Enable single file analyzer in the runtime

eng/Analyzers.props

@@ -3,11 +3,13 @@
     <CodeAnalysisRuleset>$(MSBuildThisFileDirectory)CodeAnalysis.ruleset</CodeAnalysisRuleset>
     <!-- Disable analyzers in sourcebuild -->
     <RunAnalyzers Condition="'$(DotNetBuildFromSource)' == 'true'">false</RunAnalyzers>
+    <EnableSingleFileAnalyzer>true</EnableSingleFileAnalyzer>
   </PropertyGroup>
   <ItemGroup Condition="'$(RunAnalyzers)' != 'false'">
     <PackageReference Include="Microsoft.DotNet.CodeAnalysis" Version="$(MicrosoftDotNetCodeAnalysisVersion)" PrivateAssets="all" IsImplicitlyDefined="true" />
     <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="$(MicrosoftCodeAnalysisNetAnalyzersVersion)" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.CodeStyle" Version="$(MicrosoftCodeAnalysisCSharpCodeStyleVersion)" PrivateAssets="all" />
     <PackageReference Include="StyleCop.Analyzers" Version="$(StyleCopAnalyzersVersion)" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.NET.ILLink.Analyzers" Version="$(MicrosoftNETILLinkAnalyzerPackageVersion)" PrivateAssets="all" />
   </ItemGroup>
 </Project>

eng/CodeAnalysis.ruleset

@@ -254,8 +254,6 @@
     <Rule Id="CA5401" Action="None" />          <!-- Do not use CreateEncryptor with non-default IV -->
     <Rule Id="CA5402" Action="None" />          <!-- Use CreateEncryptor with the default IV  -->
     <Rule Id="CA5403" Action="None" />          <!-- Do not hard-code certificate -->
-    <Rule Id="IL3000" Action="None" />          <!-- Avoid using accessing Assembly file path when publishing as a single-file -->
-    <Rule Id="IL3001" Action="None" />          <!-- Avoid using accessing Assembly file path when publishing as a single-file -->
   </Rules>
   <Rules AnalyzerId="StyleCop.Analyzers" RuleNamespace="StyleCop.Analyzers">
     <Rule Id="AD0001" Action="None" />          <!-- Analyzer threw an exception -->

eng/CodeAnalysis.test.ruleset

@@ -255,6 +255,7 @@
     <Rule Id="CA5403" Action="None" />          <!-- Do not hard-code certificate -->
     <Rule Id="IL3000" Action="None" />          <!-- Avoid using accessing Assembly file path when publishing as a single-file -->
     <Rule Id="IL3001" Action="None" />          <!-- Avoid using accessing Assembly file path when publishing as a single-file -->
+    <Rule Id="IL3002" Action="None" />          <!-- Using member with RequiresAssemblyFilesAttribute can break functionality when embedded in a single-file app -->
   </Rules>
   <Rules AnalyzerId="StyleCop.Analyzers" RuleNamespace="StyleCop.Analyzers">
     <Rule Id="AD0001" Action="None" />          <!-- Analyzer threw an exception -->

eng/Versions.props

@@ -166,6 +166,7 @@
     <MicrosoftPrivateIntellisenseVersion>5.0.0-preview-20201009.2</MicrosoftPrivateIntellisenseVersion>
     <!-- ILLink -->
     <MicrosoftNETILLinkTasksVersion>6.0.100-preview.2.21226.1</MicrosoftNETILLinkTasksVersion>
+    <MicrosoftNETILLinkAnalyzerPackageVersion>$(MicrosoftNETILLinkTasksVersion)</MicrosoftNETILLinkAnalyzerPackageVersion>
     <!-- ICU -->
     <MicrosoftNETCoreRuntimeICUTransportVersion>6.0.0-preview.5.21219.2</MicrosoftNETCoreRuntimeICUTransportVersion>
     <!-- Mono LLVM -->

src/libraries/Microsoft.Extensions.DependencyModel/src/DependencyContext.cs

@@ -3,14 +3,17 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Reflection;
 
 namespace Microsoft.Extensions.DependencyModel
 {
     public class DependencyContext
     {
-        private static readonly Lazy<DependencyContext> _defaultContext = new Lazy<DependencyContext>(LoadDefault);
+        private static bool _isDefaultContextInitialized;
+
+        private static DependencyContext _defaultContext;
 
         public DependencyContext(TargetInfo target,
             CompilationOptions compilationOptions,
@@ -46,7 +49,19 @@ public DependencyContext(TargetInfo target,
             RuntimeGraph = runtimeGraph.ToArray();
         }
 
