.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
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// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
//
// 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.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Threading;
using System.Xml;
using ICSharpCode.AvalonEdit.Folding;
using ICSharpCode.AvalonEdit.Highlighting;
using ICSharpCode.AvalonEdit.Highlighting.Xshd;
using ICSharpCode.Decompiler;
using ICSharpCode.ILSpy.TreeNodes;
using Microsoft.Win32;
using Mono.Cecil;
namespace ICSharpCode.ILSpy.TextView
{
/// <summary>
/// Manages the TextEditor showing the decompiled code.
/// </summary>
sealed partial class DecompilerTextView : UserControl
{
readonly ReferenceElementGenerator referenceElementGenerator;
readonly UIElementGenerator uiElementGenerator;
readonly FoldingManager foldingManager;
internal MainWindow mainWindow;
DefinitionLookup definitionLookup;
CancellationTokenSource currentCancellationTokenSource;
#region Constructor
public DecompilerTextView()
{
HighlightingManager.Instance.RegisterHighlighting(
"ILAsm", new string[] { ".il" },
delegate {
using (Stream s = typeof(DecompilerTextView).Assembly.GetManifestResourceStream(typeof(DecompilerTextView), "ILAsm-Mode.xshd")) {
using (XmlTextReader reader = new XmlTextReader(s)) {
return HighlightingLoader.Load(reader, HighlightingManager.Instance);
}
}
});
InitializeComponent();
this.referenceElementGenerator = new ReferenceElementGenerator(this);
textEditor.TextArea.TextView.ElementGenerators.Add(referenceElementGenerator);
this.uiElementGenerator = new UIElementGenerator();
textEditor.TextArea.TextView.ElementGenerators.Add(uiElementGenerator);
textEditor.Text = "Welcome to ILSpy!";
foldingManager = FoldingManager.Install(textEditor.TextArea);
}
#endregion
#region RunWithCancellation
void RunWithCancellation<T>(Func<CancellationToken, Task<T>> taskCreation, Action<Task<T>> taskCompleted)
{
if (waitAdorner.Visibility != Visibility.Visible) {
waitAdorner.Visibility = Visibility.Visible;
waitAdorner.BeginAnimation(OpacityProperty, new DoubleAnimation(0, 1, new Duration(TimeSpan.FromSeconds(0.5)), FillBehavior.Stop));
}
CancellationTokenSource previousCancellationTokenSource = currentCancellationTokenSource;
var myCancellationTokenSource = new CancellationTokenSource();
currentCancellationTokenSource = myCancellationTokenSource;
// cancel the previous only after current was set to the new one (avoid that the old one still finishes successfully)
if (previousCancellationTokenSource != null)
previousCancellationTokenSource.Cancel();
var task = taskCreation(myCancellationTokenSource.Token);
Action continuation = delegate {
try {
if (currentCancellationTokenSource == myCancellationTokenSource) {
currentCancellationTokenSource = null;
waitAdorner.Visibility = Visibility.Collapsed;
taskCompleted(task);
} else {
try {
task.Wait();
} catch (AggregateException) {
// observe the exception (otherwise the task's finalizer will shut down the AppDomain)
}
}
} finally {
myCancellationTokenSource.Dispose();
}
};
task.ContinueWith(delegate { Dispatcher.BeginInvoke(DispatcherPriority.Normal, continuation); });
}
void cancelButton_Click(object sender, RoutedEventArgs e)
{
if (currentCancellationTokenSource != null)
currentCancellationTokenSource.Cancel();
}
#endregion
#region ShowOutput
void ShowOutput(SmartTextOutput textOutput, ILSpy.Language language = null)
{
textEditor.ScrollToHome();
foldingManager.Clear();
uiElementGenerator.UIElements = textOutput.UIElements;
referenceElementGenerator.References = textOutput.References;
definitionLookup = textOutput.DefinitionLookup;
textEditor.SyntaxHighlighting = language != null ? language.SyntaxHighlighting : null;
textEditor.Text = textOutput.ToString();
foldingManager.UpdateFoldings(textOutput.Foldings.OrderBy(f => f.StartOffset), -1);
}
#endregion
#region Decompile (for display)
const int defaultOutputLengthLimit = 5000000; // more than 5M characters is too slow to output (when user browses treeview)
const int extendedOutputLengthLimit = 75000000; // more than 75M characters can get us into trouble with memory usage
public void Decompile(ILSpy.Language language, IEnumerable<ILSpyTreeNodeBase> treeNodes, DecompilationOptions options)
{
Decompile(language, treeNodes.ToArray(), defaultOutputLengthLimit, options);
}
void Decompile(ILSpy.Language language, ILSpyTreeNodeBase[] treeNodes, int outputLengthLimit, DecompilationOptions options)
