mirror of https://github.com/icsharpcode/ILSpy.git
Siegfried Pammer
2 years ago
117 changed files with 885 additions and 763 deletions
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// Copyright (c) 2024 Siegfried Pammer
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#nullable enable |
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using System; |
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using System.Collections.Generic; |
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using System.Collections.Immutable; |
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using System.Diagnostics; |
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using System.Linq; |
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using System.Reflection.Metadata; |
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using System.Reflection.PortableExecutable; |
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using ICSharpCode.Decompiler.TypeSystem; |
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using ICSharpCode.Decompiler.Util; |
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namespace ICSharpCode.Decompiler.Metadata |
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{ |
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/// <summary>
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/// MetadataFile is the main class the decompiler uses to represent a metadata assembly/module.
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/// Every file on disk can be loaded into a standalone MetadataFile instance.
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///
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/// A MetadataFile can be combined with its referenced assemblies/modules to form a type system,
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/// in that case the <see cref="MetadataModule"/> class is used instead.
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/// </summary>
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/// <remarks>
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/// In addition to wrapping a <c>System.Reflection.Metadata.MetadataReader</c>, this class
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/// contains a few decompiler-specific caches to allow efficiently constructing a type
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/// system from multiple MetadataFiles. This allows the caches to be shared across multiple
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/// decompiled type systems.
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/// </remarks>
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[DebuggerDisplay("{Kind}: {FileName}")] |
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public class MetadataFile |
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{ |
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public enum MetadataFileKind |
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{ |
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PortableExecutable, |
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ProgramDebugDatabase, |
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Metadata |
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} |
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public string FileName { get; } |
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public MetadataFileKind Kind { get; } |
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public MetadataReader Metadata { get; } |
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public virtual int MetadataOffset { get; } |
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public virtual bool IsEmbedded { get; } |
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public bool IsAssembly => Metadata.IsAssembly; |
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string? name; |
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public string Name { |
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get { |
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var value = LazyInit.VolatileRead(ref name); |
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if (value == null) |
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{ |
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var metadata = Metadata; |
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value = metadata.IsAssembly |
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? metadata.GetString(metadata.GetAssemblyDefinition().Name) |
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: metadata.GetString(metadata.GetModuleDefinition().Name); |
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value = LazyInit.GetOrSet(ref name, value); |
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} |
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return value; |
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} |
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} |
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string? fullName; |
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public string FullName { |
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get { |
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var value = LazyInit.VolatileRead(ref fullName); |
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if (value == null) |
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{ |
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var metadata = Metadata; |
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value = metadata.IsAssembly ? metadata.GetFullAssemblyName() : Name; |
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value = LazyInit.GetOrSet(ref fullName, value); |
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} |
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return value; |
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} |
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} |
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public TargetRuntime GetRuntime() |
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{ |
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string version = Metadata.MetadataVersion; |
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if (version == null || version.Length <= 1) |
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return TargetRuntime.Unknown; |
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switch (version[1]) |
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{ |
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case '1': |
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if (version.Length <= 3) |
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return TargetRuntime.Unknown; |
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if (version[3] == 1) |
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return TargetRuntime.Net_1_0; |
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else |
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return TargetRuntime.Net_1_1; |
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case '2': |
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return TargetRuntime.Net_2_0; |
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case '4': |
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return TargetRuntime.Net_4_0; |
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default: |
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return TargetRuntime.Unknown; |
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} |
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} |
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ImmutableArray<AssemblyReference> assemblyReferences; |
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public ImmutableArray<AssemblyReference> AssemblyReferences { |
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get { |
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var value = assemblyReferences; |
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if (value.IsDefault) |
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{ |
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value = Metadata.AssemblyReferences.Select(r => new AssemblyReference(this.Metadata, r)).ToImmutableArray(); |
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assemblyReferences = value; |
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} |
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return value; |
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} |
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} |
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ImmutableArray<ModuleReferenceMetadata> moduleReferences; |
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public ImmutableArray<ModuleReferenceMetadata> ModuleReferences { |
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get { |
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var value = moduleReferences; |
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if (value.IsDefault) |
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{ |
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value = Metadata.GetModuleReferences() |
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.Select(m => new ModuleReferenceMetadata(this.Metadata, m)) |
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.ToImmutableArray(); |
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moduleReferences = value; |
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} |
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return value; |
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} |
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} |
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public ImmutableArray<Resource> Resources => GetResources().ToImmutableArray(); |
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IEnumerable<Resource> GetResources() |
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{ |
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var metadata = Metadata; |
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foreach (var h in metadata.ManifestResources) |
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{ |
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yield return new MetadataResource(this, h); |
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} |
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} |
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Dictionary<TopLevelTypeName, TypeDefinitionHandle>? typeLookup; |
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/// <summary>
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/// Finds the top-level-type with the specified name.
