Mercurial > hg > CbC > CbC_gcc
view libstdc++-v3/libsupc++/pbase_type_info.cc @ 144:8f4e72ab4e11
fix segmentation fault caused by nothing next cur_op to end
author | Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 23 Dec 2018 21:23:56 +0900 |
parents | 84e7813d76e9 |
children | 1830386684a0 |
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// Copyright (C) 1994-2018 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 // <http://www.gnu.org/licenses/>. #include "tinfo.h" namespace __cxxabiv1 { __pbase_type_info:: ~__pbase_type_info () {} bool __pbase_type_info:: __do_catch (const type_info *thr_type, void **thr_obj, unsigned outer) const { if (*this == *thr_type) return true; // same type #if __cpp_rtti if (*thr_type == typeid (nullptr)) { // A catch handler for any pointer type matches nullptr_t. if (typeid (*this) == typeid(__pointer_type_info)) { *thr_obj = nullptr; return true; } else if (typeid (*this) == typeid(__pointer_to_member_type_info)) { if (__pointee->__is_function_p ()) { using pmf_type = void (__pbase_type_info::*)(); static const pmf_type pmf = nullptr; *thr_obj = const_cast<pmf_type*>(&pmf); return true; } else { using pm_type = int __pbase_type_info::*; static const pm_type pm = nullptr; *thr_obj = const_cast<pm_type*>(&pm); return true; } } } if (typeid (*this) != typeid (*thr_type)) return false; // not both same kind of pointers #endif if (!(outer & 1)) // We're not the same and our outer pointers are not all const qualified // Therefore there must at least be a qualification conversion involved // But for that to be valid, our outer pointers must be const qualified. return false; const __pbase_type_info *thrown_type = static_cast <const __pbase_type_info *> (thr_type); unsigned tflags = thrown_type->__flags; const unsigned fqual_mask = __transaction_safe_mask|__noexcept_mask; unsigned throw_fqual = (tflags & fqual_mask); unsigned catch_fqual = (__flags & fqual_mask); if (throw_fqual & ~catch_fqual) /* Catch can perform a function pointer conversion. */ tflags &= catch_fqual; if (catch_fqual & ~throw_fqual) /* But not the reverse. */ return false; if (tflags & ~__flags) // We're less qualified. return false; if (!(__flags & __const_mask)) outer &= ~1; return __pointer_catch (thrown_type, thr_obj, outer); } }