606 lines
20 KiB
C
606 lines
20 KiB
C
/*
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* NT exception handling routines
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*
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* Copyright 1999 Turchanov Sergey
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* Copyright 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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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdarg.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "wine/exception.h"
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#include "wine/server.h"
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#include "wine/list.h"
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#include "wine/debug.h"
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#include "excpt.h"
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#include "ntdll_misc.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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/* Exception record for handling exceptions happening inside exception handlers */
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typedef struct
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{
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EXCEPTION_REGISTRATION_RECORD frame;
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EXCEPTION_REGISTRATION_RECORD *prevFrame;
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} EXC_NESTED_FRAME;
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typedef struct
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{
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struct list entry;
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PVECTORED_EXCEPTION_HANDLER func;
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} VECTORED_HANDLER;
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static struct list vectored_handlers = LIST_INIT(vectored_handlers);
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static RTL_CRITICAL_SECTION vectored_handlers_section;
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static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
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{
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0, 0, &vectored_handlers_section,
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{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
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0, 0, { (DWORD_PTR)(__FILE__ ": vectored_handlers_section") }
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};
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static RTL_CRITICAL_SECTION vectored_handlers_section = { &critsect_debug, -1, 0, 0, 0, 0 };
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#ifdef __i386__
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# define GET_IP(context) ((LPVOID)(context)->Eip)
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#elif defined(__sparc__)
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# define GET_IP(context) ((LPVOID)(context)->pc)
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#elif defined(__powerpc__)
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# define GET_IP(context) ((LPVOID)(context)->Iar)
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#elif defined(__ALPHA__)
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# define GET_IP(context) ((LPVOID)(context)->Fir)
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#elif defined(__x86_64__)
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# define GET_IP(context) ((LPVOID)(context)->Rip)
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#else
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# error You must define GET_IP for this CPU
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#endif
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/*******************************************************************
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* EXC_RaiseHandler
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*
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* Handler for exceptions happening inside a handler.
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*/
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static DWORD EXC_RaiseHandler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
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{
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if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
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return ExceptionContinueSearch;
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/* We shouldn't get here so we store faulty frame in dispatcher */
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*dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
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return ExceptionNestedException;
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}
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/*******************************************************************
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* EXC_UnwindHandler
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*
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* Handler for exceptions happening inside an unwind handler.
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*/
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static DWORD EXC_UnwindHandler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
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{
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if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
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return ExceptionContinueSearch;
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/* We shouldn't get here so we store faulty frame in dispatcher */
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*dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
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return ExceptionCollidedUnwind;
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}
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/*******************************************************************
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* EXC_CallHandler
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*
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* Call an exception handler, setting up an exception frame to catch exceptions
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* happening during the handler execution.
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*
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* For i386 this function is implemented in assembler in signal_i386.c.
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*/
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#ifndef __i386__
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static DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
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PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler)
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{
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EXC_NESTED_FRAME newframe;
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DWORD ret;
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newframe.frame.Handler = nested_handler;
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newframe.prevFrame = frame;
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__wine_push_frame( &newframe.frame );
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ret = handler( record, frame, context, dispatcher );
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__wine_pop_frame( &newframe.frame );
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return ret;
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}
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#else
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/* in signal_i386.c */
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extern DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
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CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
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PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler);
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#endif
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/**********************************************************************
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* wait_suspend
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*
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* Wait until the thread is no longer suspended.
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*/
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void wait_suspend( CONTEXT *context )
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{
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LARGE_INTEGER timeout;
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int saved_errno = errno;
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/* store the context we got at suspend time */
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SERVER_START_REQ( set_thread_context )
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{
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req->handle = GetCurrentThread();
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req->flags = CONTEXT_FULL;
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req->suspend = 1;
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wine_server_add_data( req, context, sizeof(*context) );
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wine_server_call( req );
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}
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SERVER_END_REQ;
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/* wait with 0 timeout, will only return once the thread is no longer suspended */
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timeout.QuadPart = 0;
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NTDLL_wait_for_multiple_objects( 0, NULL, SELECT_INTERRUPTIBLE, &timeout, 0 );
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/* retrieve the new context */
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SERVER_START_REQ( get_thread_context )
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{
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req->handle = GetCurrentThread();
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req->flags = CONTEXT_FULL;
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req->suspend = 1;
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wine_server_set_reply( req, context, sizeof(*context) );
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wine_server_call( req );
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}
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SERVER_END_REQ;
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errno = saved_errno;
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}
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/**********************************************************************
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* send_debug_event
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*
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* Send an EXCEPTION_DEBUG_EVENT event to the debugger.
