527 lines
18 KiB
C
527 lines
18 KiB
C
/*
|
|
* Win32 exception functions
|
|
*
|
|
* Copyright (c) 1996 Onno Hovers, (onno@stack.urc.tue.nl)
|
|
* Copyright (c) 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
|
|
*
|
|
* Notes:
|
|
* What really happens behind the scenes of those new
|
|
* __try{...}__except(..){....} and
|
|
* __try{...}__finally{...}
|
|
* statements is simply not documented by Microsoft. There could be different
|
|
* reasons for this:
|
|
* One reason could be that they try to hide the fact that exception
|
|
* handling in Win32 looks almost the same as in OS/2 2.x.
|
|
* Another reason could be that Microsoft does not want others to write
|
|
* binary compatible implementations of the Win32 API (like us).
|
|
*
|
|
* Whatever the reason, THIS SUCKS!! Ensuring portability or future
|
|
* compatibility may be valid reasons to keep some things undocumented.
|
|
* But exception handling is so basic to Win32 that it should be
|
|
* documented!
|
|
*
|
|
*/
|
|
#include "config.h"
|
|
#include "wine/port.h"
|
|
|
|
#include <stdio.h>
|
|
#include "windef.h"
|
|
#include "winerror.h"
|
|
#include "winternl.h"
|
|
#include "wingdi.h"
|
|
#include "winuser.h"
|
|
#include "wine/exception.h"
|
|
#include "wine/library.h"
|
|
#include "thread.h"
|
|
#include "stackframe.h"
|
|
#include "msvcrt/excpt.h"
|
|
#include "wine/server.h"
|
|
#include "wine/unicode.h"
|
|
#include "wine/debug.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(seh);
|
|
|
|
static PTOP_LEVEL_EXCEPTION_FILTER top_filter;
|
|
|
|
typedef INT (WINAPI *MessageBoxA_funcptr)(HWND,LPCSTR,LPCSTR,UINT);
|
|
typedef INT (WINAPI *MessageBoxW_funcptr)(HWND,LPCWSTR,LPCWSTR,UINT);
|
|
|
|
/*******************************************************************
|
|
* RaiseException (KERNEL32.@)
|
|
*/
|
|
void WINAPI RaiseException( DWORD code, DWORD flags, DWORD nbargs, const LPDWORD args )
|
|
{
|
|
EXCEPTION_RECORD record;
|
|
|
|
/* Compose an exception record */
|
|
|
|
record.ExceptionCode = code;
|
|
record.ExceptionFlags = flags & EH_NONCONTINUABLE;
|
|
record.ExceptionRecord = NULL;
|
|
record.ExceptionAddress = RaiseException;
|
|
if (nbargs && args)
|
|
{
|
|
if (nbargs > EXCEPTION_MAXIMUM_PARAMETERS) nbargs = EXCEPTION_MAXIMUM_PARAMETERS;
|
|
record.NumberParameters = nbargs;
|
|
memcpy( record.ExceptionInformation, args, nbargs * sizeof(*args) );
|
|
}
|
|
else record.NumberParameters = 0;
|
|
|
|
RtlRaiseException( &record );
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* format_exception_msg
|
|
*/
|
|
static int format_exception_msg( const EXCEPTION_POINTERS *ptr, char *buffer, int size )
|
|
{
|
|
const EXCEPTION_RECORD *rec = ptr->ExceptionRecord;
|
|
int len,len2;
|
|
|
|
switch(rec->ExceptionCode)
|
|
{
|
|
case EXCEPTION_INT_DIVIDE_BY_ZERO:
|
|
len = snprintf( buffer, size, "Unhandled division by zero" );
|
|
break;
|
|
case EXCEPTION_INT_OVERFLOW:
|
|
len = snprintf( buffer, size, "Unhandled overflow" );
|
|
break;
|
|
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
|
