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
28 /* The following definitions allow using exceptions in Wine and Winelib code
30 * They should be used like this:
34 * do some stuff that can raise an exception
36 * __EXCEPT(filter_func,param)
38 * handle the exception here
46 * do some stuff that can raise an exception
48 * __FINALLY(finally_func,param)
50 * The filter_func must be defined with the WINE_EXCEPTION_FILTER
51 * macro, and return one of the EXCEPTION_* code; it can use
52 * GetExceptionInformation and GetExceptionCode to retrieve the
55 * The finally_func must be defined with the WINE_FINALLY_FUNC macro.
57 * Warning: inside a __TRY or __EXCEPT block, 'break' or 'continue' statements
58 * break out of the current block. You cannot use 'return', 'goto'
59 * or 'longjmp' to leave a __TRY block, as this will surely crash.
60 * You can use them to leave a __EXCEPT block though.
65 /* Define this if you want to use your compiler built-in __try/__except support.
66 * This is only useful when compiling to a native Windows binary, as the built-in
67 * compiler exceptions will most certainly not work under Winelib.
69 #ifdef USE_COMPILER_EXCEPTIONS
72 #define __EXCEPT(func) __except((func)(GetExceptionInformation()))
73 #define __FINALLY(func) __finally { (func)(!AbnormalTermination()); }
74 #define __ENDTRY /*nothing*/
75 #define __EXCEPT_PAGE_FAULT __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
76 #define __EXCEPT_ALL __except(EXCEPTION_EXECUTE_HANDLER)
78 #else /* USE_COMPILER_EXCEPTIONS */
81 #define __attribute__(x) /* nothing */
84 #if defined(__MINGW32__) || defined(__CYGWIN__)
85 #define sigjmp_buf jmp_buf
86 #define sigsetjmp(buf,sigs) setjmp(buf)
87 #define siglongjmp(buf,val) longjmp(buf,val)
91 do { __WINE_FRAME __f; \
93 for (;;) if (!__first) \
97 #define __EXCEPT(func) \
99 __wine_pop_frame( &__f.frame ); \
102 __f.frame.Handler = __wine_exception_handler; \
103 __f.u.filter = (func); \
104 if (sigsetjmp( __f.jmp, 0 )) { \
105 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
108 /* convenience handler for page fault exceptions */
109 #define __EXCEPT_PAGE_FAULT \
111 __wine_pop_frame( &__f.frame ); \
114 __f.frame.Handler = __wine_exception_handler_page_fault; \
115 if (sigsetjmp( __f.jmp, 0 )) { \
116 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
119 /* convenience handler for all exception */
120 #define __EXCEPT_ALL \
122 __wine_pop_frame( &__f.frame ); \
125 __f.frame.Handler = __wine_exception_handler_all; \
126 if (sigsetjmp( __f.jmp, 0 )) { \
127 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
134 __wine_push_frame( &__f.frame ); \
139 #define __FINALLY(func) \
141 __wine_pop_frame( &__f.frame ); \
145 __f.frame.Handler = __wine_finally_handler; \
146 __f.u.finally_func = (func); \
147 __wine_push_frame( &__f.frame ); \
153 typedef LONG (CALLBACK *__WINE_FILTER)(PEXCEPTION_POINTERS);
154 typedef void (CALLBACK *__WINE_FINALLY)(BOOL);
156 #define GetExceptionInformation() (__eptr)
157 #define GetExceptionCode() (__eptr->ExceptionRecord->ExceptionCode)
158 #define AbnormalTermination() (!__normal)
160 typedef struct __tagWINE_FRAME
162 EXCEPTION_REGISTRATION_RECORD frame;
166 __WINE_FILTER filter;
168 __WINE_FINALLY finally_func;
171 /* hack to make GetExceptionCode() work in handler */
173 const struct __tagWINE_FRAME *ExceptionRecord;
176 #endif /* USE_COMPILER_EXCEPTIONS */
178 static inline EXCEPTION_REGISTRATION_RECORD *__wine_push_frame( EXCEPTION_REGISTRATION_RECORD *frame )
180 #if defined(__GNUC__) && defined(__i386__)
181 EXCEPTION_REGISTRATION_RECORD *prev;
182 __asm__ __volatile__(".byte 0x64\n\tmovl (0),%0"
184 "\n\t.byte 0x64\n\tmovl %1,(0)"
185 : "=&r" (prev) : "r" (frame) : "memory" );
188 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
189 frame->Prev = teb->ExceptionList;
190 teb->ExceptionList = frame;
195 static inline EXCEPTION_REGISTRATION_RECORD *__wine_pop_frame( EXCEPTION_REGISTRATION_RECORD *frame )
