Remove ILLink warnings from empty console app

src/coreclr/System.Private.CoreLib/src/System/Attribute.CoreCLR.cs

@@ -1,9 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-using System.Reflection;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
 
 namespace System
 {
@@ -77,6 +78,9 @@ private static bool InternalIsDefined(PropertyInfo element, Type attributeType,
             return false;
         }
 
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2075:UnrecognizedReflectionPattern",
+            Justification = "rtPropAccessor.DeclaringType is guaranteed to have the specified property because " +
+                "rtPropAccessor.GetParentDefinition() returned a non-null MethodInfo.")]
         private static PropertyInfo? GetParentDefinition(PropertyInfo property, Type[] propertyParameters)
         {
             Debug.Assert(property != null);
@@ -142,6 +146,9 @@ private static Attribute[] InternalGetCustomAttributes(EventInfo element, Type t
                 return attributes;
         }
 
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2075:UnrecognizedReflectionPattern",
+            Justification = "rtAdd.DeclaringType is guaranteed to have the specified event because " +
+                "rtAdd.GetParentDefinition() returned a non-null MethodInfo.")]
         private static EventInfo? GetParentDefinition(EventInfo ev)
         {
             Debug.Assert(ev != null);

src/coreclr/System.Private.CoreLib/src/System/Reflection/Associates.cs

@@ -34,8 +34,8 @@ internal static bool IncludeAccessor(MethodInfo? associate, bool nonPublic)
 
         [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
             Justification = "Module.ResolveMethod is marked as RequiresUnreferencedCode because it relies on tokens" +
-                            "which are not guaranteed to be stable across trimming. So if somebody harcodes a token it could break." +
-                            "The usage here is not like that as all these tokes come from existing metadata loaded from some IL" +
+                            "which are not guaranteed to be stable across trimming. So if somebody hardcodes a token it could break." +
+                            "The usage here is not like that as all these tokens come from existing metadata loaded from some IL" +
                             "and so trimming has no effect (the tokens are read AFTER trimming occured).")]
         private static RuntimeMethodInfo? AssignAssociates(
             int tkMethod,

src/coreclr/System.Private.CoreLib/src/System/Reflection/Emit/TypeBuilderInstantiation.cs

@@ -106,7 +106,7 @@ public override Type MakeArrayType(int rank)
         public override string? FullName => m_strFullQualName ??= TypeNameBuilder.ToString(this, TypeNameBuilder.Format.FullName);
         public override string? Namespace => m_type.Namespace;
         public override string? AssemblyQualifiedName => TypeNameBuilder.ToString(this, TypeNameBuilder.Format.AssemblyQualifiedName);
-        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2055:UnrecognizedReflectionPatter",
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2055:UnrecognizedReflectionPattern",
             Justification = "The entire TypeBuilderInstantiation is serving the MakeGenericType implementation. " +
                             "Currently this is not supported by linker. Once it is supported the outercall (Type.MakeGenericType)" +
                             "will validate that the types fullfill the necessary requirements of annotations on type parameters." +

src/coreclr/System.Private.CoreLib/src/System/Reflection/RuntimeExceptionHandlingClause.cs

@@ -41,8 +41,8 @@ public override Type? CatchType
         {
             [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
                 Justification = "Module.ResolveType is marked as RequiresUnreferencedCode because it relies on tokens" +
-                                "which are not guaranteed to be stable across trimming. So if somebody harcodes a token it could break." +
-                                "The usage here is not like that as all these tokes come from existing metadata loaded from some IL" +
+                                "which are not guaranteed to be stable across trimming. So if somebody hardcodes a token it could break." +
+                                "The usage here is not like that as all these tokens come from existing metadata loaded from some IL" +
                                 "and so trimming has no effect (the tokens are read AFTER trimming occured).")]
             get
             {

src/coreclr/System.Private.CoreLib/src/System/RuntimeHandles.cs

@@ -37,6 +37,7 @@ internal RuntimeType GetTypeChecked()
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern bool IsInstanceOfType(RuntimeType type, [NotNullWhen(true)] object? o);
 
