295 lines
11 KiB
C
295 lines
11 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 <windef.h>
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#include <winternl.h>
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#include <excpt.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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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)
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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)
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*
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* The filter_func and finally_func functions must be defined like this:
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*
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* LONG CALLBACK filter_func( PEXCEPTION_POINTERS __eptr ) { ... }
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*
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* void CALLBACK finally_func( BOOL __normal ) { ... }
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*
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* The filter function must return one of the EXCEPTION_* code; it can
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* use GetExceptionInformation() and GetExceptionCode() to retrieve the
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* exception info.
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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, but avoid using them because they
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* won't work when compiling with native exceptions. You cannot use
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* 'return', 'goto', or 'longjmp' to leave a __TRY block either, as
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* this will surely crash. You can use 'return', 'goto', or 'longjmp'
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* to leave an __EXCEPT block though.
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*
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* -- AJ
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*/
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#if !defined(__GNUC__) && !defined(__clang__)
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#define __attribute__(x) /* nothing */
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#endif
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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 __EXCEPT_CTX(func, ctx) __except((func)(GetExceptionInformation(), ctx))
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#define __FINALLY(func) __finally { (func)(!AbnormalTermination()); }
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#define __FINALLY_CTX(func, ctx) __finally { (func)(!AbnormalTermination(), ctx); }
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#define __ENDTRY /*nothing*/
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#define __EXCEPT_PAGE_FAULT __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
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#define __EXCEPT_ALL __except(EXCEPTION_EXECUTE_HANDLER)
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#else /* USE_COMPILER_EXCEPTIONS */
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#ifdef __i386__
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typedef struct { int reg[16]; } __wine_jmp_buf;
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#elif defined(__x86_64__)
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typedef struct { DECLSPEC_ALIGN(16) struct { unsigned __int64 Part[2]; } reg[16]; } __wine_jmp_buf;
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#elif defined(__arm__)
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typedef struct { int reg[28]; } __wine_jmp_buf;
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#elif defined(__aarch64__)
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typedef struct { __int64 reg[24]; } __wine_jmp_buf;
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#else
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typedef struct { int reg; } __wine_jmp_buf;
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#endif
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extern int __cdecl __attribute__ ((__nothrow__,__returns_twice__)) __wine_setjmpex( __wine_jmp_buf *buf,
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EXCEPTION_REGISTRATION_RECORD *frame ) DECLSPEC_HIDDEN;
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extern void DECLSPEC_NORETURN __cdecl __wine_longjmp( __wine_jmp_buf *buf, int retval ) DECLSPEC_HIDDEN;
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extern void DECLSPEC_NORETURN __cdecl __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
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void (*target)(void) ) DECLSPEC_HIDDEN;
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extern DWORD __cdecl __wine_exception_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
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extern DWORD __cdecl __wine_exception_ctx_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
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extern DWORD __cdecl __wine_exception_handler_page_fault( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
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extern DWORD __cdecl __wine_exception_handler_all( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
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extern DWORD __cdecl __wine_finally_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
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extern DWORD __cdecl __wine_finally_ctx_handler( EXCEPTION_RECORD *record,
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EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context,
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EXCEPTION_REGISTRATION_RECORD **pdispatcher ) DECLSPEC_HIDDEN;
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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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if (__wine_setjmpex( &__f.jmp, &__f.frame )) { \
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const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
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do {
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#define __EXCEPT_CTX(func, context) \
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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_ctx_handler; \
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__f.u.filter_ctx = (func); \
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__f.ctx = context; \
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if (__wine_setjmpex( &__f.jmp, &__f.frame )) { \
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const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
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do {
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#define __EXCEPT_HANDLER(handler) \
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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 = (handler); \
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if (__wine_setjmpex( &__f.jmp, &__f.frame )) { \
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const __WINE_FRAME * const __eptr __attribute__((unused)) = &__f; \
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do {
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#define __EXCEPT_PAGE_FAULT __EXCEPT_HANDLER(__wine_exception_handler_page_fault)
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#define __EXCEPT_ALL __EXCEPT_HANDLER(__wine_exception_handler_all)
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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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__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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#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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#define __FINALLY_CTX(func, context) \
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} while(0); \
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__wine_pop_frame( &__f.frame ); \
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(func)(1, context); \
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break; \
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} else { \
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__f.frame.Handler = __wine_finally_ctx_handler; \
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__f.u.finally_func_ctx = (func); \
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__f.ctx = context; \
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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 LONG (CALLBACK *__WINE_FILTER_CTX)(PEXCEPTION_POINTERS, void*);
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typedef void (CALLBACK *__WINE_FINALLY)(BOOL);
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typedef void (CALLBACK *__WINE_FINALLY_CTX)(BOOL, void*);
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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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__WINE_FILTER_CTX filter_ctx;
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/* finally data */
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__WINE_FINALLY finally_func;
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__WINE_FINALLY_CTX finally_func_ctx;
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} u;
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void *ctx;
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__wine_jmp_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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#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 = teb->ExceptionList;
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teb->ExceptionList = 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 = frame->Prev;
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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_get_frame(void)
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{
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#if defined(__GNUC__) && defined(__i386__)
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EXCEPTION_REGISTRATION_RECORD *ret;
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__asm__ __volatile__(".byte 0x64\n\tmovl (0),%0" : "=r" (ret) );
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return ret;
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#else
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NT_TIB *teb = (NT_TIB *)NtCurrentTeb();
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return teb->ExceptionList;
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#endif
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __WINE_WINE_EXCEPTION_H */
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