private static bool ShouldTypedClauseCatchThisException(object exception, EEType *pClauseType)
{
if (TypeCast.IsInstanceOfClass(exception, pClauseType) != null)
{
return(true);
}
if (s_pLowLevelObjectType == null)
{
// TODO: Avoid allocating here as that may fail
s_pLowLevelObjectType = new System.Object().EEType;
}
// This allows the typical try { } catch { }--which expands to a typed catch of System.Object--to work on
// all objects when the clause is in the low level runtime code. This special case is needed because
// objects from foreign type systems are sometimes throw back up at runtime code and this is the only way
// to catch them outside of having a filter with no type check in it, which isn't currently possible to
// write in C#. See https://github.com/dotnet/roslyn/issues/4388
if (pClauseType->IsEquivalentTo(s_pLowLevelObjectType))
{
return(true);
}
return(false);
}
private static bool ShouldTypedClauseCatchThisException(object exception, EEType *pClauseType)
{
#if DEBUG && !INPLACE_RUNTIME
AssertNotRuntimeObject(pClauseType);
#endif
return(TypeCast.IsInstanceOfClass(exception, pClauseType) != null);
}
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;
}
}