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reactos/dll/win32/kernel32/client/except.c
Timo Kreuzer 41c99aa60a [KERNEL32] Fix RaiseException to correctly copy the passed in parameters as ULONG_PTR 
Fixes C++ exception handling on x64.
2023-09-21 21:33:47 +03:00

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: dll/win32/kernel32/client/except.c
* PURPOSE: Exception functions
* PROGRAMMER: Ariadne (ariadne@xs4all.nl)
* Modified from WINE [ Onno Hovers, (onno@stack.urc.tue.nl) ]
* UPDATE HISTORY:
* Created 01/11/98
*/
/* INCLUDES *******************************************************************/
#include <k32.h>
#include <strsafe.h>
#define NDEBUG
#include <debug.h>
/*
* Private helper function to lookup the module name from a given address.
* The address can point to anywhere within the module.
*/
static const char*
_module_name_from_addr(const void* addr, void **module_start_addr,
char* psz, size_t nChars, char** module_name)
{
MEMORY_BASIC_INFORMATION mbi;
if ((nChars > MAXDWORD) ||
(VirtualQuery(addr, &mbi, sizeof(mbi)) != sizeof(mbi)) ||
!GetModuleFileNameA((HMODULE)mbi.AllocationBase, psz, (DWORD)nChars))
{
psz[0] = '\0';
*module_name = psz;
*module_start_addr = 0;
}
else
{
char* s1 = strrchr(psz, '\\'), *s2 = strrchr(psz, '/');
if (s2 && !s1)
s1 = s2;
else if (s1 && s2 && s1 < s2)
s1 = s2;
if (!s1)
s1 = psz;
else
s1++;
*module_name = s1;
*module_start_addr = (void *)mbi.AllocationBase;
}
return psz;
}
static VOID
_dump_context(PCONTEXT pc)
{
#ifdef _M_IX86
/*
* Print out the CPU registers
*/
DbgPrint("CS:EIP %x:%x\n", pc->SegCs&0xffff, pc->Eip );
DbgPrint("DS %x ES %x FS %x GS %x\n", pc->SegDs&0xffff, pc->SegEs&0xffff,
pc->SegFs&0xffff, pc->SegGs&0xfff);
DbgPrint("EAX: %.8x EBX: %.8x ECX: %.8x\n", pc->Eax, pc->Ebx, pc->Ecx);
DbgPrint("EDX: %.8x EBP: %.8x ESI: %.8x ESP: %.8x\n", pc->Edx,
pc->Ebp, pc->Esi, pc->Esp);
DbgPrint("EDI: %.8x EFLAGS: %.8x\n", pc->Edi, pc->EFlags);
#elif defined(_M_AMD64)
DbgPrint("CS:RIP %x:%I64x\n", pc->SegCs&0xffff, pc->Rip );
DbgPrint("DS %x ES %x FS %x GS %x\n", pc->SegDs&0xffff, pc->SegEs&0xffff,
pc->SegFs&0xffff, pc->SegGs&0xfff);
DbgPrint("RAX: %I64x RBX: %I64x RCX: %I64x RDI: %I64x\n", pc->Rax, pc->Rbx, pc->Rcx, pc->Rdi);
DbgPrint("RDX: %I64x RBP: %I64x RSI: %I64x RSP: %I64x\n", pc->Rdx, pc->Rbp, pc->Rsi, pc->Rsp);
DbgPrint("R8: %I64x R9: %I64x R10: %I64x R11: %I64x\n", pc->R8, pc->R9, pc->R10, pc->R11);
DbgPrint("R12: %I64x R13: %I64x R14: %I64x R15: %I64x\n", pc->R12, pc->R13, pc->R14, pc->R15);
DbgPrint("EFLAGS: %.8x\n", pc->EFlags);
#elif defined(_M_ARM)
DbgPrint("PC: %08lx LR: %08lx SP: %08lx\n", pc->Pc);
DbgPrint("R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n", pc->R0, pc->R1, pc->R2, pc->R3);
DbgPrint("R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n", pc->R4, pc->R5, pc->R6, pc->R7);
DbgPrint("R8: %08lx R9: %08lx R10: %08lx R11: %08lx\n", pc->R8, pc->R9, pc->R10, pc->R11);
