2 * msvcrt C++ exception handling
4 * Copyright 2002 Alexandre Julliard
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #ifndef __MSVCRT_CPPEXCEPT_H
22 #define __MSVCRT_CPPEXCEPT_H
24 #define CXX_FRAME_MAGIC 0x19930520
25 #define CXX_EXCEPTION 0xe06d7363
27 typedef void (*vtable_ptr)();
29 /* type_info object, see cpp.c for inplementation */
30 typedef struct __type_info
33 char *name; /* Unmangled name, allocated lazily */
34 char mangled[32]; /* Variable length, but we declare it large enough for static RTTI */
37 /* the exception frame used by CxxFrameHandler */
38 typedef struct __cxx_exception_frame
40 EXCEPTION_REGISTRATION_RECORD frame; /* the standard exception frame */
43 } cxx_exception_frame;
45 /* info about a single catch {} block */
46 typedef struct __catchblock_info
48 UINT flags; /* flags (see below) */
49 type_info *type_info; /* C++ type caught by this block */
50 int offset; /* stack offset to copy exception object to */
51 void (*handler)(); /* catch block handler code */
53 #define TYPE_FLAG_CONST 1
54 #define TYPE_FLAG_VOLATILE 2
55 #define TYPE_FLAG_REFERENCE 8
57 /* info about a single try {} block */
58 typedef struct __tryblock_info
60 int start_level; /* start trylevel of that block */
61 int end_level; /* end trylevel of that block */
62 int catch_level; /* initial trylevel of the catch block */
63 int catchblock_count; /* count of catch blocks in array */
64 catchblock_info *catchblock; /* array of catch blocks */
67 /* info about the unwind handler for a given trylevel */
68 typedef struct __unwind_info
70 int prev; /* prev trylevel unwind handler, to run after this one */
71 void (*handler)(); /* unwind handler */
74 /* descriptor of all try blocks of a given function */
75 typedef struct __cxx_function_descr
77 UINT magic; /* must be CXX_FRAME_MAGIC */
78 UINT unwind_count; /* number of unwind handlers */
79 unwind_info *unwind_table; /* array of unwind handlers */
80 UINT tryblock_count; /* number of try blocks */
81 tryblock_info *tryblock; /* array of try blocks */
85 typedef void (*cxx_copy_ctor)(void);
87 /* complete information about a C++ type */
88 typedef struct __cxx_type_info
90 UINT flags; /* flags (see CLASS_* flags below) */
91 type_info *type_info; /* C++ type info */
92 int this_offset; /* offset of base class this pointer from start of object */
93 int vbase_descr; /* offset of virtual base class descriptor */
94 int vbase_offset; /* offset of this pointer offset in virtual base class descriptor */
95 size_t size; /* object size */
96 cxx_copy_ctor copy_ctor; /* copy constructor */
98 #define CLASS_IS_SIMPLE_TYPE 1
99 #define CLASS_HAS_VIRTUAL_BASE_CLASS 4
101 /* table of C++ types that apply for a given object */
102 typedef struct __cxx_type_info_table
104 UINT count; /* number of types */
105 const cxx_type_info *info[3]; /* variable length, we declare it large enough for static RTTI */
106 } cxx_type_info_table;
108 typedef DWORD (*cxx_exc_custom_handler)( PEXCEPTION_RECORD, cxx_exception_frame*,
109 PCONTEXT, EXCEPTION_REGISTRATION_RECORD**,
110 cxx_function_descr*, int nested_trylevel,
111 EXCEPTION_REGISTRATION_RECORD *nested_frame, DWORD unknown3 );
113 /* type information for an exception object */
114 typedef struct __cxx_exception_type
116 UINT flags; /* TYPE_FLAG flags */
117 void (*destructor)(); /* exception object destructor */
118 cxx_exc_custom_handler custom_handler; /* custom handler for this exception */
119 const cxx_type_info_table *type_info_table; /* list of types for this exception object */
120 } cxx_exception_type;
122 void _CxxThrowException(void*,const cxx_exception_type*);
124 #endif /* __MSVCRT_CPPEXCEPT_H */