Sweden-Number/dlls/msvcrt/cppexcept.h

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/*
* msvcrt C++ exception handling
*
* Copyright 2002 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef __MSVCRT_CPPEXCEPT_H
#define __MSVCRT_CPPEXCEPT_H
#include "wine/asm.h"
#define CXX_FRAME_MAGIC_VC6 0x19930520
#define CXX_FRAME_MAGIC_VC7 0x19930521
#define CXX_FRAME_MAGIC_VC8 0x19930522
#define CXX_EXCEPTION 0xe06d7363
#define FUNC_DESCR_SYNCHRONOUS 1 /* synchronous exceptions only (built with /EHs and /EHsc) */
#define FUNC_DESCR_NOEXCEPT 4 /* noexcept function */
typedef void (*vtable_ptr)(void);
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/* type_info object, see cpp.c for implementation */
typedef struct __type_info
{
const vtable_ptr *vtable;
char *name; /* Unmangled name, allocated lazily */
char mangled[64]; /* Variable length, but we declare it large enough for static RTTI */
} type_info;
/* exception object */
typedef struct __exception
{
const vtable_ptr *vtable;
char *name; /* Name of this exception, always a new copy for each object */
BOOL do_free; /* Whether to free 'name' in our dtor */
} exception;
typedef void (*cxx_copy_ctor)(void);
/* offsets for computing the this pointer */
typedef struct
{
int this_offset; /* offset of base class this pointer from start of object */
int vbase_descr; /* offset of virtual base class descriptor */
int vbase_offset; /* offset of this pointer offset in virtual base class descriptor */
} this_ptr_offsets;
/* complete information about a C++ type */
#ifndef __x86_64__
typedef struct __cxx_type_info
{
UINT flags; /* flags (see CLASS_* flags below) */
const type_info *type_info; /* C++ type info */
this_ptr_offsets offsets; /* offsets for computing the this pointer */
unsigned int size; /* object size */
cxx_copy_ctor copy_ctor; /* copy constructor */
} cxx_type_info;
#else
typedef struct __cxx_type_info
{
UINT flags;
unsigned int type_info;
this_ptr_offsets offsets;
unsigned int size;
unsigned int copy_ctor;
} cxx_type_info;
#endif
#define CLASS_IS_SIMPLE_TYPE 1
#define CLASS_HAS_VIRTUAL_BASE_CLASS 4
/* table of C++ types that apply for a given object */
#ifndef __x86_64__
typedef struct __cxx_type_info_table
{
UINT count; /* number of types */
const cxx_type_info *info[3]; /* variable length, we declare it large enough for static RTTI */
} cxx_type_info_table;
#else
typedef struct __cxx_type_info_table
{
UINT count;
unsigned int info[3];
} cxx_type_info_table;
#endif
struct __cxx_exception_frame;
struct __cxx_function_descr;
typedef 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 );
/* type information for an exception object */
#ifndef __x86_64__
typedef struct __cxx_exception_type
{
UINT flags; /* TYPE_FLAG flags */
void (*destructor)(void);/* exception object destructor */
cxx_exc_custom_handler custom_handler; /* custom handler for this exception */
const cxx_type_info_table *type_info_table; /* list of types for this exception object */
} cxx_exception_type;
#else
typedef struct
{
UINT flags;
unsigned int destructor;
unsigned int custom_handler;
unsigned int type_info_table;
} cxx_exception_type;
#endif
void WINAPI _CxxThrowException(void*,const cxx_exception_type*);
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int CDECL _XcptFilter(NTSTATUS, PEXCEPTION_POINTERS);
static inline const char *dbgstr_type_info( const type_info *info )
{
if (!info) return "{}";
return wine_dbg_sprintf( "{vtable=%p name=%s (%s)}",
info->vtable, info->mangled, info->name ? info->name : "" );
}
/* compute the this pointer for a base class of a given type */
static inline void *get_this_pointer( const this_ptr_offsets *off, void *object )
{
if (!object) return NULL;
if (off->vbase_descr >= 0)
{
int *offset_ptr;
/* move this ptr to vbase descriptor */
object = (char *)object + off->vbase_descr;
/* and fetch additional offset from vbase descriptor */
offset_ptr = (int *)(*(char **)object + off->vbase_offset);
object = (char *)object + *offset_ptr;
}
object = (char *)object + off->this_offset;
return object;
}
#ifndef __x86_64__
#define DEFINE_CXX_TYPE_INFO(type) \
static const cxx_type_info type ## _cxx_type_info = { \
0, \
& type ##_type_info, \
