/*
* NT exception handling routines
- *
+ *
* Copyright 1999 Turchanov Sergey
* Copyright 1999 Alexandre Julliard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include "debugtools.h"
-#include "winnt.h"
-#include "ntddk.h"
-#include "except.h"
-#include "stackframe.h"
+#include "config.h"
+#include "wine/port.h"
-DEFAULT_DEBUG_CHANNEL(seh)
+#include <assert.h>
+#include <signal.h>
+#include <stdarg.h>
+
+#include "ntstatus.h"
+#include "windef.h"
+#include "winternl.h"
+#include "wine/exception.h"
+#include "wine/server.h"
+#include "wine/list.h"
+#include "wine/debug.h"
+#include "excpt.h"
+#include "ntdll_misc.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(seh);
/* Exception record for handling exceptions happening inside exception handlers */
typedef struct
{
- EXCEPTION_FRAME frame;
- EXCEPTION_FRAME *prevFrame;
+ EXCEPTION_REGISTRATION_RECORD frame;
+ EXCEPTION_REGISTRATION_RECORD *prevFrame;
} EXC_NESTED_FRAME;
+typedef struct
+{
+ struct list entry;
+ PVECTORED_EXCEPTION_HANDLER func;
+} VECTORED_HANDLER;
+
+static struct list vectored_handlers = LIST_INIT(vectored_handlers);
+
+static RTL_CRITICAL_SECTION vectored_handlers_section;
+static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
+{
+ 0, 0, &vectored_handlers_section,
+ { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
+ 0, 0, { 0, (DWORD)(__FILE__ ": vectored_handlers_section") }
+};
+static RTL_CRITICAL_SECTION vectored_handlers_section = { &critsect_debug, -1, 0, 0, 0, 0 };
+
+#ifdef __i386__
+# define GET_IP(context) ((LPVOID)(context)->Eip)
+#elif defined(__sparc__)
+# define GET_IP(context) ((LPVOID)(context)->pc)
+#elif defined(__powerpc__)
+# define GET_IP(context) ((LPVOID)(context)->Iar)
+#elif defined(__ALPHA__)
+# define GET_IP(context) ((LPVOID)(context)->Fir)
+#else
+# error You must define GET_IP for this CPU
+#endif
+
/*******************************************************************
* EXC_RaiseHandler
*
* Handler for exceptions happening inside a handler.
*/
-static DWORD CALLBACK EXC_RaiseHandler( EXCEPTION_RECORD *rec, EXCEPTION_FRAME *frame,
- CONTEXT *context, EXCEPTION_FRAME **dispatcher )
+static DWORD EXC_RaiseHandler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
+ CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
return ExceptionContinueSearch;
*
* Handler for exceptions happening inside an unwind handler.
*/
-static DWORD CALLBACK EXC_UnwindHandler( EXCEPTION_RECORD *rec, EXCEPTION_FRAME *frame,
- CONTEXT *context, EXCEPTION_FRAME **dispatcher )
+static DWORD EXC_UnwindHandler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
+ CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
return ExceptionContinueSearch;
*
* Call an exception handler, setting up an exception frame to catch exceptions
* happening during the handler execution.
+ * Please do not change the first 4 parameters order in any way - some exceptions handlers
+ * rely on Base Pointer (EBP) to have a fixed position related to the exception frame
*/
-static DWORD EXC_CallHandler( PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler,
- EXCEPTION_RECORD *record, EXCEPTION_FRAME *frame,
- CONTEXT *context, EXCEPTION_FRAME **dispatcher )
+static DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
+ CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
+ PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler)
{
EXC_NESTED_FRAME newframe;
DWORD ret;
newframe.frame.Handler = nested_handler;
newframe.prevFrame = frame;
- EXC_push_frame( &newframe.frame );
- TRACE( "calling handler at %p\n", handler );
+ __wine_push_frame( &newframe.frame );
+ TRACE( "calling handler at %p code=%lx flags=%lx\n",
+ handler, record->ExceptionCode, record->ExceptionFlags );
ret = handler( record, frame, context, dispatcher );
TRACE( "handler returned %lx\n", ret );
- EXC_pop_frame( &newframe.frame );
+ __wine_pop_frame( &newframe.frame );
+ return ret;
+}
+
+
+/**********************************************************************
+ * send_debug_event
+ *
+ * Send an EXCEPTION_DEBUG_EVENT event to the debugger.