-        public static DependencyContext Default => _defaultContext.Value;
+        [RequiresAssemblyFiles(Message = "DependencyContext for an assembly from a application published as single-file is not supported. The method will return null. Make sure the calling code can handle this case.")]
+        public static DependencyContext Default
+        {
+            get
+            {
+                if (_isDefaultContextInitialized == false) {
+                    _defaultContext = LoadDefault();
+                    _isDefaultContextInitialized = true;
+                }
+                return _defaultContext;
+            }
+        }
+
 
         public TargetInfo Target { get; }
 
@@ -74,6 +89,7 @@ public DependencyContext Merge(DependencyContext other)
                 );
         }
 
+        [RequiresAssemblyFiles(Message = "DependencyContext for an assembly from a application published as single-file is not supported. The method will return null. Make sure the calling code can handle this case.")]
         private static DependencyContext LoadDefault()
         {
             var entryAssembly = Assembly.GetEntryAssembly();
@@ -85,6 +101,7 @@ private static DependencyContext LoadDefault()
             return Load(entryAssembly);
         }
 
+        [RequiresAssemblyFiles(Message = "DependencyContext for an assembly from a application published as single-file is not supported. The method will return null. Make sure the calling code can handle this case.")]
         public static DependencyContext Load(Assembly assembly)
         {
             return DependencyContextLoader.Default.Load(assembly);

src/libraries/Microsoft.Extensions.DependencyModel/src/DependencyContextLoader.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Reflection;
 
@@ -50,6 +51,7 @@ private static Stream GetResourceStream(Assembly assembly, string name)
             return assembly.GetManifestResourceStream(name);
         }
 
+        [RequiresAssemblyFiles(Message = "DependencyContext for an assembly from a application published as single-file is not supported. The method will return null. Make sure the calling code can handle this case.")]
         public DependencyContext Load(Assembly assembly)
         {
             if (assembly == null)
@@ -103,6 +105,7 @@ private DependencyContext LoadContext(IDependencyContextReader reader, string lo
             return null;
         }
 
+        [RequiresAssemblyFiles(Message = "DependencyContext for an assembly from a application published as single-file is not supported. The method will return null. Make sure the calling code can handle this case.")]
         private DependencyContext LoadAssemblyContext(Assembly assembly, IDependencyContextReader reader)
         {
             using (Stream stream = GetResourceStream(assembly, assembly.GetName().Name + DepsJsonExtension))
@@ -125,6 +128,7 @@ private DependencyContext LoadAssemblyContext(Assembly assembly, IDependencyCont
             return null;
         }
 
+        [RequiresAssemblyFiles(Message = "The use of DependencyContextLoader is not supported when publishing as single-file")]
         private string GetDepsJsonPath(Assembly assembly)
         {
             // Assemblies loaded in memory (e.g. single file) return empty string from Location.

src/libraries/Microsoft.Extensions.DependencyModel/src/Microsoft.Extensions.DependencyModel.csproj

@@ -25,4 +25,9 @@
     <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Encodings.Web\src\System.Text.Encodings.Web.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\src\System.Text.Json.csproj" />
   </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\RequiresAssemblyFilesAttribute.cs" />
+  </ItemGroup>
+
 </Project>

src/libraries/Microsoft.NETCore.Platforms/src/AssemblyResolver.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Reflection;
 
@@ -27,6 +28,8 @@ public static void Enable()
             // has run.
         }
 
+        [UnconditionalSuppressMessage("Single file", "IL3000:Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "The code has a fallback to use AppDomain.CurrentDomain.BaseDirectory so it will work correctly in single-file")]
         private static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
         {
             // apply any existing policy

src/libraries/Microsoft.NETCore.Platforms/src/Microsoft.NETCore.Platforms.csproj

@@ -20,6 +20,7 @@
   <ItemGroup Condition="'$(TargetFramework)' == 'net472'">
     <Compile Include="BuildTask.Desktop.cs" />
     <Compile Include="AssemblyResolver.cs" />
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
   </ItemGroup>
 