{ 0, -1, 0 }, \
sizeof(type), \
(cxx_copy_ctor)THISCALL(type ##_copy_ctor) \
};
#define DEFINE_CXX_EXCEPTION(type, base_no, cl1, cl2, dtor) \
static const cxx_type_info_table type ## _cxx_type_table = { \
base_no+1, \
{ \
& type ## _cxx_type_info, \
cl1, \
cl2, \
} \
}; \
\
static const cxx_exception_type type ## _exception_type = { \
0, \
(cxx_copy_ctor)THISCALL(dtor), \
NULL, \
& type ## _cxx_type_table \
};
#else
#define DEFINE_CXX_TYPE_INFO(type) \
static cxx_type_info type ## _cxx_type_info = { \
0, \
0xdeadbeef, \
{ 0, -1, 0 }, \
sizeof(type), \
0xdeadbeef \
}; \
\
static void init_ ## type ## _cxx_type_info(char *base) \
{ \
type ## _cxx_type_info.type_info = (char *)&type ## _type_info - base; \
type ## _cxx_type_info.copy_ctor = (char *)type ## _copy_ctor - base; \
}
#define DEFINE_CXX_EXCEPTION(type, base_no, cl1, cl2, dtor) \
static cxx_type_info_table type ## _cxx_type_table = { \
base_no+1, \
{ \
0xdeadbeef, \
0xdeadbeef, \
0xdeadbeef, \
} \
}; \
\
static cxx_exception_type type ##_exception_type = { \
0, \
0xdeadbeef, \
0, \
0xdeadbeef \
}; \
\
static void init_ ## type ## _cxx(char *base) \
{ \
init_ ## type ## _cxx_type_info(base); \
type ## _cxx_type_table.info[0] = (char *)&type ## _cxx_type_info - base; \
type ## _cxx_type_table.info[1] = (char *)cl1 - base; \
type ## _cxx_type_table.info[2] = (char *)cl2 - base; \
type ## _exception_type.destructor = (char *)dtor - base; \
type ## _exception_type.type_info_table = (char *)&type ## _cxx_type_table - base; \
}
#endif
#define DEFINE_CXX_DATA(type, base_no, cl1, cl2, dtor) \
DEFINE_CXX_TYPE_INFO(type) \
DEFINE_CXX_EXCEPTION(type, base_no, cl1, cl2, dtor)
#define DEFINE_CXX_EXCEPTION0(name, dtor) \
DEFINE_CXX_EXCEPTION(name, 0, NULL, NULL, dtor)
#define DEFINE_CXX_DATA0(name, dtor) \
DEFINE_CXX_DATA(name, 0, NULL, NULL, dtor)
#define DEFINE_CXX_DATA1(name, cl1, dtor) \
DEFINE_CXX_DATA(name, 1, cl1, NULL, dtor)
#define DEFINE_CXX_DATA2(name, cl1, cl2, dtor) \
DEFINE_CXX_DATA(name, 2, cl1, cl2, dtor)
#if _MSVCR_VER >= 80
#define EXCEPTION_MANGLED_NAME ".?AVexception@std@@"
#else
#define EXCEPTION_MANGLED_NAME ".?AVexception@@"
#endif
#define CREATE_EXCEPTION_OBJECT(exception_name) \
static exception* __exception_ctor(exception *this, const char *str, const vtable_ptr *vtbl) \
{ \
if (str) \
{ \
unsigned int len = strlen(str) + 1; \
this->name = malloc(len); \
memcpy(this->name, str, len); \
this->do_free = TRUE; \
} \
else \
{ \
this->name = NULL; \
this->do_free = FALSE; \
} \
this->vtable = vtbl; \
return this; \
} \
\
static exception* __exception_copy_ctor(exception *this, const exception *rhs, const vtable_ptr *vtbl) \
{ \
if (rhs->do_free) \
{ \
__exception_ctor(this, rhs->name, vtbl); \
} \
else \
{ \
*this = *rhs; \
this->vtable = vtbl; \
} \
return this; \
} \
extern const vtable_ptr exception_name ## _vtable; \
DEFINE_THISCALL_WRAPPER(exception_name ## _copy_ctor,8) \
exception* __thiscall exception_name ## _copy_ctor(exception *this, const exception *rhs) \
{ \
return __exception_copy_ctor(this, rhs, & exception_name ## _vtable); \
} \
\
DEFINE_THISCALL_WRAPPER(exception_name ## _dtor,4) \
void __thiscall exception_name ## _dtor(exception *this) \
{ \
if (this->do_free) free(this->name); \
} \
\
DEFINE_THISCALL_WRAPPER(exception_name ## _vector_dtor,8) \
void* __thiscall exception_name ## _vector_dtor(exception *this, unsigned int flags) \
{ \
if (flags & 2) \
{ \
INT_PTR i, *ptr = (INT_PTR *)this - 1; \
\
for (i = *ptr - 1; i >= 0; i--) exception_name ## _dtor(this + i); \
operator_delete(ptr); \
} \
else \
{ \
exception_name ## _dtor(this); \
if (flags & 1) operator_delete(this); \
} \
return this; \
} \
\
DEFINE_THISCALL_WRAPPER(exception_name ## _what,4) \
const char* __thiscall exception_name ## _what(exception *this) \
{ \
return this->name ? this->name : "Unknown exception"; \
} \
\
__ASM_BLOCK_BEGIN(exception_name ## _vtables) \
__ASM_VTABLE(exception_name, \
VTABLE_ADD_FUNC(exception_name ## _vector_dtor) \
VTABLE_ADD_FUNC(exception_name ## _what)); \
__ASM_BLOCK_END \
\
DEFINE_RTTI_DATA0(exception_name, 0, EXCEPTION_MANGLED_NAME) \
DEFINE_CXX_TYPE_INFO(exception_name)
#endif /* __MSVCRT_CPPEXCEPT_H */