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c4f6640537
* libsupc++/Makefile.am (sources): Add guard.cc. * libsupc++/Makefile.in: Regenerated. * libsupc++/cxxabi.h (__cxa_guard_acquire): New function. (__cxa_guard_release): Likewise. (__cxa_guard_abort): Likewise. * libsupc++/guard.cc: New file. From-SVN: r59475
541 lines
19 KiB
C++
541 lines
19 KiB
C++
// new abi support -*- C++ -*-
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// Copyright (C) 2000, 2002 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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//
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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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//
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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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/* This file declares the new abi entry points into the runtime. It is not
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normally necessary for user programs to include this header, or use the
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entry points directly. However, this header is available should that be
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needed.
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Some of the entry points are intended for both C and C++, thus this header
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is includable from both C and C++. Though the C++ specific parts are not
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available in C, naturally enough. */
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#ifndef __CXXABI_H
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#define __CXXABI_H 1
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#ifdef __cplusplus
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// We use the compiler builtins __SIZE_TYPE__ and __PTRDIFF_TYPE__ instead of
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// std::size_t and std::ptrdiff_t respectively. This makes us independent of
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// the conformance level of <cstddef> and whether -fhonor-std was supplied.
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// <cstddef> is not currently available during compiler building anyway.
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// Including <stddef.h> would be wrong, as that would rudely place size_t in
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// the global namespace.
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#include <typeinfo>
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namespace __cxxabiv1
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{
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/* type information for int, float etc */
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class __fundamental_type_info
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: public std::type_info
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{
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public:
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virtual ~__fundamental_type_info ();
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public:
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explicit __fundamental_type_info (const char *__n)
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: std::type_info (__n)
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{ }
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};
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/* type information for array objects */
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class __array_type_info
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: public std::type_info
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{
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/* abi defined member functions */
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protected:
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virtual ~__array_type_info ();
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public:
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explicit __array_type_info (const char *__n)
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: std::type_info (__n)
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{ }
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};
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/* type information for functions (both member and non-member) */
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class __function_type_info
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: public std::type_info
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{
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/* abi defined member functions */
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public:
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virtual ~__function_type_info ();
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public:
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explicit __function_type_info (const char *__n)
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: std::type_info (__n)
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{ }
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/* implementation defined member functions */
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protected:
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virtual bool __is_function_p () const;
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};
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/* type information for enumerations */
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class __enum_type_info
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: public std::type_info
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{
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/* abi defined member functions */
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public:
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virtual ~__enum_type_info ();
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public:
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explicit __enum_type_info (const char *__n)
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: std::type_info (__n)
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{ }
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};
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/* common type information for simple pointers and pointers to member */
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class __pbase_type_info
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: public std::type_info
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{
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/* abi defined member variables */
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public:
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unsigned int __flags; /* qualification of the target object */
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const std::type_info *__pointee; /* type of pointed to object */
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/* abi defined member functions */
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public:
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virtual ~__pbase_type_info ();
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public:
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explicit __pbase_type_info (const char *__n,
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int __quals,
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const std::type_info *__type)
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: std::type_info (__n), __flags (__quals), __pointee (__type)
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{ }
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/* implementation defined types */
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public:
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enum __masks {
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__const_mask = 0x1,
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__volatile_mask = 0x2,
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__restrict_mask = 0x4,
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__incomplete_mask = 0x8,
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__incomplete_class_mask = 0x10
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};
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/* implementation defined member functions */
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protected:
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virtual bool __do_catch (const std::type_info *__thr_type,
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void **__thr_obj,
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unsigned __outer) const;
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protected:
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inline virtual bool __pointer_catch (const __pbase_type_info *__thr_type,
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void **__thr_obj,
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unsigned __outer) const;
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};
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/* type information for simple pointers */
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class __pointer_type_info
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: public __pbase_type_info
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{
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/* abi defined member functions */
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public:
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virtual ~__pointer_type_info ();
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public:
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explicit __pointer_type_info (const char *__n,
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int __quals,
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const std::type_info *__type)
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: __pbase_type_info (__n, __quals, __type)
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{ }
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/* implementation defined member functions */
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protected:
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virtual bool __is_pointer_p () const;
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protected:
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virtual bool __pointer_catch (const __pbase_type_info *__thr_type,
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void **__thr_obj,
