/// <summary>
/// Check if MethodImpl requires slot unification.
/// </summary>
/// <param name="method">Method to check</param>
/// <returns>True when the method is marked with the PreserveBaseOverrides custom attribute, false otherwise.</returns>
public static bool RequiresSlotUnification(this MethodDesc method)
{
if (method.HasCustomAttribute("System.Runtime.CompilerServices", "PreserveBaseOverridesAttribute"))
{
#if DEBUG
// We shouldn't be calling this for non-MethodImpls, so verify that the method being checked is really a MethodImpl
MetadataType mdType = method.OwningType as MetadataType;
if (mdType != null)
{
bool isMethodImpl = false;
foreach (MethodImplRecord methodImplRecord in mdType.VirtualMethodImplsForType)
{
if (method == methodImplRecord.Body)
{
isMethodImpl = true;
break;
}
}
Debug.Assert(isMethodImpl);
}
#endif
return(true);
}
return(false);
}
/// <summary>
/// Gets a value indicating whether the method has the SuppressGCTransition attribute
/// </summary>
public static bool HasSuppressGCTransitionAttribute(this MethodDesc method)
{
Debug.Assert(method.IsPInvoke);
if (method is Internal.IL.Stubs.PInvokeTargetNativeMethod rawPinvoke)
{
method = rawPinvoke.Target;
}
// Check SuppressGCTransition attribute
return(method.HasCustomAttribute("System.Runtime.InteropServices", "SuppressGCTransitionAttribute"));
}
protected override IMethodNode CreateMethodEntrypointNode(MethodDesc method)
{
if (method.HasCustomAttribute("System.Runtime", "RuntimeImportAttribute"))
{
return new RuntimeImportMethodNode(method);
}
if (CompilationModuleGroup.ContainsMethod(method))
{
return new MethodCodeNode(method);
}
else
{
return new ExternMethodSymbolNode(method);
}
}
protected override IMethodNode CreateMethodEntrypointNode(MethodDesc method)
{
if (method.IsInternalCall)
{
// The only way to locate the entrypoint for an internal call is through the RuntimeImportAttribute.
// If this is a method that doesn't have it (e.g. a string constructor), the method should never
// have reached this code path.
Debug.Assert(method.HasCustomAttribute("System.Runtime", "RuntimeImportAttribute"));
return new RuntimeImportMethodNode(method);
}
if (CompilationModuleGroup.ContainsMethod(method))
{
return new MethodCodeNode(method);
}
else
{
return new ExternMethodSymbolNode(method);
}
}
public static UnmanagedCallingConventions GetPInvokeMethodCallingConventions(this MethodDesc method)
{
Debug.Assert(method.IsPInvoke);
UnmanagedCallingConventions result;
if (method is Internal.IL.Stubs.PInvokeTargetNativeMethod pinvokeTarget)
{
method = pinvokeTarget.Target;
}
MethodSignatureFlags unmanagedCallConv = method.GetPInvokeMethodMetadata().Flags.UnmanagedCallingConvention;
if (unmanagedCallConv != MethodSignatureFlags.None)
{
Debug.Assert((int)MethodSignatureFlags.UnmanagedCallingConventionCdecl == (int)UnmanagedCallingConventions.Cdecl &&
(int)MethodSignatureFlags.UnmanagedCallingConventionStdCall == (int)UnmanagedCallingConventions.Stdcall &&
(int)MethodSignatureFlags.UnmanagedCallingConventionThisCall == (int)UnmanagedCallingConventions.Thiscall);
result = (UnmanagedCallingConventions)unmanagedCallConv;
}
else
{
CustomAttributeValue <TypeDesc>?unmanagedCallConvAttribute = ((EcmaMethod)method).GetDecodedCustomAttribute("System.Runtime.InteropServices", "UnmanagedCallConvAttribute");
if (unmanagedCallConvAttribute != null)
{
result = GetUnmanagedCallingConventionFromAttribute(unmanagedCallConvAttribute.Value, method.Context);
}
else
{
result = GetPlatformDefaultUnmanagedCallingConvention(method.Context);
}
}
if (method.HasCustomAttribute("System.Runtime.InteropServices", "SuppressGCTransitionAttribute"))
{
result |= UnmanagedCallingConventions.IsSuppressGcTransition;
}
return(result);
}
protected override IMethodNode CreateMethodEntrypointNode(MethodDesc method)
{
if (method.IsInternalCall)
{
// The only way to locate the entrypoint for an internal call is through the RuntimeImportAttribute.
if (method.HasCustomAttribute("System.Runtime", "RuntimeImportAttribute"))
{
return new RuntimeImportMethodNode(method);
}
// On CLR this would throw a SecurityException with "ECall methods must be packaged into a system module."
// This is a corner case that nobody is likely to care about.
throw new TypeSystemException.InvalidProgramException(ExceptionStringID.InvalidProgramSpecific, method);
}
if (CompilationModuleGroup.ContainsMethod(method))
{
return new MethodCodeNode(method);
}
else
{
return new ExternMethodSymbolNode(method);
}
}
public override bool HasCustomAttribute(string attributeNamespace, string attributeName)
{
return(_typicalMethodDef.HasCustomAttribute(attributeNamespace, attributeName));
}