   <ItemGroup>
@@ -37,7 +38,7 @@
     <Content Condition="'$(AdditionalRuntimeIdentifiers)' != ''" Include="$(IntermediateOutputPath)runtime.json" PackagePath="/" />
     <Content Include="_._" PackagePath="lib/netstandard1.0" />
   </ItemGroup>
-  
+
   <ItemGroup>
     <PackageReference Include="Microsoft.Build" Version="$(RefOnlyMicrosoftBuildVersion)" />
     <PackageReference Include="Microsoft.Build.Tasks.Core" Version="$(RefOnlyMicrosoftBuildTasksCoreVersion)" />
@@ -54,4 +55,4 @@
   </Target>
 
   <Import Project="runtimeGroups.props" />
-</Project>
+</Project>

src/libraries/Microsoft.XmlSerializer.Generator/src/Microsoft.XmlSerializer.Generator.csproj

@@ -7,8 +7,15 @@
     <OutputType>Exe</OutputType>
     <TargetFrameworks>netstandard2.0</TargetFrameworks>
   </PropertyGroup>
+
   <ItemGroup>
     <Compile Include="Sgen.cs" />
   </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
+  </ItemGroup>
+
   <Import Project=".\GenerateThisAssemblyCs.targets" />
+
 </Project>

src/libraries/Microsoft.XmlSerializer.Generator/src/Sgen.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.IO;
 using System.Linq;
@@ -206,6 +207,8 @@ private int Run(string[] args)
             return 0;
         }
 
+        [UnconditionalSuppressMessage("Single file", "IL3000: Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "Code has a fallback and thus works in single-file")]
         private void GenerateFile(List<string> typeNames, string assemblyName, bool proxyOnly, bool silent, bool warnings, bool force, string outputDirectory, bool parsableerrors)
         {
             Assembly assembly = LoadAssembly(assemblyName, true);
@@ -293,6 +296,9 @@ private void GenerateFile(List<string> typeNames, string assemblyName, bool prox
                     ImportType(type, mappings, importedTypes, warnings, importer, parsableerrors);
                 }
             }
+            string nameOrLocation = assembly.Location;
+            if (nameOrLocation == string.Empty)
+                nameOrLocation = assembly.FullName;
 
             if (importedTypes.Count > 0)
             {
@@ -369,17 +375,17 @@ private void GenerateFile(List<string> typeNames, string assemblyName, bool prox
                     if (!silent)
                     {
                         Console.Out.WriteLine(SR.Format(SR.InfoFileName, codePath));
-                        Console.Out.WriteLine(SR.Format(SR.InfoGeneratedFile, assembly.Location, codePath));
+                        Console.Out.WriteLine(SR.Format(SR.InfoGeneratedFile, nameOrLocation, codePath));
                     }
                 }
                 else
                 {
-                    Console.Out.WriteLine(FormatMessage(parsableerrors, false, SR.Format(SR.ErrGenerationFailed, assembly.Location)));
+                    Console.Out.WriteLine(FormatMessage(parsableerrors, false, SR.Format(SR.ErrGenerationFailed, nameOrLocation)));
                 }
             }
             else
             {
-                Console.Out.WriteLine(FormatMessage(parsableerrors, true, SR.Format(SR.InfoNoSerializableTypes, assembly.Location)));
+                Console.Out.WriteLine(FormatMessage(parsableerrors, true, SR.Format(SR.InfoNoSerializableTypes, nameOrLocation)));
             }
         }
 

src/libraries/System.ComponentModel.Composition/src/System.ComponentModel.Composition.csproj

@@ -181,6 +181,9 @@
     <Compile Include="$(CommonPath)System\Composition\Diagnostics\TraceWriter.cs"
              Link="Common\System\Composition\Diagnostics\TraceWriter.cs" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)'">
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
+  </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' != 'netstandard2.0'">
     <Reference Include="Microsoft.Win32.Primitives" />
     <Reference Include="System.Collections" />

src/libraries/System.ComponentModel.Composition/src/System/ComponentModel/Composition/Hosting/AssemblyCatalog.cs

@@ -543,6 +543,8 @@ private void ThrowIfDisposed()
         private string GetDisplayName() =>
             $"{GetType().Name} (Assembly=\"{Assembly.FullName}\")";   // NOLOC
 