|
len = snprintf( buffer, size, "Unhandled array bounds" );
|
|
break;
|
|
case EXCEPTION_ILLEGAL_INSTRUCTION:
|
|
len = snprintf( buffer, size, "Unhandled illegal instruction" );
|
|
break;
|
|
case EXCEPTION_STACK_OVERFLOW:
|
|
len = snprintf( buffer, size, "Unhandled stack overflow" );
|
|
break;
|
|
case EXCEPTION_PRIV_INSTRUCTION:
|
|
len = snprintf( buffer, size, "Unhandled privileged instruction" );
|
|
break;
|
|
case EXCEPTION_ACCESS_VIOLATION:
|
|
if (rec->NumberParameters == 2)
|
|
len = snprintf( buffer, size, "Unhandled page fault on %s access to 0x%08lx",
|
|
rec->ExceptionInformation[0] ? "write" : "read",
|
|
rec->ExceptionInformation[1]);
|
|
else
|
|
len = snprintf( buffer, size, "Unhandled page fault");
|
|
break;
|
|
case EXCEPTION_DATATYPE_MISALIGNMENT:
|
|
len = snprintf( buffer, size, "Unhandled alignment" );
|
|
break;
|
|
case CONTROL_C_EXIT:
|
|
len = snprintf( buffer, size, "Unhandled ^C");
|
|
break;
|
|
case EXCEPTION_CRITICAL_SECTION_WAIT:
|
|
len = snprintf( buffer, size, "Critical section %08lx wait failed",
|
|
rec->ExceptionInformation[0]);
|
|
break;
|
|
case EXCEPTION_WINE_STUB:
|
|
len = snprintf( buffer, size, "Unimplemented function %s.%s called",
|
|
(char *)rec->ExceptionInformation[0], (char *)rec->ExceptionInformation[1] );
|
|
break;
|
|
case EXCEPTION_VM86_INTx:
|
|
len = snprintf( buffer, size, "Unhandled interrupt %02lx in vm86 mode",
|
|
rec->ExceptionInformation[0]);
|
|
break;
|
|
case EXCEPTION_VM86_STI:
|
|
len = snprintf( buffer, size, "Unhandled sti in vm86 mode");
|
|
break;
|
|
case EXCEPTION_VM86_PICRETURN:
|
|
len = snprintf( buffer, size, "Unhandled PIC return in vm86 mode");
|
|
break;
|
|
default:
|
|
len = snprintf( buffer, size, "Unhandled exception 0x%08lx", rec->ExceptionCode);
|
|
break;
|
|
}
|
|
if ((len<0) || (len>=size))
|
|
return -1;
|
|
#ifdef __i386__
|
|
if (ptr->ContextRecord->SegCs != wine_get_cs())
|
|
len2 = snprintf(buffer+len, size-len,
|
|
" at address 0x%04lx:0x%08lx.\nDo you wish to debug it ?",
|
|
ptr->ContextRecord->SegCs,
|
|
(DWORD)ptr->ExceptionRecord->ExceptionAddress);
|
|
else
|
|
#endif
|
|
len2 = snprintf(buffer+len, size-len,
|
|
" at address 0x%08lx.\nDo you wish to debug it ?",
|
|
(DWORD)ptr->ExceptionRecord->ExceptionAddress);
|
|
if ((len2<0) || (len>=size-len))
|
|
return -1;
|
|
return len+len2;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* 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;
|
|
|
|
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 debugger present or other error */
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/******************************************************************
|
|
* start_debugger
|
|
*
|
|
* Does the effective debugger startup according to 'format'
|
|
*/
|
|
static BOOL start_debugger(PEXCEPTION_POINTERS epointers, HANDLE hEvent)
|
|
{
|
|
OBJECT_ATTRIBUTES attr;
|
|
UNICODE_STRING nameW;
|
|
HKEY hDbgConf;
|
|
DWORD bAuto = FALSE;
|
|
PROCESS_INFORMATION info;
|
|
STARTUPINFOA startup;
|
|
char* cmdline = NULL;
|
|
