| // Copyright (C) 2011 The Android Open Source Project |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // 1. Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // 2. Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // 3. Neither the name of the project nor the names of its contributors |
| // may be used to endorse or promote products derived from this software |
| // without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| // SUCH DAMAGE. |
| // |
| // pbase_type_info.cc: Methods for __pbase_type_info. |
| |
| #include "cxxabi_defines.h" |
| #include "typeinfo" |
| |
| #if __cplusplus < 201103L |
| extern "C" std::type_info _ZTIDn; |
| #endif |
| |
| namespace __cxxabiv1 |
| { |
| __pbase_type_info::~__pbase_type_info() |
| { |
| } |
| |
| bool __pbase_type_info::can_catch(const __shim_type_info* thr_type, |
| void*& adjustedPtr) const { |
| if (can_catch_typeinfo_wrapper(thr_type, adjustedPtr, first_time_init)) { |
| return true; |
| } |
| |
| #if __cplusplus >= 201103L |
| // In C++ 11, the type of nullptr is std::nullptr_t, but nullptr can be |
| // casted to every pointer types. Thus, we can return true whenever |
| // the exception object is an instance of std::nullptr_t. |
| return (*thr_type == typeid(decltype(nullptr))); |
| #else |
| return (*thr_type == _ZTIDn); |
| #endif |
| } |
| |
| bool __pbase_type_info::can_catch_typeinfo_wrapper(const __shim_type_info* thr_type, |
| void*& adjustedPtr, |
| unsigned tracker) const { |
| if (*this == *thr_type) { |
| return true; |
| } |
| |
| if (typeid(*this) != typeid(*thr_type)) { |
| return false; |
| } |
| const __pbase_type_info *thrown_type = |
| static_cast<const __pbase_type_info *>(thr_type); |
| |
| // Both side must be the same cv-qualified |
| if (~__flags & thrown_type->__flags) { |
| return false; |
| } |
| |
| // Handle the annoying constness problem |
| // Ref: http://www.parashift.com/c++-faq-lite/constptrptr-conversion.html |
| if (tracker == first_time_init && |
| (tracker & keep_constness) != keep_constness && |
| (tracker & after_gap) != after_gap) { |
| tracker |= keep_constness; |
| } else { |
| tracker &= ~first_time_init; |
| } |
| |
| if ((tracker & first_time_init) != first_time_init && |
| (tracker & after_gap) == after_gap) { |
| return false; |
| } |
| |
| if (!(__flags & __const_mask)) { |
| tracker |= after_gap; |
| } |
| |
| return can_catch_ptr(thrown_type, adjustedPtr, tracker); |
| } |
| |
| bool __pbase_type_info::can_catch_ptr(const __pbase_type_info* thrown_type, |
| void*& adjustedPtr, |
| unsigned tracker) const { |
| bool result; |
| if (do_can_catch_ptr(thrown_type, adjustedPtr, tracker, |
| result)) { |
| return result; |
| } |
| |
| const __pbase_type_info* ptr_pointee = |
| dynamic_cast<const __pbase_type_info*>(__pointee); |
| |
| if (ptr_pointee) { |
| return ptr_pointee->can_catch_typeinfo_wrapper(thrown_type->__pointee, |
| adjustedPtr, |
| tracker); |
| } else { |
| return __pointee->can_catch(thrown_type->__pointee, adjustedPtr); |
| } |
| } |
| } // namespace __cxxabiv1 |