+        [UnconditionalSuppressMessage("Single file", "IL3000: Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "Setting a CodeBase is single file compatible")]
         private static Assembly LoadAssembly(string codeBase)
         {
             Requires.NotNullOrEmpty(codeBase, nameof(codeBase));

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/Design/DesigntimeLicenseContext.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.Collections;
@@ -57,6 +58,8 @@ private string GetLocalPath(string fileName)
             return uri.LocalPath + uri.Fragment;
         }
 
+        [UnconditionalSuppressMessage("Single file", "IL3000: Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "Suppressing the warning until gets fixed, see https://github.com/dotnet/runtime/issues/50821")]
         public override string GetSavedLicenseKey(Type type, Assembly resourceAssembly)
         {
             if (_savedLicenseKeys == null || _savedLicenseKeys[type.AssemblyQualifiedName] == null)

src/libraries/System.Configuration.ConfigurationManager/src/System.Configuration.ConfigurationManager.csproj

@@ -258,4 +258,7 @@
   <ItemGroup Condition="'$(IsPartialFacadeAssembly)' == 'true'">
     <Reference Include="System.Configuration" />
   </ItemGroup>
+  <ItemGroup>
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
+  </ItemGroup>
 </Project>

src/libraries/System.Configuration.ConfigurationManager/src/System/Configuration/ClientConfigPaths.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.Globalization;
 using System.IO;
 using System.Reflection;
@@ -28,6 +29,8 @@ internal sealed class ClientConfigPaths
         private readonly bool _includesUserConfig;
         private string _companyName;
 
+        [UnconditionalSuppressMessage("Single file", "IL3000: Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "Code handles single file case")]
         private ClientConfigPaths(string exePath, bool includeUserConfig)
         {
             _includesUserConfig = includeUserConfig;

src/libraries/System.Diagnostics.EventLog/src/System.Diagnostics.EventLog.csproj

@@ -128,6 +128,9 @@
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Win32.Registry\src\Microsoft.Win32.Registry.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)System.Threading.AccessControl\src\System.Threading.AccessControl.csproj" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' != '$(NetCoreAppCurrent)-windows'">
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
+  </ItemGroup>
 
   <!-- Ensure we run ResolveProjectReferences to add the message DLL to the package.
        We do this here rather than in the pkgproj to ensure the package paths are in sync -->

src/libraries/System.Diagnostics.EventLog/src/System/Diagnostics/EventLog.cs

@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.IO;
 using System.Runtime.CompilerServices;
@@ -691,6 +692,8 @@ internal static RegistryKey GetEventLogRegKey(string machine, bool writable)
             return null;
         }
 
+        [UnconditionalSuppressMessage("Single file", "IL3000: Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "The code handles if the path is null by calling AppContext.BaseDirectory")]
         internal static string GetDllPath(string machineName)
         {
             string dllPath = Path.Combine(NetFrameworkUtils.GetLatestBuildDllDirectory(machineName), DllName);

src/libraries/System.Private.CoreLib/src/System/AppContext.AnyOS.cs

@@ -1,13 +1,16 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Reflection;
 
 namespace System
 {
     public static partial class AppContext
     {
+        [UnconditionalSuppressMessage("Single file", "IL3000: Avoid accessing Assembly file path when publishing as a single file",
+            Justification = "Single File apps should always set APP_CONTEXT_BASE_DIRECTORY therefore code handles Assembly.Location equals null")]
         private static string GetBaseDirectoryCore()
         {
             // Fallback path for hosts that do not set APP_CONTEXT_BASE_DIRECTORY explicitly

src/libraries/System.Private.CoreLib/src/System/Diagnostics/CodeAnalysis/RequiresAssemblyFilesAttribute.cs

@@ -12,7 +12,12 @@ namespace System.Diagnostics.CodeAnalysis
                     AttributeTargets.Property,
                     Inherited = false,
                     AllowMultiple = false)]
-    public sealed class RequiresAssemblyFilesAttribute : Attribute
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+    sealed class RequiresAssemblyFilesAttribute : Attribute
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="RequiresAssemblyFilesAttribute"/> class.
@@ -32,4 +37,4 @@ public RequiresAssemblyFilesAttribute() { }
         /// </summary>
         public string? Url { get; set; }
     }
-}
+}