char* format = NULL;
|
|
DWORD format_size;
|
|
BOOL ret = FALSE;
|
|
|
|
static const WCHAR AeDebugW[] = {'M','a','c','h','i','n','e','\\',
|
|
'S','o','f','t','w','a','r','e','\\',
|
|
'M','i','c','r','o','s','o','f','t','\\',
|
|
'W','i','n','d','o','w','s',' ','N','T','\\',
|
|
'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
|
|
'A','e','D','e','b','u','g',0};
|
|
static const WCHAR DebuggerW[] = {'D','e','b','u','g','g','e','r',0};
|
|
static const WCHAR AutoW[] = {'A','u','t','o',0};
|
|
|
|
MESSAGE("wine: Unhandled exception, starting debugger...\n");
|
|
|
|
attr.Length = sizeof(attr);
|
|
attr.RootDirectory = 0;
|
|
attr.ObjectName = &nameW;
|
|
attr.Attributes = 0;
|
|
attr.SecurityDescriptor = NULL;
|
|
attr.SecurityQualityOfService = NULL;
|
|
RtlInitUnicodeString( &nameW, AeDebugW );
|
|
|
|
if (!NtOpenKey( &hDbgConf, KEY_ALL_ACCESS, &attr ))
|
|
{
|
|
char buffer[64];
|
|
KEY_VALUE_PARTIAL_INFORMATION *info;
|
|
|
|
format_size = 0;
|
|
RtlInitUnicodeString( &nameW, DebuggerW );
|
|
if (NtQueryValueKey( hDbgConf, &nameW, KeyValuePartialInformation,
|
|
NULL, 0, &format_size ) == STATUS_BUFFER_OVERFLOW)
|
|
{
|
|
char *data = HeapAlloc(GetProcessHeap(), 0, format_size);
|
|
NtQueryValueKey( hDbgConf, &nameW, KeyValuePartialInformation,
|
|
data, format_size, &format_size );
|
|
info = (KEY_VALUE_PARTIAL_INFORMATION *)data;
|
|
RtlUnicodeToMultiByteSize( &format_size, (WCHAR *)info->Data, info->DataLength );
|
|
format = HeapAlloc( GetProcessHeap(), 0, format_size+1 );
|
|
RtlUnicodeToMultiByteN( format, format_size, NULL,
|
|
(WCHAR *)info->Data, info->DataLength );
|
|
format[format_size] = 0;
|
|
|
|
if (info->Type == REG_EXPAND_SZ)
|
|
{
|
|
char* tmp;
|
|
|
|
/* Expand environment variable references */
|
|
format_size=ExpandEnvironmentStringsA(format,NULL,0);
|
|
tmp=HeapAlloc(GetProcessHeap(), 0, format_size);
|
|
ExpandEnvironmentStringsA(format,tmp,format_size);
|
|
HeapFree(GetProcessHeap(), 0, format);
|
|
format=tmp;
|
|
}
|
|
HeapFree( GetProcessHeap(), 0, data );
|
|
}
|
|
|
|
RtlInitUnicodeString( &nameW, AutoW );
|
|
if (!NtQueryValueKey( hDbgConf, &nameW, KeyValuePartialInformation,
|
|
buffer, sizeof(buffer)-sizeof(WCHAR), &format_size ))
|
|
{
|
|
info = (KEY_VALUE_PARTIAL_INFORMATION *)buffer;
|
|
if (info->Type == REG_DWORD) memcpy( &bAuto, info->Data, sizeof(DWORD) );
|
|
else if (info->Type == REG_SZ)
|
|
{
|
|
WCHAR *str = (WCHAR *)info->Data;
|
|
str[info->DataLength/sizeof(WCHAR)] = 0;
|
|
bAuto = atoiW( str );
|
|
}
|
|
}
|
|
else bAuto = TRUE;
|
|
|
|
NtClose(hDbgConf);
|
|
} else {
|
|
/* try a default setup... */
|
|
strcpy( format, "winedbg --debugmsg -all --auto %ld %ld" );
|
|
}
|
|
|
|
if (!bAuto)
|
|
{
|
|
HMODULE mod = GetModuleHandleA( "user32.dll" );
|
|
MessageBoxA_funcptr pMessageBoxA = NULL;
|
|
|
|
if (mod) pMessageBoxA = (MessageBoxA_funcptr)GetProcAddress( mod, "MessageBoxA" );
|
|
if (pMessageBoxA)
|
|
{
|
|
char buffer[256];
|
|
format_exception_msg( epointers, buffer, sizeof(buffer) );
|
|
