ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add __CxxDetectRethrow(), __CxxQueryExceptionSize(). 

Constify parameters (enabling static RTTI).
Move type definitions into a header for sharing with cpp.c objects.
This commit is contained in:
Jon Griffiths 2003-03-18 18:26:05 +00:00 committed by Alexandre Julliard
parent 49edd19650
commit c62c1c0158
2 changed files with 175 additions and 111 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

162
dlls/msvcrt/cppexcept.c
View File

@ -32,102 +32,10 @@
#include "excpt.h"
#include "wine/debug.h"
#include "cppexcept.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
#define CXX_FRAME_MAGIC 0x19930520
#define CXX_EXCEPTION 0xe06d7363
typedef struct __type_info
{
void *vtable;
void *data;
char name[1];
} type_info;
/* the exception frame used by CxxFrameHandler */
typedef struct __cxx_exception_frame
{
EXCEPTION_FRAME frame; /* the standard exception frame */
int trylevel;
DWORD ebp;
} cxx_exception_frame;
/* info about a single catch {} block */
typedef struct __catchblock_info
{
UINT flags; /* flags (see below) */
type_info *type_info; /* C++ type caught by this block */
int offset; /* stack offset to copy exception object to */
void (*handler)(); /* catch block handler code */
} catchblock_info;
#define TYPE_FLAG_CONST 1
#define TYPE_FLAG_VOLATILE 2
#define TYPE_FLAG_REFERENCE 8
/* info about a single try {} block */
typedef struct __tryblock_info
{
int start_level; /* start trylevel of that block */
int end_level; /* end trylevel of that block */
int catch_level; /* initial trylevel of the catch block */
int catchblock_count; /* count of catch blocks in array */
catchblock_info *catchblock; /* array of catch blocks */
} tryblock_info;
/* info about the unwind handler for a given trylevel */
typedef struct __unwind_info
{
int prev; /* prev trylevel unwind handler, to run after this one */
void (*handler)(); /* unwind handler */
} unwind_info;
/* descriptor of all try blocks of a given function */
typedef struct __cxx_function_descr
{
UINT magic; /* must be CXX_FRAME_MAGIC */
UINT unwind_count; /* number of unwind handlers */
unwind_info *unwind_table; /* array of unwind handlers */
UINT tryblock_count; /* number of try blocks */
tryblock_info *tryblock; /* array of try blocks */
UINT unknown[3];
} cxx_function_descr;
/* complete information about a C++ type */
typedef struct __cxx_type_info
{
UINT flags; /* flags (see CLASS_* flags below) */
type_info *type_info; /* C++ type info */
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 */
size_t size; /* object size */
void (*copy_ctor)(); /* copy constructor */
} cxx_type_info;
#define CLASS_IS_SIMPLE_TYPE 1
#define CLASS_HAS_VIRTUAL_BASE_CLASS 4
/* table of C++ types that apply for a given object */
typedef struct __cxx_type_info_table
{
UINT count; /* number of types */
cxx_type_info *info[1]; /* array of types */
} cxx_type_info_table;
typedef DWORD (*cxx_exc_custom_handler)( PEXCEPTION_RECORD, cxx_exception_frame*,
PCONTEXT, struct __EXCEPTION_FRAME**,
cxx_function_descr*, int nested_trylevel,
EXCEPTION_FRAME *nested_frame, DWORD unknown3 );
/* type information for an exception object */
typedef struct __cxx_exception_type
{
UINT flags; /* TYPE_FLAG flags */
void (*destructor)(); /* exception object destructor */
cxx_exc_custom_handler custom_handler; /* custom handler for this exception */
cxx_type_info_table *type_info_table; /* list of types for this exception object */
} cxx_exception_type;
#ifdef __i386__ /* CxxFrameHandler is not supported on non-i386 */
static DWORD cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame,
@ -163,18 +71,17 @@ inline static void call_dtor( void *func, void *object )
__asm__ __volatile__("call *%0" : : "r" (func), "c" (object) : "eax", "edx", "memory" );
}
static void dump_type( cxx_type_info *type )
static void dump_type( const cxx_type_info *type )
{
DPRINTF( "flags %x type %p", type->flags, type->type_info );
if (type->type_info) DPRINTF( " (%p %s)", type->type_info->data, type->type_info->name );
if (type->type_info) DPRINTF( " (%p %s)", type->type_info->name, type->type_info->mangled );
DPRINTF( " offset %d vbase %d,%d size %d copy ctor %p\n", type->this_offset,
type->vbase_descr, type->vbase_offset, type->size, type->copy_ctor );
}
static void dump_exception_type( cxx_exception_type *type )
static void dump_exception_type( const cxx_exception_type *type )
{
int i;
UINT i;
DPRINTF( "exception type:\n" );
DPRINTF( "flags %x destr %p handler %p type info %p\n",
@ -186,9 +93,10 @@ static void dump_exception_type( cxx_exception_type *type )
