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CodeGenFunctionPointersTests.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Reflection.Metadata;
using System.Reflection.Metadata.Ecma335;
using System.Reflection.PortableExecutable;
using Microsoft.Cci;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.CSharp.Test.Utilities;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
using static Microsoft.CodeAnalysis.CSharp.UnitTests.FunctionPointerUtilities;
namespace Microsoft.CodeAnalysis.CSharp.UnitTests.CodeGen
{
public class CodeGenFunctionPointersTests : CSharpTestBase
{
private CompilationVerifier CompileAndVerifyFunctionPointers(
CSharpTestSource sources,
MetadataReference[]? references = null,
Action<ModuleSymbol>? symbolValidator = null,
string? expectedOutput = null,
TargetFramework targetFramework = TargetFramework.Standard,
CSharpCompilationOptions? options = null)
{
var comp = CreateCompilation(
sources,
references,
parseOptions: TestOptions.RegularPreview,
options: options ?? (expectedOutput is null ? TestOptions.UnsafeReleaseDll : TestOptions.UnsafeReleaseExe),
targetFramework: targetFramework);
return CompileAndVerify(comp, symbolValidator: symbolValidator, expectedOutput: expectedOutput, verify: Verification.Skipped);
}
private static CSharpCompilation CreateCompilationWithFunctionPointers(CSharpTestSource source, IEnumerable<MetadataReference>? references = null, CSharpCompilationOptions? options = null, TargetFramework? targetFramework = null)
{
return CreateCompilation(source, references: references, options: options ?? TestOptions.UnsafeReleaseDll, parseOptions: TestOptions.RegularPreview, targetFramework: targetFramework ?? TargetFramework.Net50);
}
private static CSharpCompilation CreateCompilationWithFunctionPointers(CSharpTestSource source, bool includeUnmanagedCallersOnly, CSharpCompilationOptions? options = null)
{
var references = includeUnmanagedCallersOnly
? TargetFrameworkUtil.GetReferences(TargetFramework.Net50)
: TargetFrameworkUtil.GetReferencesWithout(TargetFramework.Net50, "System.Runtime.InteropServices.dll");
return CreateCompilation(source, references: references, options: options ?? TestOptions.UnsafeReleaseDll, parseOptions: TestOptions.RegularPreview, targetFramework: TargetFramework.Empty);
}
private CompilationVerifier CompileAndVerifyFunctionPointersWithIl(string source, string ilStub, Action<ModuleSymbol>? symbolValidator = null, string? expectedOutput = null)
{
var comp = CreateCompilationWithIL(source, ilStub, parseOptions: TestOptions.RegularPreview, options: expectedOutput is null ? TestOptions.UnsafeReleaseDll : TestOptions.UnsafeReleaseExe);
return CompileAndVerify(comp, expectedOutput: expectedOutput, symbolValidator: symbolValidator, verify: Verification.Skipped);
}
private static CSharpCompilation CreateCompilationWithFunctionPointersAndIl(string source, string ilStub, CSharpCompilationOptions? options = null, bool includeUnmanagedCallersOnly = true)
{
var references = includeUnmanagedCallersOnly
? TargetFrameworkUtil.GetReferences(TargetFramework.Net50)
: TargetFrameworkUtil.GetReferencesWithout(TargetFramework.Net50, "System.Runtime.InteropServices.dll");
return CreateCompilationWithIL(source, ilStub, references: references, options: options ?? TestOptions.UnsafeReleaseDll, parseOptions: TestOptions.RegularPreview, targetFramework: TargetFramework.Empty);
}
[Theory]
[InlineData("", CallingConvention.Default)]
[InlineData("managed", CallingConvention.Default)]
[InlineData("unmanaged[Cdecl]", CallingConvention.CDecl)]
[InlineData("unmanaged[Thiscall]", CallingConvention.ThisCall)]
[InlineData("unmanaged[Stdcall]", CallingConvention.Standard)]
[InlineData("unmanaged[Fastcall]", CallingConvention.FastCall)]
[InlineData("unmanaged[@Cdecl]", CallingConvention.CDecl)]
[InlineData("unmanaged[@Thiscall]", CallingConvention.ThisCall)]
[InlineData("unmanaged[@Stdcall]", CallingConvention.Standard)]
[InlineData("unmanaged[@Fastcall]", CallingConvention.FastCall)]
[InlineData("unmanaged", CallingConvention.Unmanaged)]
internal void CallingConventions(string conventionString, CallingConvention expectedConvention)
