diff options
author | paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-08-14 01:17:09 +0000 |
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committer | paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-08-14 01:17:09 +0000 |
commit | a9335e3657a66bb033a376dfec164730f221d770 (patch) | |
tree | 19f7ce6744aac513f00fbcecbb637546b8901b38 | |
parent | a9c45d56cda075d4136d82b1603cf02a6dafdfe0 (diff) | |
download | gcc-a9335e3657a66bb033a376dfec164730f221d770.tar.gz |
2008-08-13 Paolo Carlini <paolo.carlini@oracle.com>
Re-instate last patch, amended to use __exchange_and_add_dispatch
and __atomic_add_dispatch in eh_ptr.cc and eh_throw.cc.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@139091 138bc75d-0d04-0410-961f-82ee72b054a4
-rw-r--r-- | libstdc++-v3/ChangeLog | 5 | ||||
-rw-r--r-- | libstdc++-v3/config/abi/pre/gnu.ver | 29 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/Makefile.am | 3 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/Makefile.in | 9 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_alloc.cc | 68 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_arm.cc | 8 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_call.cc | 4 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_personality.cc | 22 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_ptr.cc | 236 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_throw.cc | 21 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/eh_type.cc | 12 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/exception | 7 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/exception_ptr.h | 169 | ||||
-rw-r--r-- | libstdc++-v3/libsupc++/unwind-cxx.h | 143 | ||||
-rw-r--r-- | libstdc++-v3/testsuite/18_support/exception_ptr/current_exception.cc | 90 | ||||
-rw-r--r-- | libstdc++-v3/testsuite/18_support/exception_ptr/lifespan.cc | 188 | ||||
-rw-r--r-- | libstdc++-v3/testsuite/18_support/exception_ptr/rethrow_exception.cc | 113 |
17 files changed, 1084 insertions, 43 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 2edf9f9d2ea..11269e69388 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,5 +1,10 @@ 2008-08-13 Paolo Carlini <paolo.carlini@oracle.com> + Re-instate last patch, amended to use __exchange_and_add_dispatch + and __atomic_add_dispatch in eh_ptr.cc and eh_throw.cc. + +2008-08-13 Paolo Carlini <paolo.carlini@oracle.com> + Revert the last patch. 2008-08-13 Sebastian Redl <sebastian.redl@getdesigned.at> diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver index 7b31a1cfa47..0ec4879ffd4 100644 --- a/libstdc++-v3/config/abi/pre/gnu.ver +++ b/libstdc++-v3/config/abi/pre/gnu.ver @@ -66,7 +66,9 @@ GLIBCXX_3.4 { # std::condition_variable; std::co[^n]*; std::c[p-s]*; - std::c[u-z]*; + std::cu[^r]*; +# std::current_exception + std::c[v-z]*; # std::[d-g]*; std::d[a-d]*; std::d[f-z]*; @@ -112,10 +114,13 @@ GLIBCXX_3.4 { std::n[^au]*; std::nu[^m]*; std::num[^e]*; - std::[p-r]*; std::ostrstream*; std::out_of_range*; std::overflow_error*; + std::[p-q]*; + std::r[^e]*; + std::re[^t]*; +# std::rethrow_exception std::set_new_handler*; std::set_terminate*; std::set_unexpected*; @@ -1047,4 +1052,24 @@ CXXABI_1.3.3 { _ZTIPu8char32_t; _ZTIPKu8char32_t; + # exception_ptr + _ZNSt15__exception_ptr13exception_ptrC1Ev; + _ZNSt15__exception_ptr13exception_ptrC2Ev; + _ZNSt15__exception_ptr13exception_ptrC1ERKS0_; + _ZNSt15__exception_ptr13exception_ptrC2ERKS0_; + _ZNSt15__exception_ptr13exception_ptrC1EMS0_FvvE; + _ZNSt15__exception_ptr13exception_ptrC2EMS0_FvvE; + _ZNSt15__exception_ptr13exception_ptrD1Ev; + _ZNSt15__exception_ptr13exception_ptrD2Ev; + _ZNSt15__exception_ptr13exception_ptraSERKS0_; + _ZNKSt15__exception_ptr13exception_ptrcvMS0_FvvEEv; + _ZNKSt15__exception_ptr13exception_ptrntEv; + _ZNKSt15__exception_ptr13exception_ptr20__cxa_exception_typeEv; + _ZNSt15__exception_ptr13exception_ptr4swapERS0_; + _ZNSt15__exception_ptreqERKNS_13exception_ptrES2_; + _ZNSt15__exception_ptrneERKNS_13exception_ptrES2_; + + _ZSt17current_exceptionv; + _ZSt17rethrow_exceptionNSt15__exception_ptr13exception_ptrE; + } CXXABI_1.3.2; diff --git a/libstdc++-v3/libsupc++/Makefile.am b/libstdc++-v3/libsupc++/Makefile.am index c0412f0b8ed..680005fbf83 100644 --- a/libstdc++-v3/libsupc++/Makefile.am +++ b/libstdc++-v3/libsupc++/Makefile.am @@ -34,7 +34,7 @@ noinst_LTLIBRARIES = libsupc++convenience.la headers = \ exception new typeinfo cxxabi.h cxxabi-forced.h exception_defines.h \ - initializer_list + initializer_list exception_ptr.h if GLIBCXX_HOSTED c_sources = \ @@ -60,6 +60,7 @@ sources = \ eh_exception.cc \ eh_globals.cc \ eh_personality.cc \ + eh_ptr.cc \ eh_term_handler.cc \ eh_terminate.cc \ eh_throw.cc \ diff --git a/libstdc++-v3/libsupc++/Makefile.in b/libstdc++-v3/libsupc++/Makefile.in index 105aec63d8d..c3d1c6c6b43 100644 --- a/libstdc++-v3/libsupc++/Makefile.in +++ b/libstdc++-v3/libsupc++/Makefile.in @@ -79,7 +79,7 @@ am__libsupc___la_SOURCES_DIST = array_type_info.cc atexit_arm.cc \ bad_cast.cc bad_typeid.cc class_type_info.cc del_op.cc \ del_opnt.cc del_opv.cc del_opvnt.cc dyncast.cc eh_alloc.cc \ eh_arm.cc eh_aux_runtime.cc eh_call.cc eh_catch.cc \ - eh_exception.cc eh_globals.cc eh_personality.cc \ + eh_exception.cc eh_globals.cc eh_personality.cc eh_ptr.cc \ eh_term_handler.cc eh_terminate.cc eh_throw.cc eh_type.cc \ eh_unex_handler.cc enum_type_info.cc function_type_info.cc \ fundamental_type_info.cc guard.cc new_handler.cc new_op.cc \ @@ -91,7 +91,7 @@ am__objects_1 = array_type_info.lo atexit_arm.lo bad_cast.lo \ bad_typeid.lo class_type_info.lo del_op.lo del_opnt.lo \ del_opv.lo del_opvnt.lo dyncast.lo eh_alloc.lo eh_arm.lo \ eh_aux_runtime.lo eh_call.lo eh_catch.lo eh_exception.lo \ - eh_globals.lo eh_personality.lo eh_term_handler.lo \ + eh_globals.lo eh_personality.lo eh_ptr.lo eh_term_handler.lo \ eh_terminate.lo eh_throw.lo eh_type.lo eh_unex_handler.lo \ enum_type_info.lo function_type_info.lo \ fundamental_type_info.lo guard.lo new_handler.lo new_op.lo \ @@ -107,7 +107,7 @@ am__libsupc__convenience_la_SOURCES_DIST = array_type_info.cc \ atexit_arm.cc bad_cast.cc bad_typeid.cc class_type_info.cc \ del_op.cc del_opnt.cc del_opv.cc del_opvnt.cc dyncast.cc \ eh_alloc.cc eh_arm.cc eh_aux_runtime.cc eh_call.cc eh_catch.cc \ - eh_exception.cc eh_globals.cc eh_personality.cc \ + eh_exception.cc eh_globals.cc eh_personality.cc eh_ptr.cc \ eh_term_handler.cc eh_terminate.cc eh_throw.cc eh_type.cc \ eh_unex_handler.cc enum_type_info.cc function_type_info.cc \ fundamental_type_info.cc guard.cc new_handler.cc new_op.cc \ @@ -356,7 +356,7 @@ toolexeclib_LTLIBRARIES = libsupc++.la noinst_LTLIBRARIES = libsupc++convenience.la headers = \ exception new typeinfo cxxabi.h cxxabi-forced.h exception_defines.h \ - initializer_list + initializer_list exception_ptr.h @GLIBCXX_HOSTED_TRUE@c_sources = \ @GLIBCXX_HOSTED_TRUE@ cp-demangle.c @@ -380,6 +380,7 @@ sources = \ eh_exception.cc \ eh_globals.cc \ eh_personality.cc \ + eh_ptr.cc \ eh_term_handler.cc \ eh_terminate.cc \ eh_throw.cc \ diff --git a/libstdc++-v3/libsupc++/eh_alloc.cc b/libstdc++-v3/libsupc++/eh_alloc.cc index 553c1c1e858..6bc46fc9a91 100644 --- a/libstdc++-v3/libsupc++/eh_alloc.cc +++ b/libstdc++-v3/libsupc++/eh_alloc.cc @@ -1,5 +1,5 @@ // -*- C++ -*- Allocate exception objects. -// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 +// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2008 // Free Software Foundation, Inc. // // This file is part of GCC. @@ -89,6 +89,9 @@ typedef char one_buffer[EMERGENCY_OBJ_SIZE] __attribute__((aligned)); static one_buffer emergency_buffer[EMERGENCY_OBJ_COUNT]; static bitmask_type emergency_used; +static __cxa_dependent_exception dependents_buffer[EMERGENCY_OBJ_COUNT]; +static bitmask_type dependents_used; + namespace { // A single mutex controlling emergency allocations. @@ -157,3 +160,66 @@ __cxxabiv1::__cxa_free_exception(void *vptr) throw() else free (ptr - sizeof (__cxa_exception)); } + + +extern "C" __cxa_dependent_exception* +__cxxabiv1::__cxa_allocate_dependent_exception() throw() +{ + __cxa_dependent_exception *ret; + + ret = static_cast<__cxa_dependent_exception*> + (malloc (sizeof (__cxa_dependent_exception))); + + if (!ret) + { + __gnu_cxx::__scoped_lock sentry(emergency_mutex); + + bitmask_type used = dependents_used; + unsigned int which = 0; + + while (used & 1) + { + used >>= 1; + if (++which >= EMERGENCY_OBJ_COUNT) + goto failed; + } + + dependents_used |= (bitmask_type)1 << which; + ret = &dependents_buffer[which]; + + failed:; + + if (!ret) + std::terminate (); + } + + // We have an uncaught exception as soon as we allocate memory. This + // yields uncaught_exception() true during the copy-constructor that + // initializes the exception object. See Issue 475. + __cxa_eh_globals *globals = __cxa_get_globals (); + globals->uncaughtExceptions += 1; + + memset (ret, 0, sizeof (__cxa_dependent_exception)); + + return ret; +} + + +extern "C" void +__cxxabiv1::__cxa_free_dependent_exception + (__cxa_dependent_exception *vptr) throw() +{ + char *base = (char *) dependents_buffer; + char *ptr = (char *) vptr; + if (ptr >= base + && ptr < base + sizeof (dependents_buffer)) + { + const unsigned int which + = (unsigned) (ptr - base) / sizeof (__cxa_dependent_exception); + + __gnu_cxx::__scoped_lock sentry(emergency_mutex); + dependents_used &= ~((bitmask_type)1 << which); + } + else + free (vptr); +} diff --git a/libstdc++-v3/libsupc++/eh_arm.cc b/libstdc++-v3/libsupc++/eh_arm.cc index 6f770e95663..f10bb41e5c0 100644 --- a/libstdc++-v3/libsupc++/eh_arm.cc +++ b/libstdc++-v3/libsupc++/eh_arm.cc @@ -1,5 +1,5 @@ // -*- C++ -*- ARM specific Exception handling support routines. -// Copyright (C) 2004, 2005 Free Software Foundation, Inc. +// Copyright (C) 2004, 2005, 2008 Free Software Foundation, Inc. // // This file is part of GCC. // @@ -48,13 +48,19 @@ __cxa_type_match(_Unwind_Exception* ue_header, { bool forced_unwind = __is_gxx_forced_unwind_class(ue_header->exception_class); bool foreign_exception = !forced_unwind && !__is_gxx_exception_class(ue_header->exception_class); + bool dependent_exception = + __is_dependent_exception(ue_header->exception_class); __cxa_exception* xh = __get_exception_header_from_ue(ue_header); + __cxa_dependent_exception *dx = __get_dependent_exception_from_ue(ue_header); const std::type_info* throw_type; if (forced_unwind) throw_type = &typeid(abi::__forced_unwind); else if (foreign_exception) throw_type = &typeid(abi::__foreign_exception); + else if (dependent_exception) + throw_type = __get_exception_header_from_obj + (dx->primaryException)->exceptionType; else throw_type = xh->exceptionType; diff --git a/libstdc++-v3/libsupc++/eh_call.cc b/libstdc++-v3/libsupc++/eh_call.cc index edf62188a6b..c0bced99533 100644 --- a/libstdc++-v3/libsupc++/eh_call.cc +++ b/libstdc++-v3/libsupc++/eh_call.cc @@ -1,5 +1,5 @@ // -*- C++ -*- Helpers for calling unextected and terminate -// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc. +// Copyright (C) 2001, 2002, 2003, 2008 Free Software Foundation, Inc. // // This file is part of GCC. // @@ -125,7 +125,7 @@ __cxa_call_unexpected(void* exc_obj_in) __cxa_eh_globals* globals = __cxa_get_globals_fast(); __cxa_exception* new_xh = globals->caughtExceptions; - void* new_ptr = new_xh + 1; + void* new_ptr = __gxx_get_object_from_ambiguous_exception (new_xh); const std::type_info* catch_type; int n; bool bad_exception_allowed = false; diff --git a/libstdc++-v3/libsupc++/eh_personality.cc b/libstdc++-v3/libsupc++/eh_personality.cc index b7d957c4d37..12b54c16587 100644 --- a/libstdc++-v3/libsupc++/eh_personality.cc +++ b/libstdc++-v3/libsupc++/eh_personality.cc @@ -377,7 +377,7 @@ PERSONALITY_FUNCTION (int version, const unsigned char *p; _Unwind_Ptr landing_pad, ip; int handler_switch_value; - void* thrown_ptr = ue_header + 1; + void* thrown_ptr = 0; bool foreign_exception; int ip_before_insn = 0; @@ -543,30 +543,33 @@ PERSONALITY_FUNCTION (int version, bool saw_handler = false; #ifdef __ARM_EABI_UNWINDER__ + // ??? How does this work - more importantly, how does it interact with + // dependent exceptions? throw_type = ue_header; if (actions & _UA_FORCE_UNWIND) { __GXX_INIT_FORCED_UNWIND_CLASS(ue_header->exception_class); - thrown_ptr = 0; } - else if (foreign_exception) - thrown_ptr = 0; + else if (!foreign_exception) + thrown_ptr = __get_object_from_ue (ue_header); #else // During forced unwinding, match a magic exception type. if (actions & _UA_FORCE_UNWIND) { throw_type = &typeid(abi::__forced_unwind); - thrown_ptr = 0; } // With a foreign exception class, there's no exception type. // ??? What to do about GNU Java and GNU Ada exceptions? else if (foreign_exception) { throw_type = &typeid(abi::__foreign_exception); - thrown_ptr = 0; } else - throw_type = xh->exceptionType; + { + thrown_ptr = __get_object_from_ue (ue_header); + throw_type = __get_exception_header_from_obj + (thrown_ptr)->exceptionType; + } #endif while (1) @@ -758,13 +761,14 @@ __cxa_call_unexpected (void *exc_obj_in) __cxa_eh_globals *globals = __cxa_get_globals_fast (); __cxa_exception *new_xh = globals->caughtExceptions; - void *new_ptr = new_xh + 1; + void *new_ptr = __get_object_from_ambiguous_exception (new_xh); // We don't quite have enough stuff cached; re-parse the LSDA. parse_lsda_header (0, xh_lsda, &info); // If this new exception meets the exception spec, allow it. - if (check_exception_spec (&info, new_xh->exceptionType, + if (check_exception_spec (&info, __get_exception_header_from_obj + (new_ptr)->exceptionType, new_ptr, xh_switch_value)) __throw_exception_again; diff --git a/libstdc++-v3/libsupc++/eh_ptr.cc b/libstdc++-v3/libsupc++/eh_ptr.cc new file mode 100644 index 00000000000..35ba5f90b87 --- /dev/null +++ b/libstdc++-v3/libsupc++/eh_ptr.cc @@ -0,0 +1,236 @@ +// -*- C++ -*- Implement the members of exception_ptr. +// Copyright (C) 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 <exception> +#include <exception_ptr.h> +#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_exception *eh = + __get_exception_header_from_obj (_M_exception_object); + __gnu_cxx::__atomic_add_dispatch (&eh->referenceCount, 1); + } +} + + +void +std::__exception_ptr::exception_ptr::_M_release() throw() +{ + if (_M_exception_object) + { + __cxa_exception *eh = + __get_exception_header_from_obj (_M_exception_object); + if (__gnu_cxx::__exchange_and_add_dispatch (&eh->referenceCount, -1) == 0) + { + if (eh->exceptionDestructor) + eh->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::_M_safe_bool_dummy() +{ +} + + +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; +} + + +bool +std::__exception_ptr::exception_ptr::operator!() const throw() +{ + return _M_exception_object == 0; +} + + +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_exception *header = + __get_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->terminateHandler); + + if (__gnu_cxx::__exchange_and_add_dispatch (&header->referenceCount, -1) == 0) + { + if (header->exceptionDestructor) + header->exceptionDestructor (header + 1); + + __cxa_free_exception (header + 1); + } +} + + +void +std::rethrow_exception(std::exception_ptr ep) +{ + void *obj = ep._M_get(); + __cxa_exception *eh = __get_exception_header_from_obj (obj); + + __cxa_dependent_exception *dep = __cxa_allocate_dependent_exception (); + dep->primaryException = obj; + __gnu_cxx::__atomic_add_dispatch (&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 (); +} diff --git a/libstdc++-v3/libsupc++/eh_throw.cc b/libstdc++-v3/libsupc++/eh_throw.cc index b405f8f7c64..198ff181035 100644 --- a/libstdc++-v3/libsupc++/eh_throw.cc +++ b/libstdc++-v3/libsupc++/eh_throw.cc @@ -1,5 +1,5 @@ // -*- C++ -*- Exception handling routines for throwing. -// Copyright (C) 2001, 2003 Free Software Foundation, Inc. +// Copyright (C) 2001, 2003, 2008 Free Software Foundation, Inc. // // This file is part of GCC. // @@ -36,20 +36,23 @@ 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); - // If we haven't been caught by a foreign handler, then this is - // some sort of unwind error. In that case just die immediately. + // 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 + // 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); - if (header->exceptionDestructor) - header->exceptionDestructor (header + 1); + if (__gnu_cxx::__exchange_and_add_dispatch (&header->referenceCount, -1) == 0) + { + if (header->exceptionDestructor) + header->exceptionDestructor (header + 1); - __cxa_free_exception (header + 1); + __cxa_free_exception (header + 1); + } } @@ -57,12 +60,14 @@ 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 = 0; header->exceptionType = tinfo; header->exceptionDestructor = dest; header->unexpectedHandler = __unexpected_handler; header->terminateHandler = __terminate_handler; - __GXX_INIT_EXCEPTION_CLASS(header->unwindHeader.exception_class); + __GXX_INIT_PRIMARY_EXCEPTION_CLASS(header->unwindHeader.exception_class); header->unwindHeader.exception_cleanup = __gxx_exception_cleanup; #ifdef _GLIBCXX_SJLJ_EXCEPTIONS diff --git a/libstdc++-v3/libsupc++/eh_type.cc b/libstdc++-v3/libsupc++/eh_type.cc index 99627efdd97..03432976714 100644 --- a/libstdc++-v3/libsupc++/eh_type.cc +++ b/libstdc++-v3/libsupc++/eh_type.cc @@ -1,5 +1,5 @@ // -*- C++ -*- Exception handling routines for catching. -// Copyright (C) 2001 Free Software Foundation, Inc. +// Copyright (C) 2001, 2008 Free Software Foundation, Inc. // // This file is part of GCC. // @@ -43,7 +43,15 @@ std::type_info *__cxa_current_exception_type () __cxa_eh_globals *globals = __cxa_get_globals (); __cxa_exception *header = globals->caughtExceptions; if (header) - return header->exceptionType; + { + if (__is_dependent_exception (header->unwindHeader.exception_class)) + { + __cxa_dependent_exception *de = + __get_dependent_exception_from_ue (&header->unwindHeader); + header = __get_exception_header_from_obj (de->primaryException); + } + return header->exceptionType; + } else return 0; } diff --git a/libstdc++-v3/libsupc++/exception b/libstdc++-v3/libsupc++/exception index a7e2db78dd1..f1288211e98 100644 --- a/libstdc++-v3/libsupc++/exception +++ b/libstdc++-v3/libsupc++/exception @@ -1,7 +1,7 @@ // Exception Handling support header for -*- C++ -*- // Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, -// 