// -*- C++ -*- Exception handling routines for catching.
-// Copyright (C) 2001 Free Software Foundation, Inc.
+// Copyright (C) 2001, 2003, 2004, 2009 Free Software Foundation, Inc.
//
-// This file is part of GNU CC.
+// This file is part of GCC.
//
-// GNU CC is free software; you can redistribute it and/or modify
+// 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)
+// the Free Software Foundation; either version 3, or (at your option)
// any later version.
//
-// GNU CC is distributed in the hope that it will be useful,
+// 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 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.
+// 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
+// <http://www.gnu.org/licenses/>.
#include <cstdlib>
#include "unwind-cxx.h"
using namespace __cxxabiv1;
-
extern "C" void *
-__cxa_begin_catch (void *exc_obj_in)
+__cxxabiv1::__cxa_get_exception_ptr(void *exc_obj_in) throw()
{
_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.
+ return __gxx_caught_object(exceptionObject);
+}
- __cxa_exception *header = __get_exception_header_from_ue (exceptionObject);
+extern "C" void *
+__cxxabiv1::__cxa_begin_catch (void *exc_obj_in) throw()
+{
+ _Unwind_Exception *exceptionObject
+ = reinterpret_cast <_Unwind_Exception *>(exc_obj_in);
__cxa_eh_globals *globals = __cxa_get_globals ();
__cxa_exception *prev = globals->caughtExceptions;
- int count = header->handlerCount;
+ __cxa_exception *header = __get_exception_header_from_ue (exceptionObject);
+ void* objectp;
+
+ // Foreign exceptions can't be stacked here. If the exception stack is
+ // empty, then fine. Otherwise we really have no choice but to terminate.
+ // Note that this use of "header" is a lie. It's fine so long as we only
+ // examine header->unwindHeader though.
+ if (!__is_gxx_exception_class(header->unwindHeader.exception_class))
+ {
+ if (prev != 0)
+ std::terminate ();
+
+ // Remember for end_catch and rethrow.
+ globals->caughtExceptions = header;
+ // ??? No sensible value to return; we don't know what the
+ // object is, much less where it is in relation to the header.
+ return 0;
+ }
+
+ int count = header->handlerCount;
+ // Count is less than zero if this exception was rethrown from an
+ // immediately enclosing region.
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;
+ objectp = __gxx_caught_object(exceptionObject);
+#ifdef __ARM_EABI_UNWINDER__
+ _Unwind_Complete(exceptionObject);
+#endif
+ return objectp;
}
extern "C" void
-__cxa_end_catch ()
+__cxxabiv1::__cxa_end_catch ()
{
__cxa_eh_globals *globals = __cxa_get_globals_fast ();
__cxa_exception *header = globals->caughtExceptions;
- int count = header->handlerCount;
+ // A rethrow of a foreign exception will be removed from the
+ // the exception stack immediately by __cxa_rethrow.
+ if (!header)
+ return;
+
+ // A foreign exception couldn't have been stacked (see above),
+ // so by definition processing must be complete.
+ if (!__is_gxx_exception_class(header->unwindHeader.exception_class))
+ {
+ globals->caughtExceptions = 0;
+ _Unwind_DeleteException (&header->unwindHeader);
+ return;
+ }
+
+ 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;
- }
+ globals->caughtExceptions = header->nextException;
}
else if (--count == 0)
{
}
else if (count < 0)
// A bug in the exception handling library or compiler.
- std::abort ();
+ std::terminate ();
header->handlerCount = count;
}
projects / msp430-gcc.git / blobdiff