{
var verifier = CompileAndVerifyFunctionPointers($@"
class C
{{
public unsafe delegate* {conventionString}<string, int> M() => throw null;
}}", symbolValidator: symbolValidator, targetFramework: TargetFramework.NetCoreApp);
symbolValidator(GetSourceModule(verifier));
void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var funcPtr = m.ReturnType;
VerifyFunctionPointerSymbol(funcPtr, expectedConvention,
(RefKind.None, IsSpecialType(SpecialType.System_Int32)),
(RefKind.None, IsSpecialType(SpecialType.System_String)));
}
}
[Fact]
public void MultipleCallingConventions()
{
var comp = CompileAndVerifyFunctionPointers(@"
#pragma warning disable CS0168
unsafe class C
{
public delegate* unmanaged[Thiscall, Stdcall]<void> M() => throw null;
}", symbolValidator: symbolValidator, targetFramework: TargetFramework.NetCoreApp);
void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var funcPtr = m.ReturnType;
AssertEx.Equal("delegate* unmanaged[Thiscall, Stdcall]<System.Void modopt(System.Runtime.CompilerServices.CallConvThiscall) modopt(System.Runtime.CompilerServices.CallConvStdcall)>", funcPtr.ToTestDisplayString());
Assert.Equal(CallingConvention.Unmanaged, ((FunctionPointerTypeSymbol)funcPtr).Signature.CallingConvention);
}
}
[Fact]
public void RefParameters()
{
var verifier = CompileAndVerifyFunctionPointers(@"
class C
{
public unsafe void M(delegate*<ref C, ref string, ref int[]> param1) => throw null;
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var funcPtr = m.ParameterTypesWithAnnotations[0].Type;
VerifyFunctionPointerSymbol(funcPtr, CallingConvention.Default,
(RefKind.Ref, IsArrayType(IsSpecialType(SpecialType.System_Int32))),
(RefKind.Ref, IsTypeName("C")),
(RefKind.Ref, IsSpecialType(SpecialType.System_String)));
}
}
[Fact]
public void OutParameters()
{
var verifier = CompileAndVerifyFunctionPointers(@"
class C
{
public unsafe void M(delegate*<out C, out string, ref int[]> param1) => throw null;
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var funcPtr = m.ParameterTypesWithAnnotations[0].Type;
VerifyFunctionPointerSymbol(funcPtr, CallingConvention.Default,
(RefKind.Ref, IsArrayType(IsSpecialType(SpecialType.System_Int32))),
(RefKind.Out, IsTypeName("C")),
(RefKind.Out, IsSpecialType(SpecialType.System_String)));
}
}
[Fact]
public void NestedFunctionPointers()
{
var verifier = CompileAndVerifyFunctionPointers(@"
public class C
{
public unsafe delegate* unmanaged[Cdecl]<delegate* unmanaged[Stdcall]<int, void>, void> M(delegate*<C, delegate*<S>> param1) => throw null;
}
public struct S
{
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var returnType = m.ReturnType;
VerifyFunctionPointerSymbol(returnType, CallingConvention.CDecl,
(RefKind.None, IsVoidType()),
(RefKind.None, IsFunctionPointerTypeSymbol(CallingConvention.Standard,
(RefKind.None, IsVoidType()),
(RefKind.None, IsSpecialType(SpecialType.System_Int32)))
));
var paramType = m.Parameters[0].Type;
VerifyFunctionPointerSymbol(paramType, CallingConvention.Default,
(RefKind.None, IsFunctionPointerTypeSymbol(CallingConvention.Default,
(RefKind.None, IsTypeName("S")))),
(RefKind.None, IsTypeName("C")));
}
}
[Fact]
public void InModifier()
{
var verifier = CompileAndVerifyFunctionPointers(@"
public class C
{
public unsafe void M(delegate*<in string, in int, ref readonly bool> param) {}
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var paramType = m.Parameters[0].Type;
VerifyFunctionPointerSymbol(paramType, CallingConvention.Default,
(RefKind.RefReadOnly, IsSpecialType(SpecialType.System_Boolean)),
(RefKind.In, IsSpecialType(SpecialType.System_String)),
(RefKind.In, IsSpecialType(SpecialType.System_Int32)));
}
}
[Fact]
public void BadReturnModReqs()
{
var il = @"
.class public auto ansi beforefieldinit C
extends [mscorlib]System.Object
{
.field public method int32 modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)& *() 'Field1'
.field public method int32& modreq([mscorlib]System.Runtime.InteropServices.OutAttribute) *() 'Field2'
