Upgrade ilasm.exe version. This allows us to write tests for the new function pointer calling conventions.

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -22,7 +22,6 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
-using System.Reflection.Metadata;
 using System.Reflection.PortableExecutable;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -41,7 +40,6 @@ using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.Emit;
 using Microsoft.CodeAnalysis.Text;
 using Microsoft.CSharp;
-using Microsoft.DiaSymReader.Tools;
 
 using NUnit.Framework;
 
@@ -70,18 +68,31 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 		UseDebug = 0x1,
 		Force32Bit = 0x2,
 		Library = 0x4,
+		/// Testing our own disassembler, or working around a bug in ildasm.
 		UseOwnDisassembler = 0x8,
+		/// Work around bug in .NET 5 ilasm (https://github.com/dotnet/runtime/issues/32400)
+		UseLegacyAssembler = 0x10,
 	}
 
 	public static partial class Tester
 	{
 		public static readonly string TestCasePath = Path.Combine(
-	Path.GetDirectoryName(typeof(Tester).Assembly.Location),
-	"../../../TestCases");
+			Path.GetDirectoryName(typeof(Tester).Assembly.Location),
+			"../../../TestCases");
 
 		public static string AssembleIL(string sourceFileName, AssemblerOptions options = AssemblerOptions.UseDebug)
 		{
-			string ilasmPath = Path.Combine(Environment.GetEnvironmentVariable("windir"), @"Microsoft.NET\Framework\v4.0.30319\ilasm.exe");
+			string ilasmPath;
+			if (options.HasFlag(AssemblerOptions.UseLegacyAssembler))
+			{
+				ilasmPath = Path.Combine(Environment.GetEnvironmentVariable("windir"), @"Microsoft.NET\Framework\v4.0.30319\ilasm.exe");
+			}
+			else
+			{
+				ilasmPath = Path.Combine(
+					Path.GetDirectoryName(typeof(Tester).Assembly.Location),
+					"ilasm.exe");
+			}
 			string outputFile = Path.Combine(Path.GetDirectoryName(sourceFileName), Path.GetFileNameWithoutExtension(sourceFileName));
 			string otherOptions = " ";
 			if (options.HasFlag(AssemblerOptions.Force32Bit))

ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj

@@ -53,6 +53,7 @@
     <PackageReference Include="NUnit" Version="$(NUnitVersion)" />
     <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
+    <PackageReference Include="Microsoft.NETCore.ILAsm" Version="$(ILAsmVersion)" />
   </ItemGroup>
 
   <ItemGroup>
@@ -305,4 +306,4 @@
     <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
   </ItemGroup>
 
-</Project>
+</Project>

ICSharpCode.Decompiler.Tests/ILPrettyTestRunner.cs

@@ -203,7 +203,7 @@ namespace ICSharpCode.Decompiler.Tests
 		[Test]
 		public void Unsafe()
 		{
-			Run();
+			Run(assemblerOptions: AssemblerOptions.Library | AssemblerOptions.UseLegacyAssembler);
 		}
 
 		[Test]
@@ -232,12 +232,13 @@ namespace ICSharpCode.Decompiler.Tests
 			Run();
 		}
 
-		void Run([CallerMemberName] string testName = null, DecompilerSettings settings = null)
+		void Run([CallerMemberName] string testName = null, DecompilerSettings settings = null,
+			AssemblerOptions assemblerOptions = AssemblerOptions.Library)
 		{
 			var ilFile = Path.Combine(TestCasePath, testName + ".il");
 			var csFile = Path.Combine(TestCasePath, testName + ".cs");
 
-			var executable = Tester.AssembleIL(ilFile, AssemblerOptions.Library);
+			var executable = Tester.AssembleIL(ilFile, assemblerOptions);
 			var decompiled = Tester.DecompileCSharp(executable, settings);
 
 			CodeAssert.FilesAreEqual(csFile, decompiled);

ICSharpCode.Decompiler.Tests/TestCases/ILPretty/Unsafe.il

@@ -6,6 +6,12 @@
   .ver 4:0:0:0
 }
 
+.assembly extern System.Console
+{
+  .publickeytoken = (B0 3F 5F 7F 11 D5 0A 3A )
+  .ver 4:0:0:0
+}
+
 .assembly System.Runtime.CompilerServices.Unsafe
 {
   .custom instance void [CORE_ASSEMBLY]System.Runtime.CompilerServices.CompilationRelaxationsAttribute::.ctor(int32) = ( 01 00 08 00 00 00 00 00 ) 
@@ -495,7 +501,7 @@
 lbl:
     ldloc.0
     ldind.i2
-    call       void [mscorlib]System.Console::WriteLine(uint16)
+    call       void [System.Console]System.Console::WriteLine(uint16)
 
     ldloc.0
     ret
@@ -528,7 +534,7 @@ lbl:
 
 	  IL_000c: ldloc.1
 	  IL_000d: ldc.i4.0
-	  IL_000e: ldelema [mscorlib]System.Byte
+	  IL_000e: ldelema [System.Runtime]System.Byte
 	  IL_0013: stloc.2
 	  IL_0014: br.s IL_0019
 
@@ -566,12 +572,12 @@ lbl:
    */
 	.maxstack 3
 	.locals /* 11000004 */ (
-		[0] int32& pinned modopt([mscorlib]System.Runtime.CompilerServices.IsExplicitlyDereferenced) p
+		[0] int32& pinned modopt([System.Runtime]System.Runtime.CompilerServices.IsExplicitlyDereferenced) p
 	)
 
 	IL_0000: ldarg.1
 	IL_0001: ldc.i4.0
-	IL_0002: ldelema [mscorlib]System.Int32 /* 01000016 */
+	IL_0002: ldelema [System.Runtime]System.Int32 /* 01000016 */
 	IL_0007: stloc.0
 	IL_0008: ldloc.0
 	IL_0009: ldind.i4
@@ -581,7 +587,7 @@ lbl:
 	IL_000d: ldarg.2
 	IL_000e: ldloc.0
 	IL_000f: ldind.i4
-	IL_0010: ldelema [mscorlib]System.Int32 /* 01000016 */
+	IL_0010: ldelema [System.Runtime]System.Int32 /* 01000016 */
 	IL_0015: stloc.0
 
 	IL_0016: ldloc.0

packages.props

@@ -5,7 +5,8 @@
     <HumanizerVersion>2.2.0</HumanizerVersion>
     <SystemCollectionsImmutableVersion>5.0.0-preview.8.20407.11</SystemCollectionsImmutableVersion>
     <SystemReflectionMetadataVersion>5.0.0-preview.8.20407.11</SystemReflectionMetadataVersion>
-    <RoslynVersion>3.8.0-3.final</RoslynVersion>
+    <ILAsmVersion>5.0.0-rc.1.20451.14</ILAsmVersion> <!-- Microsoft.NETCore.ILAsm -->
+    <RoslynVersion>3.8.0-3.final</RoslynVersion>     <!-- Microsoft.CodeAnalysis.* -->
     <MonoCecilVersion>0.10.3</MonoCecilVersion>
     <AvalonEditVersion>6.1.0-preview1</AvalonEditVersion>
     <NUnitVersion>3.12.0</NUnitVersion>