+        [RequiresUnreferencedCode("MakeGenericType cannot be statically analyzed. It's not possible to guarantee the availability of requirements of the generic type.")]
         internal static Type GetTypeHelper(Type typeStart, Type[]? genericArgs, IntPtr pModifiers, int cModifiers)
         {
             Type type = typeStart;

src/coreclr/System.Private.CoreLib/src/System/RuntimeType.CoreCLR.cs

@@ -4029,6 +4029,7 @@ private extern object InvokeDispMethod(
         #endregion
 
 #if FEATURE_COMINTEROP
+        [RequiresUnreferencedCode("The member might be removed")]
         private object? ForwardCallToInvokeMember(
             string memberName,
             BindingFlags flags,

src/coreclr/System.Private.CoreLib/src/System/TypeNameParser.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Reflection;
 using System.Runtime.CompilerServices;
@@ -53,6 +54,7 @@ internal sealed class TypeNameParser : IDisposable
         #endregion
 
         #region Static Members
+        [RequiresUnreferencedCode("The type might be removed")]
         internal static Type? GetType(
             string typeName,
             Func<AssemblyName, Assembly?>? assemblyResolver,
@@ -102,6 +104,7 @@ public void Dispose()
         #endregion
 
         #region private Members
+        [RequiresUnreferencedCode("The type might be removed")]
         private unsafe Type? ConstructType(
             Func<AssemblyName, Assembly?>? assemblyResolver,
             Func<Assembly?, string, bool, Type?>? typeResolver,
@@ -216,6 +219,7 @@ public void Dispose()
             return assembly;
         }
 
+        [RequiresUnreferencedCode("The type might be removed")]
         private static Type? ResolveType(Assembly? assembly, string[] names, Func<Assembly?, string, bool, Type?>? typeResolver, bool throwOnError, bool ignoreCase, ref StackCrawlMark stackMark)
         {
             Debug.Assert(names != null && names.Length > 0);

src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.Shared.xml

@@ -31,12 +31,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.Delegate.#ctor(System.Type,System.String)</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2026</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.Reflection.Associates.AssignAssociates(System.Int32,System.RuntimeType,System.RuntimeType)</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2026</argument>
@@ -55,12 +49,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.Reflection.Emit.ModuleBuilder.GetTypeToken(System.String)</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2026</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.Reflection.RuntimeExceptionHandlingClause.get_CatchType</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2026</argument>
@@ -73,12 +61,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.StartupHookProvider.ProcessStartupHooks()</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2026</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.TypeNameParser.ResolveType(System.Reflection.Assembly,System.String[],System.Func{System.Reflection.Assembly,System.String,System.Boolean,System.Type},System.Boolean,System.Boolean,System.Threading.StackCrawlMark@)</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2050</argument>
@@ -121,24 +103,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.Reflection.Emit.TypeBuilder.GetMethod(System.Type,System.Reflection.MethodInfo)</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2055</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.Reflection.Emit.TypeBuilderInstantiation.Substitute(System.Type[])</property>
-    </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2055</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.Reflection.SignatureTypeExtensions.TryMakeGenericType(System.Type,System.Type[])</property>
-    </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2055</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.RuntimeTypeHandle.GetTypeHelper(System.Type,System.Type[],System.IntPtr,System.Int32)</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2057</argument>
@@ -211,12 +175,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.Reflection.RuntimeAssembly.AddPublicNestedTypes(System.Type,System.Collections.Generic.List{System.Type},System.Collections.Generic.List{System.Exception})</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2070</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.RuntimeType.GetMethodBase(System.RuntimeType,System.RuntimeMethodHandleInternal)</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2072</argument>
@@ -247,18 +205,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:Internal.Runtime.InteropServices.ComponentActivator.InternalGetFunctionPointer(System.Runtime.Loader.AssemblyLoadContext,System.String,System.String,System.IntPtr)</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2075</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.Attribute.GetParentDefinition(System.Reflection.EventInfo)</property>
-    </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2075</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.Attribute.GetParentDefinition(System.Reflection.PropertyInfo,System.Type[])</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2075</argument>
@@ -295,12 +241,6 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.StartupHookProvider.CallStartupHook(System.StartupHookProvider.StartupHookNameOrPath)</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2075</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.TypeNameParser.ResolveType(System.Reflection.Assembly,System.String[],System.Func{System.Reflection.Assembly,System.String,System.Boolean,System.Type},System.Boolean,System.Boolean,System.Threading.StackCrawlMark@)</property>
-    </attribute>
     <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
       <argument>ILLink</argument>
       <argument>IL2077</argument>
@@ -337,11 +277,5 @@
       <property name="Scope">member</property>
       <property name="Target">M:System.Reflection.Emit.TypeBuilder.DefinePInvokeMethodHelper(System.String,System.String,System.String,System.Reflection.MethodAttributes,System.Reflection.CallingConventions,System.Type,System.Type[],System.Type[],System.Type[],System.Type[][],System.Type[][],System.Runtime.InteropServices.CallingConvention,System.Runtime.InteropServices.CharSet)</property>
     </attribute>
-    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
-      <argument>ILLink</argument>
-      <argument>IL2085</argument>
-      <property name="Scope">member</property>
-      <property name="Target">M:System.RuntimeType.ForwardCallToInvokeMember(System.String,System.Reflection.BindingFlags,System.Object,System.Object[],System.Boolean[],System.Int32[],System.Type[],System.Type)</property>
-    </attribute>
   </assembly>
 </linker>