+ */
+static int send_debug_event( EXCEPTION_RECORD *rec, int first_chance, CONTEXT *context )
+{
+ int ret;
+ HANDLE handle = 0;
+
+ if (!NtCurrentTeb()->Peb->BeingDebugged) return 0; /* no debugger present */
+
+ SERVER_START_REQ( queue_exception_event )
+ {
+ req->first = first_chance;
+ wine_server_add_data( req, context, sizeof(*context) );
+ wine_server_add_data( req, rec, sizeof(*rec) );
+ if (!wine_server_call( req )) handle = reply->handle;
+ }
+ SERVER_END_REQ;
+ if (!handle) return 0;
+
+ /* No need to wait on the handle since the process gets suspended
+ * once the event is passed to the debugger, so when we get back
+ * here the event has been continued already.
+ */
+ SERVER_START_REQ( get_exception_status )
+ {
+ req->handle = handle;
+ wine_server_set_reply( req, context, sizeof(*context) );
+ wine_server_call( req );
+ ret = reply->status;
+ }
+ SERVER_END_REQ;
+ NtClose( handle );
+ return ret;
+}
+
+
+/**********************************************************************
+ * call_vectored_handlers
+ *
+ * Call the vectored handlers chain.
+ */
+static LONG call_vectored_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
+{
+ struct list *ptr;
+ LONG ret = EXCEPTION_CONTINUE_SEARCH;
+ EXCEPTION_POINTERS except_ptrs;
+
+ except_ptrs.ExceptionRecord = rec;
+ except_ptrs.ContextRecord = context;
+
+ RtlEnterCriticalSection( &vectored_handlers_section );
+ LIST_FOR_EACH( ptr, &vectored_handlers )
+ {
+ VECTORED_HANDLER *handler = LIST_ENTRY( ptr, VECTORED_HANDLER, entry );
+ ret = handler->func( &except_ptrs );
+ if (ret == EXCEPTION_CONTINUE_EXECUTION) break;
+ }
+ RtlLeaveCriticalSection( &vectored_handlers_section );
return ret;
}
*/
static void EXC_DefaultHandling( EXCEPTION_RECORD *rec, CONTEXT *context )
{
+ if (send_debug_event( rec, FALSE, context ) == DBG_CONTINUE) return; /* continue execution */
+
if (rec->ExceptionFlags & EH_STACK_INVALID)
ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
- else if (rec->ExceptionCode == EXCEPTION_NONCONTINUABLE_EXCEPTION)
+ else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
ERR("Process attempted to continue execution after noncontinuable exception.\n");
else
ERR("Unhandled exception code %lx flags %lx addr %p\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
- /* Should I add here a back trace ? */
- TerminateProcess( GetCurrentProcess(), 1 );
+ NtTerminateProcess( NtCurrentProcess(), 1 );
}
-/*******************************************************************
- * EXC_RaiseException
- *
- * Implementation of NtRaiseException.