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unsigned __outer) const;
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};
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/* type information for a pointer to member variable */
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class __pointer_to_member_type_info
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: public __pbase_type_info
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{
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/* abi defined member variables */
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public:
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__class_type_info *__context; /* class of the member */
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/* abi defined member functions */
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public:
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virtual ~__pointer_to_member_type_info ();
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public:
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explicit __pointer_to_member_type_info (const char *__n,
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int __quals,
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const std::type_info *__type,
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__class_type_info *__klass)
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: __pbase_type_info (__n, __quals, __type), __context (__klass)
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{ }
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/* implementation defined member functions */
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protected:
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virtual bool __pointer_catch (const __pbase_type_info *__thr_type,
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void **__thr_obj,
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unsigned __outer) const;
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};
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class __class_type_info;
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/* helper class for __vmi_class_type */
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class __base_class_type_info
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{
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/* abi defined member variables */
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public:
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const __class_type_info* __base_type; /* base class type */
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long __offset_flags; /* offset and info */
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/* implementation defined types */
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public:
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enum __offset_flags_masks {
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__virtual_mask = 0x1,
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__public_mask = 0x2,
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__hwm_bit = 2,
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__offset_shift = 8 /* bits to shift offset by */
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};
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/* implementation defined member functions */
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public:
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bool __is_virtual_p () const
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{ return __offset_flags & __virtual_mask; }
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bool __is_public_p () const
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{ return __offset_flags & __public_mask; }
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__PTRDIFF_TYPE__ __offset () const
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{
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// This shift, being of a signed type, is implementation defined. GCC
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// implements such shifts as arithmetic, which is what we want.
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return static_cast<__PTRDIFF_TYPE__> (__offset_flags) >> __offset_shift;
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}
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};
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/* type information for a class */
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class __class_type_info
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: public std::type_info
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{
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/* abi defined member functions */
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public:
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virtual ~__class_type_info ();
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public:
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explicit __class_type_info (const char *__n)
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: type_info (__n)
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{ }
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/* implementation defined types */
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public:
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/* sub_kind tells us about how a base object is contained within a derived
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object. We often do this lazily, hence the UNKNOWN value. At other times
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we may use NOT_CONTAINED to mean not publicly contained. */
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enum __sub_kind
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{
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__unknown = 0, /* we have no idea */
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__not_contained, /* not contained within us (in some */
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/* circumstances this might mean not contained */
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/* publicly) */
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__contained_ambig, /* contained ambiguously */
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__contained_virtual_mask = __base_class_type_info::__virtual_mask, /* via a virtual path */
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__contained_public_mask = __base_class_type_info::__public_mask, /* via a public path */
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__contained_mask = 1 << __base_class_type_info::__hwm_bit, /* contained within us */
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__contained_private = __contained_mask,
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__contained_public = __contained_mask | __contained_public_mask
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};
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public:
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struct __upcast_result;
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struct __dyncast_result;
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/* implementation defined member functions */
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protected:
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virtual bool __do_upcast (const __class_type_info *__dst_type, void **__obj_ptr) const;
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protected:
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virtual bool __do_catch (const type_info *__thr_type, void **__thr_obj,
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unsigned __outer) const;
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public:
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/* Helper for upcast. See if DST is us, or one of our bases. */
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/* Return false if not found, true if found. */
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virtual bool __do_upcast (const __class_type_info *__dst,
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const void *__obj,
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__upcast_result &__restrict __result) const;
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public:
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/* Indicate whether SRC_PTR of type SRC_TYPE is contained publicly within
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OBJ_PTR. OBJ_PTR points to a base object of our type, which is the
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destination type. SRC2DST indicates how SRC objects might be contained
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within this type. If SRC_PTR is one of our SRC_TYPE bases, indicate the
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virtuality. Returns not_contained for non containment or private
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containment. */
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inline __sub_kind __find_public_src (__PTRDIFF_TYPE__ __src2dst,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__src_ptr) const;
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public:
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/* dynamic cast helper. ACCESS_PATH gives the access from the most derived
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object to this base. DST_TYPE indicates the desired type we want. OBJ_PTR
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points to a base of our type within the complete object. SRC_TYPE
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indicates the static type started from and SRC_PTR points to that base
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within the most derived object. Fill in RESULT with what we find. Return
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true if we have located an ambiguous match. */
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virtual bool __do_dyncast (__PTRDIFF_TYPE__ __src2dst,
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__sub_kind __access_path,
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const __class_type_info *__dst_type,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__src_ptr,
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__dyncast_result &__result) const;
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public:
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/* Helper for find_public_subobj. SRC2DST indicates how SRC_TYPE bases are
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inherited by the type started from -- which is not necessarily the
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current type. The current type will be a base of the destination type.
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OBJ_PTR points to the current base. */
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virtual __sub_kind __do_find_public_src (__PTRDIFF_TYPE__ __src2dst,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__src_ptr) const;
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};
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/* type information for a class with a single non-virtual base */
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class __si_class_type_info
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: public __class_type_info
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{
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/* abi defined member variables */
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public:
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const __class_type_info *__base_type;
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/* abi defined member functions */
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public:
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virtual ~__si_class_type_info ();
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public:
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explicit __si_class_type_info (const char *__n,
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const __class_type_info *__base)
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: __class_type_info (__n), __base_type (__base)
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{ }
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/* implementation defined member functions */
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protected:
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virtual bool __do_dyncast (__PTRDIFF_TYPE__ __src2dst,
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__sub_kind __access_path,
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const __class_type_info *__dst_type,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__src_ptr,
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__dyncast_result &__result) const;
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virtual __sub_kind __do_find_public_src (__PTRDIFF_TYPE__ __src2dst,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__sub_ptr) const;
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virtual bool __do_upcast (const __class_type_info *__dst,
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const void *__obj,
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__upcast_result &__restrict __result) const;
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};
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/* type information for a class with multiple and/or virtual bases */
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class __vmi_class_type_info : public __class_type_info {
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/* abi defined member variables */
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public:
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unsigned int __flags; /* details about the class hierarchy */
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unsigned int __base_count; /* number of direct bases */
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__base_class_type_info __base_info[1]; /* array of bases */
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/* The array of bases uses the trailing array struct hack
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so this class is not constructable with a normal constructor. It is
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internally generated by the compiler. */
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/* abi defined member functions */
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public:
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virtual ~__vmi_class_type_info ();
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public:
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explicit __vmi_class_type_info (const char *__n,
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int ___flags)
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: __class_type_info (__n), __flags (___flags), __base_count (0)
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{ }
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/* implementation defined types */
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public:
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enum __flags_masks {
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__non_diamond_repeat_mask = 0x1, /* distinct instance of repeated base */
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__diamond_shaped_mask = 0x2, /* diamond shaped multiple inheritance */
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non_public_base_mask = 0x4, /* has non-public direct or indirect base */
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public_base_mask = 0x8, /* has public base (direct) */
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__flags_unknown_mask = 0x10
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};
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/* implementation defined member functions */
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protected:
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virtual bool __do_dyncast (__PTRDIFF_TYPE__ __src2dst,
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__sub_kind __access_path,
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const __class_type_info *__dst_type,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__src_ptr,
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__dyncast_result &__result) const;
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virtual __sub_kind __do_find_public_src (__PTRDIFF_TYPE__ __src2dst,
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const void *__obj_ptr,
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const __class_type_info *__src_type,
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const void *__src_ptr) const;
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virtual bool __do_upcast (const __class_type_info *__dst,
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const void *__obj,
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__upcast_result &__restrict __result) const;
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};
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/* dynamic cast runtime */
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extern "C"
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void *__dynamic_cast (const void *__src_ptr, /* object started from */
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const __class_type_info *__src_type, /* static type of object */
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const __class_type_info *__dst_type, /* desired target type */
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__PTRDIFF_TYPE__ __src2dst); /* how src and dst are related */
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/* src2dst has the following possible values
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>= 0: src_type is a unique public non-virtual base of dst_type
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dst_ptr + src2dst == src_ptr
