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//===------------------------ private_typeinfo.h --------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef __PRIVATE_TYPEINFO_H_
#define __PRIVATE_TYPEINFO_H_
#include "__cxxabi_config.h"
#include <typeinfo>
#include <cstddef>
namespace __cxxabiv1 {
class _LIBCXXABI_TYPE_VIS __shim_type_info : public std::type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__shim_type_info();
_LIBCXXABI_HIDDEN virtual void noop1() const;
_LIBCXXABI_HIDDEN virtual void noop2() const;
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *thrown_type,
void *&adjustedPtr) const = 0;
};
class _LIBCXXABI_TYPE_VIS __fundamental_type_info : public __shim_type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__fundamental_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
};
class _LIBCXXABI_TYPE_VIS __array_type_info : public __shim_type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__array_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
};
class _LIBCXXABI_TYPE_VIS __function_type_info : public __shim_type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__function_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
};
class _LIBCXXABI_TYPE_VIS __enum_type_info : public __shim_type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__enum_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
};
enum
{
unknown = 0,
public_path,
not_public_path,
yes,
no
};
class _LIBCXXABI_TYPE_VIS __class_type_info;
struct _LIBCXXABI_HIDDEN __dynamic_cast_info
{
// const data supplied to the search:
const __class_type_info* dst_type;
const void* static_ptr;
const __class_type_info* static_type;
std::ptrdiff_t src2dst_offset;
// Data that represents the answer:
// pointer to a dst_type which has (static_ptr, static_type) above it
const void* dst_ptr_leading_to_static_ptr;
// pointer to a dst_type which does not have (static_ptr, static_type) above it
const void* dst_ptr_not_leading_to_static_ptr;
// The following three paths are either unknown, public_path or not_public_path.
// access of path from dst_ptr_leading_to_static_ptr to (static_ptr, static_type)
int path_dst_ptr_to_static_ptr;
// access of path from (dynamic_ptr, dynamic_type) to (static_ptr, static_type)
// when there is no dst_type along the path
int path_dynamic_ptr_to_static_ptr;
// access of path from (dynamic_ptr, dynamic_type) to dst_type
// (not used if there is a (static_ptr, static_type) above a dst_type).
int path_dynamic_ptr_to_dst_ptr;
// Number of dst_types below (static_ptr, static_type)
int number_to_static_ptr;
// Number of dst_types not below (static_ptr, static_type)
int number_to_dst_ptr;
// Data that helps stop the search before the entire tree is searched:
// is_dst_type_derived_from_static_type is either unknown, yes or no.
int is_dst_type_derived_from_static_type;
// Number of dst_type in tree. If 0, then that means unknown.
int number_of_dst_type;
// communicates to a dst_type node that (static_ptr, static_type) was found
// above it.
bool found_our_static_ptr;
// communicates to a dst_type node that a static_type was found
// above it, but it wasn't (static_ptr, static_type)
bool found_any_static_type;
// Set whenever a search can be stopped
bool search_done;
};
// Has no base class
class _LIBCXXABI_TYPE_VIS __class_type_info : public __shim_type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__class_type_info();
_LIBCXXABI_HIDDEN void process_static_type_above_dst(__dynamic_cast_info *,
const void *,
const void *, int) const;
_LIBCXXABI_HIDDEN void process_static_type_below_dst(__dynamic_cast_info *,
const void *, int) const;
_LIBCXXABI_HIDDEN void process_found_base_class(__dynamic_cast_info *, void *,
int) const;
_LIBCXXABI_HIDDEN virtual void search_above_dst(__dynamic_cast_info *,
