Add PDB support for PersistedAssemblyBuilder (#100706)

* Initial PDB API shape and sequence point implementation

* Finish PDB implementation and testing

* Fix bug in multi doc sequence point

* Validate null name for SetLocalSymInfo, do not add locals that has no name to the locals table

* Throw on parent virtual methods, remove unnecessary throw

* Apply suggestions from code review

Co-authored-by: Aaron Robinson <arobins@microsoft.com>

* Apply feedback, fix issue found in sequence point PreviousNonHidden.StatrtLine/StartColumn

---------

Co-authored-by: Aaron Robinson <arobins@microsoft.com>

src/libraries/System.Private.CoreLib/src/Resources/Strings.resx

@@ -4316,4 +4316,7 @@
   <data name="WasmThreads_BlockingWaitNotSupportedOnJSInterop" xml:space="preserve">
     <value>Blocking wait is not supported on the JS interop threads.</value>
   </data>
+  <data name="NotSupported_EmitDebugInfo" xml:space="preserve">
+    <value>Emitting debug info is not supported for this member.</value>
+  </data>
 </root>

src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/ILGenerator.cs

@@ -3,6 +3,7 @@
 
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
+using System.Diagnostics.SymbolStore;
 
 namespace System.Reflection.Emit
 {
@@ -200,6 +201,66 @@ public virtual LocalBuilder DeclareLocal(Type localType)
         [CLSCompliant(false)]
         public void Emit(OpCode opcode, sbyte arg) => Emit(opcode, (byte)arg);
 
+        /// <summary>
+        /// Marks a sequence point in the Microsoft intermediate language (MSIL) stream.
+        /// </summary>
+        /// <param name="document">The document for which the sequence point is being defined.</param>
+        /// <param name="startLine">The line where the sequence point begins.</param>
+        /// <param name="startColumn">The column in the line where the sequence point begins.</param>
+        /// <param name="endLine">The line where the sequence point ends.</param>
+        /// <param name="endColumn">The column in the line where the sequence point ends.</param>
+        /// <exception cref="ArgumentNullException"><paramref name="document"/> is <see langword="null"/>.</exception>
+        /// <exception cref="ArgumentException"><paramref name="document"/> is not valid.</exception>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// <paramref name="startLine"/> is not within range [0, 0x20000000) or
+        /// <paramref name="endLine"/> is not within range [0, 0x20000000) or lower than <paramref name="startLine"/> or
+        /// <paramref name="startColumn"/> is not within range [0, 0x10000) or
+        /// <paramref name="endLine"/> is not within range [0, 0x10000) or
+        /// <paramref name="startLine"/> equal to <paramref name="endLine"/> and it is not hidden sequence point and <paramref name="endLine"/> lower than or equal to <paramref name="startLine"/>.
+        /// </exception>
+        /// <exception cref="NotSupportedException">Emitting debug info is not supported.</exception>"
+        public void MarkSequencePoint(ISymbolDocumentWriter document, int startLine, int startColumn, int endLine, int endColumn)
+        {
+            ArgumentNullException.ThrowIfNull(document);
+
+            if (startLine < 0 || startLine >= 0x20000000)
+            {
+                throw new ArgumentOutOfRangeException(nameof(startLine));
+            }
+
+            if (endLine < 0 || endLine >= 0x20000000 || startLine > endLine)
+            {
+                throw new ArgumentOutOfRangeException(nameof(endLine));
+            }
+
+            if (startColumn < 0 || startColumn >= 0x10000)
+            {
+                throw new ArgumentOutOfRangeException(nameof(startColumn));
+            }
+
+            if (endColumn < 0 || endColumn >= 0x10000 ||
+                (startLine == endLine && startLine != 0xfeefee && startColumn >= endColumn))
+            {
+                throw new ArgumentOutOfRangeException(nameof(endColumn));
+            }
+
+            MarkSequencePointCore(document, startLine, startColumn, endLine, endColumn);
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, marks a sequence point in the Microsoft intermediate language (MSIL) stream.
+        /// </summary>
+        /// <param name="document">The document for which the sequence point is being defined.</param>
+        /// <param name="startLine">The line where the sequence point begins.</param>
+        /// <param name="startColumn">The column in the line where the sequence point begins.</param>
+        /// <param name="endLine">The line where the sequence point ends.</param>
+        /// <param name="endColumn">The column in the line where the sequence point ends.</param>
+        /// <exception cref="ArgumentException"><paramref name="document"/> is not valid.</exception>
+        /// <exception cref="NotSupportedException">Emitting debug info is not supported.</exception>"
+        /// <remarks>The parameters validated in the caller: <see cref="MarkSequencePoint"/>.</remarks>
+        protected virtual void MarkSequencePointCore(ISymbolDocumentWriter document, int startLine, int startColumn, int endLine, int endColumn) =>
+            throw new NotSupportedException(SR.NotSupported_EmitDebugInfo);
+
         #endregion
 
