From 5f431cda4c0767a6c51120cdca47fb27c7dab40e Mon Sep 17 00:00:00 2001 From: Steven Edwards Date: Wed, 24 Dec 2003 23:21:22 +0000 Subject: [PATCH] Removed the old port of the __CxxFrameHandler svn path=/trunk/; revision=7220 --- reactos/lib/msvcrt/misc/cpp.c | 549 ---------------------------------- 1 file changed, 549 deletions(-) delete mode 100644 reactos/lib/msvcrt/misc/cpp.c diff --git a/reactos/lib/msvcrt/misc/cpp.c b/reactos/lib/msvcrt/misc/cpp.c deleted file mode 100644 index b538eb80216..00000000000 --- a/reactos/lib/msvcrt/misc/cpp.c +++ /dev/null @@ -1,549 +0,0 @@ -remove this file - - - -/* $Id: cpp.c,v 1.6 2003/12/24 23:20:08 sedwards Exp $ - * - * COPYRIGHT: See COPYING in the top level directory - * PROJECT: ReactOS C runtime - * FILE: cpp.c - * PURPOSE: C++ runtime - * NOTES: Copied from Wine and slightly adapted for ReactOS - * This is a derivative work compiled of work written and - * copyrighted by (at least): - * Alexandre Juliard - * Patrik Stridvall - * Dimitrie O. Paun - * Jon Griffiths - */ - -#include -#include -#include -#include -#include - -#define CXX_FRAME_MAGIC 0x19930520 -#define CXX_EXCEPTION 0xe06d7363 - -typedef void (*v_table_ptr)(); - -typedef struct __type_info -{ - v_table_ptr *vtable; - void *data; - char name[1]; -} type_info; - -/* the exception frame used by CxxFrameHandler */ -typedef struct __cxx_exception_frame -{ - EXCEPTION_REGISTRATION 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, PEXCEPTION_REGISTRATION*, - cxx_function_descr*, int nested_trylevel, - PEXCEPTION_REGISTRATION 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; - -/* ??1type_info@@UAE@XZ (MSVCRT.@) */ -void MSVCRT_type_info_dtor(type_info * _this) -{ - if (_this->data) - { - free(_this->data); - } -} - -static DWORD cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame, - PCONTEXT exc_context, PEXCEPTION_REGISTRATION* dispatch, - cxx_function_descr *descr, PEXCEPTION_REGISTRATION nested_frame, - int nested_trylevel, CONTEXT_X86 *context ); - -/* call a function with a given ebp */ -inline static void *call_ebp_func( void *func, void *ebp ) -{ - void *ret; - __asm__ __volatile__ ("pushl %%ebp; movl %2,%%ebp; call *%%eax; popl %%ebp" \ - : "=a" (ret) : "0" (func), "g" (ebp) : "ecx", "edx", "memory" ); - return ret; -} - -/* call a copy constructor */ -inline static void call_copy_ctor( void *func, void *this, void *src, int has_vbase ) -{ -#if 0 - TRACE( "calling copy ctor %p object %p src %p\n", func, this, src ); -#endif - if (has_vbase) - /* in that case copy ctor takes an extra bool indicating whether to copy the base class */ - __asm__ __volatile__("pushl $1; pushl %2; call *%0" - : : "r" (func), "c" (this), "g" (src) : "eax", "edx", "memory" ); - else - __asm__ __volatile__("pushl %2; call *%0" - : : "r" (func), "c" (this), "g" (src) : "eax", "edx", "memory" ); -} - -/* call the destructor of the exception object */ -inline static void call_dtor( void *func, void *object ) -{ - __asm__ __volatile__("call *%0" : : "r" (func), "c" (object) : "eax", "edx", "memory" ); -} - -#if 0 -static void dump_type( cxx_type_info *type ) -{ -#if 0 - 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 ); - 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 ); -#endif -} - -static void dump_exception_type( cxx_exception_type *type ) -{ -#if 0 - int i; - - DPRINTF( "exception type:\n" ); - DPRINTF( "flags %x destr %p handler %p type info %p\n", - type->flags, type->destructor, type->custom_handler, type->type_info_table ); - for (i = 0; i < type->type_info_table->count; i++) - { - DPRINTF( " %d: ", i ); - dump_type( type->type_info_table->info[i] ); - } -#endif -} - -static void dump_function_descr( cxx_function_descr *descr, cxx_exception_type *info ) -{ -#if 0 - int i, j; - - DPRINTF( "function descr:\n" ); - DPRINTF( "magic %x\n", descr->magic ); - DPRINTF( "unwind table: %p %d\n", descr->unwind_table, descr->unwind_count ); - for (i = 0; i < descr->unwind_count; i++) - { - DPRINTF( " %d: prev %d func %p\n", i, - descr->unwind_table[i].prev, descr->unwind_table[i].handler ); - } - DPRINTF( "try table: %p %d\n", descr->tryblock, descr->tryblock_count ); - for (i = 0; i < descr->tryblock_count; i++) - { - DPRINTF( " %d: start %d end %d catchlevel %d catch %p %d\n", i, - descr->tryblock[i].start_level, descr->tryblock[i].end_level, - descr->tryblock[i].catch_level, descr->tryblock[i].catchblock, - descr->tryblock[i].catchblock_count ); - for (j = 0; j < descr->tryblock[i].catchblock_count; j++) - { - 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 ); - DPRINTF( "\n" ); - } - } -#endif -} -#endif -/* compute the this pointer for a base class of a given type */ -static void *get_this_pointer( cxx_type_info *type, void *object ) -{ - void *this_ptr; - int *offset_ptr; - - if (!object) return NULL; - this_ptr = (char *)object + type->this_offset; - if (type->vbase_descr >= 0) - { - /* move this ptr to vbase descriptor */ - this_ptr = (char *)this_ptr + type->vbase_descr; - /* and fetch additional offset from vbase descriptor */ - offset_ptr = (int *)(*(char **)this_ptr + type->vbase_offset); - this_ptr = (char *)this_ptr + *offset_ptr; - } - return this_ptr; -} - -/* 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 ) -{ - UINT i; - - for (i = 0; i < exc_type->type_info_table->count; i++) - { - 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; - } - /* type is the same, now check the flags */ - if ((exc_type->flags & TYPE_FLAG_CONST) && - !(catchblock->flags & TYPE_FLAG_CONST)) continue; - if ((exc_type->flags & TYPE_FLAG_VOLATILE) && - !(catchblock->flags & TYPE_FLAG_VOLATILE)) continue; - return type; /* it matched */ - } - return NULL; -} - - -/* 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 ) -{ - void **dest_ptr; - - if (!catchblock->type_info || !catchblock->type_info->name[0]) return; - if (!catchblock->offset) return; - dest_ptr = (void **)((char *)&frame->ebp + catchblock->offset); - - if (catchblock->flags & TYPE_FLAG_REFERENCE) - { - *dest_ptr = get_this_pointer( type, object ); - } - else if (type->flags & CLASS_IS_SIMPLE_TYPE) - { - memmove( dest_ptr, object, type->size ); - /* if it is a pointer, adjust it */ - if (type->size == sizeof(void *)) *dest_ptr = get_this_pointer( type, *dest_ptr ); - } - else /* copy the object */ - { - if (type->copy_ctor) - call_copy_ctor( type->copy_ctor, dest_ptr, get_this_pointer(type,object), - (type->flags & CLASS_HAS_VIRTUAL_BASE_CLASS) ); - else - memmove( dest_ptr, get_this_pointer(type,object), type->size ); - } -} - -/* unwind the local function up to a given trylevel */ -static void cxx_local_unwind( cxx_exception_frame* frame, cxx_function_descr *descr, int last_level) -{ - void (*handler)(); - int trylevel = frame->trylevel; - - while (trylevel != last_level) - { - if (trylevel < 0 || trylevel >= descr->unwind_count) - { - OutputDebugStringA ( "invalid trylevel\n" ); - _exit(1); - } - handler = descr->unwind_table[trylevel].handler; - if (handler) - { -#if 0 - TRACE( "calling unwind handler %p trylevel %d last %d ebp %p\n", - handler, trylevel, last_level, &frame->ebp ); -#endif - call_ebp_func( handler, &frame->ebp ); - } - trylevel = descr->unwind_table[trylevel].prev; - } - frame->trylevel = last_level; -} - -/* exception frame for nested exceptions in catch block */ -struct catch_func_nested_frame -{ - EXCEPTION_REGISTRATION frame; /* standard exception frame */ - EXCEPTION_RECORD *prev_rec; /* previous record to restore in thread data */ - cxx_exception_frame *cxx_frame; /* frame of parent exception */ - cxx_function_descr *descr; /* descriptor of parent exception */ - int trylevel; /* current try level */ -}; - -/* handler for exceptions happening while calling a catch function */ -static EXCEPTION_DISPOSITION catch_function_nested_handler(PEXCEPTION_RECORD rec, - PEXCEPTION_REGISTRATION frame, - PCONTEXT context, - PVOID DispatcherContext) -{ - struct catch_func_nested_frame *nested_frame = (struct catch_func_nested_frame *)frame; - - if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) - { - GetThreadData()->exc_record = nested_frame->prev_rec; - return ExceptionContinueSearch; - } - else - { -#if 0 - TRACE( "got nested exception in catch function\n" ); -#endif - return cxx_frame_handler( rec, nested_frame->cxx_frame, context, - NULL, nested_frame->descr, &nested_frame->frame, - nested_frame->trylevel, context ); - } -} - -static inline PEXCEPTION_REGISTRATION __wine_push_frame( PEXCEPTION_REGISTRATION frame ) -{ -#if defined(__GNUC__) && defined(__i386__) - PEXCEPTION_REGISTRATION prev; - __asm__ __volatile__(".byte 0x64\n\tmovl (0),%0" - "\n\tmovl %0,(%1)" - "\n\t.byte 0x64\n\tmovl %1,(0)" - : "=&r" (prev) : "r" (frame) : "memory" ); - return prev; -#else - NT_TIB *teb = (NT_TIB *)NtCurrentTeb(); - frame->prev = (void *)teb->ExceptionList; - teb->ExceptionList = (void *)frame; - return frame->prev; -#endif -} - -static inline PEXCEPTION_REGISTRATION __wine_pop_frame( PEXCEPTION_REGISTRATION frame ) -{ -#if defined(__GNUC__) && defined(__i386__) - __asm__ __volatile__(".byte 0x64\n\tmovl %0,(0)" - : : "r" (frame->prev) : "memory" ); - return frame->prev; - -#else - NT_TIB *teb = (NT_TIB *)NtCurrentTeb(); - teb->ExceptionList = (void *)frame->prev; - return frame->prev; -#endif -} - -/* find and call the appropriate catch block for an exception */ -/* returns the address to continue execution to after the catch block was called */ -inline static void *call_catch_block( PEXCEPTION_RECORD rec, cxx_exception_frame *frame, - cxx_function_descr *descr, int nested_trylevel, - cxx_exception_type *info ) -{ - int i, j; - void *addr, *object = (void *)rec->ExceptionInformation[1]; - struct catch_func_nested_frame nested_frame; - int trylevel = frame->trylevel; - PTHREADDATA thread_data = GetThreadData(); - - for (i = 0; i < descr->tryblock_count; i++) - { - tryblock_info *tryblock = &descr->tryblock[i]; - - if (trylevel < tryblock->start_level) continue; - if (trylevel > tryblock->end_level) continue; - - /* got a try block */ - for (j = 0; j < tryblock->catchblock_count; j++) - { - catchblock_info *catchblock = &tryblock->catchblock[j]; - cxx_type_info *type = find_caught_type( info, catchblock ); - if (!type) continue; - -#if 0 - TRACE( "matched type %p in tryblock %d catchblock %d\n", type, i, j ); -#endif - - /* copy the exception to its destination on the stack */ - copy_exception( object, frame, catchblock, type ); - - /* unwind the stack */ - RtlUnwind( &(frame->frame), 0, rec, 0 ); - cxx_local_unwind( frame, descr, tryblock->start_level ); - frame->trylevel = tryblock->end_level + 1; - - /* call the catch block */ -#if 0 - TRACE( "calling catch block %p for type %p addr %p ebp %p\n", - catchblock, type, catchblock->handler, &frame->ebp ); -#endif - - /* setup an exception block for nested exceptions */ - - nested_frame.frame.handler = catch_function_nested_handler; - nested_frame.prev_rec = thread_data->exc_record; - nested_frame.cxx_frame = frame; - nested_frame.descr = descr; - nested_frame.trylevel = nested_trylevel + 1; - - __wine_push_frame( &nested_frame.frame ); - thread_data->exc_record = rec; - addr = call_ebp_func( catchblock->handler, &frame->ebp ); - thread_data->exc_record = nested_frame.prev_rec; - __wine_pop_frame( &nested_frame.frame ); - - if (info->destructor) call_dtor( info->destructor, object ); -#if 0 - TRACE( "done, continuing at %p\n", addr ); -#endif - return addr; - } - } - return NULL; -} - - -/********************************************************************* - * cxx_frame_handler - * - * Implementation of __CxxFrameHandler. - */ -static DWORD cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame, - PCONTEXT exc_context, PEXCEPTION_REGISTRATION* dispatch, - cxx_function_descr *descr, PEXCEPTION_REGISTRATION nested_frame, - int nested_trylevel, CONTEXT_X86 *context ) -{ - cxx_exception_type *exc_type; - void *next_ip; - - if (descr->magic != CXX_FRAME_MAGIC) - { - OutputDebugStringA ( "invalid frame magic\n" ); - return ExceptionContinueSearch; - } - if (rec->ExceptionFlags & (EH_UNWINDING|EH_EXIT_UNWIND)) - { - if (descr->unwind_count && !nested_trylevel) cxx_local_unwind( frame, descr, -1 ); - return ExceptionContinueSearch; - } - if (!descr->tryblock_count) return ExceptionContinueSearch; - - exc_type = (cxx_exception_type *)rec->ExceptionInformation[2]; - if (rec->ExceptionCode == CXX_EXCEPTION && - rec->ExceptionInformation[0] > CXX_FRAME_MAGIC && - exc_type->custom_handler) - { - return exc_type->custom_handler( rec, frame, exc_context, dispatch, - descr, nested_trylevel, nested_frame, 0 ); - } - - if (!exc_type) /* nested exception, fetch info from original exception */ - { - rec = GetThreadData()->exc_record; - exc_type = (cxx_exception_type *)rec->ExceptionInformation[2]; - } - -#if 0 - if (TRACE_ON(seh)) - { - TRACE("handling C++ exception rec %p frame %p trylevel %d descr %p nested_frame %p\n", - rec, frame, frame->trylevel, descr, nested_frame ); - dump_exception_type( exc_type ); - dump_function_descr( descr, exc_type ); - } -#endif - - next_ip = call_catch_block( rec, frame, descr, frame->trylevel, exc_type ); - - if (!next_ip) return ExceptionContinueSearch; - rec->ExceptionFlags &= ~EH_NONCONTINUABLE; - context->Eip = (DWORD)next_ip; - context->Ebp = (DWORD)&frame->ebp; - context->Esp = ((DWORD*)frame)[-1]; - return ExceptionContinueExecution; -} - - -/********************************************************************* - * __CxxFrameHandler (MSVCRT.@) - */ -void __CxxFrameHandler( PEXCEPTION_RECORD rec, PEXCEPTION_REGISTRATION frame, - PCONTEXT exc_context, PEXCEPTION_REGISTRATION* dispatch, - CONTEXT_X86 *context ) -{ - cxx_function_descr *descr = (cxx_function_descr *)context->Eax; - context->Eax = cxx_frame_handler( rec, (cxx_exception_frame *)frame, - exc_context, dispatch, descr, NULL, 0, context ); -} - -/********************************************************************* - * _CxxThrowException (MSVCRT.@) - */ -void _CxxThrowException( void *object, cxx_exception_type *type ) -{ - DWORD args[3]; - - args[0] = CXX_FRAME_MAGIC; - args[1] = (DWORD)object; - args[2] = (DWORD)type; - RaiseException( CXX_EXCEPTION, EH_NONCONTINUABLE, 3, args ); -} - -void MSVCRT_terminate(void) -{ - abort(); -}