.field public method int32& modreq([mscorlib]System.Runtime.InteropServices.OutAttribute) modreq([mscorlib]System.Runtime.InteropServices.InAttribute) *() 'Field3'
.field public method int32& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) modreq([mscorlib]System.Runtime.InteropServices.OutAttribute) *() 'Field4'
.field public method int32 modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) *() 'Field5'
.field public method int32 modreq([mscorlib]System.Runtime.InteropServices.InAttribute)& *() 'Field6'
.field public method int32 modreq([mscorlib]System.Object)& *() 'Field7'
.field public method int32& modreq([mscorlib]System.Object) *() 'Field8'
.field static public method method int32 modreq([mscorlib]System.Object) *() *() 'Field9'
}
";
var source = @"
class D
{
void M(C c)
{
ref int i1 = ref c.Field1();
ref int i2 = ref c.Field2();
c.Field1 = c.Field1;
c.Field2 = c.Field2;
}
}";
var comp = CreateCompilationWithFunctionPointersAndIl(source, il);
comp.VerifyDiagnostics(
// (6,26): error CS0570: 'delegate*<ref int>' is not supported by the language
// ref int i1 = ref c.Field1();
Diagnostic(ErrorCode.ERR_BindToBogus, "c.Field1()").WithArguments("delegate*<ref int>").WithLocation(6, 26),
// (6,28): error CS0570: 'C.Field1' is not supported by the language
// ref int i1 = ref c.Field1();
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(6, 28),
// (7,26): error CS0570: 'delegate*<ref int>' is not supported by the language
// ref int i2 = ref c.Field2();
Diagnostic(ErrorCode.ERR_BindToBogus, "c.Field2()").WithArguments("delegate*<ref int>").WithLocation(7, 26),
// (7,28): error CS0570: 'C.Field2' is not supported by the language
// ref int i2 = ref c.Field2();
Diagnostic(ErrorCode.ERR_BindToBogus, "Field2").WithArguments("C.Field2").WithLocation(7, 28),
// (8,11): error CS0570: 'C.Field1' is not supported by the language
// c.Field1 = c.Field1;
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(8, 11),
// (8,22): error CS0570: 'C.Field1' is not supported by the language
// c.Field1 = c.Field1;
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(8, 22),
// (9,11): error CS0570: 'C.Field2' is not supported by the language
// c.Field2 = c.Field2;
Diagnostic(ErrorCode.ERR_BindToBogus, "Field2").WithArguments("C.Field2").WithLocation(9, 11),
// (9,22): error CS0570: 'C.Field2' is not supported by the language
// c.Field2 = c.Field2;
Diagnostic(ErrorCode.ERR_BindToBogus, "Field2").WithArguments("C.Field2").WithLocation(9, 22)
);
var c = comp.GetTypeByMetadataName("C");
for (int i = 1; i <= 9; i++)
{
var field = c.GetField($"Field{i}");
Assert.True(field.HasUseSiteError);
Assert.True(field.HasUnsupportedMetadata);
Assert.Equal(TypeKind.FunctionPointer, field.Type.TypeKind);
var signature = ((FunctionPointerTypeSymbol)field.Type).Signature;
Assert.True(signature.HasUseSiteError);
Assert.True(signature.HasUnsupportedMetadata);
Assert.True(field.Type.HasUseSiteError);
Assert.True(field.Type.HasUnsupportedMetadata);
}
}
[Fact]
public void BadParamModReqs()
{
var il = @"
.class public auto ansi beforefieldinit C
extends [mscorlib]System.Object
{
.field public method void *(int32& modreq([mscorlib]System.Runtime.InteropServices.OutAttribute) modreq([mscorlib]System.Runtime.InteropServices.InAttribute)) 'Field1'
.field public method void *(int32& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)) 'Field2'
.field public method void *(int32 modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)& modreq([mscorlib]System.Runtime.InteropServices.InAttribute)) 'Field3'
.field public method void *(int32 modreq([mscorlib]System.Runtime.InteropServices.InAttribute)& modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)) 'Field4'
.field public method void *(int32 modreq([mscorlib]System.Runtime.InteropServices.InAttribute)&) 'Field5'
.field public method void *(int32 modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)&) 'Field6'
.field public method void *(int32& modreq([mscorlib]System.Object)) 'Field7'
.field public method void *(int32 modreq([mscorlib]System.Object)&) 'Field8'
.field public method void *(method void *(int32 modreq([mscorlib]System.Object))) 'Field9'
}
";
var source = @"
class D