         #endregion

src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/LocalBuilder.cs

@@ -12,5 +12,27 @@ public abstract class LocalBuilder : LocalVariableInfo
         /// This constructor is invoked by derived classes.
         /// </remarks>
         protected LocalBuilder() { }
+
+        /// <summary>
+        /// Sets the name of this local variable.
+        /// </summary>
+        /// <param name="name">The name of the local variable</param>
+        /// <exception cref="ArgumentNullException">The <paramref name="name"/> is null.</exception>
+        /// <exception cref="InvalidOperationException">The containing type has been created with CreateType() or
+        /// containing type doesn't support symbol writing.</exception>"
+        public void SetLocalSymInfo(string name)
+        {
+            ArgumentNullException.ThrowIfNull(name);
+
+            SetLocalSymInfoCore(name);
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, sets the name of this local variable.
+        /// </summary>
+        /// <param name="name">The name of the local variable.</param>
+        /// <exception cref="NotSupportedException">Emitting debug info is not supported.</exception>"
+        /// <exception cref="InvalidOperationException">The containing type has been created with CreateType().</exception>"
+        protected virtual void SetLocalSymInfoCore(string name) => throw new NotSupportedException(SR.NotSupported_EmitDebugInfo);
     }
 }

src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/ModuleBuilder.cs

@@ -1,7 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.ComponentModel;
 using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.SymbolStore;
 using System.Runtime.InteropServices;
 
 namespace System.Reflection.Emit
@@ -24,6 +26,45 @@ public EnumBuilder DefineEnum(string name, TypeAttributes visibility, Type under
             return DefineEnumCore(name, visibility, underlyingType);
         }
 
+        /// <summary>
+        /// Defines a document for source.
+        /// </summary>
+        /// <param name="url">The URL for the document.</param>
+        /// <param name="language">The GUID that identifies the document language. This can be Empty</param>
+        /// <param name="languageVendor">The GUID that identifies the document language vendor. This is not used.</param>
+        /// <param name="documentType">The GUID that identifies the document language vendor. This is not used.</param>
+        /// <returns>The defined document.</returns>
+        /// <exception cref="ArgumentNullException"><paramref name="url"/> is <see langword="null"/>.</exception>
+        /// <exception cref="InvalidOperationException">This method is called on a dynamic module that is not a persisted module.</exception>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public ISymbolDocumentWriter DefineDocument(string url, Guid language, Guid languageVendor, Guid documentType) =>
+            DefineDocument(url, language);
+
+        /// <summary>
+        /// Defines a document for source.
+        /// </summary>
+        /// <param name="url">The URL for the document.</param>
+        /// <param name="language">The GUID that identifies the document language. This is optional</param>
+        /// <returns>The defined document.</returns>
+        /// <exception cref="ArgumentNullException"><paramref name="url"/> is <see langword="null"/>.</exception>
+        /// <exception cref="InvalidOperationException">This method is called on a dynamic module that is not a persisted module.</exception>
+        public ISymbolDocumentWriter DefineDocument(string url, Guid language = default)
+        {
+            ArgumentException.ThrowIfNullOrEmpty(url);
+
+            return DefineDocumentCore(url, language);
+        }
+
+        /// <summary>
+        /// When override in a derived class, defines a document for source.
+        /// </summary>
+        /// <param name="url">The URL for the document.</param>
+        /// <param name="language">The GUID that identifies the document language. This is optional</param>
+        /// <returns>The defined document.</returns>
+        /// <exception cref="InvalidOperationException">This method is called on a dynamic module that is not a debug module.</exception>
+        protected virtual ISymbolDocumentWriter DefineDocumentCore(string url, Guid language = default) =>
+            throw new InvalidOperationException(SR.InvalidOperation_NotADebugModule);
+
         protected abstract EnumBuilder DefineEnumCore(string name, TypeAttributes visibility, Type underlyingType);
 