2004, 2005, 2006, 2007 +// 2004, 2005, 2006, 2007, 2008 // Free Software Foundation // // This file is part of GCC. @@ -110,6 +110,7 @@ namespace std * result in a call of @c terminate() (15.5.1)." */ bool uncaught_exception() throw(); + } // namespace std _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) @@ -132,4 +133,8 @@ _GLIBCXX_END_NAMESPACE #pragma GCC visibility pop +#ifdef __GXX_EXPERIMENTAL_CXX0X__ +#include <exception_ptr.h> +#endif + #endif diff --git a/libstdc++-v3/libsupc++/exception_ptr.h b/libstdc++-v3/libsupc++/exception_ptr.h new file mode 100644 index 00000000000..77b0431c42f --- /dev/null +++ b/libstdc++-v3/libsupc++/exception_ptr.h @@ -0,0 +1,169 @@ +// Exception Handling support header (exception_ptr class) for -*- C++ -*- + +// Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, +// 2004, 2005, 2006, 2007, 2008 +// Free Software Foundation +// +// 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. + +/** @file exception_ptr.h + * This is an internal header file, included by other headers and the + * implementation. You should not attempt to use it directly. + */ + +#ifndef __EXCEPTION_PTR_H__ +#define __EXCEPTION_PTR_H__ + +#pragma GCC visibility push(default) + +#include <bits/c++config.h> + +extern "C++" { + +namespace std +{ + // Hide the free operators from other types + namespace __exception_ptr + { + /** + * @brief An opaque pointer to an arbitrary exception. + */ + class exception_ptr; + } + + using __exception_ptr::exception_ptr; + + /** Obtain an %exception_ptr to the currently handled exception. If there + * is none, or the currently handled exception is foreign, return the null + * value. + */ + exception_ptr current_exception() throw(); + + /// Throw the object pointed to by the %exception_ptr. + void rethrow_exception(exception_ptr) __attribute__ ((__noreturn__)); + + /// Obtain an %exception_ptr pointing to a copy of the supplied object. + template <class _Ex> + exception_ptr copy_exception(_Ex __ex) throw(); + + + namespace __exception_ptr + { + bool operator==(const exception_ptr&, + const exception_ptr&) throw(); + bool operator!=(const exception_ptr&, + const exception_ptr&) throw(); + + class exception_ptr + { + void* _M_exception_object; + + explicit exception_ptr(void* __e) throw(); + + void _M_addref() throw(); + void _M_release() throw(); + + void *_M_get() const throw(); + + void _M_safe_bool_dummy(); + + friend exception_ptr std::current_exception() throw(); + friend void std::rethrow_exception(exception_ptr); + + public: + exception_ptr() throw(); + + typedef void (exception_ptr::*__safe_bool)(); + + // For construction from nullptr or 0. + exception_ptr(__safe_bool) throw(); + + exception_ptr(const exception_ptr&) throw(); + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + exception_ptr(exception_ptr&& __o) throw() + : _M_exception_object(__o._M_exception_object) + { + __o._M_exception_object = 0; + } +#endif + + exception_ptr& operator=(const exception_ptr&) throw(); + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + exception_ptr& operator=(exception_ptr&& __o) throw() + { + exception_ptr(__o).swap(*this); + return *this; + } +#endif + + ~exception_ptr() throw(); + + void swap(exception_ptr&) throw(); + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + void swap(exception_ptr &&__o) throw() + { + void *__tmp = _M_exception_object; + _M_exception_object = __o._M_exception_object; + __o._M_exception_object = __tmp; + } +#endif + + bool operator!() const throw(); + operator __safe_bool() const throw(); + + friend bool operator==(const exception_ptr&, + const exception_ptr&) throw(); + + const type_info *__cxa_exception_type() const throw(); + }; + + } // namespace __exception_ptr + + + template <class _Ex> + exception_ptr copy_exception(_Ex __ex) throw() + { + try + { + throw __ex; + } + catch(...) + { + return current_exception (); + } + } + +} // namespace std + +} // extern "C++" + +#pragma GCC visibility pop + +#endif diff --git a/libstdc++-v3/libsupc++/unwind-cxx.h b/libstdc++-v3/libsupc++/unwind-cxx.h index 75874fc5da4..9697498026d 100644 --- a/libstdc++-v3/libsupc++/unwind-cxx.h +++ b/libstdc++-v3/libsupc++/unwind-cxx.h @@ -1,5 +1,5 @@ // -*- C++ -*- Exception handling and frame unwind runtime interface routines. -// Copyright (C) 2001 Free Software Foundation, Inc. +// Copyright (C) 2001, 2008 Free Software Foundation, Inc. // // This file is part of GCC. // @@ -39,18 +39,22 @@ #include <exception> #include <cstddef> #include "unwind.h" +#include <ext/atomicity.h> #pragma GCC visibility