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// Copyright (C) 1994-2022 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);
}
}
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