source: branches/PersistentDataStructures/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Symbols/Mono.Cecil.Mdb/Mono.CompilerServices.SymbolWriter/MonoSymbolWriter.cs @ 17397

//
// Mono.CSharp.Debugger/MonoSymbolWriter.cs
//
// Author:
//   Martin Baulig (martin@ximian.com)
//
// This is the default implementation of the System.Diagnostics.SymbolStore.ISymbolWriter
// interface.
//
// (C) 2002 Ximian, Inc.  http://www.ximian.com
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.Runtime.CompilerServices;
using System.Collections.Generic;
using System.IO;

namespace Mono.CompilerServices.SymbolWriter
{
  public class MonoSymbolWriter
  {
    List<SourceMethodBuilder> methods;
    List<SourceFileEntry> sources;
    List<CompileUnitEntry> comp_units;
    protected readonly MonoSymbolFile file;
    string filename;

    private SourceMethodBuilder current_method;
#if NET_2_1
    System.Collections.Stack current_method_stack = new System.Collections.Stack ();
#else
    Stack<SourceMethodBuilder> current_method_stack = new Stack<SourceMethodBuilder> ();
#endif

    public MonoSymbolWriter (string filename)
    {
      this.methods = new List<SourceMethodBuilder> ();
      this.sources = new List<SourceFileEntry> ();
      this.comp_units = new List<CompileUnitEntry> ();
      this.file = new MonoSymbolFile ();

      this.filename = filename + ".mdb";
    }

    public MonoSymbolFile SymbolFile {
      get { return file; }
    }

    public void CloseNamespace ()
    { }

    public void DefineLocalVariable (int index, string name)
    {
      if (current_method == null)
        return;

      current_method.AddLocal (index, name);
    }

    public void DefineCapturedLocal (int scope_id, string name, string captured_name)
    {
      file.DefineCapturedVariable (scope_id, name, captured_name,
                 CapturedVariable.CapturedKind.Local);
    }

    public void DefineCapturedParameter (int scope_id, string name, string captured_name)
    {
      file.DefineCapturedVariable (scope_id, name, captured_name,
                 CapturedVariable.CapturedKind.Parameter);
    }

    public void DefineCapturedThis (int scope_id, string captured_name)
    {
      file.DefineCapturedVariable (scope_id, "this", captured_name,
                 CapturedVariable.CapturedKind.This);
    }

    public void DefineCapturedScope (int scope_id, int id, string captured_name)
    {
      file.DefineCapturedScope (scope_id, id, captured_name);
    }

    public void DefineScopeVariable (int scope, int index)
    {
      if (current_method == null)
        return;

      current_method.AddScopeVariable (scope, index);
    }

    public void MarkSequencePoint (int offset, SourceFileEntry file, int line, int column,
                 bool is_hidden)
    {
      if (current_method == null)
        return;

      current_method.MarkSequencePoint (offset, file, line, column, is_hidden);
    }

    public SourceMethodBuilder OpenMethod (ICompileUnit file, int ns_id, IMethodDef method)
    {
      SourceMethodBuilder builder = new SourceMethodBuilder (file, ns_id, method);
      current_method_stack.Push (current_method);
      current_method = builder;
      methods.Add (current_method);
      return builder;
    }

    public void CloseMethod ()
    {
      current_method = (SourceMethodBuilder) current_method_stack.Pop ();
    }

    public SourceFileEntry DefineDocument (string url)
    {
      SourceFileEntry entry = new SourceFileEntry (file, url);
      sources.Add (entry);
      return entry;
    }

    public SourceFileEntry DefineDocument (string url, byte[] guid, byte[] checksum)
    {
      SourceFileEntry entry = new SourceFileEntry (file, url, guid, checksum);
      sources.Add (entry);
      return entry;
    }

    public CompileUnitEntry DefineCompilationUnit (SourceFileEntry source)
    {
      CompileUnitEntry entry = new CompileUnitEntry (file, source);
      comp_units.Add (entry);
      return entry;
    }

    public int DefineNamespace (string name, CompileUnitEntry unit,
              string[] using_clauses, int parent)
    {
      if ((unit == null) || (using_clauses == null))
        throw new NullReferenceException ();

      return unit.DefineNamespace (name, using_clauses, parent);
    }

    public int OpenScope (int start_offset)
    {
      if (current_method == null)
        return 0;

      current_method.StartBlock (CodeBlockEntry.Type.Lexical, start_offset);
      return 0;
    }

    public void CloseScope (int end_offset)
    {
      if (current_method == null)
        return;

      current_method.EndBlock (end_offset);
    }

    public void OpenCompilerGeneratedBlock (int start_offset)
    {
      if (current_method == null)
        return;

      current_method.StartBlock (CodeBlockEntry.Type.CompilerGenerated,
               start_offset);
    }

    public void CloseCompilerGeneratedBlock (int end_offset)
    {
      if (current_method == null)
        return;

      current_method.EndBlock (end_offset);
    }

    public void StartIteratorBody (int start_offset)
    {
      current_method.StartBlock (CodeBlockEntry.Type.IteratorBody,
               start_offset);
    }

    public void EndIteratorBody (int end_offset)
    {
      current_method.EndBlock (end_offset);
    }