DbgPrint("R12: %08lx CPSR: %08lx FPSCR: %08lx\n", pc->R12, pc->Cpsr, pc->R1, pc->Fpscr, pc->R3);
#else
#error "Unknown architecture"
#endif
}
static VOID
PrintStackTrace(IN PEXCEPTION_POINTERS ExceptionInfo)
{
PVOID StartAddr;
CHAR szMod[128] = "", *szModFile;
PEXCEPTION_RECORD ExceptionRecord = ExceptionInfo->ExceptionRecord;
PCONTEXT ContextRecord = ExceptionInfo->ContextRecord;
/* Print a stack trace */
DbgPrint("Unhandled exception\n");
DbgPrint("ExceptionCode: %8x\n", ExceptionRecord->ExceptionCode);
if (ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION &&
ExceptionRecord->NumberParameters == 2)
{
DbgPrint("Faulting Address: %p\n", (PVOID)ExceptionRecord->ExceptionInformation[1]);
}
/* Trace the wine special error and show the modulename and functionname */
if (ExceptionRecord->ExceptionCode == 0x80000100 /* EXCEPTION_WINE_STUB */ &&
ExceptionRecord->NumberParameters == 2)
{
DbgPrint("Missing function: %s!%s\n", (PSZ)ExceptionRecord->ExceptionInformation[0], (PSZ)ExceptionRecord->ExceptionInformation[1]);
}
_dump_context(ContextRecord);
_module_name_from_addr(ExceptionRecord->ExceptionAddress, &StartAddr, szMod, sizeof(szMod), &szModFile);
DbgPrint("Address:\n<%s:%x> (%s@%x)\n",
szModFile,
(ULONG_PTR)ExceptionRecord->ExceptionAddress - (ULONG_PTR)StartAddr,
szMod,
StartAddr);
#ifdef _M_IX86
DbgPrint("Frames:\n");
_SEH2_TRY
{
UINT i;
PULONG Frame = (PULONG)ContextRecord->Ebp;
for (i = 0; Frame[1] != 0 && Frame[1] != 0xdeadbeef && i < 128; i++)
{
if (IsBadReadPtr((PVOID)Frame[1], 4))
{
DbgPrint("<%s:%x>\n", "[invalid address]", Frame[1]);
}
else
{
_module_name_from_addr((const void*)Frame[1], &StartAddr,
szMod, sizeof(szMod), &szModFile);
DbgPrint("<%s:%x> (%s@%x)\n",
szModFile,
(ULONG_PTR)Frame[1] - (ULONG_PTR)StartAddr,
szMod,
StartAddr);
}
if (IsBadReadPtr((PVOID)Frame[0], sizeof(*Frame) * 2))
break;
Frame = (PULONG)Frame[0];
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
DbgPrint("<error dumping stack trace: 0x%x>\n", _SEH2_GetExceptionCode());
}
_SEH2_END;
#endif
}
/* GLOBALS ********************************************************************/
LPTOP_LEVEL_EXCEPTION_FILTER GlobalTopLevelExceptionFilter;
DWORD g_dwLastErrorToBreakOn;
/* FUNCTIONS ******************************************************************/
LONG
WINAPI
BasepCheckForReadOnlyResource(IN PVOID Ptr)
{
PVOID Data;
ULONG Size, OldProtect;
SIZE_T Size2;
MEMORY_BASIC_INFORMATION mbi;
NTSTATUS Status;
LONG Ret = EXCEPTION_CONTINUE_SEARCH;
/* Check if it was an attempt to write to a read-only image section! */
Status = NtQueryVirtualMemory(NtCurrentProcess(),
Ptr,
MemoryBasicInformation,
&mbi,
sizeof(mbi),
NULL);
if (NT_SUCCESS(Status) &&
mbi.Protect == PAGE_READONLY && mbi.Type == MEM_IMAGE)
{
/* Attempt to treat it as a resource section. We need to
use SEH here because we don't know if it's actually a