+/***********************************************************************
+ * RtlRaiseException (NTDLL.@)
*/
-static void EXC_RaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
+void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
{
- PEXCEPTION_FRAME frame, dispatch, nested_frame;
+ EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
EXCEPTION_RECORD newrec;
- DWORD res;
+ DWORD res, c;
- frame = NtCurrentTeb()->except;
+ TRACE( "code=%lx flags=%lx addr=%p\n", rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
+ for (c=0; c<rec->NumberParameters; c++) TRACE(" info[%ld]=%08lx\n", c, rec->ExceptionInformation[c]);
+ if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
+ {
+ if (HIWORD(rec->ExceptionInformation[1]))
+ MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
+ rec->ExceptionAddress,
+ (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
+ else
+ MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
+ rec->ExceptionAddress,
+ (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
+ }
+#ifdef __i386__
+ else
+ {
+ TRACE(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
+ context->Eax, context->Ebx, context->Ecx,
+ context->Edx, context->Esi, context->Edi );
+ TRACE(" ebp=%08lx esp=%08lx cs=%04lx ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
+ context->Ebp, context->Esp, context->SegCs, context->SegDs,
+ context->SegEs, context->SegFs, context->SegGs, context->EFlags );
+ }
+#endif
+
+ if (send_debug_event( rec, TRUE, context ) == DBG_CONTINUE) return; /* continue execution */
+
+ if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) return;
+
+ frame = NtCurrentTeb()->Tib.ExceptionList;
nested_frame = NULL;
- while (frame != (PEXCEPTION_FRAME)0xFFFFFFFF)
+ while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
{
/* Check frame address */
- if (((void*)frame < NtCurrentTeb()->stack_low) ||
- ((void*)(frame+1) > NtCurrentTeb()->stack_top) ||
- (int)frame & 3)
+ if (((void*)frame < NtCurrentTeb()->Tib.StackLimit) ||
+ ((void*)(frame+1) > NtCurrentTeb()->Tib.StackBase) ||
+ (ULONG_PTR)frame & 3)
{
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
/* Call handler */
- res = EXC_CallHandler( frame->Handler, EXC_RaiseHandler, rec, frame, context, &dispatch );
+ res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, EXC_RaiseHandler );
if (frame == nested_frame)
{
/* no longer nested */
EXC_DefaultHandling( rec, context );
}
+/**********************************************************************/
+
+#ifdef DEFINE_REGS_ENTRYPOINT
+DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 4, 4 );
+#else
+void WINAPI RtlRaiseException( EXCEPTION_RECORD *rec )
+{
+ CONTEXT context;
+ memset( &context, 0, sizeof(context) );
+ __regs_RtlRaiseException( rec, &context );
+}
+#endif
+
/*******************************************************************
- * EXC_RtlUnwind
- *
- * Implementation of RtlUnwind.
+ * RtlUnwind (NTDLL.@)
*/
-static void EXC_RtlUnwind( EXCEPTION_FRAME *pEndFrame, EXCEPTION_RECORD *pRecord,
- CONTEXT *context )
+void WINAPI __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID unusedEip,
+ PEXCEPTION_RECORD pRecord, PVOID returnEax, CONTEXT *context )
{
EXCEPTION_RECORD record, newrec;
- PEXCEPTION_FRAME frame, dispatch;
+ EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
+
+#ifdef __i386__
+ context->Eax = (DWORD)returnEax;
+#endif
/* build an exception record, if we do not have one */
if (!pRecord)
record.ExceptionCode = STATUS_UNWIND;
record.ExceptionFlags = 0;
record.ExceptionRecord = NULL;
- record.ExceptionAddress = (LPVOID)EIP_reg(context);
+ record.ExceptionAddress = GET_IP(context);
record.NumberParameters = 0;
pRecord = &record;
}
pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
-
+
+ TRACE( "code=%lx flags=%lx\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
+
/* get chain of exception frames */
- frame = NtCurrentTeb()->except;
- while ((frame != (PEXCEPTION_FRAME)0xffffffff) && (frame != pEndFrame))
+ frame = NtCurrentTeb()->Tib.ExceptionList;
+ while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
{
/* Check frame address */
