RuntimeMethod ITypeSystem.GetImplementationForInternalCall(RuntimeMethod internalCall)
{
Debug.Assert(internalCall != null, @"internalCall is null.");
if (null == internalCall)
{
throw new ArgumentNullException(@"internalCall");
}
// Return value
RuntimeMethod result = null;
// Shortcut: If the call was resolved previously, scan it there
if (this.internalCallTargets.TryGetValue(internalCall, out result))
{
return(result);
}
/*
* FIXME:
* - The following sequence requires that mscorlib is available in the test runtime.
* - Maybe we should be smarter about its use though.
* - Commented out right now, as we don't load assembly dependencies yet.
*/
ITypeSystem ts = (ITypeSystem)this;
// FIXME: Include this when we're loading mscorlib
//RuntimeType rtMia = ts.GetType(@"System.Runtime.CompilerServices.MethodImplAttribute");
//MethodImplAttribute mia = (MethodImplAttribute)internalCall.GetAttributes(rtMia, true);
//Debug.Assert(MethodImplOptions.InternalCall == (mia.Value & MethodImplOptions.InternalCall), @"Method is not InternalCall.");
//if (MethodImplOptions.InternalCall != (mia.Value & MethodImplOptions.InternalCall))
// throw new ArgumentException(@"Method not marked as an InternalCall.", @"internalCall");
RuntimeType callImplType = ts.GetType("Mosa.Runtime.Vm.InternalCallImplAttribute");
object[] callDefAttrs = internalCall.GetCustomAttributes(callImplType);
Debug.Assert(0 != callDefAttrs.Length, @"No runtime call definition for icall!");
Debug.Assert(1 == callDefAttrs.Length, @"Only one call definition for icall supported! Additional ones ignored!");
InternalCallImplAttribute callDef = (InternalCallImplAttribute)callDefAttrs[0];
// Scan all known types for icalls
foreach (RuntimeType rType in internalTypes)
{
foreach (RuntimeMethod rMethod in rType.Methods)
{
object[] callImpls = rMethod.GetCustomAttributes(callImplType);
foreach (InternalCallImplAttribute callImpl in callImpls)
{
if (callDef.Match(callImpl) == true)
{
// We found the sought icall, save it and return it
this.internalCallTargets[internalCall] = rMethod;
return(rMethod);
}
}
}
}
throw new NotImplementedException(@"Requested InternalCall not loaded or not implemented.");
}
/// <summary>
/// When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.
/// </summary>
/// <param name="obj">An <see cref="T:System.Object"/> to compare with this instance of <see cref="T:System.Attribute"/>.</param>
/// <returns>
/// true if this instance equals <paramref name="obj"/>; otherwise, false.
/// </returns>
public override bool Match(object obj)
{
InternalCallImplAttribute icia = obj as InternalCallImplAttribute;
if (icia != null)
{
return(Match(icia));
}
return(false);
}
/// <summary> /// Checks if this attribute matches the specified attribute. /// </summary> /// <param name="call">The call attribute.</param> /// <returns><c>true</c> if they match; otherwise <c>false</c>.</returns> public abstract bool Match(InternalCallImplAttribute call);
/// <summary> /// Checks if this attribute matches the specified attribute. /// </summary> /// <param name="call">The call attribute.</param> /// <returns><c>true</c> if they match; otherwise <c>false</c>.</returns> public abstract bool Match(InternalCallImplAttribute call);
/// <summary>
/// Checks if this attribute matches the specified attribute.
/// </summary>
/// <param name="call">The call attribute.</param>
/// <returns>
/// <c>true</c> if they match; otherwise <c>false</c>.
/// </returns>
public sealed override bool Match(InternalCallImplAttribute call)
{
VmCallAttribute vmCall = call as VmCallAttribute;
return(vmCall != null && vmCall.RuntimeCall == this.RuntimeCall);
}
/// <summary>
/// Checks if this attribute matches the specified attribute.
/// </summary>
/// <param name="call">The call attribute.</param>
/// <returns>
/// <c>true</c> if they match; otherwise <c>false</c>.
/// </returns>
public override sealed bool Match(InternalCallImplAttribute call)
{
VmCallAttribute vmCall = call as VmCallAttribute;
return (vmCall != null && vmCall.RuntimeCall == this.RuntimeCall);
}