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*/
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static NTSTATUS send_debug_event( EXCEPTION_RECORD *rec, int first_chance, CONTEXT *context )
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{
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int ret;
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HANDLE handle = 0;
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if (!NtCurrentTeb()->Peb->BeingDebugged) return 0; /* no debugger present */
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SERVER_START_REQ( queue_exception_event )
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{
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req->first = first_chance;
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wine_server_add_data( req, context, sizeof(*context) );
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wine_server_add_data( req, rec, sizeof(*rec) );
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if (!wine_server_call( req )) handle = reply->handle;
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}
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SERVER_END_REQ;
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if (!handle) return 0;
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NTDLL_wait_for_multiple_objects( 1, &handle, SELECT_INTERRUPTIBLE, NULL, 0 );
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SERVER_START_REQ( get_exception_status )
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{
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req->handle = handle;
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wine_server_set_reply( req, context, sizeof(*context) );
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ret = wine_server_call( req );
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}
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SERVER_END_REQ;
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return ret;
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}
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/**********************************************************************
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* call_vectored_handlers
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*
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* Call the vectored handlers chain.
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*/
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static LONG call_vectored_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
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{
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struct list *ptr;
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LONG ret = EXCEPTION_CONTINUE_SEARCH;
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EXCEPTION_POINTERS except_ptrs;
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except_ptrs.ExceptionRecord = rec;
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except_ptrs.ContextRecord = context;
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RtlEnterCriticalSection( &vectored_handlers_section );
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LIST_FOR_EACH( ptr, &vectored_handlers )
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{
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VECTORED_HANDLER *handler = LIST_ENTRY( ptr, VECTORED_HANDLER, entry );
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ret = handler->func( &except_ptrs );
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if (ret == EXCEPTION_CONTINUE_EXECUTION) break;
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}
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RtlLeaveCriticalSection( &vectored_handlers_section );
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return ret;
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}
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/**********************************************************************
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* call_stack_handlers
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*
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* Call the stack handlers chain.
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*/
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static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
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{
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EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
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DWORD res;
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frame = NtCurrentTeb()->Tib.ExceptionList;
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nested_frame = NULL;
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while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
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{
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/* Check frame address */
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if (((void*)frame < NtCurrentTeb()->Tib.StackLimit) ||
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((void*)(frame+1) > NtCurrentTeb()->Tib.StackBase) ||
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(ULONG_PTR)frame & 3)
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{
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rec->ExceptionFlags |= EH_STACK_INVALID;
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break;
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}
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/* Call handler */
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TRACE( "calling handler at %p code=%x flags=%x\n",
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frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
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res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, EXC_RaiseHandler );
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TRACE( "handler at %p returned %x\n", frame->Handler, res );
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if (frame == nested_frame)
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{
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/* no longer nested */
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nested_frame = NULL;
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rec->ExceptionFlags &= ~EH_NESTED_CALL;
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}
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switch(res)
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{
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case ExceptionContinueExecution:
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if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
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return STATUS_NONCONTINUABLE_EXCEPTION;
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case ExceptionContinueSearch:
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break;
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case ExceptionNestedException:
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if (nested_frame < dispatch) nested_frame = dispatch;
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rec->ExceptionFlags |= EH_NESTED_CALL;
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break;
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default:
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return STATUS_INVALID_DISPOSITION;
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}
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frame = frame->Prev;
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}
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return STATUS_UNHANDLED_EXCEPTION;
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}
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/*******************************************************************
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* raise_exception
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*
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* Implementation of NtRaiseException.