resource mapping */
_SEH2_TRY
{
Data = RtlImageDirectoryEntryToData(mbi.AllocationBase,
TRUE,
IMAGE_DIRECTORY_ENTRY_RESOURCE,
&Size);
if (Data != NULL &&
(ULONG_PTR)Ptr >= (ULONG_PTR)Data &&
(ULONG_PTR)Ptr < (ULONG_PTR)Data + Size)
{
/* The user tried to write into the resources. Make the page
writable... */
Size2 = 1;
Status = NtProtectVirtualMemory(NtCurrentProcess(),
&Ptr,
&Size2,
PAGE_READWRITE,
&OldProtect);
if (NT_SUCCESS(Status))
{
Ret = EXCEPTION_CONTINUE_EXECUTION;
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
}
_SEH2_END;
}
return Ret;
}
UINT
WINAPI
GetErrorMode(VOID)
{
NTSTATUS Status;
UINT ErrMode;
/* Query the current setting */
Status = NtQueryInformationProcess(NtCurrentProcess(),
ProcessDefaultHardErrorMode,
&ErrMode,
sizeof(ErrMode),
NULL);
if (!NT_SUCCESS(Status))
{
/* Fail if we couldn't query */
BaseSetLastNTError(Status);
return 0;
}
/* Check if NOT failing critical errors was requested */
if (ErrMode & SEM_FAILCRITICALERRORS)
{
/* Mask it out, since the native API works differently */
ErrMode &= ~SEM_FAILCRITICALERRORS;
}
else
{
/* OR it if the caller didn't, due to different native semantics */
ErrMode |= SEM_FAILCRITICALERRORS;
}
/* Return the mode */
return ErrMode;
}
/*
* @implemented
*/
LONG
WINAPI
UnhandledExceptionFilter(IN PEXCEPTION_POINTERS ExceptionInfo)
{
static UNICODE_STRING AeDebugKey =
RTL_CONSTANT_STRING(L"\\Registry\\Machine\\" REGSTR_PATH_AEDEBUG);
static BOOLEAN IsSecondChance = FALSE;
/* Exception data */
NTSTATUS Status;
PEXCEPTION_RECORD ExceptionRecord = ExceptionInfo->ExceptionRecord;
LPTOP_LEVEL_EXCEPTION_FILTER RealFilter;
LONG RetValue;
/* Debugger and hard error parameters */
HANDLE DebugPort = NULL;
ULONG_PTR ErrorParameters[4];
ULONG DebugResponse, ErrorResponse;
/* Post-Mortem "Auto-Execute" (AE) Debugger registry data */
HANDLE KeyHandle;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING ValueString;
ULONG Length;
UCHAR Buffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + MAX_PATH * sizeof(WCHAR)];
PKEY_VALUE_PARTIAL_INFORMATION PartialInfo = (PVOID)Buffer;
BOOLEAN AeDebugAuto = FALSE;
PWCHAR AeDebugPath = NULL;
WCHAR AeDebugCmdLine[MAX_PATH];
/* Debugger process data */
BOOL Success;
HRESULT hr;
ULONG PrependLength;
HANDLE hDebugEvent;
HANDLE WaitHandles[2];
STARTUPINFOW StartupInfo;
PROCESS_INFORMATION ProcessInfo;
/* In case this is a nested exception, just kill the process */
if (ExceptionRecord->ExceptionFlags & EXCEPTION_NESTED_CALL)
{
NtTerminateProcess(NtCurrentProcess(), ExceptionRecord->ExceptionCode);
return EXCEPTION_EXECUTE_HANDLER;
}
if ((ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION) &&
(ExceptionRecord->NumberParameters >= 2))
{
switch (ExceptionRecord->ExceptionInformation[0])
{
case EXCEPTION_WRITE_FAULT:
{
/*
* Change the protection on some write attempts,
* some InstallShield setups have this bug.
