public static void RhRethrow(ref ExInfo activeExInfo, ref ExInfo exInfo)
{
// trigger a GC (only if gcstress) to ensure we can stackwalk at this point
GCStress.TriggerGC();
InternalCalls.RhpValidateExInfoStack();
// We need to copy the Exception object to this stack location because collided unwinds will cause
// the original stack location to go dead.
Exception rethrownException = activeExInfo.ThrownException;
exInfo.Init(rethrownException, ref activeExInfo);
DispatchEx(ref exInfo._frameIter, ref exInfo, activeExInfo._idxCurClause);
BinderIntrinsics.DebugBreak();
}
public static void RhThrowHwEx(uint exceptionCode, ref ExInfo exInfo)
{
// trigger a GC (only if gcstress) to ensure we can stackwalk at this point
GCStress.TriggerGC();
InternalCalls.RhpValidateExInfoStack();
IntPtr faultingCodeAddress = exInfo._pExContext->IP;
ExceptionIDs exceptionId;
switch (exceptionCode)
{
case (uint)HwExceptionCode.STATUS_REDHAWK_NULL_REFERENCE:
exceptionId = ExceptionIDs.NullReference;
break;
case (uint)HwExceptionCode.STATUS_DATATYPE_MISALIGNMENT:
exceptionId = ExceptionIDs.DataMisaligned;
break;
// N.B. -- AVs that have a read/write address lower than 64k are already transformed to
// HwExceptionCode.REDHAWK_NULL_REFERENCE prior to calling this routine.
case (uint)HwExceptionCode.STATUS_ACCESS_VIOLATION:
exceptionId = ExceptionIDs.AccessViolation;
break;
case (uint)HwExceptionCode.STATUS_INTEGER_DIVIDE_BY_ZERO:
exceptionId = ExceptionIDs.DivideByZero;
break;
default:
// We don't wrap SEH exceptions from foreign code like CLR does, so we believe that we
// know the complete set of HW faults generated by managed code and do not need to handle
// this case.
FailFastViaClasslib(RhFailFastReason.InternalError, null, faultingCodeAddress);
exceptionId = ExceptionIDs.NullReference;
break;
}
Exception exceptionToThrow = GetClasslibException(exceptionId, faultingCodeAddress);
exInfo.Init(exceptionToThrow);
DispatchEx(ref exInfo._frameIter, ref exInfo, MaxTryRegionIdx);
BinderIntrinsics.DebugBreak();
}
static public /*internal*/ unsafe object CheckCastInterface(Object obj, void *pvTargetEEType)
{
// a null value can be cast to anything
if (obj == null)
{
return(null);
}
EEType *pTargetType = (EEType *)pvTargetEEType;
EEType *pObjType = obj.EEType;
if (ImplementsInterface(pObjType, pTargetType))
{
return(obj);
}
Exception castError = null;
// If object type implements ICastable then there's one more way to check whether it implements
// the interface.
if (pObjType->IsICastable)
{
// Call the ICastable.IsInstanceOfInterface method directly rather than via an interface
// dispatch since we know the method address statically.
IntPtr pfnIsInstanceOfInterface = pObjType->ICastableIsInstanceOfInterfaceMethod;
if (CalliIntrinsics.Call <bool>(pfnIsInstanceOfInterface, obj, pTargetType, out castError))
{
return(obj);
}
}
// Throw the invalid cast exception defined by the classlib, using the input EEType* to find the
// correct classlib unless ICastable.IsInstanceOfInterface returned a more specific exception for
// us to use.
IntPtr addr = ((EEType *)pvTargetEEType)->GetAssociatedModuleAddress();
if (castError == null)
{
castError = EH.GetClasslibException(ExceptionIDs.InvalidCast, addr);
}
BinderIntrinsics.TailCall_RhpThrowEx(castError);
throw castError;
}
public static IntPtr RhHandleAllocVariable(object value, uint type)
{
IntPtr h = InternalCalls.RhpHandleAllocVariable(value, type);
if (h == IntPtr.Zero)
{
// Throw the out of memory exception defined by the classlib, using the return address of this method
// to find the correct classlib.
