[main] Update dependencies from mono/linker

eng/Version.Details.xml

@@ -194,9 +194,9 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>acbbb505492244b4c07a4a368257ba86a1fc02e1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="6.0.100-preview.2.21126.1">
+    <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="6.0.100-preview.2.21162.2">
       <Uri>https://github.com/mono/linker</Uri>
-      <Sha>0c4902a114192fce1e7570d998e70d24669e9cc3</Sha>
+      <Sha>c44302b73f744c24293c3092a011655f1a4fffe0</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="1.0.0-prerelease.21154.2">
       <Uri>https://github.com/dotnet/xharness</Uri>

eng/Versions.props

@@ -155,7 +155,7 @@
     <!-- Docs -->
     <MicrosoftPrivateIntellisenseVersion>5.0.0-preview-20201009.2</MicrosoftPrivateIntellisenseVersion>
     <!-- ILLink -->
-    <MicrosoftNETILLinkTasksVersion>6.0.100-preview.2.21126.1</MicrosoftNETILLinkTasksVersion>
+    <MicrosoftNETILLinkTasksVersion>6.0.100-preview.2.21162.2</MicrosoftNETILLinkTasksVersion>
     <!-- ICU -->
     <MicrosoftNETCoreRuntimeICUTransportVersion>6.0.0-preview.3.21151.1</MicrosoftNETCoreRuntimeICUTransportVersion>
     <!-- Mono LLVM -->

src/libraries/System.Text.Json/src/System.Text.Json.csproj

@@ -227,6 +227,7 @@
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\DynamicDependencyAttribute.cs" />
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\DynamicallyAccessedMembersAttribute.cs" />
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\DynamicallyAccessedMemberTypes.cs" />
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
     <Compile Include="$(CommonPath)System\Collections\Generic\ReferenceEqualityComparer.cs" Link="Common\System\Collections\Generic\ReferenceEqualityComparer.cs" />
   </ItemGroup>
   <ItemGroup Condition="$(TargetFramework.StartsWith('netstandard')) or $(TargetFramework.StartsWith('net4'))">
@@ -254,6 +255,9 @@
     <Reference Include="System.Threading.Tasks" />
     <Reference Include="System.Threading.Tasks.Extensions" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
+    <Reference Include="System.Diagnostics.Tools" />
+  </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' or $(TargetFramework.StartsWith('net4'))">
     <PackageReference Include="System.Buffers" Version="$(SystemBuffersVersion)" />
     <PackageReference Include="System.Memory" Version="$(SystemMemoryVersion)" />

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Value/EnumConverterFactory.cs

@@ -1,7 +1,7 @@
 // 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.Diagnostics.CodeAnalysis;
 
 namespace System.Text.Json.Serialization.Converters
 {
@@ -16,16 +16,27 @@ public override bool CanConvert(Type type)
             return type.IsEnum;
         }
 
-        public override JsonConverter CreateConverter(Type type, JsonSerializerOptions options)
+        public override JsonConverter CreateConverter(Type type, JsonSerializerOptions options) =>
+            Create(type, EnumConverterOptions.AllowNumbers, options);
+
+        internal static JsonConverter Create(Type enumType, EnumConverterOptions converterOptions, JsonSerializerOptions serializerOptions)
         {
-            JsonConverter converter = (JsonConverter)Activator.CreateInstance(
-                typeof(EnumConverter<>).MakeGenericType(type),
-                BindingFlags.Instance | BindingFlags.Public,
-                binder: null,
-                new object[] { EnumConverterOptions.AllowNumbers, options },
-                culture: null)!;
+            return (JsonConverter)Activator.CreateInstance(
+                GetEnumConverterType(enumType),
+                new object[] { converterOptions, serializerOptions })!;
+        }
 
-            return converter;
+        internal static JsonConverter Create(Type enumType, EnumConverterOptions converterOptions, JsonNamingPolicy? namingPolicy, JsonSerializerOptions serializerOptions)
+        {
+            return (JsonConverter)Activator.CreateInstance(
+                GetEnumConverterType(enumType),
+                new object?[] { converterOptions, namingPolicy, serializerOptions })!;
         }
+
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2055:MakeGenericType",
+            Justification = "'where T : struct' implies 'T : new()', so the trimmer is warning calling MakeGenericType here because enumType's constructors are not annotated. " +
+            "But EnumConverter doesn't call new T(), so this is safe.")]
+        [return: DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
+        private static Type GetEnumConverterType(Type enumType) => typeof(EnumConverter<>).MakeGenericType(enumType);
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Value/NullableConverterFactory.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.Reflection;
 
 namespace System.Text.Json.Serialization.Converters
@@ -34,11 +35,17 @@ public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializer
         public static JsonConverter CreateValueConverter(Type valueTypeToConvert, JsonConverter valueConverter)
         {
             return (JsonConverter)Activator.CreateInstance(
-                typeof(NullableConverter<>).MakeGenericType(valueTypeToConvert),
+                GetNullableConverterType(valueTypeToConvert),
                 BindingFlags.Instance | BindingFlags.Public,
                 binder: null,
                 args: new object[] { valueConverter },
                 culture: null)!;
         }
+
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2055:MakeGenericType",
+            Justification = "'where T : struct' implies 'T : new()', so the trimmer is warning calling MakeGenericType here because valueTypeToConvert's constructors are not annotated. " +
+            "But NullableConverter doesn't call new T(), so this is safe.")]
+        [return: DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
+        private static Type GetNullableConverterType(Type valueTypeToConvert) => typeof(NullableConverter<>).MakeGenericType(valueTypeToConvert);
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonSerializerOptions.Converters.cs

@@ -96,12 +96,7 @@ internal JsonConverter GetDictionaryKeyConverter(Type keyType)
             // Use factory pattern to generate an EnumConverter with AllowStrings and AllowNumbers options for dictionary keys.
             // There will be one converter created for each enum type.
             JsonConverter GetEnumConverter()
-                => (JsonConverter)Activator.CreateInstance(
-                        typeof(EnumConverter<>).MakeGenericType(keyType),
-                        BindingFlags.Instance | BindingFlags.Public,
-                        binder: null,
-                        new object[] { EnumConverterOptions.AllowStrings | EnumConverterOptions.AllowNumbers, this },
-                        culture: null)!;
+                => EnumConverterFactory.Create(keyType, EnumConverterOptions.AllowStrings | EnumConverterOptions.AllowNumbers, this);
         }
 
         private ConcurrentDictionary<Type, JsonConverter>? _dictionaryKeyConverters;

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonStringEnumConverter.cs

@@ -1,7 +1,6 @@
 // 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.Text.Json.Serialization.Converters;
 
 namespace System.Text.Json.Serialization
@@ -52,16 +51,7 @@ public override bool CanConvert(Type typeToConvert)
         }
 
         /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
-        {
-            JsonConverter converter = (JsonConverter)Activator.CreateInstance(
-                typeof(EnumConverter<>).MakeGenericType(typeToConvert),
-                BindingFlags.Instance | BindingFlags.Public,
-                binder: null,
-                new object?[] { _converterOptions, _namingPolicy, options },
-                culture: null)!;
-
-            return converter;
-        }
+        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options) =>
+            EnumConverterFactory.Create(typeToConvert, _converterOptions, _namingPolicy, options);
     }
 }