*/
RetValue = BasepCheckForReadOnlyResource(
(PVOID)ExceptionRecord->ExceptionInformation[1]);
if (RetValue == EXCEPTION_CONTINUE_EXECUTION)
return EXCEPTION_CONTINUE_EXECUTION;
break;
}
case EXCEPTION_EXECUTE_FAULT:
/* FIXME */
break;
}
}
/* If the process is being debugged, pass the exception to the debugger */
Status = NtQueryInformationProcess(NtCurrentProcess(),
ProcessDebugPort,
&DebugPort,
sizeof(DebugPort),
NULL);
if (NT_SUCCESS(Status) && DebugPort)
{
DPRINT("Passing exception to debugger\n");
return EXCEPTION_CONTINUE_SEARCH;
}
/* No debugger present, let's continue... */
RealFilter = RtlDecodePointer(GlobalTopLevelExceptionFilter);
if (RealFilter)
{
RetValue = RealFilter(ExceptionInfo);
if (RetValue != EXCEPTION_CONTINUE_SEARCH)
return RetValue;
}
/* ReactOS-specific: DPRINT a stack trace */
PrintStackTrace(ExceptionInfo);
/*
* Now pop up an error if needed. Check both the process-wide (Win32)
* and per-thread error-mode flags (NT).
*/
if ((GetErrorMode() & SEM_NOGPFAULTERRORBOX) ||
(RtlGetThreadErrorMode() & RTL_SEM_NOGPFAULTERRORBOX))
{
/* Do not display the pop-up error box, just transfer control to the exception handler */
return EXCEPTION_EXECUTE_HANDLER;
}
/* Save exception code and address */
ErrorParameters[0] = (ULONG_PTR)ExceptionRecord->ExceptionCode;
ErrorParameters[1] = (ULONG_PTR)ExceptionRecord->ExceptionAddress;
if (ExceptionRecord->ExceptionCode == STATUS_IN_PAGE_ERROR)
{
/*
* Get the underlying status code that resulted in the exception,
* and just forget about the type of operation (read/write).
*/
ErrorParameters[2] = ExceptionRecord->ExceptionInformation[2];
}
else // if (ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION) or others...
{
/* Get the type of operation that caused the access violation */
ErrorParameters[2] = ExceptionRecord->ExceptionInformation[0];
}
/* Save faulting address */
ErrorParameters[3] = ExceptionRecord->ExceptionInformation[1];
/*
* Prepare the hard error dialog: default to only OK
* in case we do not have any debugger at our disposal.
*/
DebugResponse = OptionOk;
AeDebugAuto = FALSE;
/*
* Retrieve Post-Mortem Debugger settings from the registry, under:
* HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug
* (REGSTR_PATH_AEDEBUG).
*/
InitializeObjectAttributes(&ObjectAttributes,
&AeDebugKey,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = NtOpenKey(&KeyHandle, KEY_QUERY_VALUE, &ObjectAttributes);
if (NT_SUCCESS(Status))
{
/*
* Read the 'Auto' REG_SZ value:
* "0" (or any other value): Prompt the user for starting the debugger.
* "1": Start the debugger without prompting.
*/
RtlInitUnicodeString(&ValueString, REGSTR_VAL_AEDEBUG_AUTO);
Status = NtQueryValueKey(KeyHandle,
&ValueString,
KeyValuePartialInformation,
PartialInfo,
sizeof(Buffer),
&Length);
if (NT_SUCCESS(Status) && (PartialInfo->Type == REG_SZ))
{
AeDebugAuto = (*(PWCHAR)PartialInfo->Data == L'1');
}
else
{
AeDebugAuto = FALSE;
}
/*
* Read and store the 'Debugger' REG_SZ value. Its usual format is:
* C:\dbgtools\ntsd.exe -p %ld -e %ld -g
* with the first and second parameters being respectively
* the process ID and a notification event handle.
*/
RtlInitUnicodeString(&ValueString, REGSTR_VAL_AEDEBUG_DEBUGGER);
Status = NtQueryValueKey(KeyHandle,
&ValueString,
KeyValuePartialInformation,
PartialInfo,
sizeof(Buffer),
&Length);
if (NT_SUCCESS(Status) && (PartialInfo->Type == REG_SZ))
{
/* We hope the string is NULL-terminated */
AeDebugPath = (PWCHAR)PartialInfo->Data;
/* Skip any prepended whitespace */
while ( *AeDebugPath &&
((*AeDebugPath == L' ') ||
(*AeDebugPath == L'\t')) ) // iswspace(*AeDebugPath)
{
++AeDebugPath;
}
if (*AeDebugPath)
{
/* We have a debugger path, we can prompt the user to debug the program */
DebugResponse = OptionOkCancel;
}
else
{
/* We actually do not have anything, reset the pointer */
AeDebugPath = NULL;
}
}
else
{
AeDebugPath = NULL;
}
NtClose(KeyHandle);
}
// TODO: Start a ReactOS Fault Reporter (unimplemented!)