{
void M(C c)
{
int i = 1;
c.Field1(ref i);
c.Field1(in i);
c.Field1(out i);
c.Field1 = c.Field1;
}
}";
var comp = CreateCompilationWithFunctionPointersAndIl(source, il);
comp.VerifyDiagnostics(
// (7,9): error CS0570: 'delegate*<in int, void>' is not supported by the language
// c.Field1(ref i);
Diagnostic(ErrorCode.ERR_BindToBogus, "c.Field1(ref i)").WithArguments("delegate*<in int, void>").WithLocation(7, 9),
// (7,11): error CS0570: 'C.Field1' is not supported by the language
// c.Field1(ref i);
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(7, 11),
// (8,9): error CS0570: 'delegate*<in int, void>' is not supported by the language
// c.Field1(in i);
Diagnostic(ErrorCode.ERR_BindToBogus, "c.Field1(in i)").WithArguments("delegate*<in int, void>").WithLocation(8, 9),
// (8,11): error CS0570: 'C.Field1' is not supported by the language
// c.Field1(in i);
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(8, 11),
// (9,9): error CS0570: 'delegate*<in int, void>' is not supported by the language
// c.Field1(out i);
Diagnostic(ErrorCode.ERR_BindToBogus, "c.Field1(out i)").WithArguments("delegate*<in int, void>").WithLocation(9, 9),
// (9,11): error CS0570: 'C.Field1' is not supported by the language
// c.Field1(out i);
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(9, 11),
// (10,11): error CS0570: 'C.Field1' is not supported by the language
// c.Field1 = c.Field1;
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(10, 11),
// (10,22): error CS0570: 'C.Field1' is not supported by the language
// c.Field1 = c.Field1;
Diagnostic(ErrorCode.ERR_BindToBogus, "Field1").WithArguments("C.Field1").WithLocation(10, 22)
);
var c = comp.GetTypeByMetadataName("C");
for (int i = 1; i <= 9; i++)
{
var field = c.GetField($"Field{i}");
Assert.True(field.HasUseSiteError);
Assert.True(field.HasUnsupportedMetadata);
Assert.Equal(TypeKind.FunctionPointer, field.Type.TypeKind);
var signature = ((FunctionPointerTypeSymbol)field.Type).Signature;
Assert.True(signature.HasUseSiteError);
Assert.True(signature.HasUnsupportedMetadata);
Assert.True(field.Type.HasUseSiteError);
Assert.True(field.Type.HasUnsupportedMetadata);
}
}
[Fact]
public void ValidModReqsAndOpts()
{
var il = @"
.class public auto ansi beforefieldinit C
extends [mscorlib]System.Object
{
.field static public method int32& modopt([mscorlib]System.Runtime.InteropServices.OutAttribute) modreq([mscorlib]System.Runtime.InteropServices.InAttribute) *() 'Field1'
.field static public method int32& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) modopt([mscorlib]System.Runtime.InteropServices.OutAttribute) *() 'Field2'
.field static public method void *(int32& modreq([mscorlib]System.Runtime.InteropServices.OutAttribute) modopt([mscorlib]System.Runtime.InteropServices.InAttribute)) 'Field3'
.field static public method void *(int32& modopt([mscorlib]System.Runtime.InteropServices.OutAttribute) modreq([mscorlib]System.Runtime.InteropServices.InAttribute)) 'Field4'
.field static public method void *(int32& modopt([mscorlib]System.Runtime.InteropServices.InAttribute) modreq([mscorlib]System.Runtime.InteropServices.OutAttribute)) 'Field5'
.field static public method void *(int32& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) modopt([mscorlib]System.Runtime.InteropServices.OutAttribute)) 'Field6'
}
";
var source = @"
using System;
unsafe class D
{
static int i = 1;
static ref readonly int M()
{
return ref i;
}
static void MIn(in int param)
{
Console.Write(param);
}
static void MOut(out int param)
{
param = i;
}
static void Main()
{
TestRefReadonly();
TestOut();
TestIn();
}
static void TestRefReadonly()
{
C.Field1 = &M;
ref readonly int local1 = ref C.Field1();
Console.Write(local1);
i = 2;
Console.Write(local1);
C.Field2 = &M;
i = 3;
ref readonly int local2 = ref C.Field2();
Console.Write(local2);
i = 4;
Console.Write(local2);
}
static void TestOut()
{
C.Field3 = &MOut;
i = 5;
C.Field3(out int local);
Console.Write(local);
C.Field5 = &MOut;
i = 6;
C.Field5(out local);
Console.Write(local);
}
static void TestIn()
{
i = 7;
C.Field4 = &MIn;
C.Field4(in i);
i = 8;
C.Field6 = &MIn;
