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//
// Author:
// Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2015 Jb Evain
// Copyright (c) 2008 - 2011 Novell, Inc.
//
// Licensed under the MIT/X11 license.
//
using System;
using System.Collections.Generic;
using System.Diagnostics.SymbolStore;
using Mono.Cecil.Cil;
using Mono.Collections.Generic;
#if !READ_ONLY
namespace Mono.Cecil.Pdb {
public class PdbWriter : Cil.ISymbolWriter {
readonly ModuleDefinition module;
readonly SymWriter writer;
readonly Dictionary<string, SymDocumentWriter> documents;
internal PdbWriter (ModuleDefinition module, SymWriter writer)
{
this.module = module;
this.writer = writer;
this.documents = new Dictionary<string, SymDocumentWriter> ();
}
public bool GetDebugHeader (out ImageDebugDirectory directory, out byte [] header)
{
header = writer.GetDebugInfo (out directory);
return true;
}
public void Write (MethodBody body)
{
var method_token = body.Method.MetadataToken;
var sym_token = new SymbolToken (method_token.ToInt32 ());
var instructions = CollectInstructions (body);
if (instructions.Count == 0)
return;
var start_offset = 0;
var end_offset = body.CodeSize;
writer.OpenMethod (sym_token);
writer.OpenScope (start_offset);
DefineSequencePoints (instructions);
DefineVariables (body, start_offset, end_offset);
writer.CloseScope (end_offset);
writer.CloseMethod ();
}
Collection<Instruction> CollectInstructions (MethodBody body)
{
var collection = new Collection<Instruction> ();
var instructions = body.Instructions;
for (int i = 0; i < instructions.Count; i++) {
var instruction = instructions [i];
var sequence_point = instruction.SequencePoint;
if (sequence_point == null)
continue;
GetDocument (sequence_point.Document);
collection.Add (instruction);
}
return collection;
}
void DefineVariables (MethodBody body, int start_offset, int end_offset)
{
if (!body.HasVariables)
return;
var sym_token = new SymbolToken (body.LocalVarToken.ToInt32 ());
var variables = body.Variables;
for (int i = 0; i < variables.Count; i++) {
var variable = variables [i];
CreateLocalVariable (variable, sym_token, start_offset, end_offset);
}
}
void DefineSequencePoints (Collection<Instruction> instructions)
{
for (int i = 0; i < instructions.Count; i++) {
var instruction = instructions [i];
var sequence_point = instruction.SequencePoint;
writer.DefineSequencePoints (
GetDocument (sequence_point.Document),
new [] { instruction.Offset },
new [] { sequence_point.StartLine },
new [] { sequence_point.StartColumn },
new [] { sequence_point.EndLine },
new [] { sequence_point.EndColumn });
}
}
void CreateLocalVariable (VariableDefinition variable, SymbolToken local_var_token, int start_offset, int end_offset)
{
writer.DefineLocalVariable2 (
variable.Name,
0,
local_var_token,
SymAddressKind.ILOffset,
variable.Index,
0,
0,
start_offset,
end_offset);
}
SymDocumentWriter GetDocument (Document document)
{
if (document == null)
return null;
SymDocumentWriter doc_writer;
if (documents.TryGetValue (document.Url, out doc_writer))
return doc_writer;
doc_writer = writer.DefineDocument (
document.Url,
document.Language.ToGuid (),
document.LanguageVendor.ToGuid (),
document.Type.ToGuid ());
documents [document.Url] = doc_writer;
return doc_writer;
}
public void Write (MethodSymbols symbols)
{
var sym_token = new SymbolToken (symbols.MethodToken.ToInt32 ());
var start_offset = 0;
var end_offset = symbols.CodeSize;
writer.OpenMethod (sym_token);
writer.OpenScope (start_offset);
DefineSequencePoints (symbols);
DefineVariables (symbols, start_offset, end_offset);
writer.CloseScope (end_offset);
writer.CloseMethod ();
}
void DefineSequencePoints (MethodSymbols symbols)
{
var instructions = symbols.instructions;
for (int i = 0; i < instructions.Count; i++) {
var instruction = instructions [i];
var sequence_point = instruction.SequencePoint;
writer.DefineSequencePoints (
GetDocument (sequence_point.Document),
new [] { instruction.Offset },
new [] { sequence_point.StartLine },
new [] { sequence_point.StartColumn },
new [] { sequence_point.EndLine },
new [] { sequence_point.EndColumn });
}
}
void DefineVariables (MethodSymbols symbols, int start_offset, int end_offset)
{
if (!symbols.HasVariables)
return;
var sym_token = new SymbolToken (symbols.LocalVarToken.ToInt32 ());
var variables = symbols.Variables;
for (int i = 0; i < variables.Count; i++) {
var variable = variables [i];
CreateLocalVariable (variable, sym_token, start_offset, end_offset);
}
}
public void Dispose ()
{
var entry_point = module.EntryPoint;
if (entry_point != null)
writer.SetUserEntryPoint (new SymbolToken (entry_point.MetadataToken.ToInt32 ()));
writer.Close ();
}
}
}
#endif
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