//
// For now we are doing the "old way" (aka Win2k), that is also the fallback
// case for Windows XP/2003 in case it does not find faultrep.dll to display
// the nice "Application Error" dialog box: We use a hard error to communicate
// the problem and prompt the user to continue debugging the application or
// to terminate it.
//
// Since Windows XP/2003, we have the ReportFault API available.
// See http://www.clausbrod.de/twiki/pub/Blog/DefinePrivatePublic20070616/reportfault.cpp
// and https://msdn.microsoft.com/en-us/library/windows/desktop/bb513616(v=vs.85).aspx
// and the legacy ReportFault API: https://msdn.microsoft.com/en-us/library/windows/desktop/bb513615(v=vs.85).aspx
//
// NOTE: Starting Vista+, the fault API is constituted of the WerXXX functions.
//
// Also see Vostokov's book "Memory Dump Analysis Anthology Collector's Edition, Volume 1"
// at: https://books.google.fr/books?id=9w2x6NHljg4C&pg=PA115&lpg=PA115
if (!(AeDebugPath && AeDebugAuto))
{
/*
* Either there is no debugger specified, or the debugger should
* not start automatically: display the hard error no matter what.
* For a first chance exception, allow continuing or debugging;
* for a second chance exception, just debug or kill the process.
*/
Status = NtRaiseHardError(STATUS_UNHANDLED_EXCEPTION | HARDERROR_OVERRIDE_ERRORMODE,
4,
0,
ErrorParameters,
(!IsSecondChance ? DebugResponse : OptionOk),
&ErrorResponse);
}
else
{
Status = STATUS_SUCCESS;
ErrorResponse = (AeDebugPath ? ResponseCancel : ResponseOk);
}
/*
* If the user has chosen not to debug the process, or
* if this is a second chance exception, kill the process.
*/
if (!NT_SUCCESS(Status) || (ErrorResponse != ResponseCancel) || IsSecondChance)
goto Quit;
/* If the exception comes from a CSR Server, kill it (this will lead to ReactOS shutdown) */
if (BaseRunningInServerProcess)
{
IsSecondChance = TRUE;
goto Quit;
}
/*
* Attach a debugger to this process. The debugger process is given
* the process ID of the current process to be debugged, as well as
* a notification event handle. After being spawned, the debugger
* initializes and attaches to the process by calling DebugActiveProcess.
* When the debugger is ready, it signals the notification event,
* so that we can give it control over the process being debugged,
* by passing it the exception.
*
* See https://msdn.microsoft.com/en-us/library/ms809754.aspx
* and http://www.debuginfo.com/articles/ntsdwatson.html
* and https://sourceware.org/ml/gdb-patches/2012-08/msg00893.html
* for more details.
*/
/* Create an inheritable notification debug event for the debugger */
InitializeObjectAttributes(&ObjectAttributes,
NULL,
OBJ_INHERIT,
NULL,
NULL);
Status = NtCreateEvent(&hDebugEvent,
EVENT_ALL_ACCESS,
&ObjectAttributes,
NotificationEvent,
FALSE);
if (!NT_SUCCESS(Status))
hDebugEvent = NULL;
/* Build the debugger command line */
Success = FALSE;
/*
* We will add two longs (process ID and event handle) to the command
* line. The biggest 32-bit unsigned int (0xFFFFFFFF == 4.294.967.295)
* takes 10 decimal digits. We then count the terminating NULL.
