ReactOS 0.4.15-dev-7659-ga55345b
cppexcept.h
Go to the documentation of this file.
1/*
2 * msvcrt C++ exception handling
3 *
4 * Copyright 2002 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21#ifndef __MSVCRT_CPPEXCEPT_H
22#define __MSVCRT_CPPEXCEPT_H
23
24#include "wine/asm.h"
25
26#define CXX_FRAME_MAGIC_VC6 0x19930520
27#define CXX_FRAME_MAGIC_VC7 0x19930521
28#define CXX_FRAME_MAGIC_VC8 0x19930522
29#define CXX_EXCEPTION 0xe06d7363
30
31#define FUNC_DESCR_SYNCHRONOUS 1 /* synchronous exceptions only (built with /EHs and /EHsc) */
32
33typedef void (*vtable_ptr)(void);
34
35/* type_info object, see cpp.c for implementation */
36typedef struct __type_info
37{
38 const vtable_ptr *vtable;
39 char *name; /* Unmangled name, allocated lazily */
40 char mangled[64]; /* Variable length, but we declare it large enough for static RTTI */
42
43/* exception object */
44typedef struct __exception
45{
46 const vtable_ptr *vtable;
47 char *name; /* Name of this exception, always a new copy for each object */
48 BOOL do_free; /* Whether to free 'name' in our dtor */
50
52
53/* offsets for computing the this pointer */
54typedef struct
55{
56 int this_offset; /* offset of base class this pointer from start of object */
57 int vbase_descr; /* offset of virtual base class descriptor */
58 int vbase_offset; /* offset of this pointer offset in virtual base class descriptor */
60
61/* complete information about a C++ type */
62#ifndef __x86_64__
63typedef struct __cxx_type_info
64{
65 UINT flags; /* flags (see CLASS_* flags below) */
66 const type_info *type_info; /* C++ type info */
67 this_ptr_offsets offsets; /* offsets for computing the this pointer */
68 unsigned int size; /* object size */
69 cxx_copy_ctor copy_ctor; /* copy constructor */
71#else
72typedef struct __cxx_type_info
73{
74 UINT flags;
75 unsigned int type_info;
77 unsigned int size;
78 unsigned int copy_ctor;
80#endif
81
82#define CLASS_IS_SIMPLE_TYPE 1
83#define CLASS_HAS_VIRTUAL_BASE_CLASS 4
84
85/* table of C++ types that apply for a given object */
86#ifndef __x86_64__
87typedef struct __cxx_type_info_table
88{
89 UINT count; /* number of types */
90 const cxx_type_info *info[3]; /* variable length, we declare it large enough for static RTTI */
92#else
93typedef struct __cxx_type_info_table
94{
95 UINT count;
96 unsigned int info[3];
98#endif
99
102
105 const struct __cxx_function_descr*, int nested_trylevel,
106 EXCEPTION_REGISTRATION_RECORD *nested_frame, DWORD unknown3 );
107
108/* type information for an exception object */
109#ifndef __x86_64__
110typedef struct __cxx_exception_type
111{
112 UINT flags; /* TYPE_FLAG flags */
113 void (*destructor)(void);/* exception object destructor */
114 cxx_exc_custom_handler custom_handler; /* custom handler for this exception */
115 const cxx_type_info_table *type_info_table; /* list of types for this exception object */
117#else
118typedef struct
119{
120 UINT flags;
121 unsigned int destructor;
122 unsigned int custom_handler;
123 unsigned int type_info_table;
125#endif
126
129
130static inline const char *dbgstr_type_info( const type_info *info )
131{
132 if (!info) return "{}";
133 return wine_dbg_sprintf( "{vtable=%p name=%s (%s)}",
134 info->vtable, info->mangled, info->name ? info->name : "" );
135}
136
137/* compute the this pointer for a base class of a given type */
138static inline void *get_this_pointer( const this_ptr_offsets *off, void *object )
139{
140 if (!object) return NULL;
141
142 if (off->vbase_descr >= 0)
143 {
144 int *offset_ptr;
145
146 /* move this ptr to vbase descriptor */
147 object = (char *)object + off->vbase_descr;
148 /* and fetch additional offset from vbase descriptor */
149 offset_ptr = (int *)(*(char **)object + off->vbase_offset);
150 object = (char *)object + *offset_ptr;
151 }
152
153 object = (char *)object + off->this_offset;
154 return object;
155}
156
157#ifndef __x86_64__
158#define DEFINE_EXCEPTION_TYPE_INFO(type, base_no, cl1, cl2) \
159\
160static const cxx_type_info type ## _cxx_type_info = { \
161 0, \
162 & type ##_type_info, \
163 { 0, -1, 0 }, \
