mcs/symbolwriter.cs

   1 //
   2 // symbolwriter.cs: The symbol writer
   3 //
   4 // Author:
   5 //   Martin Baulig (martin@ximian.com)
   6 //
   7 // (C) 2003 Ximian, Inc.
   8 //
   9
  10 using System;
  11 using System.Collections;
  12 using System.Reflection;
  13 using System.Reflection.Emit;
  14
  15 using Mono.CompilerServices.SymbolWriter;
  16
  17 namespace Mono.CSharp {
  18         public class SymbolWriter : MonoSymbolWriter {
  19                 delegate int GetILOffsetFunc (ILGenerator ig);
  20                 delegate Guid GetGuidFunc (ModuleBuilder mb);
  21
  22                 GetILOffsetFunc get_il_offset_func;
  23                 GetGuidFunc get_guid_func;
  24
  25                 ModuleBuilder module_builder;
  26
  27                 protected SymbolWriter (ModuleBuilder module_builder, string filename)
  28                         : base (filename)
  29                 {
  30                         this.module_builder = module_builder;
  31                 }
  32
  33                 bool Initialize ()
  34                 {
  35                         MethodInfo mi = typeof (ILGenerator).GetMethod (
  36                                 "Mono_GetCurrentOffset",
  37                                 BindingFlags.Static | BindingFlags.NonPublic);
  38                         if (mi == null)
  39                                 return false;
  40
  41                         get_il_offset_func = (GetILOffsetFunc) System.Delegate.CreateDelegate (
  42                                 typeof (GetILOffsetFunc), mi);
  43
  44                         mi = typeof (ModuleBuilder).GetMethod (
  45                                 "Mono_GetGuid",
  46                                 BindingFlags.Static | BindingFlags.NonPublic);
  47                         if (mi == null)
  48                                 return false;
  49
  50                         get_guid_func = (GetGuidFunc) System.Delegate.CreateDelegate (
  51                                 typeof (GetGuidFunc), mi);
  52
  53                         Location.DefineSymbolDocuments (this);
  54
  55                         return true;
  56                 }
  57
  58                 public void DefineLocalVariable (string name, LocalBuilder builder)
  59                 {
  60                         SignatureHelper sighelper = SignatureHelper.GetLocalVarSigHelper (
  61                                 module_builder);
  62                         sighelper.AddArgument (builder.LocalType);
  63                         byte[] signature = sighelper.GetSignature ();
  64
  65                         int index = MonoDebuggerSupport.GetLocalIndex (builder);
  66
  67                         DefineLocalVariable (index, name, signature);
  68                 }
  69
  70                 public int OpenScope (ILGenerator ig)
  71                 {
  72                         int offset = get_il_offset_func (ig);
  73                         return OpenScope (offset);
  74                 }
  75
  76                 public void CloseScope (ILGenerator ig)
  77                 {
  78                         int offset = get_il_offset_func (ig);
  79                         CloseScope (offset);
  80                 }
  81
  82                 public void MarkSequencePoint (ILGenerator ig, int row, int column)
  83                 {
  84                         int offset = get_il_offset_func (ig);
  85                         MarkSequencePoint (offset, row, column);
  86                 }
  87
  88                 public void WriteSymbolFile ()
  89                 {
  90                         Guid guid = get_guid_func (module_builder);
  91                         WriteSymbolFile (guid);
  92                 }
  93
  94                 public static SymbolWriter GetSymbolWriter (ModuleBuilder module,
  95                                                             string filename)
  96                 {
  97                         SymbolWriter writer = new SymbolWriter (module, filename);
  98                         if (!writer.Initialize ())
  99                                 return null;
 100
 101                         return writer;
 102                 }
 103         }
 104 }