*/
Length = (ULONG)wcslen(AeDebugPath) + 2*10 + 1;
/* Check whether the debugger path may be a relative path */
if ((*AeDebugPath != L'"') &&
(RtlDetermineDosPathNameType_U(AeDebugPath) == RtlPathTypeRelative))
{
/* Relative path, prepend SystemRoot\System32 */
PrependLength = (ULONG)wcslen(SharedUserData->NtSystemRoot) + 10 /* == wcslen(L"\\System32\\") */;
if (PrependLength + Length <= ARRAYSIZE(AeDebugCmdLine))
{
hr = StringCchPrintfW(AeDebugCmdLine,
PrependLength + 1,
L"%s\\System32\\",
SharedUserData->NtSystemRoot);
Success = SUCCEEDED(hr);
}
}
else
{
/* Full path */
PrependLength = 0;
if (Length <= ARRAYSIZE(AeDebugCmdLine))
Success = TRUE;
}
/* Format the command line */
if (Success)
{
hr = StringCchPrintfW(&AeDebugCmdLine[PrependLength],
Length,
AeDebugPath,
HandleToUlong(NtCurrentTeb()->ClientId.UniqueProcess), // GetCurrentProcessId()
hDebugEvent);
Success = SUCCEEDED(hr);
}
/* Start the debugger */
if (Success)
{
DPRINT1("\nStarting debugger: '%S'\n", AeDebugCmdLine);
RtlZeroMemory(&StartupInfo, sizeof(StartupInfo));
RtlZeroMemory(&ProcessInfo, sizeof(ProcessInfo));
StartupInfo.cb = sizeof(StartupInfo);
StartupInfo.lpDesktop = L"WinSta0\\Default";
Success = CreateProcessW(NULL,
AeDebugCmdLine,
NULL, NULL,
TRUE, 0,
NULL, NULL,
&StartupInfo, &ProcessInfo);
}
if (Success)
{
WaitHandles[0] = hDebugEvent;
WaitHandles[1] = ProcessInfo.hProcess;
/* Loop until the debugger gets ready or terminates unexpectedly */
do
{
/* Alertable wait */
Status = NtWaitForMultipleObjects(ARRAYSIZE(WaitHandles),
WaitHandles,
WaitAny,
TRUE, NULL);
} while ((Status == STATUS_ALERTED) || (Status == STATUS_USER_APC));
/*
* The debugger terminated unexpectedly and we cannot attach to it.
* Kill the process being debugged.
*/
if (Status == STATUS_WAIT_1)
{
/* Be sure there is no other debugger attached */
Status = NtQueryInformationProcess(NtCurrentProcess(),
ProcessDebugPort,
&DebugPort,
sizeof(DebugPort),
NULL);
if (!NT_SUCCESS(Status) || !DebugPort)
{
/* No debugger is attached, kill the process at next round */
IsSecondChance = TRUE;
}
}
CloseHandle(ProcessInfo.hThread);
CloseHandle(ProcessInfo.hProcess);
if (hDebugEvent)
NtClose(hDebugEvent);
return EXCEPTION_CONTINUE_SEARCH;
}
/* We failed starting the debugger, close the event handle and kill the process */
if (hDebugEvent)
NtClose(hDebugEvent);
IsSecondChance = TRUE;
Quit:
/* If this is a second chance exception, kill the process */
if (IsSecondChance)
NtTerminateProcess(NtCurrentProcess(), ExceptionRecord->ExceptionCode);
/* Otherwise allow handling exceptions in first chance */
/*
* Returning EXCEPTION_EXECUTE_HANDLER means that the code in
* the __except block will be executed. Normally this will end up in a
* Terminate process.