         public MethodBuilder DefineGlobalMethod(string name, MethodAttributes attributes, Type? returnType, Type[]? parameterTypes)

src/libraries/System.Reflection.Emit.ILGeneration/ref/System.Reflection.Emit.ILGeneration.cs

@@ -54,6 +54,8 @@ public virtual void EmitWriteLine(string value) { }
         public abstract void EndExceptionBlock();
         public abstract void EndScope();
         public abstract void MarkLabel(System.Reflection.Emit.Label loc);
+        public void MarkSequencePoint(System.Diagnostics.SymbolStore.ISymbolDocumentWriter document, int startLine, int startColumn, int endLine, int endColumn) { throw null; }
+        protected virtual void MarkSequencePointCore(System.Diagnostics.SymbolStore.ISymbolDocumentWriter document, int startLine, int startColumn, int endLine, int endColumn) { throw null; }
         public virtual void ThrowException([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] System.Type excType) { }
         public abstract void UsingNamespace(string usingNamespace);
     }
@@ -73,6 +75,8 @@ protected LocalBuilder() { }
         public override bool IsPinned { get { throw null; } }
         public override int LocalIndex { get { throw null; } }
         public override System.Type LocalType { get { throw null; } }
+        public void SetLocalSymInfo(string name) { throw null; }
+        protected virtual void SetLocalSymInfoCore(string name) { throw null; }
     }
     public abstract partial class ParameterBuilder
     {

src/libraries/System.Reflection.Emit.ILGeneration/ref/System.Reflection.Emit.ILGeneration.csproj

@@ -9,5 +9,6 @@
     <ProjectReference Include="..\..\System.Runtime\ref\System.Runtime.csproj" />
     <ProjectReference Include="..\..\System.Runtime.InteropServices\ref\System.Runtime.InteropServices.csproj" />
     <ProjectReference Include="..\..\System.Reflection.Primitives\ref\System.Reflection.Primitives.csproj" />
+    <ProjectReference Include="..\..\System.Diagnostics.StackTrace\ref\System.Diagnostics.StackTrace.csproj" />
   </ItemGroup>
 </Project>