C.Field6(in i);
}
}";
var verifier = CompileAndVerifyFunctionPointersWithIl(source, il, expectedOutput: "12345678");
verifier.VerifyIL("D.TestRefReadonly", @"
{
// Code size 87 (0x57)
.maxstack 2
IL_0000: ldftn ""ref readonly int D.M()""
IL_0006: stsfld ""delegate*<ref readonly int> C.Field1""
IL_000b: ldsfld ""delegate*<ref readonly int> C.Field1""
IL_0010: calli ""delegate*<ref readonly int>""
IL_0015: dup
IL_0016: ldind.i4
IL_0017: call ""void System.Console.Write(int)""
IL_001c: ldc.i4.2
IL_001d: stsfld ""int D.i""
IL_0022: ldind.i4
IL_0023: call ""void System.Console.Write(int)""
IL_0028: ldftn ""ref readonly int D.M()""
IL_002e: stsfld ""delegate*<ref readonly int> C.Field2""
IL_0033: ldc.i4.3
IL_0034: stsfld ""int D.i""
IL_0039: ldsfld ""delegate*<ref readonly int> C.Field2""
IL_003e: calli ""delegate*<ref readonly int>""
IL_0043: dup
IL_0044: ldind.i4
IL_0045: call ""void System.Console.Write(int)""
IL_004a: ldc.i4.4
IL_004b: stsfld ""int D.i""
IL_0050: ldind.i4
IL_0051: call ""void System.Console.Write(int)""
IL_0056: ret
}
");
verifier.VerifyIL("D.TestOut", @"
{
// Code size 75 (0x4b)
.maxstack 2
.locals init (int V_0, //local
delegate*<out int, void> V_1,
delegate*<out int, void> V_2)
IL_0000: ldftn ""void D.MOut(out int)""
IL_0006: stsfld ""delegate*<out int, void> C.Field3""
IL_000b: ldc.i4.5
IL_000c: stsfld ""int D.i""
IL_0011: ldsfld ""delegate*<out int, void> C.Field3""
IL_0016: stloc.1
IL_0017: ldloca.s V_0
IL_0019: ldloc.1
IL_001a: calli ""delegate*<out int, void>""
IL_001f: ldloc.0
IL_0020: call ""void System.Console.Write(int)""
IL_0025: ldftn ""void D.MOut(out int)""
IL_002b: stsfld ""delegate*<out int, void> C.Field5""
IL_0030: ldc.i4.6
IL_0031: stsfld ""int D.i""
IL_0036: ldsfld ""delegate*<out int, void> C.Field5""
IL_003b: stloc.2
IL_003c: ldloca.s V_0
IL_003e: ldloc.2
IL_003f: calli ""delegate*<out int, void>""
IL_0044: ldloc.0
IL_0045: call ""void System.Console.Write(int)""
IL_004a: ret
}
");
verifier.VerifyIL("D.TestIn", @"
{
// Code size 69 (0x45)
.maxstack 2
.locals init (delegate*<in int, void> V_0,
delegate*<in int, void> V_1)
IL_0000: ldc.i4.7
IL_0001: stsfld ""int D.i""
IL_0006: ldftn ""void D.MIn(in int)""
IL_000c: stsfld ""delegate*<in int, void> C.Field4""
IL_0011: ldsfld ""delegate*<in int, void> C.Field4""
IL_0016: stloc.0
IL_0017: ldsflda ""int D.i""
IL_001c: ldloc.0
IL_001d: calli ""delegate*<in int, void>""
IL_0022: ldc.i4.8
IL_0023: stsfld ""int D.i""
IL_0028: ldftn ""void D.MIn(in int)""
IL_002e: stsfld ""delegate*<in int, void> C.Field6""
IL_0033: ldsfld ""delegate*<in int, void> C.Field6""
IL_0038: stloc.1
IL_0039: ldsflda ""int D.i""
IL_003e: ldloc.1
IL_003f: calli ""delegate*<in int, void>""
IL_0044: ret
}
");
var c = ((CSharpCompilation)verifier.Compilation).GetTypeByMetadataName("C");
var field = c.GetField("Field1");
VerifyFunctionPointerSymbol(field.Type, CallingConvention.Default,
(RefKind.RefReadOnly, IsSpecialType(SpecialType.System_Int32)));
field = c.GetField("Field2");
VerifyFunctionPointerSymbol(field.Type, CallingConvention.Default,
(RefKind.RefReadOnly, IsSpecialType(SpecialType.System_Int32)));
field = c.GetField("Field3");
VerifyFunctionPointerSymbol(field.Type, CallingConvention.Default,
(RefKind.None, IsVoidType()),
(RefKind.Out, IsSpecialType(SpecialType.System_Int32)));
field = c.GetField("Field4");
VerifyFunctionPointerSymbol(field.Type, CallingConvention.Default,
(RefKind.None, IsVoidType()),
(RefKind.In, IsSpecialType(SpecialType.System_Int32)));
field = c.GetField("Field5");
VerifyFunctionPointerSymbol(field.Type, CallingConvention.Default,
(RefKind.None, IsVoidType()),
(RefKind.Out, IsSpecialType(SpecialType.System_Int32)));
field = c.GetField("Field6");
VerifyFunctionPointerSymbol(field.Type, CallingConvention.Default,
(RefKind.None, IsVoidType()),
(RefKind.In, IsSpecialType(SpecialType.System_Int32)));
}
[Fact]
public void RefReadonlyIsDoneByRef()
{
var verifier = CompileAndVerifyFunctionPointers(@"
using System;
unsafe class C
{
private static int i = 0;
static ref readonly int GetI() => ref i;
static void Main()
{
delegate*<ref readonly int> d = &GetI;
