2 * Wine exception handling
4 * Copyright (c) 1999 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 #ifndef __WINE_WINE_EXCEPTION_H
22 #define __WINE_WINE_EXCEPTION_H
27 /* The following definitions allow using exceptions in Wine and Winelib code
29 * They should be used like this:
33 * do some stuff that can raise an exception
35 * __EXCEPT(filter_func,param)
37 * handle the exception here
45 * do some stuff that can raise an exception
47 * __FINALLY(finally_func,param)
49 * The filter_func must be defined with the WINE_EXCEPTION_FILTER
50 * macro, and return one of the EXCEPTION_* code; it can use
51 * GetExceptionInformation and GetExceptionCode to retrieve the
54 * The finally_func must be defined with the WINE_FINALLY_FUNC macro.
56 * Warning: inside a __TRY or __EXCEPT block, 'break' or 'continue' statements
57 * break out of the current block. You cannot use 'return', 'goto'
58 * or 'longjmp' to leave a __TRY block, as this will surely crash.
59 * You can use them to leave a __EXCEPT block though.
64 /* Define this if you want to use your compiler built-in __try/__except support.
65 * This is only useful when compiling to a native Windows binary, as the built-in
66 * compiler exceptions will most certainly not work under Winelib.
68 #ifdef USE_COMPILER_EXCEPTIONS
71 #define __EXCEPT(func) __except((func)(GetExceptionInformation()))
72 #define __FINALLY(func) __finally { (func)(!AbnormalTermination()); }
73 #define __ENDTRY /*nothing*/
74 #define __EXCEPT_PAGE_FAULT __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
76 #else /* USE_COMPILER_EXCEPTIONS */
79 #define __attribute__(x) /* nothing */
83 do { __WINE_FRAME __f; \
85 for (;;) if (!__first) \
89 #define __EXCEPT(func) \
91 __wine_pop_frame( &__f.frame ); \
94 __f.frame.Handler = __wine_exception_handler; \
95 __f.u.filter = (func); \
96 __wine_push_frame( &__f.frame ); \
97 if (sigsetjmp( __f.jmp, 1 )) { \
98 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
109 #define __FINALLY(func) \
111 __wine_pop_frame( &__f.frame ); \
115 __f.frame.Handler = __wine_finally_handler; \
116 __f.u.finally_func = (func); \
117 __wine_push_frame( &__f.frame ); \
123 typedef LONG (CALLBACK *__WINE_FILTER)(PEXCEPTION_POINTERS);
124 typedef void (CALLBACK *__WINE_FINALLY)(BOOL);
126 /* convenience handler for page fault exceptions */
127 #define __EXCEPT_PAGE_FAULT __EXCEPT( (__WINE_FILTER)1 )
129 #define WINE_EXCEPTION_FILTER(func) LONG WINAPI func( EXCEPTION_POINTERS *__eptr )
130 #define WINE_FINALLY_FUNC(func) void WINAPI func( BOOL __normal )
132 #define GetExceptionInformation() (__eptr)
133 #define GetExceptionCode() (__eptr->ExceptionRecord->ExceptionCode)
134 #define AbnormalTermination() (!__normal)
136 typedef struct __tagWINE_FRAME
138 EXCEPTION_REGISTRATION_RECORD frame;
142 __WINE_FILTER filter;
144 __WINE_FINALLY finally_func;
147 /* hack to make GetExceptionCode() work in handler */
149 const struct __tagWINE_FRAME *ExceptionRecord;
152 extern DWORD __wine_exception_handler( PEXCEPTION_RECORD record, EXCEPTION_REGISTRATION_RECORD *frame,
153 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher );
154 extern DWORD __wine_finally_handler( PEXCEPTION_RECORD record, EXCEPTION_REGISTRATION_RECORD *frame,
155 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher );
157 #endif /* USE_COMPILER_EXCEPTIONS */
159 static inline EXCEPTION_REGISTRATION_RECORD *__wine_push_frame( EXCEPTION_REGISTRATION_RECORD *frame )
161 #if defined(__GNUC__) && defined(__i386__)
162 EXCEPTION_REGISTRATION_RECORD *prev;
163 __asm__ __volatile__(".byte 0x64\n\tmovl (0),%0"
165 "\n\t.byte 0x64\n\tmovl %1,(0)"
166 : "=&r" (prev) : "r" (frame) : "memory" );
169 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
170 frame->Prev = (void *)teb->ExceptionList;
171 teb->ExceptionList = (void *)frame;
176 static inline EXCEPTION_REGISTRATION_RECORD *__wine_pop_frame( EXCEPTION_REGISTRATION_RECORD *frame )
178 #if defined(__GNUC__) && defined(__i386__)
179 __asm__ __volatile__(".byte 0x64\n\tmovl %0,(0)"
180 : : "r" (frame->Prev) : "memory" );
184 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
185 teb->ExceptionList = (void *)frame->Prev;
191 /* Wine-specific exceptions codes */
193 #define EXCEPTION_WINE_STUB 0x80000100 /* stub entry point called */
194 #define EXCEPTION_WINE_ASSERTION 0x80000101 /* assertion failed */
196 /* unhandled return status from vm86 mode */
197 #define EXCEPTION_VM86_INTx 0x80000110
198 #define EXCEPTION_VM86_STI 0x80000111
199 #define EXCEPTION_VM86_PICRETURN 0x80000112
201 extern void __wine_enter_vm86( CONTEXT *context );
203 #endif /* __WINE_WINE_EXCEPTION_H */