164 sizeof(type), \
165 (cxx_copy_ctor)THISCALL(MSVCRT_ ## type ##_copy_ctor) \
166}; \
167\
168static const cxx_type_info_table type ## _type_info_table = { \
169 base_no+1, \
170 { \
171 & type ## _cxx_type_info, \
172 cl1, \
173 cl2 \
174 } \
175}; \
176\
177static const cxx_exception_type type ## _exception_type = { \
178 0, \
179 (cxx_copy_ctor)THISCALL(MSVCRT_ ## type ## _dtor), \
180 NULL, \
181 & type ## _type_info_table \
182};
183
184#else
185
186#define DEFINE_EXCEPTION_TYPE_INFO(type, base_no, cl1, cl2) \
187\
188static cxx_type_info type ## _cxx_type_info = { \
189 0, \
190 0xdeadbeef, \
191 { 0, -1, 0 }, \
192 sizeof(type), \
193 0xdeadbeef \
194}; \
195\
196static cxx_type_info_table type ## _type_info_table = { \
197 base_no+1, \
198 { \
199 0xdeadbeef, \
200 0xdeadbeef, \
201 0xdeadbeef \
202 } \
203}; \
204\
205static cxx_exception_type type ##_exception_type = { \
206 0, \
207 0xdeadbeef, \
208 0, \
209 0xdeadbeef \
210}; \
211\
212static void init_ ## type ## _cxx(char *base) \
213{ \
214 type ## _cxx_type_info.type_info = (char *)&type ## _type_info - base; \
215 type ## _cxx_type_info.copy_ctor = (char *)MSVCRT_ ## type ## _copy_ctor - base; \
216 type ## _type_info_table.info[0] = (char *)&type ## _cxx_type_info - base; \
217 type ## _type_info_table.info[1] = (char *)cl1 - base; \
218 type ## _type_info_table.info[2] = (char *)cl2 - base; \
219 type ## _exception_type.destructor = (char *)MSVCRT_ ## type ## _dtor - base; \
220 type ## _exception_type.type_info_table = (char *)&type ## _type_info_table - base; \
221}
222#endif
223
224#endif /* __MSVCRT_CPPEXCEPT_H */
LONG NTSTATUS
Definition: precomp.h:26
#define NULL
Definition: types.h:112
const char * wine_dbg_sprintf(const char *format,...)
Definition: compat.c:296
#define CDECL
Definition: compat.h:29
CONTEXT * PCONTEXT
Definition: compat.h:699
struct _EXCEPTION_RECORD * PEXCEPTION_RECORD
unsigned int BOOL
Definition: ntddk_ex.h:94
unsigned long DWORD
Definition: ntddk_ex.h:95
GLbitfield flags
Definition: glext.h:7161
int CDECL _XcptFilter(NTSTATUS, PEXCEPTION_POINTERS)
Definition: except.c:274
struct __type_info type_info
static const char * dbgstr_type_info(const type_info *info)
Definition: cppexcept.h:155
void(* cxx_copy_ctor)(void)
Definition: cppexcept.h:108
struct __exception exception
struct __cxx_type_info_table cxx_type_info_table
struct __cxx_exception_type cxx_exception_type
DWORD(* cxx_exc_custom_handler)(PEXCEPTION_RECORD, cxx_exception_frame *, PCONTEXT, EXCEPTION_REGISTRATION_RECORD **, const cxx_function_descr *, int nested_trylevel, EXCEPTION_REGISTRATION_RECORD *nested_frame, DWORD unknown3)
Definition: cppexcept.h:137
struct __cxx_type_info cxx_type_info
void WINAPI _CxxThrowException(exception *, const cxx_exception_type *)
Definition: cpp.c:1572
void(* vtable_ptr)()
Definition: cppexcept.h:37
static void * get_this_pointer(const this_ptr_offsets *off, void *object)
Definition: cppexcept.h:163
unsigned int UINT
Definition: ndis.h:50
#define DWORD
Definition: nt_native.h:44
cxx_exc_custom_handler custom_handler
Definition: cppexcept.h:147
const cxx_type_info_table * type_info_table
Definition: cppexcept.h:148
void(* destructor)(void)
Definition: cppexcept.h:146
cxx_copy_ctor copy_ctor
Definition: cppexcept.h:125
const type_info * type_info
Definition: cppexcept.h:122
this_ptr_offsets offsets
Definition: cppexcept.h:123
unsigned int size
Definition: cppexcept.h:124
BOOL do_free
Definition: cppexcept.h:48
char * name
Definition: cpp.c:28
vtable_ptr * vtable
Definition: cpp.c:27
vtable_ptr * vtable
Definition: cpp.c:34
char mangled[16]
Definition: cpp.c:36
char * name
Definition: cpp.c:35
#define WINAPI
Definition: msvc.h:6
void(* cxx_copy_ctor)(void)
Definition: cppexcept.h:51
DWORD(* cxx_exc_custom_handler)(PEXCEPTION_RECORD, struct __cxx_exception_frame *, PCONTEXT, EXCEPTION_REGISTRATION_RECORD **, const struct __cxx_function_descr *, int nested_trylevel, EXCEPTION_REGISTRATION_RECORD *nested_frame, DWORD unknown3)
Definition: cppexcept.h:103
void(* vtable_ptr)(void)
Definition: cppexcept.h:33