    public void StartIteratorDispatcher (int start_offset)
    {
      current_method.StartBlock (CodeBlockEntry.Type.IteratorDispatcher,
               start_offset);
    }

    public void EndIteratorDispatcher (int end_offset)
    {
      current_method.EndBlock (end_offset);
    }

    public void DefineAnonymousScope (int id)
    {
      file.DefineAnonymousScope (id);
    }

    public void WriteSymbolFile (Guid guid)
    {
      foreach (SourceMethodBuilder method in methods)
        method.DefineMethod (file);

      try {
        // We mmap the file, so unlink the previous version since it may be in use
        File.Delete (filename);
      } catch {
        // We can safely ignore
      }
      using (FileStream fs = new FileStream (filename, FileMode.Create, FileAccess.Write)) {
        file.CreateSymbolFile (guid, fs);
      }
    }
  }

  public class SourceMethodBuilder
  {
    List<LocalVariableEntry> _locals;
    List<CodeBlockEntry> _blocks;
    List<ScopeVariable> _scope_vars;
#if NET_2_1
    System.Collections.Stack _block_stack;
#else
    Stack<CodeBlockEntry> _block_stack;
#endif
    string _real_name;
    IMethodDef _method;
    ICompileUnit _comp_unit;
//    MethodEntry.Flags _method_flags;
    int _ns_id;

    public SourceMethodBuilder (ICompileUnit comp_unit, int ns_id, IMethodDef method)
    {
      this._comp_unit = comp_unit;
      this._method = method;
      this._ns_id = ns_id;

      method_lines = new LineNumberEntry [32];
    }

    private LineNumberEntry [] method_lines;
    private int method_lines_pos = 0;

    public void MarkSequencePoint (int offset, SourceFileEntry file, int line, int column,
                 bool is_hidden)
    {
      if (method_lines_pos == method_lines.Length) {
        LineNumberEntry [] tmp = method_lines;
        method_lines = new LineNumberEntry [method_lines.Length * 2];
        Array.Copy (tmp, method_lines, method_lines_pos);
      }

      int file_idx = file != null ? file.Index : 0;
      method_lines [method_lines_pos++] = new LineNumberEntry (
        file_idx, line, offset, is_hidden);
    }

    public void StartBlock (CodeBlockEntry.Type type, int start_offset)
    {
      if (_block_stack == null) {
#if NET_2_1
        _block_stack = new System.Collections.Stack ();
#else
        _block_stack = new Stack<CodeBlockEntry> ();
#endif
      }

      if (_blocks == null)
        _blocks = new List<CodeBlockEntry> ();

      int parent = CurrentBlock != null ? CurrentBlock.Index : -1;

      CodeBlockEntry block = new CodeBlockEntry (
        _blocks.Count + 1, parent, type, start_offset);

      _block_stack.Push (block);
      _blocks.Add (block);
    }

    public void EndBlock (int end_offset)
    {
      CodeBlockEntry block = (CodeBlockEntry) _block_stack.Pop ();
      block.Close (end_offset);
    }

    public CodeBlockEntry[] Blocks {
      get {
        if (_blocks == null)
          return new CodeBlockEntry [0];

        CodeBlockEntry[] retval = new CodeBlockEntry [_blocks.Count];
        _blocks.CopyTo (retval, 0);
        return retval;
      }
    }

    public CodeBlockEntry CurrentBlock {
      get {
        if ((_block_stack != null) && (_block_stack.Count > 0))
          return (CodeBlockEntry) _block_stack.Peek ();
        else
          return null;
      }
    }

    public LocalVariableEntry[] Locals {
      get {
        if (_locals == null)
          return new LocalVariableEntry [0];
        else {
          LocalVariableEntry[] retval =
            new LocalVariableEntry [_locals.Count];
          _locals.CopyTo (retval, 0);
          return retval;
        }
      }
    }

    public void AddLocal (int index, string name)
    {
      if (_locals == null)
        _locals = new List<LocalVariableEntry> ();
      int block_idx = CurrentBlock != null ? CurrentBlock.Index : 0;
      _locals.Add (new LocalVariableEntry (index, name, block_idx));
    }

    public ScopeVariable[] ScopeVariables {
      get {
        if (_scope_vars == null)
          return new ScopeVariable [0];

        ScopeVariable[] retval = new ScopeVariable [_scope_vars.Count];
        _scope_vars.CopyTo (retval);
        return retval;
      }
    }

    public void AddScopeVariable (int scope, int index)
    {
      if (_scope_vars == null)
        _scope_vars = new List<ScopeVariable> ();
      _scope_vars.Add (
        new ScopeVariable (scope, index));
    }

    public string RealMethodName {
      get { return _real_name; }
    }

    public void SetRealMethodName (string name)
    {
      _real_name = name;
    }

    public ICompileUnit SourceFile {
      get { return _comp_unit; }
    }

    public IMethodDef Method {
      get { return _method; }
    }

    public void DefineMethod (MonoSymbolFile file)
    {
      LineNumberEntry[] lines = new LineNumberEntry [method_lines_pos];
      Array.Copy (method_lines, lines, method_lines_pos);

      MethodEntry entry = new MethodEntry (
        file, _comp_unit.Entry, _method.Token, ScopeVariables,
        Locals, lines, Blocks, RealMethodName, 0, //_method_flags,
        _ns_id);

      file.AddMethod (entry);
    }
  }
}