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*/
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static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
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{
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NTSTATUS status;
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if (first_chance)
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{
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DWORD c;
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TRACE( "code=%x flags=%x addr=%p\n",
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rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
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for (c = 0; c < rec->NumberParameters; c++)
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TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
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if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
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{
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if (rec->ExceptionInformation[1] >> 16)
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MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
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rec->ExceptionAddress,
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(char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
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else
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MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
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rec->ExceptionAddress,
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(char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
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}
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#ifdef __i386__
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else
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{
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TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
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context->Eax, context->Ebx, context->Ecx,
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context->Edx, context->Esi, context->Edi );
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TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
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context->Ebp, context->Esp, context->SegCs, context->SegDs,
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context->SegEs, context->SegFs, context->SegGs, context->EFlags );
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}
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#endif
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status = send_debug_event( rec, TRUE, context );
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if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
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return STATUS_SUCCESS;
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#ifdef __i386__
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/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
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if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--;
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#endif
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if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
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return STATUS_SUCCESS;
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if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
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return status;
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}
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/* last chance exception */
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status = send_debug_event( rec, FALSE, context );
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if (status != DBG_CONTINUE)
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{
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if (rec->ExceptionFlags & EH_STACK_INVALID)
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ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
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else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
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ERR("Process attempted to continue execution after noncontinuable exception.\n");
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else
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ERR("Unhandled exception code %x flags %x addr %p\n",
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rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
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NtTerminateProcess( NtCurrentProcess(), 1 );
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}
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return STATUS_SUCCESS;
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}
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/*******************************************************************
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* NtRaiseException (NTDLL.@)
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*/
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NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
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{
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NTSTATUS status = raise_exception( rec, context, first_chance );
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if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
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return status;
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}
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/***********************************************************************
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* RtlCaptureContext (NTDLL.@)
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*/
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void WINAPI __regs_RtlCaptureContext( CONTEXT *context_out, CONTEXT *context_in )
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{
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*context_out = *context_in;
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}
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/**********************************************************************/
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#ifdef DEFINE_REGS_ENTRYPOINT
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DEFINE_REGS_ENTRYPOINT( RtlCaptureContext, 4, 4 )
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#else
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void WINAPI RtlCaptureContext( CONTEXT *context_out )
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{
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memset( context_out, 0, sizeof(*context_out) );
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}
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#endif
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/***********************************************************************
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* RtlRaiseException (NTDLL.@)
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*/
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void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
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{
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NTSTATUS status = raise_exception( rec, context, TRUE );
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if (status != STATUS_SUCCESS)
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{
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EXCEPTION_RECORD newrec;
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newrec.ExceptionCode = status;
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newrec.ExceptionFlags = EH_NONCONTINUABLE;
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newrec.ExceptionRecord = rec;
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newrec.NumberParameters = 0;
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RtlRaiseException( &newrec ); /* never returns */
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}
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}