const void *, const void *,
int, bool) const;
_LIBCXXABI_HIDDEN virtual void
search_below_dst(__dynamic_cast_info *, const void *, int, bool) const;
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
_LIBCXXABI_HIDDEN virtual void
has_unambiguous_public_base(__dynamic_cast_info *, void *, int) const;
};
// Has one non-virtual public base class at offset zero
class _LIBCXXABI_TYPE_VIS __si_class_type_info : public __class_type_info {
public:
const __class_type_info *__base_type;
_LIBCXXABI_HIDDEN virtual ~__si_class_type_info();
_LIBCXXABI_HIDDEN virtual void search_above_dst(__dynamic_cast_info *,
const void *, const void *,
int, bool) const;
_LIBCXXABI_HIDDEN virtual void
search_below_dst(__dynamic_cast_info *, const void *, int, bool) const;
_LIBCXXABI_HIDDEN virtual void
has_unambiguous_public_base(__dynamic_cast_info *, void *, int) const;
};
struct _LIBCXXABI_HIDDEN __base_class_type_info
{
public:
const __class_type_info* __base_type;
long __offset_flags;
enum __offset_flags_masks
{
__virtual_mask = 0x1,
__public_mask = 0x2, // base is public
__offset_shift = 8
};
void search_above_dst(__dynamic_cast_info*, const void*, const void*, int, bool) const;
void search_below_dst(__dynamic_cast_info*, const void*, int, bool) const;
void has_unambiguous_public_base(__dynamic_cast_info*, void*, int) const;
};
// Has one or more base classes
class _LIBCXXABI_TYPE_VIS __vmi_class_type_info : public __class_type_info {
public:
unsigned int __flags;
unsigned int __base_count;
__base_class_type_info __base_info[1];
enum __flags_masks {
__non_diamond_repeat_mask = 0x1, // has two or more distinct base class
// objects of the same type
__diamond_shaped_mask = 0x2 // has base class object with two or
// more derived objects
};
_LIBCXXABI_HIDDEN virtual ~__vmi_class_type_info();
_LIBCXXABI_HIDDEN virtual void search_above_dst(__dynamic_cast_info *,
const void *, const void *,
int, bool) const;
_LIBCXXABI_HIDDEN virtual void
search_below_dst(__dynamic_cast_info *, const void *, int, bool) const;
_LIBCXXABI_HIDDEN virtual void
has_unambiguous_public_base(__dynamic_cast_info *, void *, int) const;
};
class _LIBCXXABI_TYPE_VIS __pbase_type_info : public __shim_type_info {
public:
unsigned int __flags;
const __shim_type_info *__pointee;
enum __masks {
__const_mask = 0x1,
__volatile_mask = 0x2,
__restrict_mask = 0x4,
__incomplete_mask = 0x8,
__incomplete_class_mask = 0x10,
__transaction_safe_mask = 0x20,
// This implements the following proposal from cxx-abi-dev (not yet part of
// the ABI document):
//
// http://sourcerytools.com/pipermail/cxx-abi-dev/2016-October/002986.html
//
// This is necessary for support of http://wg21.link/p0012, which permits
// throwing noexcept function and member function pointers and catching
// them as non-noexcept pointers.
__noexcept_mask = 0x40,
// Flags that cannot be removed by a standard conversion.
__no_remove_flags_mask = __const_mask | __volatile_mask | __restrict_mask,
// Flags that cannot be added by a standard conversion.
__no_add_flags_mask = __transaction_safe_mask | __noexcept_mask
};
_LIBCXXABI_HIDDEN virtual ~__pbase_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
};
class _LIBCXXABI_TYPE_VIS __pointer_type_info : public __pbase_type_info {
public:
_LIBCXXABI_HIDDEN virtual ~__pointer_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
_LIBCXXABI_HIDDEN bool can_catch_nested(const __shim_type_info *) const;
};
class _LIBCXXABI_TYPE_VIS __pointer_to_member_type_info
: public __pbase_type_info {
public:
const __class_type_info *__context;
_LIBCXXABI_HIDDEN virtual ~__pointer_to_member_type_info();
_LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
void *&) const;
_LIBCXXABI_HIDDEN bool can_catch_nested(const __shim_type_info *) const;
};
} // __cxxabiv1
#endif // __PRIVATE_TYPEINFO_H_