*/
return EXCEPTION_EXECUTE_HANDLER;
}
/*
* @implemented
*/
VOID
WINAPI
RaiseException(
_In_ DWORD dwExceptionCode,
_In_ DWORD dwExceptionFlags,
_In_ DWORD nNumberOfArguments,
_In_opt_ const ULONG_PTR *lpArguments)
{
EXCEPTION_RECORD ExceptionRecord;
/* Setup the exception record */
RtlZeroMemory(&ExceptionRecord, sizeof(ExceptionRecord));
ExceptionRecord.ExceptionCode = dwExceptionCode;
ExceptionRecord.ExceptionRecord = NULL;
ExceptionRecord.ExceptionAddress = (PVOID)RaiseException;
ExceptionRecord.ExceptionFlags = dwExceptionFlags & EXCEPTION_NONCONTINUABLE;
/* Check if we have arguments */
if (!lpArguments)
{
/* We don't */
ExceptionRecord.NumberParameters = 0;
}
else
{
/* We do, normalize the count */
if (nNumberOfArguments > EXCEPTION_MAXIMUM_PARAMETERS)
nNumberOfArguments = EXCEPTION_MAXIMUM_PARAMETERS;
/* Set the count of parameters and copy them */
ExceptionRecord.NumberParameters = nNumberOfArguments;
RtlCopyMemory(ExceptionRecord.ExceptionInformation,
lpArguments,
nNumberOfArguments * sizeof(ULONG_PTR));
}
/* Better handling of Delphi Exceptions... a ReactOS Hack */
if (dwExceptionCode == 0xeedface || dwExceptionCode == 0xeedfade)
{
DPRINT1("Delphi Exception at address: %p\n", ExceptionRecord.ExceptionInformation[0]);
DPRINT1("Exception-Object: %p\n", ExceptionRecord.ExceptionInformation[1]);
DPRINT1("Exception text: %lx\n", ExceptionRecord.ExceptionInformation[2]);
}
/* Raise the exception */
RtlRaiseException(&ExceptionRecord);
}
/*
* @implemented
*/
UINT
WINAPI
SetErrorMode(IN UINT uMode)
{
UINT PrevErrMode, NewMode;
/* Get the previous mode */
PrevErrMode = GetErrorMode();
NewMode = uMode;
/* Check if failing critical errors was requested */
if (NewMode & SEM_FAILCRITICALERRORS)
{
/* Mask it out, since the native API works differently */
NewMode &= ~SEM_FAILCRITICALERRORS;
}
else
{
/* OR it if the caller didn't, due to different native semantics */
NewMode |= SEM_FAILCRITICALERRORS;
}
/* Always keep no alignment faults if they were set */
NewMode |= (PrevErrMode & SEM_NOALIGNMENTFAULTEXCEPT);
/* Set the new mode */
NtSetInformationProcess(NtCurrentProcess(),
ProcessDefaultHardErrorMode,
(PVOID)&NewMode,
sizeof(NewMode));
/* Return the previous mode */
return PrevErrMode;
}
/*
* @implemented
*/
LPTOP_LEVEL_EXCEPTION_FILTER
WINAPI
DECLSPEC_HOTPATCH
SetUnhandledExceptionFilter(IN LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter)
{
PVOID EncodedPointer, EncodedOldPointer;
EncodedPointer = RtlEncodePointer(lpTopLevelExceptionFilter);
EncodedOldPointer = InterlockedExchangePointer((PVOID*)&GlobalTopLevelExceptionFilter,
EncodedPointer);
return RtlDecodePointer(EncodedOldPointer);
}
/*
* @implemented
*/
BOOL
WINAPI
IsBadReadPtr(IN LPCVOID lp,
IN UINT_PTR ucb)
{
ULONG PageSize;
BOOLEAN Result = FALSE;
volatile CHAR *Current;
PCHAR Last;
/* Quick cases */
if (!ucb) return FALSE;
if (!lp) return TRUE;
/* Get the page size */
PageSize = BaseStaticServerData->SysInfo.PageSize;
/* Calculate start and end */
Current = (volatile CHAR*)lp;
Last = (PCHAR)((ULONG_PTR)lp + ucb - 1);
/* Another quick failure case */
if (Last < Current) return TRUE;
/* Enter SEH */
_SEH2_TRY
{
/* Do an initial probe */
*Current;
/* Align the addresses */
Current = (volatile CHAR *)ALIGN_DOWN_POINTER_BY(Current, PageSize);
Last = (PCHAR)ALIGN_DOWN_POINTER_BY(Last, PageSize);
/* Probe the entire range */
while (Current != Last)
{
Current += PageSize;
