ? "RESET" : "KILL";
}

sc_unwind_exception::~sc_unwind_exception() throw()
{
  if( active() ) {
      // can't throw an exception, since we're already throwing
      // -> abort instead
      SC_REPORT_FATAL( SC_ID_RETHROW_UNWINDING_, m_proc_p->name() );
  }
}

// handle and translate uncaught exceptions here
//
// These exceptions can either escape from sc_main() directly,
// indirectly from an SC_METHOD(), or are thrown from within
// an SC_(C)THREAD()
//
// returns a pointer to a dynamically allocated sc_report object,
// containing the caught message

sc_report*
sc_handle_exception()
{
    try {

        // re-throw exception here
        try { throw; }

        catch( sc_report & ) // to be on the safe side
        {
            throw; // continue
        }
        catch( sc_unwind_exception const & )
        {
            sc_assert( false && "Unhandled kill/reset, should never happen" );
        }
        catch( std::exception const & x )
        {
            SC_REPORT_ERROR( SC_ID_SIMULATION_UNCAUGHT_EXCEPTION_, x.what() );
        }
        catch( char const * x )
        {
            SC_REPORT_ERROR( SC_ID_SIMULATION_UNCAUGHT_EXCEPTION_, x );
        }
        catch( ... )
        {
            SC_REPORT_ERROR( SC_ID_SIMULATION_UNCAUGHT_EXCEPTION_,
                             "UNKNOWN EXCEPTION" );
        }
    }
    // everything is an sc_report now
    catch( sc_report & rpt )
    {
        sc_report* rpt_p = new sc_report;
        rpt_p->swap( rpt );
        return rpt_p;
    }
    return 0;
}

} // namespace sc_core

// $Log: sc_except.cpp,v $
// Revision 1.4  2011/08/26 20:46:09  acg
//  Andy Goodrich: moved the modification log to the end of the file to
//  eliminate source line number skew when check-ins are done.
//
// Revision 1.3  2011/05/09 04:07:48  acg
//  Philipp A. Hartmann:
//    (1) Restore hierarchy in all phase callbacks.
//    (2) Ensure calls to before_end_of_elaboration.
//
// Revision 1.2  2011/02/13 21:47:37  acg
//  Andy Goodrich: update copyright notice.
//
// Revision 1.1  2011/02/10 22:47:38  acg
//  Andy Goodrich: first check in of Philipp A. Hartmann's new exception
//  processing code.
//

// Taf!