From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libstdc++-v3/libsupc++/eh_ptr.cc | 224 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 libstdc++-v3/libsupc++/eh_ptr.cc (limited to 'libstdc++-v3/libsupc++/eh_ptr.cc') diff --git a/libstdc++-v3/libsupc++/eh_ptr.cc b/libstdc++-v3/libsupc++/eh_ptr.cc new file mode 100644 index 000000000..94c28427d --- /dev/null +++ b/libstdc++-v3/libsupc++/eh_ptr.cc @@ -0,0 +1,224 @@ +// -*- C++ -*- Implement the members of exception_ptr. +// Copyright (C) 2008, 2009, 2010 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 + +#ifdef _GLIBCXX_ATOMIC_BUILTINS_4 + +#define _GLIBCXX_EH_PTR_COMPAT + +#include +#include +#include "unwind-cxx.h" + +using namespace __cxxabiv1; + +std::__exception_ptr::exception_ptr::exception_ptr() throw() +: _M_exception_object(0) { } + + +std::__exception_ptr::exception_ptr::exception_ptr(void* obj) throw() +: _M_exception_object(obj) { _M_addref(); } + + +std::__exception_ptr::exception_ptr::exception_ptr(__safe_bool) throw() +: _M_exception_object(0) { } + + +std::__exception_ptr:: +exception_ptr::exception_ptr(const exception_ptr& other) throw() +: _M_exception_object(other._M_exception_object) +{ _M_addref(); } + + +std::__exception_ptr::exception_ptr::~exception_ptr() throw() +{ _M_release(); } + + +std::__exception_ptr::exception_ptr& +std::__exception_ptr:: +exception_ptr::operator=(const exception_ptr& other) throw() +{ + exception_ptr(other).swap(*this); + return *this; +} + + +void +std::__exception_ptr::exception_ptr::_M_addref() throw() +{ + if (_M_exception_object) + { + __cxa_refcounted_exception *eh = + __get_refcounted_exception_header_from_obj (_M_exception_object); + __sync_add_and_fetch (&eh->referenceCount, 1); + } +} + + +void +std::__exception_ptr::exception_ptr::_M_release() throw() +{ + if (_M_exception_object) + { + __cxa_refcounted_exception *eh = + __get_refcounted_exception_header_from_obj (_M_exception_object); + if (__sync_sub_and_fetch (&eh->referenceCount, 1) == 0) + { + if (eh->exc.exceptionDestructor) + eh->exc.exceptionDestructor (_M_exception_object); + + __cxa_free_exception (_M_exception_object); + _M_exception_object = 0; + } + } +} + + +void* +std::__exception_ptr::exception_ptr::_M_get() const throw() +{ return _M_exception_object; } + + +void +std::__exception_ptr::exception_ptr::swap(exception_ptr &other) throw() +{ + void *tmp = _M_exception_object; + _M_exception_object = other._M_exception_object; + other._M_exception_object = tmp; +} + + +// Retained for compatibility with CXXABI_1.3. +void +std::__exception_ptr::exception_ptr::_M_safe_bool_dummy() throw () { } + + +// Retained for compatibility with CXXABI_1.3. +bool +std::__exception_ptr::exception_ptr::operator!() const throw() +{ return _M_exception_object == 0; } + + +// Retained for compatibility with CXXABI_1.3. +std::__exception_ptr::exception_ptr::operator __safe_bool() const throw() +{ + return _M_exception_object ? &exception_ptr::_M_safe_bool_dummy : 0; +} + + +const std::type_info* +std::__exception_ptr::exception_ptr::__cxa_exception_type() const throw() +{ + __cxa_exception *eh = __get_exception_header_from_obj (_M_exception_object); + return eh->exceptionType; +} + + +bool std::__exception_ptr::operator==(const exception_ptr& lhs, + const exception_ptr& rhs) throw() +{ return lhs._M_exception_object == rhs._M_exception_object; } + + +bool std::__exception_ptr::operator!=(const exception_ptr& lhs, + const exception_ptr& rhs) throw() +{ return !(lhs == rhs);} + + +std::exception_ptr +std::current_exception() throw() +{ + __cxa_eh_globals *globals = __cxa_get_globals (); + __cxa_exception *header = globals->caughtExceptions; + + if (!header) + return std::exception_ptr(); + + // Since foreign exceptions can't be counted, we can't return them. + if (!__is_gxx_exception_class (header->unwindHeader.exception_class)) + return std::exception_ptr(); + + return std::exception_ptr( + __get_object_from_ambiguous_exception (header)); +} + + +static void +__gxx_dependent_exception_cleanup(_Unwind_Reason_Code code, + _Unwind_Exception *exc) +{ + // This cleanup is set only for dependents. + __cxa_dependent_exception *dep = __get_dependent_exception_from_ue (exc); + __cxa_refcounted_exception *header = + __get_refcounted_exception_header_from_obj (dep->primaryException); + + // 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); + + __cxa_free_dependent_exception (dep); + + if (__sync_sub_and_fetch (&header->referenceCount, 1) == 0) + { + if (header->exc.exceptionDestructor) + header->exc.exceptionDestructor (header + 1); + + __cxa_free_exception (header + 1); + } +} + + +void +std::rethrow_exception(std::exception_ptr ep) +{ + void *obj = ep._M_get(); + __cxa_refcounted_exception *eh + = __get_refcounted_exception_header_from_obj (obj); + + __cxa_dependent_exception *dep = __cxa_allocate_dependent_exception (); + dep->primaryException = obj; + __sync_add_and_fetch (&eh->referenceCount, 1); + + dep->unexpectedHandler = __unexpected_handler; + dep->terminateHandler = __terminate_handler; + __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(dep->unwindHeader.exception_class); + dep->unwindHeader.exception_cleanup = __gxx_dependent_exception_cleanup; + +#ifdef _GLIBCXX_SJLJ_EXCEPTIONS + _Unwind_SjLj_RaiseException (&dep->unwindHeader); +#else + _Unwind_RaiseException (&dep->unwindHeader); +#endif + + // Some sort of unwinding error. Note that terminate is a handler. + __cxa_begin_catch (&dep->unwindHeader); + std::terminate(); +} + +#undef _GLIBCXX_EH_PTR_COMPAT + +#endif -- cgit v1.2.3