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Merge pull request #626 from nattress/interface_dispatch
Interface dispatch support
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48 changes: 48 additions & 0 deletions
48
src/Common/src/TypeSystem/Common/MetadataType.MethodImpls.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| // Copyright (c) Microsoft. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
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| using System; | ||
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| namespace Internal.TypeSystem | ||
| { | ||
| public struct MethodImplRecord | ||
| { | ||
| public MethodDesc Decl; | ||
| public MethodDesc Body; | ||
| } | ||
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| // MethodImpl api surface for types. | ||
| public partial class MetadataType | ||
| { | ||
| /// <summary> | ||
| /// Compute an array of all MethodImpls that pertain to overriding virtual (non-interface methods) on this type. | ||
| /// May be expensive. | ||
| /// </summary> | ||
| protected abstract MethodImplRecord[] ComputeVirtualMethodImplsForType(); | ||
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| private MethodImplRecord[] _allVirtualMethodImplsForType; | ||
| /// <summary> | ||
| /// Get an array of all MethodImpls that pertain to overriding virtual (non-interface methods) on this type. | ||
| /// Expected to cache results so this api can be used repeatedly. | ||
| /// </summary> | ||
| public MethodImplRecord[] VirtualMethodImplsForType | ||
| { | ||
| get | ||
| { | ||
| if (_allVirtualMethodImplsForType == null) | ||
| { | ||
| _allVirtualMethodImplsForType = ComputeVirtualMethodImplsForType(); | ||
| } | ||
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| return _allVirtualMethodImplsForType; | ||
| } | ||
| } | ||
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| /// <summary> | ||
| /// Get an array of MethodImpls where the Decl method matches by name with the specified name. | ||
| /// </summary> | ||
| /// <param name="name"></param> | ||
| /// <returns></returns> | ||
| public abstract MethodImplRecord[] FindMethodsImplWithMatchingDeclName(string name); | ||
| } | ||
| } |
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87 changes: 87 additions & 0 deletions
87
src/ILCompiler.Compiler/src/Compiler/DependencyAnalysis/InterfaceDispatchCellNode.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| // Copyright (c) Microsoft. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
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| using Internal.TypeSystem; | ||
| using System; | ||
| using System.Diagnostics; | ||
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| namespace ILCompiler.DependencyAnalysis | ||
| { | ||
| class InterfaceDispatchCellNode : ObjectNode, ISymbolNode | ||
| { | ||
| MethodDesc _targetMethod; | ||
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| public InterfaceDispatchCellNode(MethodDesc targetMethod) | ||
| { | ||
| Debug.Assert(targetMethod.OwningType.IsInterface); | ||
| _targetMethod = targetMethod; | ||
| } | ||
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| public string MangledName | ||
| { | ||
| get | ||
| { | ||
| return "__InterfaceDispatchCell_" + NodeFactory.NameMangler.GetMangledMethodName(_targetMethod); | ||
| } | ||
| } | ||
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| public override string GetName() | ||
| { | ||
| return ((ISymbolNode)this).MangledName; | ||
| } | ||
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| public int Offset | ||
| { | ||
| get | ||
| { | ||
| return 0; | ||
| } | ||
| } | ||
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| public override string Section | ||
| { | ||
| get | ||
| { | ||
| return "data"; | ||
| } | ||
| } | ||
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| public override bool StaticDependenciesAreComputed | ||
| { | ||
| get | ||
| { | ||
| return true; | ||
| } | ||
| } | ||
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| public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false) | ||
| { | ||
| ObjectDataBuilder objData = new ObjectDataBuilder(factory); | ||
| // The interface dispatch cell has an alignment requirement of 2 * [Pointer size] as part of the | ||
| // synchronization mechanism of the two values in the runtime. | ||
| objData.Alignment = _targetMethod.Context.Target.PointerSize * 2; | ||
| objData.DefinedSymbols.Add(this); | ||
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| objData.EmitPointerReloc(factory.ExternSymbol("RhpInitialDynamicInterfaceDispatch")); | ||
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| // The second cell field uses the two lower-order bits to communicate the contents. | ||
| // We add 1 to signal IDC_CachePointerIsInterfacePointer. See src\Native\Runtime\inc\rhbinder.h. | ||
| objData.EmitPointerReloc(factory.NecessaryTypeSymbol(_targetMethod.OwningType), 1); | ||
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| // End the run of dispatch cells | ||
| objData.EmitZeroPointer(); | ||
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| int interfaceMethodSlot = VirtualMethodSlotHelper.GetVirtualMethodSlot(factory, _targetMethod); | ||
| if (factory.Target.PointerSize == 8) | ||
| { | ||
| objData.EmitLong(interfaceMethodSlot); | ||
| } | ||
| else | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
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| return objData.ToObjectData(); | ||
| } | ||
| } | ||
| } |
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