30a333ceeb
2008-08-23 Paolo Carlini <paolo.carlini@oracle.com>
* testsuite/lib/libstdc++.exp (check_v3_target_atomic_builtins): Add.
* testsuite/lib/dg-options.exp (dg-require-atomic-builtins): Likewise.
* testsuite/18_support/exception_ptr/current_exception.cc: Use it.
* testsuite/18_support/exception_ptr/rethrow_exception.cc: Likewise.
* testsuite/18_support/exception_ptr/lifespan.cc: Likewise.
2008-08-23 Sebastian Redl <sebastian.redl@getdesigned.at>
Add (again) exception propagation support as per N2179. Feature is
available only when _GLIBCXX_ATOMIC_BUILTINS_4 is defined.
* libsupc++/exception_ptr.h (exception_ptr, current_exception,
copy_exception, rethrow_exception): New file, implement exception
propagation.
* libsupc++/eh_ptr.cc (exception_ptr, current_exception,
rethrow_exception, __gxx_dependent_exception_cleanup): Likewise.
* libsupc++/unwind-cxx.h (__cxa_exception): Add reference count.
(__cxa_dependent_exception, __cxa_allocate_dependent_exception,
__cxa_free_dependent_exception, __get_dependent_exception_from_ue,
__GXX_INIT_DEPENDENT_EXCEPTION_CLASS, __is_dependent_exception,
__gxx_dependent_exception_class, __get_object_from_ue,
__get_object_from_ambiguous_exception): Add.
(__GXX_INIT_EXCEPTION_CLASS, __gxx_exception_class): Rename.
(__is_gxx_exception_class): Handle dependent exceptions.
* libsupc++/eh_arm.cc (__cxa_type_match): Likewise.
* libsupc++/eh_call.cc (__cxa_call_unexpected): Likewise.
* libsupc++/eh_personality.cc (__gxx_personality_*): Likewise.
* libsupc++/eh_type.cc (__cxa_current_exception_type): Likewise.
* libsupc++/eh_alloc.cc (__cxa_allocate_dependent_exception,
__cxa_free_dependent_exception): Add.
* libsupc++/eh_throw.cc (__gxx_exception_cleanup): Handle reference
counting.
* libsupc++/exception: Conditionally include exception_ptr.h.
* libsupc++/Makefile.am: Register new files.
* libsupc++/Makefile.in: Regenerate.
* config/abi/pre/gnu.ver: Add new symbols.
* testsuite/18_support/exception_ptr/current_exception.cc: Test the
core functionality of current_exception().
* testsuite/18_support/exception_ptr/rethrow_exception.cc: Test the
core functionality of rethrow_exception().
* testsuite/18_support/exception_ptr/lifespan.cc: Test the life span of
exception objects during exception propagation.
From-SVN: r139509
121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
// -*- C++ -*- Exception handling routines for throwing.
|
|
// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
|
|
// 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)
|
|
{
|
|
// This cleanup is set only for primaries.
|
|
__cxa_exception *header = __get_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->terminateHandler);
|
|
|
|
#ifdef _GLIBCXX_ATOMIC_BUILTINS_4
|
|
if (__sync_sub_and_fetch (&header->referenceCount, 1) == 0)
|
|
{
|
|
#endif
|
|
if (header->exceptionDestructor)
|
|
header->exceptionDestructor (header + 1);
|
|
|
|
__cxa_free_exception (header + 1);
|
|
#ifdef _GLIBCXX_ATOMIC_BUILTINS_4
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
extern "C" void
|
|
__cxxabiv1::__cxa_throw (void *obj, std::type_info *tinfo,
|
|
void (*dest) (void *))
|
|
{
|
|
// Definitely a primary.
|
|
__cxa_exception *header = __get_exception_header_from_obj (obj);
|
|
header->referenceCount = 1;
|
|
header->exceptionType = tinfo;
|
|
header->exceptionDestructor = dest;
|
|
header->unexpectedHandler = __unexpected_handler;
|
|
header->terminateHandler = __terminate_handler;
|
|
__GXX_INIT_PRIMARY_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 ();
|
|
}
|