197 #if defined(__GNUC__) && defined(__i386__)
198 __asm__ __volatile__(".byte 0x64\n\tmovl %0,(0)"
199 : : "r" (frame->Prev) : "memory" );
203 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
204 teb->ExceptionList = frame->Prev;
209 /* Exception handling flags - from OS/2 2.0 exception handling */
211 /* Win32 seems to use the same flags as ExceptionFlags in an EXCEPTION_RECORD */
212 #define EH_NONCONTINUABLE 0x01
213 #define EH_UNWINDING 0x02
214 #define EH_EXIT_UNWIND 0x04
215 #define EH_STACK_INVALID 0x08
216 #define EH_NESTED_CALL 0x10
218 /* Wine-specific exceptions codes */
220 #define EXCEPTION_WINE_STUB 0x80000100 /* stub entry point called */
221 #define EXCEPTION_WINE_ASSERTION 0x80000101 /* assertion failed */
223 /* unhandled return status from vm86 mode */
224 #define EXCEPTION_VM86_INTx 0x80000110
225 #define EXCEPTION_VM86_STI 0x80000111
226 #define EXCEPTION_VM86_PICRETURN 0x80000112
228 extern void __wine_enter_vm86( CONTEXT *context );
230 #ifndef USE_COMPILER_EXCEPTIONS
232 extern void WINAPI RtlUnwind(PVOID,PVOID,PEXCEPTION_RECORD,PVOID);
234 /* wrapper for RtlUnwind since it clobbers registers on Windows */
235 static inline void __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record )
237 #if defined(__GNUC__) && defined(__i386__)
238 int dummy1, dummy2, dummy3;
239 __asm__ __volatile__("pushl %%ebp\n\t"
248 : "=a" (dummy1), "=S" (dummy2), "=D" (dummy3)
249 : "0" (RtlUnwind), "1" (frame), "2" (record)
250 : "ecx", "edx", "memory" );
252 RtlUnwind( frame, 0, record, 0 );
256 static inline void DECLSPEC_NORETURN __wine_unwind_frame( EXCEPTION_RECORD *record,
257 EXCEPTION_REGISTRATION_RECORD *frame )
259 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
261 /* hack to make GetExceptionCode() work in handler */
262 wine_frame->ExceptionCode = record->ExceptionCode;
263 wine_frame->ExceptionRecord = wine_frame;
265 __wine_rtl_unwind( frame, record );
266 __wine_pop_frame( frame );
267 siglongjmp( wine_frame->jmp, 1 );
270 static inline DWORD __wine_exception_handler( EXCEPTION_RECORD *record,
271 EXCEPTION_REGISTRATION_RECORD *frame,
273 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
275 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
276 EXCEPTION_POINTERS ptrs;
278 if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
279 return ExceptionContinueSearch;
281 ptrs.ExceptionRecord = record;
282 ptrs.ContextRecord = context;
283 switch(wine_frame->u.filter( &ptrs ))
285 case EXCEPTION_CONTINUE_SEARCH:
286 return ExceptionContinueSearch;
287 case EXCEPTION_CONTINUE_EXECUTION:
288 return ExceptionContinueExecution;
289 case EXCEPTION_EXECUTE_HANDLER:
292 __wine_unwind_frame( record, frame );
295 static inline DWORD __wine_exception_handler_page_fault( EXCEPTION_RECORD *record,
296 EXCEPTION_REGISTRATION_RECORD *frame,
298 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
300 if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
301 return ExceptionContinueSearch;
302 if (record->ExceptionCode != STATUS_ACCESS_VIOLATION)
303 return ExceptionContinueSearch;
304 __wine_unwind_frame( record, frame );
307 static inline DWORD __wine_exception_handler_all( EXCEPTION_RECORD *record,
308 EXCEPTION_REGISTRATION_RECORD *frame,
310 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
312 if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
313 return ExceptionContinueSearch;
314 __wine_unwind_frame( record, frame );
317 static inline DWORD __wine_finally_handler( EXCEPTION_RECORD *record,
318 EXCEPTION_REGISTRATION_RECORD *frame,
320 EXCEPTION_REGISTRATION_RECORD **pdispatcher )
322 if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
324 __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
325 wine_frame->u.finally_func( FALSE );
327 return ExceptionContinueSearch;
330 #endif /* USE_COMPILER_EXCEPTIONS */
332 #endif /* __WINE_WINE_EXCEPTION_H */