}
}
static void dump_function_descr( cxx_function_descr *descr, cxx_exception_type *info )
static void dump_function_descr( const cxx_function_descr *descr, const cxx_exception_type *info )
{
int i, j;
UINT i;
int j;
DPRINTF( "function descr:\n" );
DPRINTF( "magic %x\n", descr->magic );
@ -210,14 +118,14 @@ static void dump_function_descr( cxx_function_descr *descr, cxx_exception_type *
catchblock_info *ptr = &descr->tryblock[i].catchblock[j];
DPRINTF( " %d: flags %x offset %d handler %p type %p",
j, ptr->flags, ptr->offset, ptr->handler, ptr->type_info );
if (ptr->type_info) DPRINTF( " (%p %s)", ptr->type_info->data, ptr->type_info->name );
if (ptr->type_info) DPRINTF( " (%p %s)", ptr->type_info->name, ptr->type_info->mangled );
DPRINTF( "\n" );
}
}
}
/* compute the this pointer for a base class of a given type */
static void *get_this_pointer( cxx_type_info *type, void *object )
static void *get_this_pointer( const cxx_type_info *type, void *object )
{
void *this_ptr;
int *offset_ptr;
@ -236,18 +144,18 @@ static void *get_this_pointer( cxx_type_info *type, void *object )
}
/* check if the exception type is caught by a given catch block, and return the type that matched */
static cxx_type_info *find_caught_type( cxx_exception_type *exc_type, catchblock_info *catchblock )
static const cxx_type_info *find_caught_type( cxx_exception_type *exc_type, catchblock_info *catchblock )
{
UINT i;
for (i = 0; i < exc_type->type_info_table->count; i++)
{
cxx_type_info *type = exc_type->type_info_table->info[i];
const cxx_type_info *type = exc_type->type_info_table->info[i];
if (!catchblock->type_info) return type; /* catch(...) matches any type */
if (catchblock->type_info != type->type_info)
{
if (strcmp( catchblock->type_info->name, type->type_info->name )) continue;
if (strcmp( catchblock->type_info->mangled, type->type_info->mangled )) continue;
}
/* type is the same, now check the flags */
if ((exc_type->flags & TYPE_FLAG_CONST) &&
@ -262,11 +170,11 @@ static cxx_type_info *find_caught_type( cxx_exception_type *exc_type, catchblock
/* copy the exception object where the catch block wants it */
static void copy_exception( void *object, cxx_exception_frame *frame,
catchblock_info *catchblock, cxx_type_info *type )
catchblock_info *catchblock, const cxx_type_info *type )
{
void **dest_ptr;
if (!catchblock->type_info || !catchblock->type_info->name[0]) return;
if (!catchblock->type_info || !catchblock->type_info->mangled[0]) return;
if (!catchblock->offset) return;
dest_ptr = (void **)((char *)&frame->ebp + catchblock->offset);
@ -351,7 +259,8 @@ inline static void *call_catch_block( PEXCEPTION_RECORD rec, cxx_exception_frame
cxx_function_descr *descr, int nested_trylevel,
cxx_exception_type *info )
{
int i, j;
UINT i;
int j;
void *addr, *object = (void *)rec->ExceptionInformation[1];
struct catch_func_nested_frame nested_frame;
int trylevel = frame->trylevel;
@ -368,7 +277,7 @@ inline static void *call_catch_block( PEXCEPTION_RECORD rec, cxx_exception_frame
for (j = 0; j < tryblock->catchblock_count; j++)
{
catchblock_info *catchblock = &tryblock->catchblock[j];
cxx_type_info *type = find_caught_type( info, catchblock );
const cxx_type_info *type = find_caught_type( info, catchblock );
if (!type) continue;
TRACE( "matched type %p in tryblock %d catchblock %d\n", type, i, j );
@ -484,7 +393,7 @@ void __CxxFrameHandler( PEXCEPTION_RECORD rec, EXCEPTION_FRAME* frame,
/*********************************************************************
* _CxxThrowException (MSVCRT.@)
*/
void _CxxThrowException( void *object, cxx_exception_type *type )
void _CxxThrowException( void *object, const cxx_exception_type *type )
{
DWORD args[3];
@ -493,3 +402,34 @@ void _CxxThrowException( void *object, cxx_exception_type *type )
args[2] = (DWORD)type;
RaiseException( CXX_EXCEPTION, EH_NONCONTINUABLE, 3, args );
}
/*********************************************************************
* __CxxDetectRethrow (MSVCRT.@)
*/
BOOL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs)
{
PEXCEPTION_RECORD rec;
if (!ptrs)
return FALSE;
rec = ptrs->ExceptionRecord;
if (rec->ExceptionCode == CXX_EXCEPTION &&
rec->NumberParameters == 3 &&
rec->ExceptionInformation[0] == CXX_FRAME_MAGIC &&
rec->ExceptionInformation[2])
{
ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record;
return TRUE;
}
return (msvcrt_get_thread_data()->exc_record == rec);
}
/*********************************************************************
* __CxxQueryExceptionSize (MSVCRT.@)
*/
unsigned int __CxxQueryExceptionSize(void)
{
return sizeof(cxx_exception_type);
}