ref readonly int local = ref d();
Console.Write(local);
i = 1;
Console.Write(local);
}
}
", expectedOutput: "01");
verifier.VerifyIL("C.Main", @"
{
// Code size 31 (0x1f)
.maxstack 2
IL_0000: ldftn ""ref readonly int C.GetI()""
IL_0006: calli ""delegate*<ref readonly int>""
IL_000b: dup
IL_000c: ldind.i4
IL_000d: call ""void System.Console.Write(int)""
IL_0012: ldc.i4.1
IL_0013: stsfld ""int C.i""
IL_0018: ldind.i4
IL_0019: call ""void System.Console.Write(int)""
IL_001e: ret
}
");
}
[Fact]
public void NestedPointerTypes()
{
var verifier = CompileAndVerifyFunctionPointers(@"
public class C
{
public unsafe delegate* unmanaged[Cdecl]<ref delegate*<ref readonly string>, void> M(delegate*<in delegate* unmanaged[Stdcall]<delegate*<void>>, delegate*<int>> param) => throw null;
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
var returnType = m.ReturnType;
var paramType = m.Parameters[0].Type;
VerifyFunctionPointerSymbol(returnType, CallingConvention.CDecl,
(RefKind.None, IsVoidType()),
(RefKind.Ref,
IsFunctionPointerTypeSymbol(CallingConvention.Default,
(RefKind.RefReadOnly, IsSpecialType(SpecialType.System_String)))));
VerifyFunctionPointerSymbol(paramType, CallingConvention.Default,
(RefKind.None,
IsFunctionPointerTypeSymbol(CallingConvention.Default,
(RefKind.None, IsSpecialType(SpecialType.System_Int32)))),
(RefKind.In,
IsFunctionPointerTypeSymbol(CallingConvention.Standard,
(RefKind.None,
IsFunctionPointerTypeSymbol(CallingConvention.Default,
(RefKind.None, IsVoidType()))))));
}
}
[Fact]
public void RandomModOptsFromIl()
{
var ilSource = @"
.class public auto ansi beforefieldinit Test1
extends[mscorlib] System.Object
{
.method public hidebysig instance void M(method bool modopt([mscorlib]System.Runtime.InteropServices.OutAttribute)& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) modopt([mscorlib]System.Runtime.InteropServices.ComImport) *(int32 modopt([mscorlib]System.Runtime.InteropServices.AllowReversePInvokeCallsAttribute)& modreq([mscorlib]System.Runtime.InteropServices.InAttribute) modopt([mscorlib]System.Runtime.InteropServices.PreserveSigAttribute)) param) cil managed
{
// Code size 2 (0x2)
.maxstack 8
IL_0000: nop
IL_0001: ret
} // end of method Test::M
}
";
var compilation = CreateCompilationWithIL(source: "", ilSource, parseOptions: TestOptions.RegularPreview);
var testClass = compilation.GetTypeByMetadataName("Test1")!;
var m = testClass.GetMethod("M");
Assert.NotNull(m);
var param = (FunctionPointerTypeSymbol)m.Parameters[0].Type;
VerifyFunctionPointerSymbol(param, CallingConvention.Default,
(RefKind.RefReadOnly, IsSpecialType(SpecialType.System_Boolean)),
(RefKind.In, IsSpecialType(SpecialType.System_Int32)));
var returnModifiers = param.Signature.ReturnTypeWithAnnotations.CustomModifiers;
verifyMod(1, "OutAttribute", returnModifiers);
var returnRefModifiers = param.Signature.RefCustomModifiers;
verifyMod(2, "ComImport", returnRefModifiers);
var paramModifiers = param.Signature.ParameterTypesWithAnnotations[0].CustomModifiers;
verifyMod(1, "AllowReversePInvokeCallsAttribute", paramModifiers);
var paramRefModifiers = param.Signature.Parameters[0].RefCustomModifiers;
verifyMod(2, "PreserveSigAttribute", paramRefModifiers);
static void verifyMod(int length, string expectedTypeName, ImmutableArray<CustomModifier> customMods)
{
Assert.Equal(length, customMods.Length);
var firstMod = customMods[0];
Assert.True(firstMod.IsOptional);
Assert.Equal(expectedTypeName, ((CSharpCustomModifier)firstMod).ModifierSymbol.Name);
if (length > 1)
{
Assert.Equal(2, customMods.Length);
var inMod = customMods[1];
Assert.False(inMod.IsOptional);
Assert.True(((CSharpCustomModifier)inMod).ModifierSymbol.IsWellKnownTypeInAttribute());
}
}
}
[Fact]
public void MultipleFunctionPointerArguments()
{
var verifier = CompileAndVerifyFunctionPointers(@"
public unsafe class C
{
public void M(delegate*<ref int, ref bool> param1,
delegate*<ref int, ref bool> param2,
delegate*<ref int, ref bool> param3,
delegate*<ref int, ref bool> param4,
delegate*<ref int, ref bool> param5) {}
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
