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[cdac] Start Loader contract and implement ISOSDacInterface::GetModul…
…eData in cDAC (dotnet#104257) - Start a `Loader` contract - currently contains what is needed for GetModuleData - Implement `ISOSDacInterface::GetModuleData` in cDAC - Store base address and is reflection emit bit on `Module` for easier diagnostics access
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| # Contract Loader | ||
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| This contract is for getting information about loaded modules and assemblies | ||
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| ## APIs of contract | ||
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| ``` csharp | ||
| readonly struct ModuleHandle | ||
| { | ||
| // Opaque handle - no public members | ||
| internal TargetPointer Address; | ||
| } | ||
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| [Flags] | ||
| enum ModuleFlags | ||
| { | ||
| EditAndContinue = 0x00000008, // Edit and Continue is enabled for this module | ||
| ReflectionEmit = 0x00000040, // Reflection.Emit was used to create this module | ||
| } | ||
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| record struct ModuleLookupTables( | ||
| TargetPointer FieldDefToDesc, | ||
| TargetPointer ManifestModuleReferences, | ||
| TargetPointer MemberRefToDesc, | ||
| TargetPointer MethodDefToDesc, | ||
| TargetPointer TypeDefToMethodTable, | ||
| TargetPointer TypeRefToMethodTable); | ||
| ``` | ||
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| ``` csharp | ||
| ModuleHandle GetModuleHandle(TargetPointer); | ||
| TargetPointer GetAssembly(ModuleHandle handle); | ||
| ModuleFlags GetFlags(ModuleHandle handle); | ||
| TargetPointer GetLoaderAllocator(ModuleHandle handle); | ||
| TargetPointer GetThunkHeap(ModuleHandle handle); | ||
| TargetPointer GetILBase(ModuleHandle handle); | ||
| TargetPointer GetMetadataAddress(ModuleHandle handle, out ulong size); | ||
| ModuleLookupTables GetLookupTables(ModuleHandle handle); | ||
| ``` | ||
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| ## Version 1 | ||
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| Data descriptors used: | ||
| - `Module` | ||
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| ``` csharp | ||
| ModuleHandle GetModuleHandle(TargetPointer modulePointer) | ||
| { | ||
| return new ModuleHandle(modulePointer); | ||
| } | ||
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| TargetPointer GetAssembly(ModuleHandle handle) | ||
| { | ||
| return target.ReadPointer(handle.Address + /* Module::Assrembly offset */); | ||
| } | ||
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| ModuleFlags GetFlags(ModuleHandle handle) | ||
| { | ||
| return target.Read<uint>(handle.Address + /* Module::Flags offset */); | ||
| } | ||
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| TargetPointer GetLoaderAllocator(ModuleHandle handle) | ||
| { | ||
| return target.ReadPointer(handle.Address + /* Module::LoaderAllocator offset */); | ||
| } | ||
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| TargetPointer GetThunkHeap(ModuleHandle handle) | ||
| { | ||
| return target.ReadPointer(handle.Address + /* Module::ThunkHeap offset */); | ||
| } | ||
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| TargetPointer GetILBase(ModuleHandle handle) | ||
| { | ||
| return target.ReadPointer(handle.Address + /* Module::Base offset */); | ||
| } | ||
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| TargetPointer GetMetadataAddress(ModuleHandle handle, out ulong size) | ||
| { | ||
| TargetPointer baseAddress = GetILBase(handle); | ||
| if (baseAddress == TargetPointer.Null) | ||
| { | ||
| size = 0; | ||
| return TargetPointer.Null; | ||
| } | ||
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| // Read CLR header per https://learn.microsoft.com/windows/win32/debug/pe-format | ||
| ulong clrHeaderRVA = ... | ||
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| // Read Metadata per ECMA-335 II.25.3.3 CLI Header | ||
| ulong metadataDirectoryAddress = baseAddress + clrHeaderRva + /* offset to Metadata */ | ||
| int rva = target.Read<int>(metadataDirectoryAddress); | ||
| size = target.Read<int>(metadataDirectoryAddress + sizeof(int)); | ||
| return baseAddress + rva; | ||
| } | ||
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| ModuleLookupTables GetLookupTables(ModuleHandle handle) | ||
| { | ||
| return new ModuleLookupTables( | ||
| FieldDefToDescMap: target.ReadPointer(handle.Address + /* Module::FieldDefToDescMap */), | ||
| ManifestModuleReferencesMap: target.ReadPointer(handle.Address + /* Module::ManifestModuleReferencesMap */), | ||
| MemberRefToDescMap: target.ReadPointer(handle.Address + /* Module::MemberRefToDescMap */), | ||
| MethodDefToDescMap: target.ReadPointer(handle.Address + /* Module::MethodDefToDescMap */), | ||
| TypeDefToMethodTableMap: target.ReadPointer(handle.Address + /* Module::TypeDefToMethodTableMap */), | ||
| TypeRefToMethodTableMap: target.ReadPointer(handle.Address + /* Module::TypeRefToMethodTableMap */)); | ||
| } | ||
| ``` |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| using System; | ||
| using System.Collections.Generic; | ||
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| namespace Microsoft.Diagnostics.DataContractReader.Contracts; | ||
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| internal readonly struct ModuleHandle | ||
| { | ||
| internal ModuleHandle(TargetPointer address) | ||
| { | ||
| Address = address; | ||
| } | ||
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| internal TargetPointer Address { get; } | ||
| } | ||
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| [Flags] | ||
| internal enum ModuleFlags | ||
| { | ||
| EditAndContinue = 0x00000008, // Edit and Continue is enabled for this module | ||
| ReflectionEmit = 0x00000040, // Reflection.Emit was used to create this module | ||
| } | ||
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| internal record struct ModuleLookupTables( | ||
| TargetPointer FieldDefToDesc, | ||
| TargetPointer ManifestModuleReferences, | ||
| TargetPointer MemberRefToDesc, | ||
| TargetPointer MethodDefToDesc, | ||
| TargetPointer TypeDefToMethodTable, | ||
| TargetPointer TypeRefToMethodTable); | ||
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| internal interface ILoader : IContract | ||
| { | ||
| static string IContract.Name => nameof(Loader); | ||
| static IContract IContract.Create(Target target, int version) | ||
| { | ||
| return version switch | ||
| { | ||
| 1 => new Loader_1(target), | ||
| _ => default(Loader), | ||
| }; | ||
| } | ||
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| public virtual ModuleHandle GetModuleHandle(TargetPointer modulePointer) => throw new NotImplementedException(); | ||
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| public virtual TargetPointer GetAssembly(ModuleHandle handle) => throw new NotImplementedException(); | ||
| public virtual ModuleFlags GetFlags(ModuleHandle handle) => throw new NotImplementedException(); | ||
| public virtual TargetPointer GetLoaderAllocator(ModuleHandle handle) => throw new NotImplementedException(); | ||
| public virtual TargetPointer GetThunkHeap(ModuleHandle handle) => throw new NotImplementedException(); | ||
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| public virtual TargetPointer GetILBase(ModuleHandle handle) => throw new NotImplementedException(); | ||
| public virtual TargetPointer GetMetadataAddress(ModuleHandle handle, out ulong size) => throw new NotImplementedException(); | ||
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| public virtual ModuleLookupTables GetLookupTables(ModuleHandle handle) => throw new NotImplementedException(); | ||
| } | ||
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| internal readonly struct Loader : ILoader | ||
| { | ||
| // Everything throws NotImplementedException | ||
| } |
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