if (pEndFrame && (frame > pEndFrame))
newrec.NumberParameters = 0;
RtlRaiseException( &newrec ); /* never returns */
}
- if (((void*)frame < NtCurrentTeb()->stack_low) ||
- ((void*)(frame+1) > NtCurrentTeb()->stack_top) ||
+ if (((void*)frame < NtCurrentTeb()->Tib.StackLimit) ||
+ ((void*)(frame+1) > NtCurrentTeb()->Tib.StackBase) ||
(int)frame & 3)
{
newrec.ExceptionCode = STATUS_BAD_STACK;
}
/* Call handler */
- switch(EXC_CallHandler( frame->Handler, EXC_UnwindHandler, pRecord,
- frame, context, &dispatch ))
+ switch(EXC_CallHandler( pRecord, frame, context, &dispatch,
+ frame->Handler, EXC_UnwindHandler ))
{
case ExceptionContinueSearch:
break;
RtlRaiseException( &newrec ); /* never returns */
break;
}
- NtCurrentTeb()->except = frame = frame->Prev;
+ frame = __wine_pop_frame( frame );
}
}
+/**********************************************************************/
-/*******************************************************************
- * NtRaiseException (NTDLL.175)
- *
- * Real prototype:
- * DWORD WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *ctx, BOOL first );
- */
-REGS_ENTRYPOINT(NtRaiseException)
+#ifdef DEFINE_REGS_ENTRYPOINT
+DEFINE_REGS_ENTRYPOINT( RtlUnwind, 16, 16 );
+#else
+void WINAPI RtlUnwind( PVOID pEndFrame, PVOID unusedEip,
+ PEXCEPTION_RECORD pRecord, PVOID returnEax )
{
- DWORD ret;
- EXCEPTION_RECORD *rec;
- CONTEXT *ctx;
- BOOL first;
+ CONTEXT context;
+ memset( &context, 0, sizeof(context) );
+ __regs_RtlUnwind( pEndFrame, unusedEip, pRecord, returnEax, &context );
+}
+#endif
- ret = STACK32_POP(context); /* return addr */
- rec = (PEXCEPTION_RECORD)STACK32_POP(context);
- ctx = (PCONTEXT)STACK32_POP(context);
- first = (BOOL)STACK32_POP(context);
- STACK32_PUSH(context,ret); /* restore return addr */
- EXC_RaiseException( rec, context );
+/*******************************************************************
+ * NtRaiseException (NTDLL.@)
+ */
+void WINAPI __regs_NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *ctx,
+ BOOL first, CONTEXT *context )
+{
+ __regs_RtlRaiseException( rec, ctx );
*context = *ctx;
}
+#ifdef DEFINE_REGS_ENTRYPOINT
+DEFINE_REGS_ENTRYPOINT( NtRaiseException, 12, 12 );
+#else
+void WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *ctx, BOOL first )
+{
+ CONTEXT context;
+ memset( &context, 0, sizeof(context) );
+ __regs_NtRaiseException( rec, ctx, first, &context );
+}
+#endif
+
/***********************************************************************
- * RtlRaiseException (NTDLL.464)
+ * RtlRaiseStatus (NTDLL.@)
*
- * Real prototype:
- * void WINAPI RtlRaiseException(PEXCEPTION_RECORD pRecord)
+ * Raise an exception with ExceptionCode = status
*/
-REGS_ENTRYPOINT(RtlRaiseException)
+void WINAPI RtlRaiseStatus( NTSTATUS status )
{
- EXCEPTION_RECORD *rec;
- DWORD ret;
+ EXCEPTION_RECORD ExceptionRec;
+
+ ExceptionRec.ExceptionCode = status;
+ ExceptionRec.ExceptionFlags = EH_NONCONTINUABLE;
+ ExceptionRec.ExceptionRecord = NULL;
+ ExceptionRec.NumberParameters = 0;
+ RtlRaiseException( &ExceptionRec );
+}
- ret = STACK32_POP(context); /* return addr */
- rec = (PEXCEPTION_RECORD)STACK32_POP(context);
- STACK32_PUSH(context,ret); /* restore return addr */
- rec->ExceptionAddress = (LPVOID)EIP_reg(context);
- EXC_RaiseException( rec, context );
+/*******************************************************************
+ * RtlAddVectoredExceptionHandler (NTDLL.@)
+ */
+PVOID WINAPI RtlAddVectoredExceptionHandler( ULONG first, PVECTORED_EXCEPTION_HANDLER func )
+{
+ VECTORED_HANDLER *handler = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*handler) );
+ if (handler)
+ {
+ handler->func = func;
+ RtlEnterCriticalSection( &vectored_handlers_section );
+ if (first) list_add_head( &vectored_handlers, &handler->entry );
+ else list_add_tail( &vectored_handlers, &handler->entry );
+ RtlLeaveCriticalSection( &vectored_handlers_section );
+ }
+ return handler;
}
/*******************************************************************
- * RtlUnwind (KERNEL32.590) (NTDLL.518)
- *
- * This function is undocumented. This is the general idea of
- * RtlUnwind, though. Note that error handling is not yet implemented.