ExceptionIDs exID = ExceptionIDs.OutOfMemory;
IntPtr returnAddr = BinderIntrinsics.GetReturnAddress();
Exception e = EH.GetClasslibException(exID, returnAddr);
throw e;
}
return(h);
}
public static IntPtr RhHandleAllocDependent(object primary, object secondary)
{
IntPtr h = InternalCalls.RhpHandleAllocDependent(primary, secondary);
if (h == IntPtr.Zero)
{
// Throw the out of memory exception defined by the classlib, using the return address of this method
// to find the correct classlib.
ExceptionIDs exID = ExceptionIDs.OutOfMemory;
IntPtr returnAddr = BinderIntrinsics.GetReturnAddress();
Exception e = EH.GetClasslibException(exID, returnAddr);
throw e;
}
return(h);
}
public static void RhThrowEx(Exception exceptionObj, ref ExInfo exInfo)
{
// trigger a GC (only if gcstress) to ensure we can stackwalk at this point
GCStress.TriggerGC();
InternalCalls.RhpValidateExInfoStack();
// Transform attempted throws of null to a throw of NullReferenceException.
if (exceptionObj == null)
{
IntPtr faultingCodeAddress = exInfo._pExContext->IP;
exceptionObj = GetClasslibException(ExceptionIDs.NullReference, faultingCodeAddress);
}
exInfo.Init(exceptionObj);
DispatchEx(ref exInfo._frameIter, ref exInfo, MaxTryRegionIdx);
BinderIntrinsics.DebugBreak();
}
static public unsafe void RhUnboxNullable(ref Hack_o_p data, EETypePtr pUnboxToEEType, Object obj)
{
EEType *ptrUnboxToEEType = (EEType *)pUnboxToEEType.ToPointer();
// HACK: we would really want to take the address of o here,
// but the rules of the C# language don't let us do that,
// so we arrive at the same result by taking the address of p
// and going back one pointer-sized unit
fixed(IntPtr *pData = &data.p)
{
if ((obj != null) && (obj.EEType != ptrUnboxToEEType->GetNullableType()))
{
Exception e = ptrUnboxToEEType->GetClasslibException(ExceptionIDs.InvalidCast);
BinderIntrinsics.TailCall_RhpThrowEx(e);
}
InternalCalls.RhUnbox(obj, pData - 1, ptrUnboxToEEType);
}
}
public static void RhpReversePInvokeBadTransition()
{
IntPtr returnAddress = BinderIntrinsics.GetReturnAddress();
if (returnAddress != IntPtr.Zero)
{
EH.FailFastViaClasslib(
RhFailFastReason.IllegalNativeCallableEntry,
null,
returnAddress);
}
else
{
// @HACKHACK: we need to force the method to have an EBP frame so that we can use the
// GetReturnAddress() intrinsic above. This seems to be the smallest way to do this.
EH.FailFast(RhFailFastReason.InternalError, null);
throw EH.GetClasslibException(ExceptionIDs.Arithmetic, returnAddress);
}
}
public unsafe static void RhUnboxAny(object o, ref Hack_o_p data, EETypePtr pUnboxToEEType)
{
EEType *ptrUnboxToEEType = (EEType *)pUnboxToEEType.ToPointer();
if (ptrUnboxToEEType->IsValueType)
{
// HACK: we would really want to take the address of o here,
// but the rules of the C# language don't let us do that,
// so we arrive at the same result by taking the address of p
// and going back one pointer-sized unit
fixed(IntPtr *pData = &data.p)
{
bool isValid = false;
if (ptrUnboxToEEType->IsNullable)
{
isValid = (o == null) || (o.EEType == ptrUnboxToEEType->GetNullableType());
}
else
{
isValid = (o != null && o.EEType->CorElementType == ptrUnboxToEEType->CorElementType && TypeCast.IsInstanceOfClass(o, ptrUnboxToEEType) != null);
}
if (!isValid)
{
// Throw the invalid cast exception defined by the classlib, using the input unbox EEType*
// to find the correct classlib.