src/libraries/System.Reflection.Emit/ref/System.Reflection.Emit.cs

@@ -398,6 +398,10 @@ protected ModuleBuilder() { }
         public override string ScopeName { get { throw null; } }
         public void CreateGlobalFunctions() { }
         protected abstract void CreateGlobalFunctionsCore();
+        [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+        public System.Diagnostics.SymbolStore.ISymbolDocumentWriter DefineDocument(string url, Guid language, Guid languageVendor, Guid documentType) { throw null; }
+        public System.Diagnostics.SymbolStore.ISymbolDocumentWriter DefineDocument(string url, System.Guid language = default) { throw null; }
+        protected virtual System.Diagnostics.SymbolStore.ISymbolDocumentWriter DefineDocumentCore(string url, System.Guid language = default) { throw null; }
         public System.Reflection.Emit.EnumBuilder DefineEnum(string name, System.Reflection.TypeAttributes visibility, System.Type underlyingType) { throw null; }
         protected abstract System.Reflection.Emit.EnumBuilder DefineEnumCore(string name, System.Reflection.TypeAttributes visibility, System.Type underlyingType);
         public System.Reflection.Emit.MethodBuilder DefineGlobalMethod(string name, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? parameterTypes) { throw null; }
@@ -479,9 +483,11 @@ public PersistedAssemblyBuilder(System.Reflection.AssemblyName name, System.Refl
         public override System.Reflection.Module ManifestModule { get { throw null; } }
         [System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Defining a dynamic assembly requires dynamic code.")]
         protected override System.Reflection.Emit.ModuleBuilder DefineDynamicModuleCore(string name) { throw null; }
-        protected override System.Reflection.Emit.ModuleBuilder? GetDynamicModuleCore(string name) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public System.Reflection.Metadata.Ecma335.MetadataBuilder GenerateMetadata(out System.Reflection.Metadata.BlobBuilder ilStream, out System.Reflection.Metadata.BlobBuilder mappedFieldData) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public System.Reflection.Metadata.Ecma335.MetadataBuilder GenerateMetadata(out System.Reflection.Metadata.BlobBuilder ilStream, out System.Reflection.Metadata.BlobBuilder mappedFieldData, out System.Reflection.Metadata.Ecma335.MetadataBuilder pdbBuilder) { throw null; }
+        protected override System.Reflection.Emit.ModuleBuilder? GetDynamicModuleCore(string name) { throw null; }
         public override System.Reflection.AssemblyName GetName(bool copiedName) { throw null; }
         public void Save(string assemblyFileName) { throw null; }
         public void Save(System.IO.Stream stream) { throw null; }

src/libraries/System.Reflection.Emit/ref/System.Reflection.Emit.csproj

@@ -11,5 +11,6 @@
     <ProjectReference Include="..\..\System.Reflection.Primitives\ref\System.Reflection.Primitives.csproj" />
     <ProjectReference Include="..\..\System.Reflection.Emit.ILGeneration\ref\System.Reflection.Emit.ILGeneration.csproj" />
     <ProjectReference Include="..\..\System.Reflection.Metadata\ref\System.Reflection.Metadata.csproj" />
+    <ProjectReference Include="..\..\System.Diagnostics.StackTrace\ref\System.Diagnostics.StackTrace.csproj" />
   </ItemGroup>
 </Project>

src/libraries/System.Reflection.Emit/src/Resources/Strings.resx

@@ -297,4 +297,10 @@
   <data name="NotSupported_SymbolMethod" xml:space="preserve">
     <value>Not supported in an array method of a type definition that is not complete.</value>
   </data>
+  <data name="InvalidOperation_InvalidDocument" xml:space="preserve">
+    <value>Invalid source document.</value>
+  </data>
+  <data name="InvalidOperation_UnmatchingSymScope" xml:space="preserve">
+    <value>Unmatching symbol scope.</value>
+  </data>
 </root>

src/libraries/System.Reflection.Emit/src/System.Reflection.Emit.csproj

@@ -23,6 +23,8 @@
     <Compile Include="System\Reflection\Emit\MethodBuilderImpl.cs" />
     <Compile Include="System\Reflection\Emit\ModuleBuilderImpl.cs" />
     <Compile Include="System\Reflection\Emit\ParameterBuilderImpl.cs" />
+    <Compile Include="System\Reflection\Emit\Pdb\SequencePoint.cs" />
+    <Compile Include="System\Reflection\Emit\Pdb\SymbolDocumentWriter.cs" />
     <Compile Include="System\Reflection\Emit\PersistedAssemblyBuilder.cs" />
     <Compile Include="System\Reflection\Emit\PropertyBuilderImpl.cs" />
     <Compile Include="System\Reflection\Emit\PseudoCustomAttributesData.cs" />