if (pMessageBoxA( 0, buffer, "Exception raised", MB_YESNO | MB_ICONHAND ) == IDNO)
|
|
{
|
|
TRACE("Killing process\n");
|
|
goto EXIT;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (format) {
|
|
TRACE("Starting debugger (fmt=%s)\n", format);
|
|
cmdline=HeapAlloc(GetProcessHeap(), 0, format_size+2*20);
|
|
sprintf(cmdline, format, GetCurrentProcessId(), hEvent);
|
|
memset(&startup, 0, sizeof(startup));
|
|
startup.cb = sizeof(startup);
|
|
startup.dwFlags = STARTF_USESHOWWINDOW;
|
|
startup.wShowWindow = SW_SHOWNORMAL;
|
|
if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, 0, NULL, NULL, &startup, &info)) {
|
|
/* wait for debugger to come up... */
|
|
WaitForSingleObject(hEvent, INFINITE);
|
|
ret = TRUE;
|
|
goto EXIT;
|
|
}
|
|
} else {
|
|
cmdline = NULL;
|
|
}
|
|
ERR("Couldn't start debugger (%s) (%ld)\n"
|
|
"Read the Wine Developers Guide on how to set up winedbg or another debugger\n",
|
|
debugstr_a(cmdline), GetLastError());
|
|
|
|
EXIT:
|
|
if (cmdline)
|
|
HeapFree(GetProcessHeap(), 0, cmdline);
|
|
if (format)
|
|
HeapFree(GetProcessHeap(), 0, format);
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************
|
|
* start_debugger_atomic
|
|
*
|
|
* starts the debugger in an atomic way:
|
|
* - either the debugger is not started and it is started
|
|
* - or the debugger has already been started by another thread
|
|
* - or the debugger couldn't be started
|
|
*
|
|
* returns TRUE for the two first conditions, FALSE for the last
|
|
*/
|
|
static int start_debugger_atomic(PEXCEPTION_POINTERS epointers)
|
|
{
|
|
static HANDLE hRunOnce /* = 0 */;
|
|
|
|
if (hRunOnce == 0)
|
|
{
|
|
OBJECT_ATTRIBUTES attr;
|
|
HANDLE hEvent;
|
|
|
|
attr.Length = sizeof(attr);
|
|
attr.RootDirectory = 0;
|
|
attr.Attributes = OBJ_INHERIT;
|
|
attr.ObjectName = NULL;
|
|
attr.SecurityDescriptor = NULL;
|
|
attr.SecurityQualityOfService = NULL;
|
|
|
|
/* ask for manual reset, so that once the debugger is started,
|
|
* every thread will know it */
|
|
NtCreateEvent( &hEvent, EVENT_ALL_ACCESS, &attr, TRUE, FALSE );
|
|
if (InterlockedCompareExchange( (LPLONG)&hRunOnce, hEvent, 0 ) == 0)
|
|
{
|
|
/* ok, our event has been set... we're the winning thread */
|
|
BOOL ret = start_debugger( epointers, hRunOnce );
|
|
DWORD tmp;
|
|
|
|
if (!ret)
|
|
{
|
|
/* so that the other threads won't be stuck */
|
|
NtSetEvent( hRunOnce, &tmp );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* someone beat us here... */
|
|
CloseHandle( hEvent );
|
|
}
|
|
|
|
/* and wait for the winner to have actually created the debugger */
|
|
WaitForSingleObject( hRunOnce, INFINITE );
|
|
/* in fact, here, we only know that someone has tried to start the debugger,
|
|
* we'll know by reposting the exception if it has actually attached
|
|
* to the current process */
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* check_resource_write
|
|
*
|
|
* Check if the exception is a write attempt to the resource data.
|
|
* If yes, we unprotect the resources to let broken apps continue
|
|
* (Windows does this too).