- *
- * The real prototype is:
- * void WINAPI RtlUnwind( PEXCEPTION_FRAME pEndFrame, LPVOID unusedEip,
- * PEXCEPTION_RECORD pRecord, DWORD returnEax );
+ * RtlRemoveVectoredExceptionHandler (NTDLL.@)
*/
-REGS_ENTRYPOINT(RtlUnwind)
+ULONG WINAPI RtlRemoveVectoredExceptionHandler( PVOID handler )
{
- PEXCEPTION_FRAME pEndFrame;
- PEXCEPTION_RECORD pRecord;
-
- /* get the arguments from the stack */
- DWORD ret = STACK32_POP(context); /* return addr */
- pEndFrame = (PEXCEPTION_FRAME)STACK32_POP(context);
- (void)STACK32_POP(context); /* unused arg */
- pRecord = (PEXCEPTION_RECORD)STACK32_POP(context);
- EAX_reg(context) = STACK32_POP(context);
- STACK32_PUSH(context,ret); /* restore return addr */
-
- EXC_RtlUnwind( pEndFrame, pRecord, context );
+ struct list *ptr;
+ ULONG ret = FALSE;
+
+ RtlEnterCriticalSection( &vectored_handlers_section );
+ LIST_FOR_EACH( ptr, &vectored_handlers )
+ {
+ VECTORED_HANDLER *curr_handler = LIST_ENTRY( ptr, VECTORED_HANDLER, entry );
+ if (curr_handler == handler)
+ {
+ list_remove( ptr );
+ ret = TRUE;
+ break;
+ }
+ }
+ RtlLeaveCriticalSection( &vectored_handlers_section );
+ if (ret) RtlFreeHeap( GetProcessHeap(), 0, handler );
+ return ret;
}
-/***********************************************************************
- * RtlRaiseStatus (NTDLL.465)
+/*************************************************************
+ * __wine_exception_handler (NTDLL.@)
*
- * Raise an exception with ExceptionCode = status
+ * Exception handler for exception blocks declared in Wine code.
*/
-void WINAPI RtlRaiseStatus( NTSTATUS status )
+DWORD __wine_exception_handler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
+ CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
- EXCEPTION_RECORD ExceptionRec;
+ __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
- ExceptionRec.ExceptionCode = status;
- ExceptionRec.ExceptionFlags = EH_NONCONTINUABLE;
- ExceptionRec.ExceptionRecord = NULL;
- ExceptionRec.NumberParameters = 0;
- RtlRaiseException( &ExceptionRec );
+ if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
+ return ExceptionContinueSearch;
+ if (wine_frame->u.filter)
+ {
+ EXCEPTION_POINTERS ptrs;
+ ptrs.ExceptionRecord = record;
+ ptrs.ContextRecord = context;
+ switch(wine_frame->u.filter( &ptrs ))
+ {
+ case EXCEPTION_CONTINUE_SEARCH:
+ return ExceptionContinueSearch;
+ case EXCEPTION_CONTINUE_EXECUTION:
+ return ExceptionContinueExecution;
+ case EXCEPTION_EXECUTE_HANDLER:
+ break;
+ default:
+ MESSAGE( "Invalid return value from exception filter\n" );
+ assert( FALSE );
+ }
+ }
+ /* hack to make GetExceptionCode() work in handler */
+ wine_frame->ExceptionCode = record->ExceptionCode;
+ wine_frame->ExceptionRecord = wine_frame;
+
+ RtlUnwind( frame, 0, record, 0 );
+ __wine_pop_frame( frame );
+ siglongjmp( wine_frame->jmp, 1 );
+}
+
+
+/*************************************************************
+ * __wine_finally_handler (NTDLL.@)
+ *
+ * Exception handler for try/finally blocks declared in Wine code.
+ */
+DWORD __wine_finally_handler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
+ CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **pdispatcher )
+{
+ if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
+ {
+ __WINE_FRAME *wine_frame = (__WINE_FRAME *)frame;
+ wine_frame->u.finally_func( FALSE );
+ }
+ return ExceptionContinueSearch;
}
projects / wine / blobdiff