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-1: unspecified relationship
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-2: src_type is not a public base of dst_type
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-3: src_type is a multiple public non-virtual base of dst_type */
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/* array ctor/dtor routines */
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/* allocate and construct array */
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extern "C"
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void *__cxa_vec_new (__SIZE_TYPE__ __element_count,
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__SIZE_TYPE__ __element_size,
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__SIZE_TYPE__ __padding_size,
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void (*__constructor) (void *),
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void (*__destructor) (void *));
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extern "C"
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void *__cxa_vec_new2 (__SIZE_TYPE__ __element_count,
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__SIZE_TYPE__ __element_size,
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__SIZE_TYPE__ __padding_size,
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void (*__constructor) (void *),
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void (*__destructor) (void *),
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void *(*__alloc) (__SIZE_TYPE__),
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void (*__dealloc) (void *));
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extern "C"
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void *__cxa_vec_new3 (__SIZE_TYPE__ __element_count,
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__SIZE_TYPE__ __element_size,
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__SIZE_TYPE__ __padding_size,
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void (*__constructor) (void *),
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void (*__destructor) (void *),
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void *(*__alloc) (__SIZE_TYPE__),
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void (*__dealloc) (void *, __SIZE_TYPE__));
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/* construct array */
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extern "C"
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void __cxa_vec_ctor (void *__array_address,
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__SIZE_TYPE__ __element_count,
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__SIZE_TYPE__ __element_size,
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void (*__constructor) (void *),
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void (*__destructor) (void *));
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extern "C"
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void __cxa_vec_cctor (void *dest_array,
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void *src_array,
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__SIZE_TYPE__ element_count,
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__SIZE_TYPE__ element_size,
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void (*constructor) (void *, void *),
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void (*destructor) (void *));
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/* destruct array */
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extern "C"
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void __cxa_vec_dtor (void *__array_address,
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__SIZE_TYPE__ __element_count,
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__SIZE_TYPE__ __element_size,
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void (*__destructor) (void *));
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/* destruct array */
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extern "C"
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void __cxa_vec_cleanup (void *__array_address,
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__SIZE_TYPE__ __element_count,
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__SIZE_TYPE__ __element_size,
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void (*__destructor) (void *));
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/* destruct and release array */
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extern "C"
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void __cxa_vec_delete (void *__array_address,
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__SIZE_TYPE__ __element_size,
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__SIZE_TYPE__ __padding_size,
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void (*__destructor) (void *));
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extern "C"
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void __cxa_vec_delete2 (void *__array_address,
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__SIZE_TYPE__ __element_size,
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__SIZE_TYPE__ __padding_size,
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void (*__destructor) (void *),
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void (*__dealloc) (void *));
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extern "C"
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|
void __cxa_vec_delete3 (void *__array_address,
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|
__SIZE_TYPE__ __element_size,
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|
__SIZE_TYPE__ __padding_size,
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|
void (*__destructor) (void *),
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|
void (*__dealloc) (void *, __SIZE_TYPE__));
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|
|
|
/* guard variables */
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|
|
|
/* The ABI requires a 64-bit type. */
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|
__extension__ typedef int __guard __attribute__((mode (__DI__)));
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|
|
|
extern "C"
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|
int __cxa_guard_acquire (__guard *);
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|
|
|
extern "C"
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|
void __cxa_guard_release (__guard *);
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|
|
|
extern "C"
|
|
void __cxa_guard_abort (__guard *);
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|
|
|
/* demangling routines */
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|
|
|
extern "C"
|
|
char *__cxa_demangle (const char *__mangled_name,
|
|
char *__output_buffer,
|
|
__SIZE_TYPE__ *__length,
|
|
int *__status);
|
|
|
|
// Returns the type_info for the currently handled exception [15.3/8], or
|
|
// null if there is none.
|
|
extern "C"
|
|
std::type_info *__cxa_current_exception_type ();
|
|
|
|
} /* namespace __cxxabiv1 */
|
|
|
|
/* User programs should use the alias `abi'. */
|
|
namespace abi = __cxxabiv1;
|
|
|
|
#else
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
#endif /* __CXXABI_H */
|