ExceptionIDs exID = o == null ? ExceptionIDs.NullReference : ExceptionIDs.InvalidCast;
IntPtr addr = ptrUnboxToEEType->GetAssociatedModuleAddress();
Exception e = EH.GetClasslibException(exID, addr);
BinderIntrinsics.TailCall_RhpThrowEx(e);
}
InternalCalls.RhUnbox(o, pData - 1, ptrUnboxToEEType);
}
}
else
{
data.o = o;
}
}
static public unsafe void *RhUnbox2(EETypePtr pUnboxToEEType, Object obj)
{
EEType *ptrUnboxToEEType = (EEType *)pUnboxToEEType.ToPointer();
if (obj.EEType != ptrUnboxToEEType)
{
// We allow enums and their primtive type to be interchangable
if (obj.EEType->CorElementType != ptrUnboxToEEType->CorElementType)
{
Exception e = ptrUnboxToEEType->GetClasslibException(ExceptionIDs.InvalidCast);
BinderIntrinsics.TailCall_RhpThrowEx(e);
}
}
fixed(void *pObject = &obj.m_pEEType)
{
// CORERT-TODO: This code has GC hole - the method return type should really be byref.
// Requires byref returns in C# to fix cleanly (https://github.com/dotnet/roslyn/issues/118)
return((IntPtr *)pObject + 1);
}
}
static public /*internal*/ unsafe void CheckUnbox(Object obj, byte expectedCorElementType)
{
if (obj == null)
{
return;
}
if (obj.EEType->CorElementType == (CorElementType)expectedCorElementType)
{
return;
}
// Throw the invalid cast exception defined by the classlib, using the input object's EEType*
// to find the correct classlib.
ExceptionIDs exID = ExceptionIDs.InvalidCast;
IntPtr addr = obj.EEType->GetAssociatedModuleAddress();
Exception e = EH.GetClasslibException(exID, addr);
BinderIntrinsics.TailCall_RhpThrowEx(e);
}
static public /*internal*/ unsafe void CheckArrayStore(object array, object obj)
{
if (array == null || obj == null)
{
return;
}
Debug.Assert(array.EEType->IsArray, "first argument must be an array");
EEType *arrayElemType = array.EEType->RelatedParameterType;
bool compatible;
if (arrayElemType->IsInterface)
{
compatible = IsInstanceOfInterface(obj, arrayElemType) != null;
}
else if (arrayElemType->IsArray)
{
compatible = IsInstanceOfArray(obj, arrayElemType) != null;
}
else
{
compatible = IsInstanceOfClass(obj, arrayElemType) != null;
}
if (!compatible)
{
// Throw the array type mismatch exception defined by the classlib, using the input array's EEType*
// to find the correct classlib.
ExceptionIDs exID = ExceptionIDs.ArrayTypeMismatch;
IntPtr addr = array.EEType->GetAssociatedModuleAddress();
Exception e = EH.GetClasslibException(exID, addr);
BinderIntrinsics.TailCall_RhpThrowEx(e);
}
}
static public /*internal*/ unsafe void CheckVectorElemAddr(void *pvElemType, object array)
{
if (array == null)
{
return;
}
Debug.Assert(array.EEType->IsArray, "second argument must be an array");
EEType *elemType = (EEType *)pvElemType;
EEType *arrayElemType = array.EEType->RelatedParameterType;
if (!AreTypesEquivalentInternal(elemType, arrayElemType))
{
// Throw the array type mismatch exception defined by the classlib, using the input array's EEType*
// to find the correct classlib.