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/**********************************************************************/
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#ifdef DEFINE_REGS_ENTRYPOINT
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DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 4, 4 )
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#else
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void WINAPI RtlRaiseException( EXCEPTION_RECORD *rec )
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{
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CONTEXT context;
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RtlCaptureContext( &context );
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__regs_RtlRaiseException( rec, &context );
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}
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#endif
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/*******************************************************************
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* RtlUnwind (NTDLL.@)
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*/
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void WINAPI __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID unusedEip,
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PEXCEPTION_RECORD pRecord, PVOID returnEax, CONTEXT *context )
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{
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EXCEPTION_RECORD record, newrec;
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EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
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DWORD res;
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#ifdef __i386__
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context->Eax = (DWORD)returnEax;
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#endif
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/* build an exception record, if we do not have one */
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if (!pRecord)
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{
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record.ExceptionCode = STATUS_UNWIND;
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record.ExceptionFlags = 0;
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record.ExceptionRecord = NULL;
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record.ExceptionAddress = GET_IP(context);
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record.NumberParameters = 0;
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pRecord = &record;
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}
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pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
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TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
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/* get chain of exception frames */
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frame = NtCurrentTeb()->Tib.ExceptionList;
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while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
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{
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/* Check frame address */
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if (pEndFrame && (frame > pEndFrame))
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{
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newrec.ExceptionCode = STATUS_INVALID_UNWIND_TARGET;
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newrec.ExceptionFlags = EH_NONCONTINUABLE;
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newrec.ExceptionRecord = pRecord;
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newrec.NumberParameters = 0;
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RtlRaiseException( &newrec ); /* never returns */
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}
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if (((void*)frame < NtCurrentTeb()->Tib.StackLimit) ||
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((void*)(frame+1) > NtCurrentTeb()->Tib.StackBase) ||
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(UINT_PTR)frame & 3)
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{
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newrec.ExceptionCode = STATUS_BAD_STACK;
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newrec.ExceptionFlags = EH_NONCONTINUABLE;
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newrec.ExceptionRecord = pRecord;
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newrec.NumberParameters = 0;
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RtlRaiseException( &newrec ); /* never returns */
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}
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/* Call handler */
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TRACE( "calling handler at %p code=%x flags=%x\n",
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frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags );
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res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, EXC_UnwindHandler );
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TRACE( "handler at %p returned %x\n", frame->Handler, res );
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switch(res)
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{
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case ExceptionContinueSearch:
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break;
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case ExceptionCollidedUnwind:
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frame = dispatch;
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break;
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default:
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newrec.ExceptionCode = STATUS_INVALID_DISPOSITION;
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newrec.ExceptionFlags = EH_NONCONTINUABLE;
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newrec.ExceptionRecord = pRecord;
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newrec.NumberParameters = 0;
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RtlRaiseException( &newrec ); /* never returns */
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break;
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}
|
|
frame = __wine_pop_frame( frame );
|
|
}
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
#ifdef DEFINE_REGS_ENTRYPOINT
|
|
DEFINE_REGS_ENTRYPOINT( RtlUnwind, 16, 16 )
|
|
#else
|
|
void WINAPI RtlUnwind( PVOID pEndFrame, PVOID unusedEip,
|
|
PEXCEPTION_RECORD pRecord, PVOID returnEax )
|
|
{
|
|
CONTEXT context;
|
|
RtlCaptureContext( &context );
|
|
__regs_RtlUnwind( pEndFrame, unusedEip, pRecord, returnEax, &context );
|
|
}
|
|
#endif
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlRaiseStatus (NTDLL.@)
|
|
*
|
|
* Raise an exception with ExceptionCode = status
|
|
*/
|
|
void WINAPI RtlRaiseStatus( NTSTATUS status )
|
|
{
|
|
EXCEPTION_RECORD ExceptionRec;
|
|
|
|
ExceptionRec.ExceptionCode = status;
|
|
ExceptionRec.ExceptionFlags = EH_NONCONTINUABLE;
|
|
ExceptionRec.ExceptionRecord = NULL;
|
|
ExceptionRec.NumberParameters = 0;
|
|
RtlRaiseException( &ExceptionRec );
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* 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;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* RtlRemoveVectoredExceptionHandler (NTDLL.@)
|
|
*/
|
|
ULONG WINAPI RtlRemoveVectoredExceptionHandler( PVOID handler )
|
|
{
|
|
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;
|
|
}
|
|
|
|
|
|
/*************************************************************
|
|
* __wine_spec_unimplemented_stub
|
|
*
|
|
* ntdll-specific implementation to avoid depending on kernel functions.
|
|
* Can be removed once ntdll.spec no longer contains stubs.
|
|
*/
|
|
void __wine_spec_unimplemented_stub( const char *module, const char *function )
|
|
{
|
|
EXCEPTION_RECORD record;
|
|
|
|
record.ExceptionCode = EXCEPTION_WINE_STUB;
|
|
record.ExceptionFlags = EH_NONCONTINUABLE;
|
|
record.ExceptionRecord = NULL;
|
|
record.ExceptionAddress = __wine_spec_unimplemented_stub;
|
|
record.NumberParameters = 2;
|
|
record.ExceptionInformation[0] = (ULONG_PTR)module;
|
|
record.ExceptionInformation[1] = (ULONG_PTR)function;
|
|
RtlRaiseException( &record );
|
|
}
|