var m = c.GetMethod("M");
foreach (var param in m.Parameters)
{
VerifyFunctionPointerSymbol(param.Type, CallingConvention.Default,
(RefKind.Ref, IsSpecialType(SpecialType.System_Boolean)),
(RefKind.Ref, IsSpecialType(SpecialType.System_Int32)));
}
}
}
[Fact]
public void FunctionPointersInProperties()
{
var verifier = CompileAndVerifyFunctionPointers(@"
public unsafe class C
{
public delegate*<string, void> Prop1 { get; set; }
public delegate* unmanaged[Stdcall]<int> Prop2 { get => throw null; set => throw null; }
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
verifier.VerifyIL("C.Prop1.get", expectedIL: @"
{
// Code size 7 (0x7)
.maxstack 1
IL_0000: ldarg.0
IL_0001: ldfld ""delegate*<string, void> C.<Prop1>k__BackingField""
IL_0006: ret
}
");
verifier.VerifyIL("C.Prop1.set", expectedIL: @"
{
// Code size 8 (0x8)
.maxstack 2
IL_0000: ldarg.0
IL_0001: ldarg.1
IL_0002: stfld ""delegate*<string, void> C.<Prop1>k__BackingField""
IL_0007: ret
}
");
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
validateProperty((PropertySymbol)c.GetProperty((string)"Prop1"), IsFunctionPointerTypeSymbol(CallingConvention.Default,
(RefKind.None, IsVoidType()),
(RefKind.None, IsSpecialType(SpecialType.System_String))));
validateProperty(c.GetProperty("Prop2"), IsFunctionPointerTypeSymbol(CallingConvention.Standard,
(RefKind.None, IsSpecialType(SpecialType.System_Int32))));
static void validateProperty(PropertySymbol property, Action<TypeSymbol> verifier)
{
verifier(property.Type);
verifier(property.GetMethod.ReturnType);
verifier(property.SetMethod.GetParameterType(0));
}
}
}
[Fact]
public void FunctionPointersInFields()
{
var verifier = CompileAndVerifyFunctionPointers(@"
public unsafe class C
{
public readonly delegate*<C, C> _field;
}", symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var c = module.GlobalNamespace.GetMember<NamedTypeSymbol>("C");
VerifyFunctionPointerSymbol(c.GetField("_field").Type, CallingConvention.Default,
(RefKind.None, IsTypeName("C")),
(RefKind.None, IsTypeName("C")));
}
}
[Fact]
public void CustomModifierOnReturnType()
{
var ilSource = @"
.class public auto ansi beforefieldinit C
extends[mscorlib] System.Object
{
.method public hidebysig newslot virtual instance method bool modopt([mscorlib]System.Object)& *(int32&) M() cil managed
{
// Code size 2 (0x2)
.maxstack 8
IL_0000: nop
IL_0001: ret
} // end of method C::M
.method public hidebysig specialname rtspecialname
instance void .ctor() cil managed
{
// Code size 8 (0x8)
.maxstack 8
IL_0000: ldarg.0
IL_0001: call instance void [mscorlib]System.Object::.ctor()
IL_0006: nop
IL_0007: ret
} // end of method C::.ctor
}
";
var source = @"
class D : C
{
public unsafe override delegate*<ref int, ref bool> M() => throw null;
}";
var verifier = CompileAndVerifyFunctionPointersWithIl(source, ilStub: ilSource, symbolValidator: symbolValidator);
symbolValidator(GetSourceModule(verifier));
static void symbolValidator(ModuleSymbol module)
{
var d = module.GlobalNamespace.GetMember<NamedTypeSymbol>("D");
var m = d.GetMethod("M");
var returnTypeWithAnnotations = ((FunctionPointerTypeSymbol)m.ReturnType).Signature.ReturnTypeWithAnnotations;
Assert.Equal(1, returnTypeWithAnnotations.CustomModifiers.Length);
Assert.Equal(SpecialType.System_Object, returnTypeWithAnnotations.CustomModifiers[0].Modifier.SpecialType);
}
}
[Fact]
public void UnsupportedCallingConventionInMetadata()
{
var ilSource = @"
.class public auto ansi beforefieldinit C
extends [mscorlib]System.Object
{
.field public method vararg void*() 'Field'
.field private method vararg void *() '<Prop>k__BackingField'
.custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
.custom instance void [mscorlib]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [mscorlib]System.Diagnostics.DebuggerBrowsableState) = ( 01 00 00 00 00 00 00 00 )
.method public hidebysig specialname rtspecialname
instance void .ctor() cil managed
{
// Code size 8 (0x8)
.maxstack 8
IL_0000: ldarg.0
IL_0001: call instance void [mscorlib]System.Object::.ctor()
IL_0006: nop
IL_0007: ret
} // end of method C::.ctor
.method public hidebysig specialname instance method vararg void *()
