204 lines
6.4 KiB
C
204 lines
6.4 KiB
C
/*
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* Wine exception handling
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*
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* Copyright (c) 1999 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __WINE_WINE_EXCEPTION_H
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#define __WINE_WINE_EXCEPTION_H
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#include <setjmp.h>
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#include <windef.h>
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/* The following definitions allow using exceptions in Wine and Winelib code
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*
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* They should be used like this:
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*
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* __TRY
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* {
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* do some stuff that can raise an exception
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* }
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* __EXCEPT(filter_func,param)
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* {
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* handle the exception here
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* }
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* __ENDTRY
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*
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* or
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*
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* __TRY
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* {
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* do some stuff that can raise an exception
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* }
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* __FINALLY(finally_func,param)
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*
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* The filter_func must be defined with the WINE_EXCEPTION_FILTER
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* macro, and return one of the EXCEPTION_* code; it can use
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* GetExceptionInformation and GetExceptionCode to retrieve the
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* exception info.
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*
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* The finally_func must be defined with the WINE_FINALLY_FUNC macro.
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*
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* Warning: inside a __TRY or __EXCEPT block, 'break' or 'continue' statements
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* break out of the current block. You cannot use 'return', 'goto'
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* or 'longjmp' to leave a __TRY block, as this will surely crash.
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* You can use them to leave a __EXCEPT block though.
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*
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* -- AJ
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*/
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/* Define this if you want to use your compiler built-in __try/__except support.
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* This is only useful when compiling to a native Windows binary, as the built-in
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* compiler exceptions will most certainly not work under Winelib.
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*/
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#ifdef USE_COMPILER_EXCEPTIONS
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#define __TRY __try
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#define __EXCEPT(func) __except((func)(GetExceptionInformation()))
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#define __FINALLY(func) __finally { (func)(!AbnormalTermination()); }
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#define __ENDTRY /*nothing*/
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#define __EXCEPT_PAGE_FAULT __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
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#else /* USE_COMPILER_EXCEPTIONS */
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#ifndef __GNUC__
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#define __attribute__(x) /* nothing */
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#endif
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#define __TRY \
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do { __WINE_FRAME __f; \
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int __first = 1; \
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for (;;) if (!__first) \
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{ \
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do {
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#define __EXCEPT(func) \
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} while(0); \
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__wine_pop_frame( &__f.frame ); \
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break; \
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} else { \
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__f.frame.Handler = __wine_exception_handler; \
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__f.u.filter = (func); \
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__wine_push_frame( &__f.frame ); \
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if (sigsetjmp( __f.jmp, 1 )) { \
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const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
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do {
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#define __ENDTRY \
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} while (0); \
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break; \
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} \
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__first = 0; \
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} \
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} while (0);
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#define __FINALLY(func) \
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} while(0); \
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__wine_pop_frame( &__f.frame ); \
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(func)(1); \
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break; \
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} else { \
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__f.frame.Handler = __wine_finally_handler; \
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__f.u.finally_func = (func); \
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__wine_push_frame( &__f.frame ); \
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__first = 0; \
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} \
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} while (0);
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typedef LONG (CALLBACK *__WINE_FILTER)(PEXCEPTION_POINTERS);
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typedef void (CALLBACK *__WINE_FINALLY)(BOOL);
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/* convenience handler for page fault exceptions */
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#define __EXCEPT_PAGE_FAULT __EXCEPT( (__WINE_FILTER)1 )
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#define WINE_EXCEPTION_FILTER(func) LONG WINAPI func( EXCEPTION_POINTERS *__eptr )
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#define WINE_FINALLY_FUNC(func) void WINAPI func( BOOL __normal )
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#define GetExceptionInformation() (__eptr)
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#define GetExceptionCode() (__eptr->ExceptionRecord->ExceptionCode)
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#define AbnormalTermination() (!__normal)
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typedef struct __tagWINE_FRAME
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{
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EXCEPTION_REGISTRATION_RECORD frame;
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union
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{
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/* exception data */
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__WINE_FILTER filter;
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/* finally data */
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__WINE_FINALLY finally_func;
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} u;
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sigjmp_buf jmp;
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/* hack to make GetExceptionCode() work in handler */
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DWORD ExceptionCode;
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const struct __tagWINE_FRAME *ExceptionRecord;
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} __WINE_FRAME;
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extern DWORD __wine_exception_handler( PEXCEPTION_RECORD record, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher );
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extern DWORD __wine_finally_handler( PEXCEPTION_RECORD record, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher );
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#endif /* USE_COMPILER_EXCEPTIONS */
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static inline EXCEPTION_REGISTRATION_RECORD *__wine_push_frame( EXCEPTION_REGISTRATION_RECORD *frame )
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{
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#if defined(__GNUC__) && defined(__i386__)
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EXCEPTION_REGISTRATION_RECORD *prev;
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__asm__ __volatile__(".byte 0x64\n\tmovl (0),%0"
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"\n\tmovl %0,(%1)"
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"\n\t.byte 0x64\n\tmovl %1,(0)"
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: "=&r" (prev) : "r" (frame) : "memory" );
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return prev;
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#else
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NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
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frame->Prev = (void *)teb->ExceptionList;
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teb->ExceptionList = (void *)frame;
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return frame->Prev;
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#endif
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}
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static inline EXCEPTION_REGISTRATION_RECORD *__wine_pop_frame( EXCEPTION_REGISTRATION_RECORD *frame )
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{
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#if defined(__GNUC__) && defined(__i386__)
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__asm__ __volatile__(".byte 0x64\n\tmovl %0,(0)"
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: : "r" (frame->Prev) : "memory" );
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return frame->Prev;
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#else
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NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
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teb->ExceptionList = (void *)frame->Prev;
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return frame->Prev;
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#endif
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}
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/* Wine-specific exceptions codes */
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#define EXCEPTION_WINE_STUB 0x80000100 /* stub entry point called */
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#define EXCEPTION_WINE_ASSERTION 0x80000101 /* assertion failed */
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/* unhandled return status from vm86 mode */
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#define EXCEPTION_VM86_INTx 0x80000110
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#define EXCEPTION_VM86_STI 0x80000111
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#define EXCEPTION_VM86_PICRETURN 0x80000112
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extern void __wine_enter_vm86( CONTEXT *context );
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#endif /* __WINE_WINE_EXCEPTION_H */
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