ExceptionIDs exID = ExceptionIDs.ArrayTypeMismatch;
IntPtr addr = array.EEType->GetAssociatedModuleAddress();
Exception e = EH.GetClasslibException(exID, addr);
BinderIntrinsics.TailCall_RhpThrowEx(e);
}
}
private static void DispatchEx(ref StackFrameIterator frameIter, ref ExInfo exInfo, uint startIdx)
{
Debug.Assert(exInfo._passNumber == 1, "expected asm throw routine to set the pass");
Exception exceptionObj = exInfo.ThrownException;
// ------------------------------------------------
//
// First pass
//
// ------------------------------------------------
UIntPtr handlingFrameSP = MaxSP;
byte * pCatchHandler = null;
uint catchingTryRegionIdx = MaxTryRegionIdx;
bool isFirstRethrowFrame = (startIdx != MaxTryRegionIdx);
bool isFirstFrame = true;
UIntPtr prevFramePtr = UIntPtr.Zero;
bool unwoundReversePInvoke = false;
bool isValid = frameIter.Init(exInfo._pExContext);
Debug.Assert(isValid, "RhThrowEx called with an unexpected context");
DebuggerNotify.BeginFirstPass(exceptionObj, frameIter.ControlPC, frameIter.SP);
for (; isValid; isValid = frameIter.Next(out startIdx, out unwoundReversePInvoke))
{
// For GC stackwalking, we'll happily walk across native code blocks, but for EH dispatch, we
// disallow dispatching exceptions across native code.
if (unwoundReversePInvoke)
{
break;
}
DebugScanCallFrame(exInfo._passNumber, frameIter.ControlPC, frameIter.SP);
// A debugger can subscribe to get callbacks at a specific frame of exception dispatch
// exInfo._notifyDebuggerSP can be populated by the debugger from out of process
// at any time.
if (exInfo._notifyDebuggerSP == frameIter.SP)
{
DebuggerNotify.FirstPassFrameEntered(exceptionObj, frameIter.ControlPC, frameIter.SP);
}
UpdateStackTrace(exceptionObj, ref exInfo, ref isFirstRethrowFrame, ref prevFramePtr, ref isFirstFrame);
byte *pHandler;
if (FindFirstPassHandler(exceptionObj, startIdx, ref frameIter,
out catchingTryRegionIdx, out pHandler))
{
handlingFrameSP = frameIter.SP;
pCatchHandler = pHandler;
DebugVerifyHandlingFrame(handlingFrameSP);
break;
}
}
DebuggerNotify.EndFirstPass(exceptionObj, pCatchHandler, handlingFrameSP);
if (pCatchHandler == null)
{
UnhandledExceptionFailFastViaClasslib(
RhFailFastReason.PN_UnhandledException,
exceptionObj,
ref exInfo);
}
// We FailFast above if the exception goes unhandled. Therefore, we cannot run the second pass
// without a catch handler.
Debug.Assert(pCatchHandler != null, "We should have a handler if we're starting the second pass");
DebuggerNotify.BeginSecondPass();
// ------------------------------------------------
//
// Second pass
//
// ------------------------------------------------
// Due to the stackwalker logic, we cannot tolerate triggering a GC from the dispatch code once we
// are in the 2nd pass. This is because the stackwalker applies a particular unwind semantic to
// 'collapse' funclets which gets confused when we walk out of the dispatch code and encounter the
// 'main body' without first encountering the funclet. The thunks used to invoke 2nd-pass
// funclets will always toggle this mode off before invoking them.
InternalCalls.RhpSetThreadDoNotTriggerGC();
exInfo._passNumber = 2;
startIdx = MaxTryRegionIdx;
isValid = frameIter.Init(exInfo._pExContext);
for (; isValid && ((byte *)frameIter.SP <= (byte *)handlingFrameSP); isValid = frameIter.Next(out startIdx))
{
Debug.Assert(isValid, "second-pass EH unwind failed unexpectedly");
DebugScanCallFrame(exInfo._passNumber, frameIter.ControlPC, frameIter.SP);
if (frameIter.SP == handlingFrameSP)
{
// invoke only a partial second-pass here...
InvokeSecondPass(ref exInfo, startIdx, catchingTryRegionIdx);
break;
}
InvokeSecondPass(ref exInfo, startIdx);
}
// ------------------------------------------------
//
// Call the handler and resume execution
//
// ------------------------------------------------
exInfo._idxCurClause = catchingTryRegionIdx;
InternalCalls.RhpCallCatchFunclet(
exceptionObj, pCatchHandler, frameIter.RegisterSet, ref exInfo);
// currently, RhpCallCatchFunclet will resume after the catch
Debug.Assert(false, "unreachable");
BinderIntrinsics.DebugBreak();
}
internal static void FailFast(RhFailFastReason reason, Exception unhandledException)
{
BinderIntrinsics.DebugBreak();
}