[WIP] Build source map for scripts

libs/UIX.DecompXml/DecompileContext.cs

@@ -2,6 +2,7 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.Iris.Asm;
 using Microsoft.Iris.Asm.Models;
+using Microsoft.Iris.Debug.Symbols;
 using Microsoft.Iris.Markup;
 using System;
 using System.Collections.Generic;
@@ -58,6 +59,12 @@ internal class DecompileContext
 
         _scriptMap = [];
 
+        DebugSymbols = new()
+        {
+            CompiledFileName = _loadResult.ErrorContextUri,
+            ScriptSymbols = [],
+        };
+
         _instructions = ObjectSection.Decode(_loadResult.ObjectSection)
             .OfType<Instruction>()
             .ToArray();
@@ -71,6 +78,8 @@ internal class DecompileContext
 
     public MarkupImportTables ImportTables => _loadResult.ImportTables;
 
+    public FileDebugSymbols DebugSymbols { get; }
+
     [MemberNotNullWhen(true, nameof(_dataTableLoadResult))]
     private bool UseSharedDataTable => _dataTableLoadResult is not null;
 

libs/UIX.DecompXml/Decompiler.Script.cs

@@ -3,6 +3,7 @@ using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Extensions;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.Iris.Asm.Models;
+using Microsoft.Iris.Debug.Symbols;
 using Microsoft.Iris.DecompXml.Mock;
 using Microsoft.Iris.Markup;
 using Microsoft.Iris.Markup.UIX;
@@ -23,7 +24,7 @@ partial class Decompiler
     private SyntaxTree DecompileScript(uint startOffset, MarkupTypeSchema export)
     {
         var statements = DecompileMethod(startOffset, export);
-        return CreateTree(statements);
+        return CreateTree(statements, startOffset);
     }
 
     public List<StatementSyntax> DecompileMethod(uint startOffset, MarkupTypeSchema export)
@@ -501,7 +502,7 @@ partial class Decompiler
                             if (statements is null)
                                 break;
 
-                            scriptContent = CreateTree(statements);
+                            scriptContent = CreateTree(statements, scriptOffset);
                             _context.SetScriptContent(initType, scriptOffset, scriptContent);
                         }
 
@@ -595,26 +596,29 @@ partial class Decompiler
         return newNode;
     }
 
-    public static SyntaxTree CreateTree(IEnumerable<StatementSyntax> statements)
+    public static SyntaxTree CreateTree(IEnumerable<StatementSyntax> statements, uint? startOffset = null)
     {
-        return SyntaxTree(
+        var root = CompilationUnit()
-            CompilationUnit().WithMembers(
+            .WithMembers(
                 [.. statements.Select(GlobalStatement)]
-            )
             );
+
+        if (startOffset is not null)
+            root = root.WithOffset(startOffset.Value);
+
+        return SyntaxTree(root);
     }
 
-    public static string FormatInlineExpression(ExpressionSyntax expr, CancellationToken token = default) => '{' + FormatSyntaxNode(expr, token) + '}';
+    public string FormatInlineExpression(ExpressionSyntax expr, CancellationToken token = default) => '{' + FormatSyntaxNode(expr, token) + '}';
 
-    public static string FormatScript(SyntaxTree tree, CancellationToken token = default) => FormatSyntaxNode(tree.GetRoot(token), token);
+    public string FormatScript(SyntaxTree tree, CancellationToken token = default) => FormatSyntaxNode(tree.GetRoot(token), token);
 
-    public static string FormatScript(IEnumerable<StatementSyntax> statements, CancellationToken token = default) => FormatScript(CreateTree(statements), token);
+    public string FormatSyntaxNode(SyntaxNode root, CancellationToken cancellationToken = default)
-
-    public static string FormatSyntaxNode(SyntaxNode root, CancellationToken cancellationToken = default)
     {
-        Debug.Symbols.ScriptDebugSymbols symbols = new()
+        uint? scriptOffset = null;
+        ScriptDebugSymbols debugSymbols = new()
         {
-            LineNumberMap = []
+            SourceMap = []
         };
 
         root = root.NormalizeWhitespace();
@@ -626,20 +630,22 @@ partial class Decompiler
 
             var location = node.GetLocation();
 
-            symbols.LineNumberMap[offset] = new(location.SourceSpan.Start, location.SourceSpan.End);
+            debugSymbols.SourceMap[offset] = new(location.SourceSpan.Start, location.SourceSpan.End);
+
+            if (scriptOffset is null && node is CompilationUnitSyntax)
+                scriptOffset = offset;
         }
 
         var sourceText = root
             .SyntaxTree
             .GetText(cancellationToken);
 
-        foreach (var mapping in symbols.LineNumberMap.OrderBy(x => x.Key))
+        debugSymbols.SourceCode = sourceText.ToString();
-        {
-            var subtext = sourceText.GetSubText(CodeAnalysis.Text.TextSpan.FromBounds(mapping.Value.Start, mapping.Value.End));
-            System.Diagnostics.Debug.WriteLine($"0x{mapping.Key:X}: `{subtext}`");
-        }
 
-        return sourceText.ToString();
+        if (scriptOffset is not null)
+            _context.DebugSymbols.ScriptSymbols[scriptOffset.Value] = debugSymbols;
+
+        return debugSymbols.SourceCode;
     }
 
     private bool TryDecompileExpression(Instruction instruction, Stack<object> stack, ControlFlowAnalyzer cfa = null)

libs/UIX.DecompXml/Decompiler.cs

@@ -1,6 +1,7 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.Iris.Asm;
+using Microsoft.Iris.Debug.Symbols;
 using Microsoft.Iris.DecompXml.Mock;
 using Microsoft.Iris.Markup;
 using System;
@@ -87,7 +88,7 @@ public partial class Decompiler
             {
                 var statements = DecompileMethod(offset, export);
                 AddMethodAttribute(statements, "FinalEvaluate");
-                _context.SetScriptContent(export, offset, CreateTree(statements));
+                _context.SetScriptContent(export, offset, CreateTree(statements, offset));
             }
 
             foreach (var offset in export.RefreshGroupOffsets ?? [])
@@ -161,6 +162,8 @@ public partial class Decompiler
         return sb.ToString();
     }
 
+    public FileDebugSymbols DebugSymbols => _context.DebugSymbols;
+
     private Stack<object> AnalyzeMethodForInit(uint startOffset, XElement elemToInit, MarkupTypeSchema initType, string methodName = "")
     {
         var methodBody = _context.GetMethodBody(startOffset).ToArray();
@@ -283,7 +286,10 @@ public partial class Decompiler
 
                         // Ensure stack is in valid state
                         var isPeek = instruction.OpCode is OpCode.JumpIfFalsePeek or OpCode.JumpIfTruePeek or OpCode.JumpIfNullPeek;
-                        var rawJumpCondition = IrisExpression.ToSyntax(isPeek ? stack.Peek() : stack.Pop(), _context);
+                        if (isPeek)
+                            stack.Peek();
+                        else
+                            stack.Pop();
                         break;
 
                     case OpCode.ConstructObjectParam: