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Diffstat (limited to 'contrib/libstdc++/libsupc++/cxxabi.h')
| -rw-r--r-- | contrib/libstdc++/libsupc++/cxxabi.h | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/contrib/libstdc++/libsupc++/cxxabi.h b/contrib/libstdc++/libsupc++/cxxabi.h new file mode 100644 index 0000000..dd6b774 --- /dev/null +++ b/contrib/libstdc++/libsupc++/cxxabi.h @@ -0,0 +1,526 @@ +// new abi support -*- C++ -*- + +// Copyright (C) 2000 Free Software Foundation, Inc. +// +// This file is part of GNU CC. +// +// GNU CC 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 2, or (at your option) +// any later version. +// +// GNU CC 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. +// +// You should have received a copy of the GNU General Public License +// along with GNU CC; see the file COPYING. If not, write to +// the Free Software Foundation, 59 Temple Place - Suite 330, +// Boston, MA 02111-1307, USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +// Written by Nathan Sidwell, Codesourcery LLC, <nathan@codesourcery.com> + +/* This file declares the new abi entry points into the runtime. It is not + normally necessary for user programs to include this header, or use the + entry points directly. However, this header is available should that be + needed. + + Some of the entry points are intended for both C and C++, thus this header + is includable from both C and C++. Though the C++ specific parts are not + available in C, naturally enough. */ + +#ifndef __CXXABI_H +#define __CXXABI_H 1 + +#ifdef __cplusplus + +// We use the compiler builtins __SIZE_TYPE__ and __PTRDIFF_TYPE__ instead of +// std::size_t and std::ptrdiff_t respectively. This makes us independent of +// the conformance level of <cstddef> and whether -fhonor-std was supplied. +// <cstddef> is not currently available during compiler building anyway. +// Including <stddef.h> would be wrong, as that would rudely place size_t in +// the global namespace. + +#include <typeinfo> + +namespace __cxxabiv1 +{ + +/* type information for int, float etc */ +class __fundamental_type_info + : public std::type_info +{ +public: + virtual ~__fundamental_type_info (); +public: + explicit __fundamental_type_info (const char *__n) + : std::type_info (__n) + { } +}; + +/* type information for array objects */ +class __array_type_info + : public std::type_info +{ +/* abi defined member functions */ +protected: + virtual ~__array_type_info (); +public: + explicit __array_type_info (const char *__n) + : std::type_info (__n) + { } +}; + +/* type information for functions (both member and non-member) */ +class __function_type_info + : public std::type_info +{ +/* abi defined member functions */ +public: + virtual ~__function_type_info (); +public: + explicit __function_type_info (const char *__n) + : std::type_info (__n) + { } + +/* implementation defined member functions */ +protected: + virtual bool __is_function_p () const; +}; + +/* type information for enumerations */ +class __enum_type_info + : public std::type_info +{ +/* abi defined member functions */ +public: + virtual ~__enum_type_info (); +public: + explicit __enum_type_info (const char *__n) + : std::type_info (__n) + { } +}; + +/* common type information for simple pointers and pointers to member */ +class __pbase_type_info + : public std::type_info +{ +/* abi defined member variables */ +public: + unsigned int __qualifier_flags; /* qualification of the target object */ + const std::type_info *__pointee; /* type of pointed to object */ + +/* abi defined member functions */ +public: + virtual ~__pbase_type_info (); +public: + explicit __pbase_type_info (const char *__n, + int __quals, + const std::type_info *__type) + : std::type_info (__n), __qualifier_flags (__quals), __pointee (__type) + { } + +/* implementation defined types */ +public: + enum __qualifier_masks { + __const_mask = 0x1, + __volatile_mask = 0x2, + __restrict_mask = 0x4, + __incomplete_mask = 0x8, + __incomplete_class_mask = 0x10 + }; + +/* implementation defined member functions */ +protected: + virtual bool __do_catch (const std::type_info *__thr_type, + void **__thr_obj, + unsigned __outer) const; +protected: + inline virtual bool __pointer_catch (const __pbase_type_info *__thr_type, + void **__thr_obj, + unsigned __outer) const; +}; + +/* type information for simple pointers */ +class __pointer_type_info + : public __pbase_type_info +{ +/* abi defined member functions */ +public: + virtual ~__pointer_type_info (); +public: + explicit __pointer_type_info (const char *__n, + int __quals, + const std::type_info *__type) + : __pbase_type_info (__n, __quals, __type) + { } + +/* implementation defined member functions */ +protected: + virtual bool __is_pointer_p () const; + +protected: + virtual bool __pointer_catch (const __pbase_type_info *__thr_type, + void **__thr_obj, + unsigned __outer) const; +}; + +/* type information for a pointer to member variable */ +class __pointer_to_member_type_info + : public __pbase_type_info +{ +/* abi defined member variables */ +public: + __class_type_info *__context_class; /* class of the member */ + +/* abi defined member functions */ +public: + virtual ~__pointer_to_member_type_info (); +public: + explicit __pointer_to_member_type_info (const char *__n, + int __quals, + const std::type_info *__type, + __class_type_info *__klass) + : __pbase_type_info (__n, __quals, __type), __context_class (__klass) + { } + +/* implementation defined member functions */ +protected: + virtual bool __pointer_catch (const __pbase_type_info *__thr_type, + void **__thr_obj, + unsigned __outer) const; +}; + +class __class_type_info; + +/* helper class for __vmi_class_type */ +class __base_class_info +{ +/* abi defined member variables */ +public: + const __class_type_info *__base; /* base class type */ + long __offset_flags; /* offset and info */ + +/* implementation defined types */ +public: + enum __offset_flags_masks { + __virtual_mask = 0x1, + __public_mask = 0x2, + hwm_bit = 2, + offset_shift = 8 /* bits to shift offset by */ + }; + +/* implementation defined member functions */ +public: + bool __is_virtual_p () const + { return __offset_flags & __virtual_mask; } + bool __is_public_p () const + { return __offset_flags & __public_mask; } + __PTRDIFF_TYPE__ __offset () const + { + // This shift, being of a signed type, is implementation defined. GCC + // implements such shifts as arithmetic, which is what we want. + return static_cast<__PTRDIFF_TYPE__> (__offset_flags) >> offset_shift; + } +}; + +/* type information for a class */ +class __class_type_info + : public std::type_info +{ +/* abi defined member functions */ +public: + virtual ~__class_type_info (); +public: + explicit __class_type_info (const char *__n) + : type_info (__n) + { } + +/* implementation defined types */ +public: + /* sub_kind tells us about how a base object is contained within a derived + object. We often do this lazily, hence the UNKNOWN value. At other times + we may use NOT_CONTAINED to mean not publicly contained. */ + enum __sub_kind + { + __unknown = 0, /* we have no idea */ + __not_contained, /* not contained within us (in some */ + /* circumstances this might mean not contained */ + /* publicly) */ + __contained_ambig, /* contained ambiguously */ + + __contained_virtual_mask = __base_class_info::__virtual_mask, /* via a virtual path */ + __contained_public_mask = __base_class_info::__public_mask, /* via a public path */ + __contained_mask = 1 << __base_class_info::hwm_bit, /* contained within us */ + + __contained_private = __contained_mask, + __contained_public = __contained_mask | __contained_public_mask + }; + +public: + struct __upcast_result; + struct __dyncast_result; + +/* implementation defined member functions */ +protected: + virtual bool __do_upcast (const __class_type_info *__dst_type, void **__obj_ptr) const; + +protected: + virtual bool __do_catch (const type_info *__thr_type, void **__thr_obj, + unsigned __outer) const; + + +public: + /* Helper for upcast. See if DST is us, or one of our bases. */ + /* Return false if not found, true if found. */ + virtual bool __do_upcast (const __class_type_info *__dst, + const void *__obj, + __upcast_result &__restrict __result) const; + +public: + /* Indicate whether SRC_PTR of type SRC_TYPE is contained publicly within + OBJ_PTR. OBJ_PTR points to a base object of our type, which is the + destination type. SRC2DST indicates how SRC objects might be contained + within this type. If SRC_PTR is one of our SRC_TYPE bases, indicate the + virtuality. Returns not_contained for non containment or private + containment. */ + inline __sub_kind __find_public_src (__PTRDIFF_TYPE__ __src2dst, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__src_ptr) const; + +public: + /* dynamic cast helper. ACCESS_PATH gives the access from the most derived + object to this base. DST_TYPE indicates the desired type we want. OBJ_PTR + points to a base of our type within the complete object. SRC_TYPE + indicates the static type started from and SRC_PTR points to that base + within the most derived object. Fill in RESULT with what we find. Return + true if we have located an ambiguous match. */ + virtual bool __do_dyncast (__PTRDIFF_TYPE__ __src2dst, + __sub_kind __access_path, + const __class_type_info *__dst_type, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__src_ptr, + __dyncast_result &__result) const; +public: + /* Helper for find_public_subobj. SRC2DST indicates how SRC_TYPE bases are + inherited by the type started from -- which is not necessarily the + current type. The current type will be a base of the destination type. + OBJ_PTR points to the current base. */ + virtual __sub_kind __do_find_public_src (__PTRDIFF_TYPE__ __src2dst, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__src_ptr) const; +}; + +/* type information for a class with a single non-virtual base */ +class __si_class_type_info + : public __class_type_info +{ +/* abi defined member variables */ +public: + const __class_type_info *__base_type; + +/* abi defined member functions */ +public: + virtual ~__si_class_type_info (); +public: + explicit __si_class_type_info (const char *__n, + const __class_type_info *__base) + : __class_type_info (__n), __base_type (__base) + { } + +/* implementation