push(default) namespace __cxxabiv1 { -// A C++ exception object consists of a header, which is a wrapper around -// an unwind object header with additional C++ specific information, +// A primary C++ exception object consists of a header, which is a wrapper +// around an unwind object header with additional C++ specific information, // followed by the exception object itself. struct __cxa_exception -{ +{ + // Manage this header. + _Atomic_word referenceCount; + // Manage the exception object itself. std::type_info *exceptionType; void (*exceptionDestructor)(void *); @@ -87,6 +91,47 @@ struct __cxa_exception _Unwind_Exception unwindHeader; }; +// A dependent C++ exception object consists of a wrapper around an unwind +// object header with additional C++ specific information, containing a pointer +// to a primary exception object. + +struct __cxa_dependent_exception +{ + // The primary exception this thing depends on. + void *primaryException; + + // The C++ standard has entertaining rules wrt calling set_terminate + // and set_unexpected in the middle of the exception cleanup process. + std::unexpected_handler unexpectedHandler; + std::terminate_handler terminateHandler; + + // The caught exception stack threads through here. + __cxa_exception *nextException; + + // How many nested handlers have caught this exception. A negated + // value is a signal that this object has been rethrown. + int handlerCount; + +#ifdef __ARM_EABI_UNWINDER__ + // Stack of exceptions in cleanups. + __cxa_exception* nextPropagatingException; + + // The nuber of active cleanup handlers for this exception. + int propagationCount; +#else + // Cache parsed handler data from the personality routine Phase 1 + // for Phase 2 and __cxa_call_unexpected. + int handlerSwitchValue; + const unsigned char *actionRecord; + const unsigned char *languageSpecificData; + _Unwind_Ptr catchTemp; + void *adjustedPtr; +#endif + + // The generic exception header. Must be last. + _Unwind_Exception unwindHeader; +}; + // Each thread in a C++ program has access to a __cxa_eh_globals object. struct __cxa_eh_globals { @@ -105,12 +150,20 @@ struct __cxa_eh_globals extern "C" __cxa_eh_globals *__cxa_get_globals () throw(); extern "C" __cxa_eh_globals *__cxa_get_globals_fast () throw(); -// Allocate memory for the exception plus the thown object. +// Allocate memory for the primary exception plus the thrown object. extern "C" void *__cxa_allocate_exception(std::size_t thrown_size) throw(); -// Free the space allocated for the exception. +// Free the space allocated for the primary exception. extern "C" void __cxa_free_exception(void *thrown_exception) throw(); +// Allocate memory for a dependent exception. +extern "C" __cxa_dependent_exception* +__cxa_allocate_dependent_exception() throw(); + +// Free the space allocated for the dependent exception. +extern "C" void +__cxa_free_dependent_exception(__cxa_dependent_exception *ex) throw(); + // Throw the exception. extern "C" void __cxa_throw (void *thrown_exception, std::type_info *tinfo, @@ -173,6 +226,12 @@ __get_exception_header_from_ue (_Unwind_Exception *exc) return reinterpret_cast<__cxa_exception *>(exc + 1) - 1; } +static inline __cxa_dependent_exception * +__get_dependent_exception_from_ue (_Unwind_Exception *exc) +{ + return reinterpret_cast<__cxa_dependent_exception *>(exc + 1) - 1; +} + #ifdef __ARM_EABI_UNWINDER__ static inline bool __is_gxx_exception_class(_Unwind_Exception_Class c) @@ -185,11 +244,19 @@ __is_gxx_exception_class(_Unwind_Exception_Class c) && c[4] == 'C' && c[5] == '+' && c[6] == '+' - && c[7] == '\0'; + && (c[7] == '\0' || c[7] == '\x01'); +} + +// Only checks for primary or dependent, but not that it is a C++ exception at +// all. +static inline bool +__is_dependent_exception(_Unwind_Exception_Class c) +{ + return c[7] == '\x01'; } static inline void -__GXX_INIT_EXCEPTION_CLASS(_Unwind_Exception_Class c) +__GXX_INIT_PRIMARY_EXCEPTION_CLASS(_Unwind_Exception_Class c) { c[0] = 'G'; c[1] = 'N'; @@ -201,6 +268,19 @@ __GXX_INIT_EXCEPTION_CLASS(_Unwind_Exception_Class c) c[7] = '\0'; } +static inline void +__GXX_INIT_DEPENDENT_EXCEPTION_CLASS(_Unwind_Exception_Class c) +{ + c[0] = 'G'; + c[1] = 'N'; + c[2] = 'U'; + c[3] = 'C'; + c[4] = 'C'; + c[5] = '+'; + c[6] = '+'; + c[7] = '\x01'; +} + static inline bool __is_gxx_forced_unwind_class(_Unwind_Exception_Class c) { @@ -233,8 +313,8 @@ __gxx_caught_object(_Unwind_Exception* eo) return (void*)eo->barrier_cache.bitpattern[0]; } #else // !