get_Prop() cil managed
{
.custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
// Code size 7 (0x7)
.maxstack 8
IL_0000: ldarg.0
IL_0001: ldfld method vararg void *() C::'<Prop>k__BackingField'
IL_0006: ret
} // end of method C::get_Prop
.method public hidebysig specialname instance void
set_Prop(method vararg void *() 'value') cil managed
{
.custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 )
// Code size 8 (0x8)
.maxstack 8
IL_0000: ldarg.0
IL_0001: ldarg.1
IL_0002: stfld method vararg void *() C::'<Prop>k__BackingField'
IL_0007: ret
} // end of method C::set_Prop
.property instance method vararg void *()
Prop()
{
.get instance method vararg void *() C::get_Prop()
.set instance void C::set_Prop(method vararg void *())
} // end of property C::Prop
} // end of class C
";
var source = @"
unsafe class D
{
void M(C c)
{
c.Field(__arglist(1, 2));
c.Field(1, 2, 3);
c.Field();
c.Field = c.Field;
c.Prop();
c.Prop = c.Prop;
}
}
";
var comp = CreateCompilationWithFunctionPointersAndIl(source, ilSource);
comp.VerifyDiagnostics(
// (6,9): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field(__arglist(1, 2));
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "c.Field(__arglist(1, 2))").WithArguments("delegate* unmanaged[]<void>").WithLocation(6, 9),
// (6,11): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field(__arglist(1, 2));
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Field").WithArguments("delegate* unmanaged[]<void>").WithLocation(6, 11),
// (7,9): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field(1, 2, 3);
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "c.Field(1, 2, 3)").WithArguments("delegate* unmanaged[]<void>").WithLocation(7, 9),
// (7,11): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field(1, 2, 3);
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Field").WithArguments("delegate* unmanaged[]<void>").WithLocation(7, 11),
// (8,9): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field();
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "c.Field()").WithArguments("delegate* unmanaged[]<void>").WithLocation(8, 9),
// (8,11): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field();
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Field").WithArguments("delegate* unmanaged[]<void>").WithLocation(8, 11),
// (9,11): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field = c.Field;
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Field").WithArguments("delegate* unmanaged[]<void>").WithLocation(9, 11),
// (9,21): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Field = c.Field;
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Field").WithArguments("delegate* unmanaged[]<void>").WithLocation(9, 21),
// (10,9): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Prop();
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "c.Prop()").WithArguments("delegate* unmanaged[]<void>").WithLocation(10, 9),
// (10,11): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Prop();
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Prop").WithArguments("delegate* unmanaged[]<void>").WithLocation(10, 11),
// (11,11): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Prop = c.Prop;
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Prop").WithArguments("delegate* unmanaged[]<void>").WithLocation(11, 11),
// (11,20): error CS8806: The calling convention of 'delegate* unmanaged[]<void>' is not supported by the language.
// c.Prop = c.Prop;
Diagnostic(ErrorCode.ERR_UnsupportedCallingConvention, "Prop").WithArguments("delegate* unmanaged[]<void>").WithLocation(11, 20)
);
var c = comp.GetTypeByMetadataName("C");
var prop = c.GetProperty("Prop");
VerifyFunctionPointerSymbol(prop.Type, CallingConvention.ExtraArguments,
(RefKind.None, IsVoidType()));
Assert.True(prop.Type.HasUseSiteError);
var field = c.GetField("Field");
var type = (FunctionPointerTypeSymbol)field.Type;
VerifyFunctionPointerSymbol(type, CallingConvention.ExtraArguments,
(RefKind.None, IsVoidType()));
Assert.True(type.HasUseSiteError);
Assert.True(type.Signature.IsVararg);
}