public static RuntimeSignature CreateFromNativeLayoutSignature(RuntimeSignature oldSignature, uint newNativeLayoutOffset)
{
return(new RuntimeSignature
{
_moduleHandle = oldSignature._moduleHandle,
_tokenOrOffset = (int)newNativeLayoutOffset,
_isNativeLayoutSignature = true,
});
}
private static unsafe IntPtr GVMLookupForSlotWorker(RuntimeTypeHandle type, RuntimeTypeHandle declaringType, RuntimeTypeHandle[] genericArguments, MethodNameAndSignature methodNameAndSignature)
{
bool slotChanged = false;
IntPtr resolution = IntPtr.Zero;
// Otherwise, walk parent hierarchy attempting to resolve
EETypePtr eetype = type.ToEETypePtr();
IntPtr functionPointer = IntPtr.Zero;
IntPtr genericDictionary = IntPtr.Zero;
while (!eetype.IsNull)
{
RuntimeTypeHandle handle = new RuntimeTypeHandle(eetype);
string methodName = methodNameAndSignature.Name;
RuntimeSignature methodSignature = methodNameAndSignature.Signature;
if (RuntimeAugments.TypeLoaderCallbacks.TryGetGenericVirtualTargetForTypeAndSlot(handle, ref declaringType, genericArguments, ref methodName, ref methodSignature, out functionPointer, out genericDictionary, out slotChanged))
{
methodNameAndSignature = new MethodNameAndSignature(methodName, methodSignature);
if (!slotChanged)
{
resolution = FunctionPointerOps.GetGenericMethodFunctionPointer(functionPointer, genericDictionary);
}
break;
}
eetype = eetype.BaseType;
}
// If the current slot to examine has changed, restart the lookup.
// This happens when there is an interface call.
if (slotChanged)
{
return(GVMLookupForSlotWorker(type, declaringType, genericArguments, methodNameAndSignature));
}
if (resolution == IntPtr.Zero)
{
Environment.FailFast("GVM resolution failure");
}
return(resolution);
}
/// <summary>
/// Fast equality check
/// </summary>
public bool StructuralEquals(RuntimeSignature other)
{
if (_moduleHandle != other._moduleHandle)
{
return(false);
}
if (_tokenOrOffset != other._tokenOrOffset)
{
return(false);
}
if (_isNativeLayoutSignature != other._isNativeLayoutSignature)
{
return(false);
}
return(true);
}
public bool Equals(RuntimeSignature other)
{
if (IsNativeLayoutSignature && other.IsNativeLayoutSignature)
{
if ((ModuleHandle == other.ModuleHandle) && (NativeLayoutOffset == other.NativeLayoutOffset))
{
return(true);
}
}
else if (!IsNativeLayoutSignature && !other.IsNativeLayoutSignature)
{
if ((ModuleHandle == other.ModuleHandle) && (Token == other.Token))
{
return(true);
}
}
// Walk both signatures to check for equality the slow way
return(RuntimeAugments.TypeLoaderCallbacks.CompareMethodSignatures(this, other));
}
public MethodNameAndSignature(string name, RuntimeSignature signature)
{
Name = name;
Signature = signature;
}
private static unsafe IntPtr GVMLookupForSlotWorker(RuntimeTypeHandle type, RuntimeTypeHandle declaringType, RuntimeTypeHandle[] genericArguments, MethodNameAndSignature methodNameAndSignature)
{
bool slotChanged = false;
IntPtr resolution = IntPtr.Zero;
IntPtr functionPointer = IntPtr.Zero;
IntPtr genericDictionary = IntPtr.Zero;
bool lookForDefaultImplementations = false;
again:
// Walk parent hierarchy attempting to resolve
EETypePtr eeType = type.ToEETypePtr();
while (!eeType.IsNull)
{
RuntimeTypeHandle handle = new RuntimeTypeHandle(eeType);
string methodName = methodNameAndSignature.Name;
RuntimeSignature methodSignature = methodNameAndSignature.Signature;
if (RuntimeAugments.TypeLoaderCallbacks.TryGetGenericVirtualTargetForTypeAndSlot(handle, ref declaringType, genericArguments, ref methodName, ref methodSignature, lookForDefaultImplementations, out functionPointer, out genericDictionary, out slotChanged))
{
methodNameAndSignature = new MethodNameAndSignature(methodName, methodSignature);
if (!slotChanged)
{
resolution = FunctionPointerOps.GetGenericMethodFunctionPointer(functionPointer, genericDictionary);
}
break;
}
eeType = eeType.BaseType;
}
// If the current slot to examine has changed, restart the lookup.
// This happens when there is an interface call.
if (slotChanged)
{
return(GVMLookupForSlotWorker(type, declaringType, genericArguments, methodNameAndSignature));
}
if (resolution == IntPtr.Zero &&
!lookForDefaultImplementations &&
declaringType.ToEETypePtr().IsInterface)
{
lookForDefaultImplementations = true;
goto again;
}
if (resolution == IntPtr.Zero)
{
var sb = new System.Text.StringBuilder();
sb.AppendLine("Generic virtual method pointer lookup failure.");
sb.AppendLine();
sb.AppendLine("Declaring type: " + declaringType.LastResortToString);
sb.AppendLine("Target type: " + type.LastResortToString);
sb.AppendLine("Method name: " + methodNameAndSignature.Name);
sb.AppendLine("Instantiation:");
for (int i = 0; i < genericArguments.Length; i++)
{
sb.AppendLine(" Argument " + i.LowLevelToString() + ": " + genericArguments[i].LastResortToString);
}
Environment.FailFast(sb.ToString());
}
return(resolution);
}