defined member functions */ +protected: + virtual bool __do_dyncast (__PTRDIFF_TYPE__ __src2dst, + __sub_kind __access_path, + const __class_type_info *__dst_type, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__src_ptr, + __dyncast_result &__result) const; + virtual __sub_kind __do_find_public_src (__PTRDIFF_TYPE__ __src2dst, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__sub_ptr) const; + virtual bool __do_upcast (const __class_type_info *__dst, + const void *__obj, + __upcast_result &__restrict __result) const; +}; + +/* type information for a class with multiple and/or virtual bases */ +class __vmi_class_type_info : public __class_type_info { +/* abi defined member variables */ +public: + unsigned int __flags; /* details about the class hierarchy */ + unsigned int __base_count; /* number of direct bases */ + __base_class_info const __base_info[1]; /* array of bases */ + /* The array of bases uses the trailing array struct hack + so this class is not constructable with a normal constructor. It is + internally generated by the compiler. */ + +/* abi defined member functions */ +public: + virtual ~__vmi_class_type_info (); +public: + explicit __vmi_class_type_info (const char *__n, + int ___flags) + : __class_type_info (__n), __flags (___flags), __base_count (0) + { } + +/* implementation defined types */ +public: + enum __flags_masks { + __non_diamond_repeat_mask = 0x1, /* distinct instance of repeated base */ + __diamond_shaped_mask = 0x2, /* diamond shaped multiple inheritance */ + non_public_base_mask = 0x4, /* has non-public direct or indirect base */ + public_base_mask = 0x8, /* has public base (direct) */ + + __flags_unknown_mask = 0x10 + }; + +/* implementation defined member functions */ +protected: + virtual bool __do_dyncast (__PTRDIFF_TYPE__ __src2dst, + __sub_kind __access_path, + const __class_type_info *__dst_type, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__src_ptr, + __dyncast_result &__result) const; + virtual __sub_kind __do_find_public_src (__PTRDIFF_TYPE__ __src2dst, + const void *__obj_ptr, + const __class_type_info *__src_type, + const void *__src_ptr) const; + virtual bool __do_upcast (const __class_type_info *__dst, + const void *__obj, + __upcast_result &__restrict __result) const; +}; + +/* dynamic cast runtime */ +extern "C" +void *__dynamic_cast (const void *__src_ptr, /* object started from */ + const __class_type_info *__src_type, /* static type of object */ + const __class_type_info *__dst_type, /* desired target type */ + __PTRDIFF_TYPE__ __src2dst); /* how src and dst are related */ + + /* src2dst has the following possible values + >= 0: src_type is a unique public non-virtual base of dst_type + dst_ptr + src2dst == src_ptr + -1: unspecified relationship + -2: src_type is not a public base of dst_type + -3: src_type is a multiple public non-virtual base of dst_type */ + +/* array ctor/dtor routines */ + +/* allocate and construct array */ +extern "C" +void *__cxa_vec_new (__SIZE_TYPE__ __element_count, + __SIZE_TYPE__ __element_size, + __SIZE_TYPE__ __padding_size, + void (*__constructor) (void *), + void (*__destructor) (void *)); + +extern "C" +void *__cxa_vec_new2 (__SIZE_TYPE__ __element_count, + __SIZE_TYPE__ __element_size, + __SIZE_TYPE__ __padding_size, + void (*__constructor) (void *), + void (*__destructor) (void *), + void *(*__alloc) (__SIZE_TYPE__), + void (*__dealloc) (void *)); + +extern "C" +void *__cxa_vec_new3 (__SIZE_TYPE__ __element_count, + __SIZE_TYPE__ __element_size, + __SIZE_TYPE__ __padding_size, + void (*__constructor) (void *), + void (*__destructor) (void *), + void *(*__alloc) (__SIZE_TYPE__), + void (*__dealloc) (void *, __SIZE_TYPE__)); + +/* construct array */ +extern "C" +void __cxa_vec_ctor (void *__array_address, + __SIZE_TYPE__ __element_count, + __SIZE_TYPE__ __element_size, + void (*__constructor) (void *), + void (*__destructor) (void *)); + +extern "C" +void __cxa_vec_cctor (void *dest_array, + void *src_array, + __SIZE_TYPE__ element_count, + __SIZE_TYPE__ element_size, + void (*constructor) (void *, void *), + void (*destructor) (void *)); + +/* destruct array */ +extern "C" +void __cxa_vec_dtor (void *__array_address, + __SIZE_TYPE__ __element_count, + __SIZE_TYPE__ __element_size, + void (*__destructor) (void *)); + +/* destruct array */ +extern "C" +void __cxa_vec_cleanup (void *__array_address, + __SIZE_TYPE__ __element_count, + __SIZE_TYPE__ __element_size, + void (*__destructor) (void *)); + +/* destruct and release array */ +extern "C" +void __cxa_vec_delete (void *__array_address, + __SIZE_TYPE__ __element_size, + __SIZE_TYPE__ __padding_size, + void (*__destructor) (void *)); + +extern "C" +void __cxa_vec_delete2 (void *__array_address, + __SIZE_TYPE__ __element_size, + __SIZE_TYPE__ __padding_size, + void (*__destructor) (void *), + void (*__dealloc) (void *)); + +extern "C" +void __cxa_vec_delete3 (void *__array_address, + __SIZE_TYPE__ __element_size, + __SIZE_TYPE__ __padding_size, + void (*__destructor) (void *), + void (*__dealloc) (void *, __SIZE_TYPE__)); + +/* demangling routines */ + +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 */ |
