mirror of git://gcc.gnu.org/git/gcc.git
107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
// -*- C++ -*- Exception handling routines for catching.
|
|
// Copyright (C) 2001 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of GNU CC.
|
|
//
|
|
// GNU CC 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.
|
|
//
|
|
// GNU CC 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 GNU CC; see the file COPYING. If not, write to
|
|
// the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
// Boston, MA 02111-1307, 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 <cstdlib>
|
|
#include "unwind-cxx.h"
|
|
|
|
using namespace __cxxabiv1;
|
|
|
|
|
|
extern "C" void *
|
|
__cxa_begin_catch (void *exc_obj_in)
|
|
{
|
|
_Unwind_Exception *exceptionObject
|
|
= reinterpret_cast <_Unwind_Exception *>(exc_obj_in);
|
|
|
|
// ??? Foreign exceptions can't be stacked here, and there doesn't
|
|
// appear to be any place to store for __cxa_end_catch to destroy.
|
|
|
|
__cxa_exception *header = __get_exception_header_from_ue (exceptionObject);
|
|
__cxa_eh_globals *globals = __cxa_get_globals ();
|
|
__cxa_exception *prev = globals->caughtExceptions;
|
|
int count = header->handlerCount;
|
|
|
|
if (count < 0)
|
|
// This exception was rethrown from an immediately enclosing region.
|
|
count = -count + 1;
|
|
else
|
|
count += 1;
|
|
header->handlerCount = count;
|
|
|
|
globals->uncaughtExceptions -= 1;
|
|
if (header != prev)
|
|
{
|
|
header->nextException = prev;
|
|
globals->caughtExceptions = header;
|
|
}
|
|
|
|
return header->adjustedPtr;
|
|
}
|
|
|
|
|
|
extern "C" void
|
|
__cxa_end_catch ()
|
|
{
|
|
__cxa_eh_globals *globals = __cxa_get_globals_fast ();
|
|
__cxa_exception *header = globals->caughtExceptions;
|
|
int count = header->handlerCount;
|
|
|
|
if (count < 0)
|
|
{
|
|
// This exception was rethrown. Decrement the (inverted) catch
|
|
// count and remove it from the chain when it reaches zero.
|
|
if (++count == 0)
|
|
{
|
|
globals->uncaughtExceptions += 1;
|
|
globals->caughtExceptions = header->nextException;
|
|
}
|
|
}
|
|
else if (--count == 0)
|
|
{
|
|
// Handling for this exception is complete. Destroy the object.
|
|
globals->caughtExceptions = header->nextException;
|
|
_Unwind_DeleteException (&header->unwindHeader);
|
|
return;
|
|
}
|
|
else if (count < 0)
|
|
// A bug in the exception handling library or compiler.
|
|
std::abort ();
|
|
|
|
header->handlerCount = count;
|
|
}
|
|
|
|
|
|
bool
|
|
std::uncaught_exception() throw()
|
|
{
|
|
__cxa_eh_globals *globals = __cxa_get_globals ();
|
|
return globals->uncaughtExceptions != 0;
|
|
}
|