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/// </summary>
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public TypeDefinitionHandle GetTypeDefinition(TopLevelTypeName typeName) |
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{ |
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var lookup = LazyInit.VolatileRead(ref typeLookup); |
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if (lookup == null) |
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{ |
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lookup = new Dictionary<TopLevelTypeName, TypeDefinitionHandle>(); |
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foreach (var handle in Metadata.TypeDefinitions) |
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{ |
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var td = Metadata.GetTypeDefinition(handle); |
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if (!td.GetDeclaringType().IsNil) |
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{ |
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continue; // nested type
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} |
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var nsHandle = td.Namespace; |
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string ns = nsHandle.IsNil ? string.Empty : Metadata.GetString(nsHandle); |
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string name = ReflectionHelper.SplitTypeParameterCountFromReflectionName(Metadata.GetString(td.Name), out int typeParameterCount); |
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lookup[new TopLevelTypeName(ns, name, typeParameterCount)] = handle; |
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} |
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lookup = LazyInit.GetOrSet(ref typeLookup, lookup); |
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} |
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if (lookup.TryGetValue(typeName, out var resultHandle)) |
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return resultHandle; |
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else |
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return default; |
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} |
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Dictionary<FullTypeName, ExportedTypeHandle>? typeForwarderLookup; |
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/// <summary>
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/// Finds the type forwarder with the specified name.
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/// </summary>
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public ExportedTypeHandle GetTypeForwarder(FullTypeName typeName) |
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{ |
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var lookup = LazyInit.VolatileRead(ref typeForwarderLookup); |
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if (lookup == null) |
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{ |
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lookup = new Dictionary<FullTypeName, ExportedTypeHandle>(); |
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foreach (var handle in Metadata.ExportedTypes) |
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{ |
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var td = Metadata.GetExportedType(handle); |
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lookup[td.GetFullTypeName(Metadata)] = handle; |
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} |
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lookup = LazyInit.GetOrSet(ref typeForwarderLookup, lookup); |
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} |
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if (lookup.TryGetValue(typeName, out var resultHandle)) |
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return resultHandle; |
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else |
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return default; |
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} |
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MethodSemanticsLookup? methodSemanticsLookup; |
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internal MethodSemanticsLookup MethodSemanticsLookup { |
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get { |
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var r = LazyInit.VolatileRead(ref methodSemanticsLookup); |
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if (r != null) |
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return r; |
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else |
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return LazyInit.GetOrSet(ref methodSemanticsLookup, new MethodSemanticsLookup(Metadata)); |
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} |
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} |
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public MetadataFile(MetadataFileKind kind, string fileName, MetadataReaderProvider metadata, MetadataReaderOptions metadataOptions = MetadataReaderOptions.Default, int metadataOffset = 0, bool isEmbedded = false) |
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{ |
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this.Kind = kind; |
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this.FileName = fileName; |
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this.Metadata = metadata.GetMetadataReader(metadataOptions); |
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this.MetadataOffset = metadataOffset; |
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this.IsEmbedded = isEmbedded; |
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} |
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private protected MetadataFile(MetadataFileKind kind, string fileName, PEReader reader, MetadataReaderOptions metadataOptions = MetadataReaderOptions.Default) |
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{ |
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this.Kind = kind; |
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this.FileName = fileName ?? throw new ArgumentNullException(nameof(fileName)); |
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_ = reader ?? throw new ArgumentNullException(nameof(reader)); |
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if (!reader.HasMetadata) |
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throw new MetadataFileNotSupportedException("PE file does not contain any managed metadata."); |
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this.Metadata = reader.GetMetadataReader(metadataOptions); |
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} |
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public virtual MethodBodyBlock GetMethodBody(int rva) |
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{ |
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throw new BadImageFormatException("This metadata file does not contain method bodies."); |
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} |
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public virtual SectionData GetSectionData(int rva) |
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{ |
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throw new BadImageFormatException("This metadata file does not support sections."); |
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} |
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public virtual int GetContainingSectionIndex(int rva) |
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{ |
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throw new BadImageFormatException("This metadata file does not support sections."); |
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} |
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public virtual ImmutableArray<SectionHeader> SectionHeaders => throw new BadImageFormatException("This metadata file does not support sections."); |
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/// <summary>
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/// Gets the CLI header or null if the image does not have one.
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/// </summary>
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public virtual CorHeader? CorHeader => null; |
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public IModuleReference WithOptions(TypeSystemOptions options) |
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{ |
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return new MetadataFileWithOptions(this, options); |
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} |
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private class MetadataFileWithOptions : IModuleReference |
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{ |
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readonly MetadataFile peFile; |
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readonly TypeSystemOptions options; |
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public MetadataFileWithOptions(MetadataFile peFile, TypeSystemOptions options) |
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{ |
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this.peFile = peFile; |
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this.options = options; |
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} |
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IModule IModuleReference.Resolve(ITypeResolveContext context) |
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{ |
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return new MetadataModule(context.Compilation, peFile, options); |
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} |
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} |
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} |
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/// <summary>
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/// Abstraction over PEMemoryBlock
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/// </summary>
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public readonly unsafe struct SectionData |
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{ |
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public byte* Pointer { get; } |
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public int Length { get; } |
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public SectionData(PEMemoryBlock block) |
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{ |
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Pointer = block.Pointer; |
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Length = block.Length; |
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} |
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public SectionData(byte* startPointer, int length) |
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{ |
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Pointer = startPointer; |
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Length = length; |
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} |
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public BlobReader GetReader() |
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{ |
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return new BlobReader(Pointer, Length); |
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} |
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internal BlobReader GetReader(int offset, int size) |
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{ |
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return new BlobReader(Pointer + offset, size); |
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} |
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} |
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public struct SectionHeader |
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{ |
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public string Name; |
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public uint VirtualSize; |
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public uint VirtualAddress; |
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public uint RawDataSize; |
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public uint RawDataPtr; |
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} |
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} |
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