mcs/class/dlr/Runtime/Microsoft.Scripting.Core/Compiler/SymbolDocumentGenerator.cs

   1 /* ****************************************************************************
   2  *
   3  * Copyright (c) Microsoft Corporation.
   4  *
   5  * This source code is subject to terms and conditions of the Apache License, Version 2.0. A
   6  * copy of the license can be found in the License.html file at the root of this distribution. If
   7  * you cannot locate the  Apache License, Version 2.0, please send an email to
   8  * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
   9  * by the terms of the Apache License, Version 2.0.
  10  *
  11  * You must not remove this notice, or any other, from this software.
  12  *
  13  *
  14  * ***************************************************************************/
  15 #if FEATURE_REFEMIT && FEATURE_PDBEMIT
  16
  17 #if !FEATURE_CORE_DLR
  18 using Microsoft.Scripting.Ast;
  19 using Microsoft.Scripting.Ast.Compiler;
  20 #else
  21 using System.Linq.Expressions;
  22 using System.Linq.Expressions.Compiler;
  23 #endif
  24
  25 using System.Collections.Generic;
  26 using System.Diagnostics;
  27 using System.Diagnostics.SymbolStore;
  28 using System.Reflection;
  29 using System.Reflection.Emit;
  30
  31 namespace System.Runtime.CompilerServices {
  32 #if !FEATURE_CORE_DLR || SILVERLIGHT
  33     using ILGenerator = OffsetTrackingILGenerator;
  34 #endif
  35
  36     /// <summary>
  37     /// Generator of PDB debugging information for expression trees.
  38     /// </summary>
  39     internal sealed class SymbolDocumentGenerator : DebugInfoGenerator {
  40         private Dictionary<SymbolDocumentInfo, ISymbolDocumentWriter> _symbolWriters;
  41
  42         private ISymbolDocumentWriter GetSymbolWriter(MethodBuilder method, SymbolDocumentInfo document) {
  43             ISymbolDocumentWriter result;
  44             if (_symbolWriters == null) {
  45                 _symbolWriters = new Dictionary<SymbolDocumentInfo, ISymbolDocumentWriter>();
  46             }
  47
  48             if (!_symbolWriters.TryGetValue(document, out result)) {
  49                 result = ((ModuleBuilder)method.Module).DefineDocument(document.FileName, document.Language, document.LanguageVendor, SymbolGuids.DocumentType_Text);
  50                 _symbolWriters.Add(document, result);
  51             }
  52
  53             return result;
  54         }
  55
  56         internal override void MarkSequencePoint(LambdaExpression method, MethodBase methodBase, ILGenerator ilg, DebugInfoExpression sequencePoint) {
  57             MethodBuilder builder = methodBase as MethodBuilder;
  58             if (builder != null) {
  59                 ilg.MarkSequencePoint(GetSymbolWriter(builder, sequencePoint.Document), sequencePoint.StartLine, sequencePoint.StartColumn, sequencePoint.EndLine, sequencePoint.EndColumn);
  60             }
  61         }
  62
  63         public override void MarkSequencePoint(LambdaExpression method, int ilOffset, DebugInfoExpression sequencePoint) {
  64             throw Error.PdbGeneratorNeedsExpressionCompiler();
  65         }
  66
  67         internal override void SetLocalName(LocalBuilder localBuilder, string name) {
  68             localBuilder.SetLocalSymInfo(name);
  69         }
  70     }
  71 }
  72 #endif