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
32 /* The following definitions allow using exceptions in Wine and Winelib code
34 * They should be used like this:
38 * do some stuff that can raise an exception
40 * __EXCEPT(filter_func)
42 * handle the exception here
50 * do some stuff that can raise an exception
52 * __FINALLY(finally_func)
54 * The filter_func and finally_func functions must be defined like this:
56 * LONG CALLBACK filter_func( PEXCEPTION_POINTERS __eptr ) { ... }
58 * void CALLBACK finally_func( BOOL __normal ) { ... }
60 * The filter function must return one of the EXCEPTION_* code; it can
61 * use GetExceptionInformation() and GetExceptionCode() to retrieve the
64 * Warning: inside a __TRY or __EXCEPT block, 'break' or 'continue' statements
65 * break out of the current block. You cannot use 'return', 'goto'
66 * or 'longjmp' to leave a __TRY block, as this will surely crash.
67 * You can use them to leave a __EXCEPT block though.
72 /* Define this if you want to use your compiler built-in __try/__except support.
73 * This is only useful when compiling to a native Windows binary, as the built-in
74 * compiler exceptions will most certainly not work under Winelib.
76 #ifdef USE_COMPILER_EXCEPTIONS
79 #define __EXCEPT(func) __except((func)(GetExceptionInformation()))
80 #define __FINALLY(func) __finally { (func)(!AbnormalTermination()); }
81 #define __ENDTRY /*nothing*/
82 #define __EXCEPT_PAGE_FAULT __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
83 #define __EXCEPT_ALL __except(EXCEPTION_EXECUTE_HANDLER)
85 #else /* USE_COMPILER_EXCEPTIONS */
88 #define __attribute__(x) /* nothing */
91 #if defined(__MINGW32__) || defined(__CYGWIN__)
92 #define sigjmp_buf jmp_buf
93 #define sigsetjmp(buf,sigs) setjmp(buf)
94 #define siglongjmp(buf,val) longjmp(buf,val)
97 extern void __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
98 void (*target)(void) ) DECLSPEC_HIDDEN DECLSPEC_NORETURN;
99 extern DWORD __wine_exception_handler( EXCEPTION_RECORD *record,
100 EXCEPTION_REGISTRATION_RECORD *frame,
102 EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
103 extern DWORD __wine_exception_handler_page_fault( EXCEPTION_RECORD *record,
104 EXCEPTION_REGISTRATION_RECORD *frame,
106 EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
107 extern DWORD __wine_exception_handler_all( EXCEPTION_RECORD *record,
108 EXCEPTION_REGISTRATION_RECORD *frame,
110 EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
111 extern DWORD __wine_finally_handler( EXCEPTION_RECORD *record,
112 EXCEPTION_REGISTRATION_RECORD *frame,
114 EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
117 do { __WINE_FRAME __f; \
119 for (;;) if (!__first) \
123 #define __EXCEPT(func) \
125 __wine_pop_frame( &__f.frame ); \
128 __f.frame.Handler = __wine_exception_handler; \
129 __f.u.filter = (func); \
130 if (sigsetjmp( __f.jmp, 0 )) { \
131 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
134 /* convenience handler for page fault exceptions */
135 #define __EXCEPT_PAGE_FAULT \
137 __wine_pop_frame( &__f.frame ); \
140 __f.frame.Handler = __wine_exception_handler_page_fault; \
141 if (sigsetjmp( __f.jmp, 0 )) { \
142 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
145 /* convenience handler for all exception */
146 #define __EXCEPT_ALL \
148 __wine_pop_frame( &__f.frame ); \
151 __f.frame.Handler = __wine_exception_handler_all; \
152 if (sigsetjmp( __f.jmp, 0 )) { \
153 const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
160 __wine_push_frame( &__f.frame ); \
165 #define __FINALLY(func) \
167 __wine_pop_frame( &__f.frame ); \
171 __f.frame.Handler = __wine_finally_handler; \
172 __f.u.finally_func = (func); \
173 __wine_push_frame( &__f.frame ); \
179 typedef LONG (CALLBACK *__WINE_FILTER)(PEXCEPTION_POINTERS);
180 typedef void (CALLBACK *__WINE_FINALLY)(BOOL);
182 #define GetExceptionInformation() (__eptr)
183 #define GetExceptionCode() (__eptr->ExceptionRecord->ExceptionCode)
184 #define AbnormalTermination() (!__normal)
186 typedef struct __tagWINE_FRAME
188 EXCEPTION_REGISTRATION_RECORD frame;
192 __WINE_FILTER filter;
194 __WINE_FINALLY finally_func;
197 /* hack to make GetExceptionCode() work in handler */
199 const struct __tagWINE_FRAME *ExceptionRecord;
202 #endif /* USE_COMPILER_EXCEPTIONS */
204 static inline EXCEPTION_REGISTRATION_RECORD *__wine_push_frame( EXCEPTION_REGISTRATION_RECORD *frame )
206 #if defined(__GNUC__) && defined(__i386__)
207 EXCEPTION_REGISTRATION_RECORD *prev;
208 __asm__ __volatile__(".byte 0x64\n\tmovl (0),%0"
210 "\n\t.byte 0x64\n\tmovl %1,(0)"
211 : "=&r" (prev) : "r" (frame) : "memory" );
214 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
215 frame->Prev = teb->ExceptionList;
216 teb->ExceptionList = frame;
221 static inline EXCEPTION_REGISTRATION_RECORD *__wine_pop_frame( EXCEPTION_REGISTRATION_RECORD *frame )
223 #if defined(__GNUC__) && defined(__i386__)
224 __asm__ __volatile__(".byte 0x64\n\tmovl %0,(0)"
225 : : "r" (frame->Prev) : "memory" );
229 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
230 teb->ExceptionList = frame->Prev;
235 static inline EXCEPTION_REGISTRATION_RECORD *__wine_get_frame(void)
237 #if defined(__GNUC__) && defined(__i386__)
238 EXCEPTION_REGISTRATION_RECORD *ret;
239 __asm__ __volatile__(".byte 0x64\n\tmovl (0),%0" : "=r" (ret) );
242 NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
243 return teb->ExceptionList;
247 /* Exception handling flags - from OS/2 2.0 exception handling */
249 /* Win32 seems to use the same flags as ExceptionFlags in an EXCEPTION_RECORD */
250 #define EH_NONCONTINUABLE 0x01
251 #define EH_UNWINDING 0x02
252 #define EH_EXIT_UNWIND 0x04
253 #define EH_STACK_INVALID 0x08
254 #define EH_NESTED_CALL 0x10
256 /* Wine-specific exceptions codes */
258 #define EXCEPTION_WINE_STUB 0x80000100 /* stub entry point called */
259 #define EXCEPTION_WINE_ASSERTION 0x80000101 /* assertion failed */
261 /* unhandled return status from vm86 mode */
262 #define EXCEPTION_VM86_INTx 0x80000110
263 #define EXCEPTION_VM86_STI 0x80000111
264 #define EXCEPTION_VM86_PICRETURN 0x80000112
266 extern void __wine_enter_vm86( CONTEXT *context );
272 #endif /* __WINE_WINE_EXCEPTION_H */