*Current;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* We hit an exception, so return true */
Result = TRUE;
}
_SEH2_END
/* Return exception status */
return Result;
}
/*
* @implemented
*/
BOOL
NTAPI
IsBadHugeReadPtr(LPCVOID lp,
UINT_PTR ucb)
{
/* Implementation is the same on 32-bit */
return IsBadReadPtr(lp, ucb);
}
/*
* @implemented
*/
BOOL
NTAPI
IsBadCodePtr(FARPROC lpfn)
{
/* Executing has the same privileges as reading */
return IsBadReadPtr((LPVOID)lpfn, 1);
}
/*
* @implemented
*/
BOOL
NTAPI
IsBadWritePtr(IN LPVOID lp,
IN UINT_PTR ucb)
{
ULONG PageSize;
BOOLEAN Result = FALSE;
volatile CHAR *Current;
PCHAR Last;
/* Quick cases */
if (!ucb) return FALSE;
if (!lp) return TRUE;
/* Get the page size */
PageSize = BaseStaticServerData->SysInfo.PageSize;
/* Calculate start and end */
Current = (volatile CHAR*)lp;
Last = (PCHAR)((ULONG_PTR)lp + ucb - 1);
/* Another quick failure case */
if (Last < Current) return TRUE;
/* Enter SEH */
_SEH2_TRY
{
/* Do an initial probe */
*Current = *Current;
/* Align the addresses */
Current = (volatile CHAR *)ALIGN_DOWN_POINTER_BY(Current, PageSize);
Last = (PCHAR)ALIGN_DOWN_POINTER_BY(Last, PageSize);
/* Probe the entire range */
while (Current != Last)
{
Current += PageSize;
*Current = *Current;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* We hit an exception, so return true */
Result = TRUE;
}
_SEH2_END
/* Return exception status */
return Result;
}
/*
* @implemented
*/
BOOL
NTAPI
IsBadHugeWritePtr(IN LPVOID lp,
IN UINT_PTR ucb)
{
/* Implementation is the same on 32-bit */
return IsBadWritePtr(lp, ucb);
}
/*
* @implemented
*/
BOOL
NTAPI
IsBadStringPtrW(IN LPCWSTR lpsz,
IN UINT_PTR ucchMax)
{
BOOLEAN Result = FALSE;
volatile WCHAR *Current;
PWCHAR Last;
WCHAR Char;
/* Quick cases */
if (!ucchMax) return FALSE;
if (!lpsz) return TRUE;
/* Calculate start and end */
Current = (volatile WCHAR*)lpsz;
Last = (PWCHAR)((ULONG_PTR)lpsz + (ucchMax * 2) - 2);
/* Enter SEH */
_SEH2_TRY
{
/* Probe the entire range */
Char = *Current++;
while ((Char) && (Current != Last)) Char = *Current++;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* We hit an exception, so return true */
Result = TRUE;
}
_SEH2_END
/* Return exception status */
return Result;
}
/*
* @implemented
*/
BOOL
NTAPI
IsBadStringPtrA(IN LPCSTR lpsz,
IN UINT_PTR ucchMax)
{
BOOLEAN Result = FALSE;
volatile CHAR *Current;
PCHAR Last;
CHAR Char;
/* Quick cases */
if (!ucchMax) return FALSE;
if (!lpsz) return TRUE;
/* Calculate start and end */
Current = (volatile CHAR*)lpsz;
Last = (PCHAR)((ULONG_PTR)lpsz + ucchMax - 1);
/* Enter SEH */
_SEH2_TRY
{
/* Probe the entire range */
Char = *Current++;
while ((Char) && (Current != Last)) Char = *Current++;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* We hit an exception, so return true */
Result = TRUE;
}
_SEH2_END
/* Return exception status */
return Result;
}
/*
* @implemented
*/
VOID
WINAPI
SetLastError(IN DWORD dwErrCode)
{
/* Break if a debugger requested checking for this error code */
if ((g_dwLastErrorToBreakOn) && (g_dwLastErrorToBreakOn == dwErrCode)) DbgBreakPoint();
/* Set last error if it's a new error */
if (NtCurrentTeb()->LastErrorValue != dwErrCode) NtCurrentTeb()->LastErrorValue = dwErrCode;
}
/*
* @implemented
*/
DWORD
WINAPI
GetLastError(VOID)
{
/* Return the current value */
return NtCurrentTeb()->LastErrorValue;
}
/* EOF */
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