src/libraries/System.Private.CoreLib/src/System/AppDomain.cs

@@ -401,7 +401,9 @@ public void SetThreadPrincipal(IPrincipal principal)
 
         // TODO: Remove these DynamicDependencyAttributes when https://github.com/mono/linker/issues/943 is fixed.
         [DynamicDependency("GetDefaultInstance", "System.Security.Principal.GenericPrincipal", "System.Security.Claims")]
+#if TARGET_WINDOWS
         [DynamicDependency("GetDefaultInstance", "System.Security.Principal.WindowsPrincipal", "System.Security.Principal.Windows")]
+#endif
         internal IPrincipal? GetThreadPrincipal()
         {
             IPrincipal? principal = _defaultPrincipal;

src/libraries/System.Runtime/tests/TrimmingTests/InheritedAttributeTests.cs

@@ -0,0 +1,43 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+
+[AttributeUsage(AttributeTargets.Property, Inherited = true)]
+class FooAttribute : Attribute{ }
+[AttributeUsage(AttributeTargets.Property, Inherited = true)]
+class BarAttribute : Attribute { }
+[AttributeUsage(AttributeTargets.Property, Inherited = true)]
+class BazAttribute : Attribute { }
+
+class Base
+{
+    [Foo]
+    public virtual int X { get; }
+}
+
+class Mid : Base
+{
+    [Bar]
+    public override int X => base.X;
+}
+
+class Derived : Mid
+{
+    [Baz]
+    public override int X => base.X;
+}
+
+class Program
+{
+    static int Main(string[] args)
+    {
+        int numAttributes = Attribute.GetCustomAttributes(typeof(Derived).GetProperty("X"), inherit: true).Length;
+        if (numAttributes == 3)
+        {
+            return 100;
+        }
+
+        return -1;
+    }
+}

src/libraries/System.Runtime/tests/TrimmingTests/System.Runtime.TrimmingTests.proj

@@ -9,6 +9,7 @@
     <TestConsoleAppSourceFiles Include="DebuggerTypeProxyAttributeTests.cs" />
     <TestConsoleAppSourceFiles Include="DefaultValueAttributeCtorTest.cs" />
     <TestConsoleAppSourceFiles Include="GenericArraySortHelperTest.cs" />
+    <TestConsoleAppSourceFiles Include="InheritedAttributeTests.cs" />
     <TestConsoleAppSourceFiles Include="InterfacesOnArrays.cs" />
     <TestConsoleAppSourceFiles Include="StackFrameHelperTest.cs">
       <!-- There is a bug with the linker where it is corrupting the pdbs while trimming

src/libraries/illink-sharedframework.targets

@@ -71,7 +71,6 @@
 
       <!-- Collate CoreLib suppression XML files not bin-placed in earlier per-library linker run. CoreLib doesn't use bin-place logic. -->
       <_SuppressionsXmls Include="$(CoreLibSharedILLinkSuppressionsFilesPrefix).xml" />
-      <_SuppressionsXmls Condition="'$(TargetOS)' != 'windows'" Include="$(CoreLibSharedILLinkSuppressionsFilesPrefix).NonWindows.xml" />
 
       <!-- netstandard2.1-only System.ComponentModel.Annotations XML file is not bin-placed during -allConfigurations builds
            due to the linker not being run on the assembly (eng\illink.targets). Manually include it. -->