diff --git a/dlls/msvcrt/cppexcept.c b/dlls/msvcrt/cppexcept.c index 851e5f1a0a7..b0437f7217d 100644 --- a/dlls/msvcrt/cppexcept.c +++ b/dlls/msvcrt/cppexcept.c @@ -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); +} diff --git a/dlls/msvcrt/cppexcept.h b/dlls/msvcrt/cppexcept.h new file mode 100644 index 00000000000..4d2213c9980 --- /dev/null +++ b/dlls/msvcrt/cppexcept.h @@ -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 */