// New abi Support -*- C++ -*-
// Copyright (C) 2000-2015 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/>.
// Written by Nathan Sidwell, Codesourcery LLC, <nathan@codesourcery.com>
#include <cxxabi.h>
#include <new>
#include <exception>
#include <bits/exception_defines.h>
#include "unwind-cxx.h"
namespace __cxxabiv1
{
namespace
{
struct uncatch_exception
{
uncatch_exception();
~uncatch_exception () { __cxa_begin_catch (&p->unwindHeader); }
__cxa_exception* p;
private:
uncatch_exception&
operator=(const uncatch_exception&);
uncatch_exception(const uncatch_exception&);
};
uncatch_exception::uncatch_exception() : p(0)
{
__cxa_eh_globals *globals = __cxa_get_globals_fast ();
p = globals->caughtExceptions;
p->handlerCount -= 1;
globals->caughtExceptions = p->nextException;
globals->uncaughtExceptions += 1;
}
// Compute the total size with overflow checking.
std::size_t compute_size(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size)
{
if (element_size && element_count > std::size_t(-1) / element_size)
_GLIBCXX_THROW_OR_ABORT(std::bad_alloc());
std::size_t size = element_count * element_size;
if (size + padding_size < size)
_GLIBCXX_THROW_OR_ABORT(std::bad_alloc());
return size + padding_size;
}
}
// Allocate and construct array.
extern "C" void *
__cxa_vec_new(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size,
__cxa_cdtor_type constructor,
__cxa_cdtor_type destructor)
{
return __cxa_vec_new2(element_count, element_size, padding_size,
constructor, destructor,
&operator new[], &operator delete []);
}
extern "C" void *
__cxa_vec_new2(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size,
__cxa_cdtor_type constructor,
__cxa_cdtor_type destructor,
void *(*alloc) (std::size_t),
void (*dealloc) (void *))
{
std::size_t size
= compute_size(element_count, element_size, padding_size);
char *base = static_cast <char *> (alloc (size));
if (!base)
return base;
if (padding_size)
{
base += padding_size;
reinterpret_cast <std::size_t *> (base)[-1] = element_count;
#ifdef _GLIBCXX_ELTSIZE_IN_COOKIE
reinterpret_cast <std::size_t *> (base)[-2] = element_size;
#endif
}
__try
{
__cxa_vec_ctor(base, element_count, element_size,
constructor, destructor);
}
__catch(...)
{
{
uncatch_exception ue;
// Core issue 901 will probably be resolved such that a
// deleted operator delete means not freeing memory here.
if (dealloc)
dealloc(base - padding_size);
}
__throw_exception_again;
}
return base;
}
extern "C" void *
__cxa_vec_new3(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size,
__cxa_cdtor_type constructor,
__cxa_cdtor_type destructor,
void *(*alloc) (std::size_t),
void (*dealloc) (void *, std::size_t))
{
std::size_t size
= compute_size(element_count, element_size, padding_size);
char *base = static_cast<char *>(alloc (size));
if (!base)
return base;
if (padding_size)
{
base += padding_size;
reinterpret_cast<std::size_t *>(base)[-1] = element_count;
#ifdef _GLIBCXX_ELTSIZE_IN_COOKIE
reinterpret_cast <std::size_t *> (base)[-2] = element_size;
#endif
}
__try
{
__cxa_vec_ctor(base, element_count, element_size,
constructor, destructor);
}
__catch(...)
{
{
uncatch_exception ue;
if (dealloc)
dealloc(base - padding_size, size);
}
__throw_exception_again;
}
return base;
}
// Construct array.
extern "C" __cxa_vec_ctor_return_type
__cxa_vec_ctor(void *array_address,
std::size_t element_count,
std::size_t element_size,
__cxa_cdtor_type constructor,
__cxa_cdtor_type destructor)
{
std::size_t ix = 0;
char *ptr = static_cast<char *>(array_address);
__try
{
if (constructor)
for (; ix != element_count; ix++, ptr += element_size)
constructor(ptr);
}
__catch(...)
{
{
uncatch_exception ue;
__cxa_vec_cleanup(array_address, ix, element_size, destructor);
}
__throw_exception_again;
}
_GLIBCXX_CXA_VEC_CTOR_RETURN (array_address);
}
// Construct an array by copying.
extern "C" __cxa_vec_ctor_return_type
__cxa_vec_cctor(void *dest_array,
void *src_array,
std::size_t element_count,
std::size_t element_size,
__cxa_cdtor_return_type (*constructor) (void *, void *),
__cxa_cdtor_type destructor)
{
std::size_t ix = 0;
char *dest_ptr = static_cast<char *>(dest_array);
char *src_ptr = static_cast<char *>(src_array);
__try
{
if (constructor)
for (; ix != element_count;
ix++, src_ptr += element_size, dest_ptr += element_size)
constructor(dest_ptr, src_ptr);
}
__catch(...)
{
{
uncatch_exception ue;
__cxa_vec_cleanup(dest_array, ix, element_size, destructor);
}
__throw_exception_again;
}
_GLIBCXX_CXA_VEC_CTOR_RETURN (dest_array);
}
// Destruct array.
extern "C" void
__cxa_vec_dtor(void *array_address,
std::size_t element_count,
std::size_t element_size,
__cxa_cdtor_type destructor)
{
if (destructor)
{
char *ptr = static_cast<char *>(array_address);
std::size_t ix = element_count;
ptr += element_count * element_size;
__try
{
while (ix--)
{
ptr -= element_size;
destructor(ptr);
}
}
__catch(...)
{
{
uncatch_exception ue;
__cxa_vec_cleanup(array_address, ix, element_size, destructor);
}
__throw_exception_again;
}
}
}
// Destruct array as a result of throwing an exception.
// [except.ctor]/3 If a destructor called during stack unwinding
// exits with an exception, terminate is called.
extern "C" void
__cxa_vec_cleanup(void *array_address,
std::size_t element_count,
std::size_t element_size,
__cxa_cdtor_type destructor) throw()
{
if (destructor)
{
char *ptr = static_cast <char *> (array_address);
std::size_t ix = element_count;
ptr += element_count * element_size;
__try
{
while (ix--)
{
ptr -= element_size;
destructor(ptr);
}
}
__catch(...)
{
std::terminate();
}
}
}
// Destruct and release array.
extern "C" void
__cxa_vec_delete(void *array_address,
std::size_t element_size,
std::size_t padding_size,
__cxa_cdtor_type destructor)
{
__cxa_vec_delete2(array_address, element_size, padding_size,
destructor,
&operator delete []);
}
extern "C" void
__cxa_vec_delete2(void *array_address,
std::size_t element_size,
std::size_t padding_size,
__cxa_cdtor_type destructor,
void (*dealloc) (void *))
{
if (!array_address)
return;
char* base = static_cast<char *>(array_address);
if (padding_size)
{
std::size_t element_count = reinterpret_cast<std::size_t *>(base)[-1];
base -= padding_size;
__try
{
__cxa_vec_dtor(array_address, element_count, element_size,
destructor);
}
__catch(...)
{
{
uncatch_exception ue;
dealloc(base);
}
__throw_exception_again;
}
}
dealloc(base);
}
extern "C" void
__cxa_vec_delete3(void *array_address,
std::size_t element_size,
std::size_t padding_size,
__cxa_cdtor_type destructor,
void (*dealloc) (void *, std::size_t))
{
if (!array_address)
return;
char* base = static_cast <char *> (array_address);
std::size_t size = 0;
if (padding_size)
{
std::size_t element_count = reinterpret_cast<std::size_t *> (base)[-1];
base -= padding_size;
size = element_count * element_size + padding_size;
__try
{
__cxa_vec_dtor(array_address, element_count, element_size,
destructor);
}
__catch(...)
{
{
uncatch_exception ue;
dealloc(base, size);
}
__throw_exception_again;
}
}
dealloc(base, size);
}
} // namespace __cxxabiv1
#if defined(__arm__) && defined(__ARM_EABI__)
// The ARM C++ ABI requires that the library provide these additional
// helper functions. There are placed in this file, despite being
// architecture-specifier, so that the compiler can inline the __cxa
// functions into these functions as appropriate.