|
|
*/
|
|
inline static BOOL check_resource_write( const EXCEPTION_RECORD *rec )
|
|
{
|
|
void *addr, *rsrc;
|
|
DWORD size;
|
|
MEMORY_BASIC_INFORMATION info;
|
|
|
|
if (rec->ExceptionCode != EXCEPTION_ACCESS_VIOLATION) return FALSE;
|
|
if (!rec->ExceptionInformation[0]) return FALSE; /* not a write access */
|
|
addr = (void *)rec->ExceptionInformation[1];
|
|
if (!VirtualQuery( addr, &info, sizeof(info) )) return FALSE;
|
|
if (!(rsrc = RtlImageDirectoryEntryToData( (HMODULE)info.AllocationBase, TRUE,
|
|
IMAGE_DIRECTORY_ENTRY_RESOURCE, &size )))
|
|
return FALSE;
|
|
if (addr < rsrc || (char *)addr >= (char *)rsrc + size) return FALSE;
|
|
FIXME( "Broken app is writing to the resource data, enabling work-around\n" );
|
|
VirtualProtect( rsrc, size, PAGE_WRITECOPY, NULL );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
* UnhandledExceptionFilter (KERNEL32.@)
|
|
*/
|
|
DWORD WINAPI UnhandledExceptionFilter(PEXCEPTION_POINTERS epointers)
|
|
{
|
|
int status;
|
|
int loop = 0;
|
|
|
|
if (check_resource_write( epointers->ExceptionRecord )) return EXCEPTION_CONTINUE_EXECUTION;
|
|
|
|
for (loop = 0; loop <= 1; loop++)
|
|
{
|
|
/* send a last chance event to the debugger */
|
|
status = send_debug_event( epointers->ExceptionRecord, FALSE, epointers->ContextRecord );
|
|
switch (status)
|
|
{
|
|
case DBG_CONTINUE:
|
|
return EXCEPTION_CONTINUE_EXECUTION;
|
|
case DBG_EXCEPTION_NOT_HANDLED:
|
|
TerminateProcess( GetCurrentProcess(), epointers->ExceptionRecord->ExceptionCode );
|
|
break; /* not reached */
|
|
case 0: /* no debugger is present */
|
|
if (epointers->ExceptionRecord->ExceptionCode == CONTROL_C_EXIT)
|
|
{
|
|
/* do not launch the debugger on ^C, simply terminate the process */
|
|
TerminateProcess( GetCurrentProcess(), 1 );
|
|
}
|
|
/* second try, the debugger isn't present... */
|
|
if (loop == 1) return EXCEPTION_EXECUTE_HANDLER;
|
|
break;
|
|
default:
|
|
FIXME("Unsupported yet debug continue value %d (please report)\n", status);
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
|
|
/* should only be there when loop == 0 */
|
|
|
|
if (top_filter)
|
|
{
|
|
DWORD ret = top_filter( epointers );
|
|
if (ret != EXCEPTION_CONTINUE_SEARCH) return ret;
|
|
}
|
|
|
|
/* FIXME: Should check the current error mode */
|
|
|
|
if (!start_debugger_atomic( epointers ))
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
/* now that we should have a debugger attached, try to resend event */
|
|
}
|
|
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetUnhandledExceptionFilter (KERNEL32.@)
|
|
*/
|
|
LPTOP_LEVEL_EXCEPTION_FILTER WINAPI SetUnhandledExceptionFilter(
|
|
LPTOP_LEVEL_EXCEPTION_FILTER filter )
|
|
{
|
|
LPTOP_LEVEL_EXCEPTION_FILTER old = top_filter;
|
|
top_filter = filter;
|
|
return old;
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* FatalAppExitA (KERNEL32.@)
|
|
*/
|
|
void WINAPI FatalAppExitA( UINT action, LPCSTR str )
|
|
{
|
|
HMODULE mod = GetModuleHandleA( "user32.dll" );
|
|
MessageBoxA_funcptr pMessageBoxA = NULL;
|
|
|
|
WARN("AppExit\n");
|
|
|
|
if (mod) pMessageBoxA = (MessageBoxA_funcptr)GetProcAddress( mod, "MessageBoxA" );
|
|
if (pMessageBoxA) pMessageBoxA( 0, str, NULL, MB_SYSTEMMODAL | MB_OK );
|
|
else ERR( "%s\n", debugstr_a(str) );
|
|
ExitProcess(0);
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
* FatalAppExitW (KERNEL32.@)
|
|
*/
|
|
void WINAPI FatalAppExitW( UINT action, LPCWSTR str )
|
|
{
|
|
HMODULE mod = GetModuleHandleA( "user32.dll" );
|
|
MessageBoxW_funcptr pMessageBoxW = NULL;
|
|
|
|
WARN("AppExit\n");
|
|
|
|
if (mod) pMessageBoxW = (MessageBoxW_funcptr)GetProcAddress( mod, "MessageBoxW" );
|
|
if (pMessageBoxW) pMessageBoxW( 0, str, NULL, MB_SYSTEMMODAL | MB_OK );
|
|
else ERR( "%s\n", debugstr_w(str) );
|
|
ExitProcess(0);
|
|
}
|