124
dlls/msvcrt/cppexcept.h Normal file
View File

@ -0,0 +1,124 @@
/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __MSVCRT_CPPEXCEPT_H
#define __MSVCRT_CPPEXCEPT_H
#define CXX_FRAME_MAGIC 0x19930520
#define CXX_EXCEPTION 0xe06d7363
typedef void (*vtable_ptr)();
/* type_info object, see cpp.c for inplementation */
typedef struct __type_info
{
vtable_ptr *vtable;
char *name; /* Unmangled name, allocated lazily */
char mangled[32]; /* Variable length, but we declare it large enough for static RTTI */
} type_info;
/* the exception frame used by CxxFrameHandler */
typedef struct __cxx_exception_frame
{
EXCEPTION_FRAME frame; /* the standard exception frame */
int trylevel;
DWORD ebp;
} cxx_exception_frame;
/* info about a single catch {} block */
typedef struct __catchblock_info
{
UINT flags; /* flags (see below) */
type_info *type_info; /* C++ type caught by this block */
int offset; /* stack offset to copy exception object to */
void (*handler)(); /* catch block handler code */
} catchblock_info;
#define TYPE_FLAG_CONST 1
#define TYPE_FLAG_VOLATILE 2
#define TYPE_FLAG_REFERENCE 8
/* info about a single try {} block */
typedef struct __tryblock_info
{
int start_level; /* start trylevel of that block */
int end_level; /* end trylevel of that block */
int catch_level; /* initial trylevel of the catch block */
int catchblock_count; /* count of catch blocks in array */
catchblock_info *catchblock; /* array of catch blocks */
} tryblock_info;
/* info about the unwind handler for a given trylevel */
typedef struct __unwind_info
{
int prev; /* prev trylevel unwind handler, to run after this one */
void (*handler)(); /* unwind handler */
} unwind_info;
/* descriptor of all try blocks of a given function */
typedef struct __cxx_function_descr
{
UINT magic; /* must be CXX_FRAME_MAGIC */
UINT unwind_count; /* number of unwind handlers */
unwind_info *unwind_table; /* array of unwind handlers */
UINT tryblock_count; /* number of try blocks */
tryblock_info *tryblock; /* array of try blocks */
UINT unknown[3];
} cxx_function_descr;
typedef void (*cxx_copy_ctor)(void);
/* complete information about a C++ type */
typedef struct __cxx_type_info
{
UINT flags; /* flags (see CLASS_* flags below) */
type_info *type_info; /* C++ type info */
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 */
size_t size; /* object size */
cxx_copy_ctor copy_ctor; /* copy constructor */
} cxx_type_info;
#define CLASS_IS_SIMPLE_TYPE 1
#define CLASS_HAS_VIRTUAL_BASE_CLASS 4
/* table of C++ types that apply for a given object */
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;
typedef DWORD (*cxx_exc_custom_handler)( PEXCEPTION_RECORD, cxx_exception_frame*,
PCONTEXT, struct __EXCEPTION_FRAME**,
cxx_function_descr*, int nested_trylevel,
EXCEPTION_FRAME *nested_frame, DWORD unknown3 );
/* type information for an exception object */
typedef struct __cxx_exception_type
{
UINT flags; /* TYPE_FLAG flags */
void (*destructor)(); /* 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;
void _CxxThrowException(void*,const cxx_exception_type*);
#endif /* __MSVCRT_CPPEXCEPT_H */