namespace __aeabiv1
{
extern "C" void *
__aeabi_vec_ctor_nocookie_nodtor (void *array_address,
abi::__cxa_cdtor_type constructor,
std::size_t element_size,
std::size_t element_count)
{
return abi::__cxa_vec_ctor (array_address, element_count, element_size,
constructor, /*destructor=*/NULL);
}
extern "C" void *
__aeabi_vec_ctor_cookie_nodtor (void *array_address,
abi::__cxa_cdtor_type constructor,
std::size_t element_size,
std::size_t element_count)
{
if (array_address == NULL)
return NULL;
array_address = reinterpret_cast<std::size_t *>(array_address) + 2;
reinterpret_cast<std::size_t *>(array_address)[-2] = element_size;
reinterpret_cast<std::size_t *>(array_address)[-1] = element_count;
return abi::__cxa_vec_ctor (array_address,
element_count, element_size,
constructor, /*destructor=*/NULL);
}
extern "C" void *
__aeabi_vec_cctor_nocookie_nodtor (void *dest_array,
void *src_array,
std::size_t element_size,
std::size_t element_count,
void *(*constructor) (void *, void *))
{
return abi::__cxa_vec_cctor (dest_array, src_array,
element_count, element_size,
constructor, NULL);
}
extern "C" void *
__aeabi_vec_new_cookie_noctor (std::size_t element_size,
std::size_t element_count)
{
return abi::__cxa_vec_new(element_count, element_size,
2 * sizeof (std::size_t),
/*constructor=*/NULL, /*destructor=*/NULL);
}
extern "C" void *
__aeabi_vec_new_nocookie (std::size_t element_size,
std::size_t element_count,
abi::__cxa_cdtor_type constructor)
{
return abi::__cxa_vec_new (element_count, element_size, 0, constructor,
NULL);
}
extern "C" void *
__aeabi_vec_new_cookie_nodtor (std::size_t element_size,
std::size_t element_count,
abi::__cxa_cdtor_type constructor)
{
return abi::__cxa_vec_new(element_count, element_size,
2 * sizeof (std::size_t),
constructor, NULL);
}
extern "C" void *
__aeabi_vec_new_cookie(std::size_t element_size,
std::size_t element_count,
abi::__cxa_cdtor_type constructor,
abi::__cxa_cdtor_type destructor)
{
return abi::__cxa_vec_new (element_count, element_size,
2 * sizeof (std::size_t),
constructor, destructor);
}
extern "C" void *
__aeabi_vec_dtor (void *array_address,
abi::__cxa_cdtor_type destructor,
std::size_t element_size,
std::size_t element_count)
{
abi::__cxa_vec_dtor (array_address, element_count, element_size,
destructor);
return reinterpret_cast<std::size_t*> (array_address) - 2;
}
extern "C" void *
__aeabi_vec_dtor_cookie (void *array_address,
abi::__cxa_cdtor_type destructor)
{
if (!array_address)
return NULL;
abi::__cxa_vec_dtor (array_address,
reinterpret_cast<std::size_t *>(array_address)[-1],
reinterpret_cast<std::size_t *>(array_address)[-2],
destructor);
return reinterpret_cast<std::size_t*> (array_address) - 2;
}
extern "C" void
__aeabi_vec_delete (void *array_address,
abi::__cxa_cdtor_type destructor)
{
if (!array_address)
return;
abi::__cxa_vec_delete (array_address,
reinterpret_cast<std::size_t *>(array_address)[-2],
2 * sizeof (std::size_t),
destructor);
}
extern "C" void
__aeabi_vec_delete3 (void *array_address,
abi::__cxa_cdtor_type destructor,
void (*dealloc) (void *, std::size_t))
{
if (!array_address)
return;
abi::__cxa_vec_delete3 (array_address,
reinterpret_cast<std::size_t *>(array_address)[-2],
2 * sizeof (std::size_t),
destructor, dealloc);
}
extern "C" void
__aeabi_vec_delete3_nodtor (void *array_address,
void (*dealloc) (void *, std::size_t))
{
if (!array_address)
return;
abi::__cxa_vec_delete3 (array_address,
reinterpret_cast<std::size_t *>(array_address)[-2],
2 * sizeof (std::size_t),
/*destructor=*/NULL, dealloc);
}
} // namespace __aeabiv1
#endif // defined(__arm__) && defined(__ARM_EABI__)