__ARM_EABI_UNWINDER__ -// This is the exception class we report -- "GNUCC++\0". -const _Unwind_Exception_Class __gxx_exception_class +// This is the primary exception class we report -- "GNUCC++\0". +const _Unwind_Exception_Class __gxx_primary_exception_class = ((((((((_Unwind_Exception_Class) 'G' << 8 | (_Unwind_Exception_Class) 'N') << 8 | (_Unwind_Exception_Class) 'U') @@ -244,13 +324,36 @@ const _Unwind_Exception_Class __gxx_exception_class << 8 | (_Unwind_Exception_Class) '+') << 8 | (_Unwind_Exception_Class) '\0'); +// This is the dependent (from std::rethrow_exception) exception class we report +// "GNUCC++\x01" +const _Unwind_Exception_Class __gxx_dependent_exception_class += ((((((((_Unwind_Exception_Class) 'G' + << 8 | (_Unwind_Exception_Class) 'N') + << 8 | (_Unwind_Exception_Class) 'U') + << 8 | (_Unwind_Exception_Class) 'C') + << 8 | (_Unwind_Exception_Class) 'C') + << 8 | (_Unwind_Exception_Class) '+') + << 8 | (_Unwind_Exception_Class) '+') + << 8 | (_Unwind_Exception_Class) '\x01'); + static inline bool __is_gxx_exception_class(_Unwind_Exception_Class c) { - return c == __gxx_exception_class; + return c == __gxx_primary_exception_class + || c == __gxx_dependent_exception_class; } -#define __GXX_INIT_EXCEPTION_CLASS(c) c = __gxx_exception_class +// Only checks for primary or dependent, but not that it is a C++ exception at +// all. +static inline bool +__is_dependent_exception(_Unwind_Exception_Class c) +{ + return (c & 1); +} + +#define __GXX_INIT_PRIMARY_EXCEPTION_CLASS(c) c = __gxx_primary_exception_class +#define __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(c) \ + c = __gxx_dependent_exception_class // GNU C++ personality routine, Version 0. extern "C" _Unwind_Reason_Code __gxx_personality_v0 @@ -265,11 +368,27 @@ extern "C" _Unwind_Reason_Code __gxx_personality_sj0 static inline void* __gxx_caught_object(_Unwind_Exception* eo) { + // Bad as it looks, this actually works for dependent exceptions too. __cxa_exception* header = __get_exception_header_from_ue (eo); return header->adjustedPtr; } #endif // !__ARM_EABI_UNWINDER__ +static inline void* +__get_object_from_ue(_Unwind_Exception* eo) throw() +{ + return __is_dependent_exception (eo->exception_class) ? + __get_dependent_exception_from_ue (eo)->primaryException : + eo + 1; +} + +static inline void * +__get_object_from_ambiguous_exception(__cxa_exception *p_or_d) throw() +{ + return __get_object_from_ue (&p_or_d->unwindHeader); +} + + } /* namespace __cxxabiv1 */ #pragma GCC visibility pop diff --git a/libstdc++-v3/testsuite/18_support/exception_ptr/current_exception.cc b/libstdc++-v3/testsuite/18_support/exception_ptr/current_exception.cc new file mode 100644 index 00000000000..d4a63e4b001 --- /dev/null +++ b/libstdc++-v3/testsuite/18_support/exception_ptr/current_exception.cc @@ -0,0 +1,90 @@ +// { dg-options "-std=gnu++0x" } +// 2008-05-25 Sebastian Redl <sebastian.redl@getdesigned.at> + +// Copyright (C) 2008 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library 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. + +// This library 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 this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// current_exception() under various conditions. + +#include <exception> +#include <testsuite_hooks.h> + +void test01() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + exception_ptr ep = current_exception(); + VERIFY( !ep ); +} + +void test02() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + try { + throw 0; + } catch(...) { + exception_ptr ep = current_exception(); + VERIFY( ep ); + } +} + +void test03() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + try { + throw exception(); + } catch(std::exception&) { + exception_ptr ep = current_exception(); + VERIFY( ep ); + } +} + +void test04() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + try { + throw 0; + } catch(...) { + exception_ptr ep1 = current_exception(); + try { + throw 0; + } catch(...) { + exception_ptr ep2 = current_exception(); + VERIFY( ep1 != ep2 ); + } + exception_ptr ep3 = current_exception(); + // Not guaranteed by standard, but by this implementation. + VERIFY( ep1 == ep3 ); + } +} + +int main() +{ + test01(); + test02(); + test03(); + test04(); + return 0; +} diff --git a/libstdc++-v3/testsuite/18_support/exception_ptr/lifespan.cc b/libstdc++-v3/testsuite/18_support/exception_ptr/lifespan.cc new file mode 100644 index 00000000000..1107a2ece60 --- /dev/null +++ b/libstdc++-v3/testsuite/18_support/exception_ptr/lifespan.cc @@ -0,0 +1,188 @@ +// { dg-options "-std=gnu++0x" } +// 2008-05-25 Sebastian Redl <sebastian.redl@getdesigned.at> + +// Copyright (C) 2008 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library 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. + +// This library 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 this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// Tests the life span of the exception object. + +#include <exception> +#include <testsuite_hooks.h> + +bool may_destruct = false; + +class destructing +{ + mutable bool copied; + +public: + destructing() : copied(false) { } + destructing(const destructing &o) : copied(false) { o.copied = true; } + ~destructing() { VERIFY( copied || may_destruct ); } +}; + +void test01() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + // Test the destructing class. + { + destructing *d = new destructing; + destructing d2(*d); + delete d; + may_destruct = true; + } + may_destruct = false; +} + +void test02() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + try { + throw destructing(); + } catch(...) { + may_destruct = true; + } + may_destruct = false; +} + +void test03() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + try { + throw destructing(); + } catch(...) { + { + exception_ptr ep = current_exception(); + } + may_destruct = true; + } + may_destruct = false; +} + +void test04() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + { + exception_ptr ep; + try { + throw destructing(); + } catch(...) { + ep = current_exception(); + } + may_destruct = true; + } + may_destruct = false; +} + +void test05_helper() +{ + using namespace std; + try { + throw destructing(); + } catch(...) { + exception_ptr ep = current_exception(); + rethrow_exception(ep); + } +} + +void test05() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + try { + test05_helper(); + } catch(...) { + may_destruct = true; + } + may_destruct = false; +} + +void test06_helper() +{ + using namespace std; + try { + throw destructing(); + } catch(...) { + exception_ptr ep = current_exception(); + throw; + } +} + +void test06() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + try { + test06_helper(); + } catch(...) { + may_destruct = true; + } + may_destruct = false; +} + +std::exception_ptr gep; + +void test99() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + may_destruct = false; + + try { + throw destructing(); + } catch(...) { + gep = current_exception(); + } +} + +int main() +{ + test01(); + test02(); + test03(); + test04(); + test05(); + test06(); + + test99(); + may_destruct = true; + return 0; +} diff --git a/libstdc++-v3/testsuite/18_support/exception_ptr/rethrow_exception.cc b/libstdc++-v3/testsuite/18_support/exception_ptr/rethrow_exception.cc new file mode 100644 index 00000000000..96d38d5eba3 --- /dev/null +++ b/libstdc++-v3/testsuite/18_support/exception_ptr/rethrow_exception.cc @@ -0,0 +1,113 @@ +// { dg-options "-std=gnu++0x" } +// 2008-05-25 Sebastian Redl <sebastian.redl@getdesigned.at> + +// Copyright (C) 2008 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library 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. + +// This library 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 this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// rethrow_exception() and preservation of data + +#include <exception> +#include <typeinfo> +#include <cstring> +#include <stdexcept> +#include <testsuite_hooks.h> + +void test01() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + try { + rethrow_exception(copy_exception(0)); + } catch(...) { + } +} + +void test02() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + try { + rethrow_exception(copy_exception(runtime_error("test"))); + } catch(exception &e) { + VERIFY( typeid(e) == typeid(runtime_error) ); + VERIFY( strcmp(e.what(), "test") == 0 ); + } +} + +void test03() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + exception_ptr ep; + try { + throw 0; + } catch(...) { + ep = current_exception(); + } + try { + rethrow_exception(ep); + } catch(...) { + } +} + +void test04() +{ + bool test __attribute__((unused)) = true; + using namespace std; + + // Weave the exceptions in an attempt to confuse the machinery. + try { + throw 0; + } catch(...) { + exception_ptr ep1 = current_exception(); + try { + throw 1; + } catch(...) { + exception_ptr ep2 = current_exception(); + try { + rethrow_exception(ep1); + } catch(...) { + try { + rethrow_exception(ep2); + } catch(...) { + try { + rethrow_exception(ep1); + } catch(...) { + } + try { + rethrow_exception(ep2); + } catch(...) { + } + } + } + } + } +} + +int main() +{ + test01(); + test02(); + test03(); + test04(); + + return 0; +} |