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338 lines
8.0 KiB
C++
338 lines
8.0 KiB
C++
// New abi Support -*- C++ -*-
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// Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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//
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// This file is part of GNU CC.
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//
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// GNU CC is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// GNU CC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with GNU CC; see the file COPYING. If not, write to
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// the Free Software Foundation, 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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// Written by Nathan Sidwell, Codesourcery LLC, <nathan@codesourcery.com>
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#include <cxxabi.h>
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#include <new>
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#include <exception>
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#include <exception_defines.h>
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#include "unwind-cxx.h"
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namespace __cxxabiv1
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{
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namespace
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{
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struct uncatch_exception
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{
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uncatch_exception ();
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~uncatch_exception () { __cxa_begin_catch (&p->unwindHeader); }
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__cxa_exception *p;
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};
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uncatch_exception::uncatch_exception ()
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{
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__cxa_eh_globals *globals = __cxa_get_globals_fast ();
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p = globals->caughtExceptions;
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p->handlerCount -= 1;
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globals->caughtExceptions = p->nextException;
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globals->uncaughtExceptions += 1;
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}
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}
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// Allocate and construct array.
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extern "C" void *
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__cxa_vec_new(std::size_t element_count,
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std::size_t element_size,
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std::size_t padding_size,
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void (*constructor) (void *),
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void (*destructor) (void *))
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{
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return __cxa_vec_new2(element_count, element_size, padding_size,
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constructor, destructor,
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&operator new[], &operator delete []);
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}
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extern "C" void *
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__cxa_vec_new2(std::size_t element_count,
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std::size_t element_size,
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std::size_t padding_size,
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void (*constructor) (void *),
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void (*destructor) (void *),
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void *(*alloc) (std::size_t),
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void (*dealloc) (void *))
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{
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std::size_t size = element_count * element_size + padding_size;
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char *base = static_cast <char *> (alloc (size));
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if (padding_size)
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{
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base += padding_size;
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reinterpret_cast <std::size_t *> (base)[-1] = element_count;
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}
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try
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{
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__cxa_vec_ctor(base, element_count, element_size,
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constructor, destructor);
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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dealloc(base - padding_size);
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}
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__throw_exception_again;
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}
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return base;
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}
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extern "C" void *
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__cxa_vec_new3(std::size_t element_count,
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std::size_t element_size,
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std::size_t padding_size,
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void (*constructor) (void *),
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void (*destructor) (void *),
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void *(*alloc) (std::size_t),
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void (*dealloc) (void *, std::size_t))
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{
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std::size_t size = element_count * element_size + padding_size;
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char *base = static_cast<char *>(alloc (size));
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if (padding_size)
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{
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base += padding_size;
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reinterpret_cast<std::size_t *>(base)[-1] = element_count;
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}
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try
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{
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__cxa_vec_ctor(base, element_count, element_size,
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constructor, destructor);
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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dealloc(base - padding_size, size);
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}
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__throw_exception_again;
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}
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return base;
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}
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// Construct array.
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extern "C" void
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__cxa_vec_ctor(void *array_address,
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std::size_t element_count,
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std::size_t element_size,
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void (*constructor) (void *),
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void (*destructor) (void *))
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{
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std::size_t ix = 0;
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char *ptr = static_cast<char *>(array_address);
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try
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{
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if (constructor)
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for (; ix != element_count; ix++, ptr += element_size)
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constructor(ptr);
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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__cxa_vec_cleanup(array_address, ix, element_size, destructor);
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}
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__throw_exception_again;
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}
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}
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// Construct an array by copying.
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extern "C" void
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__cxa_vec_cctor(void *dest_array,
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void *src_array,
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std::size_t element_count,
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std::size_t element_size,
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void (*constructor) (void *, void *),
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void (*destructor) (void *))
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{
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std::size_t ix = 0;
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char *dest_ptr = static_cast<char *>(dest_array);
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char *src_ptr = static_cast<char *>(src_array);
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try
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{
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if (constructor)
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for (; ix != element_count;
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ix++, src_ptr += element_size, dest_ptr += element_size)
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constructor(dest_ptr, src_ptr);
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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__cxa_vec_cleanup(dest_array, ix, element_size, destructor);
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}
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__throw_exception_again;
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}
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}
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// Destruct array.
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extern "C" void
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__cxa_vec_dtor(void *array_address,
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std::size_t element_count,
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std::size_t element_size,
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void (*destructor) (void *))
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{
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if (destructor)
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{
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char *ptr = static_cast<char *>(array_address);
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std::size_t ix = element_count;
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ptr += element_count * element_size;
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try
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{
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while (ix--)
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{
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ptr -= element_size;
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destructor(ptr);
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}
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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__cxa_vec_cleanup(array_address, ix, element_size, destructor);
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}
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__throw_exception_again;
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}
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}
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}
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// Destruct array as a result of throwing an exception.
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// [except.ctor]/3 If a destructor called during stack unwinding
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// exits with an exception, terminate is called.
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extern "C" void
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__cxa_vec_cleanup(void *array_address,
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std::size_t element_count,
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std::size_t element_size,
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void (*destructor) (void *))
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{
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if (destructor)
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{
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char *ptr = static_cast <char *> (array_address);
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std::size_t ix = element_count;
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ptr += element_count * element_size;
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try
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{
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while (ix--)
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{
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ptr -= element_size;
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destructor(ptr);
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}
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}
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catch (...)
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{
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std::terminate();
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}
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}
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}
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// Destruct and release array.
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extern "C" void
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__cxa_vec_delete(void *array_address,
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std::size_t element_size,
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std::size_t padding_size,
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void (*destructor) (void *))
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{
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__cxa_vec_delete2(array_address, element_size, padding_size,
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destructor,
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&operator delete []);
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}
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extern "C" void
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__cxa_vec_delete2(void *array_address,
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std::size_t element_size,
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std::size_t padding_size,
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void (*destructor) (void *),
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void (*dealloc) (void *))
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{
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char *base = static_cast<char *>(array_address);
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if (padding_size)
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{
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std::size_t element_count = reinterpret_cast<std::size_t *>(base)[-1];
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base -= padding_size;
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try
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{
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__cxa_vec_dtor(array_address, element_count, element_size,
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destructor);
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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dealloc(base);
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}
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__throw_exception_again;
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}
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}
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dealloc(base);
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}
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extern "C" void
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__cxa_vec_delete3(void *array_address,
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std::size_t element_size,
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std::size_t padding_size,
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void (*destructor) (void *),
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void (*dealloc) (void *, std::size_t))
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{
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char *base = static_cast <char *> (array_address);
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std::size_t size = 0;
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if (padding_size)
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{
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std::size_t element_count = reinterpret_cast<std::size_t *> (base)[-1];
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base -= padding_size;
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size = element_count * element_size + padding_size;
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try
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{
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__cxa_vec_dtor(array_address, element_count, element_size,
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destructor);
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}
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catch (...)
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{
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{
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uncatch_exception ue;
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dealloc(base, size);
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}
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__throw_exception_again;
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}
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}
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dealloc(base, size);
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}
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} // namespace __cxxabiv1
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