{
RunWithCancellation(
delegate (CancellationToken ct) { // creation of the background task
options.CancellationToken = ct;
return RunDecompiler(language, treeNodes, options, outputLengthLimit);
},
delegate (Task<SmartTextOutput> task) { // handling the result
try {
SmartTextOutput textOutput = task.Result;
Debug.WriteLine("Decompiler finished; output size = {0} characters", textOutput.TextLength);
ShowOutput(textOutput, language);
} catch (AggregateException aggregateException) {
textEditor.SyntaxHighlighting = null;
Debug.WriteLine("Decompiler crashed: " + aggregateException.ToString());
// Unpack aggregate exceptions as long as there's only a single exception:
// (assembly load errors might produce nested aggregate exceptions)
Exception ex = aggregateException;
while (ex is AggregateException && (ex as AggregateException).InnerExceptions.Count == 1)
ex = ex.InnerException;
if (ex is OutputLengthExceededException) {
ShowOutputLengthExceededMessage(language, treeNodes, options, outputLengthLimit == defaultOutputLengthLimit);
} else {
SmartTextOutput output = new SmartTextOutput();
output.WriteLine(ex.ToString());
ShowOutput(output);
}
}
});
}
static Task<SmartTextOutput> RunDecompiler(ILSpy.Language language, ILSpyTreeNodeBase[] nodes, DecompilationOptions options, int outputLengthLimit)
{
Debug.WriteLine("Start decompilation of {0} nodes", nodes.Length);
if (nodes.Length == 0) {
// If there's nothing to be decompiled, don't bother starting up a thread.
// (Improves perf in some cases since we don't have to wait for the thread-pool to accept our task)
TaskCompletionSource<SmartTextOutput> tcs = new TaskCompletionSource<SmartTextOutput>();
tcs.SetResult(new SmartTextOutput());
return tcs.Task;
}
return Task.Factory.StartNew(
delegate {
SmartTextOutput textOutput = new SmartTextOutput();
textOutput.LengthLimit = outputLengthLimit;
DecompileNodes(language, nodes, options, textOutput);
return textOutput;
});
}
static void DecompileNodes(ILSpy.Language language, ILSpyTreeNodeBase[] nodes, DecompilationOptions options, ITextOutput textOutput)
{
bool first = true;
foreach (var node in nodes) {
if (first) first = false; else textOutput.WriteLine();
options.CancellationToken.ThrowIfCancellationRequested();
node.Decompile(language, textOutput, options);
}
}
#endregion
#region ShowOutputLengthExceededMessage
void ShowOutputLengthExceededMessage(ILSpy.Language language, ILSpyTreeNodeBase[] treeNodes, DecompilationOptions options, bool wasNormalLimit)
{
SmartTextOutput output = new SmartTextOutput();
if (wasNormalLimit) {
output.WriteLine("You have selected too much code for it to be displayed automatically.");
} else {
output.WriteLine("You have selected too much code; it cannot be displayed here.");
}
output.WriteLine();
Button button;
if (wasNormalLimit) {
output.AddUIElement(MakeButton(
Images.ViewCode, "Display Code",
delegate {
Decompile(language, treeNodes, extendedOutputLengthLimit, options);
}));
output.WriteLine();
}
output.AddUIElement(MakeButton(
Images.Save, "Save Code",
delegate {
SaveToDisk(language, treeNodes, options);
}));
output.WriteLine();
ShowOutput(output);
}
Func<Button> MakeButton(ImageSource icon, string text, RoutedEventHandler click)
{
return () => {
Button button = new Button();
button.Cursor = Cursors.Arrow;
button.Margin = new Thickness(2);
if (icon != null) {
button.Content = new StackPanel {
Orientation = Orientation.Horizontal,
Children = {
new Image { Width = 16, Height = 16, Source = icon, Margin = new Thickness(0, 0, 4, 0) },
new TextBlock { Text = text }
}
};
} else {
button.Content = text;
}
button.Click += click;
return button;
};
}
#endregion
#region JumpToReference
internal void JumpToReference(ReferenceSegment referenceSegment)
{
object reference = referenceSegment.Reference;
if (definitionLookup != null) {
int pos = definitionLookup.GetDefinitionPosition(reference);
if (pos >= 0) {
textEditor.TextArea.Focus();
textEditor.Select(pos, 0);
textEditor.ScrollTo(textEditor.TextArea.Caret.Line, textEditor.TextArea.Caret.Column);
Dispatcher.Invoke(DispatcherPriority.Background, new Action(
delegate {
CaretHighlightAdorner.DisplayCaretHighlightAnimation(textEditor.TextArea);
}));
return;
}
}
var assemblyList = mainWindow.AssemblyList;
if (reference is TypeReference) {
mainWindow.SelectNode(assemblyList.FindTypeNode(((TypeReference)reference).Resolve()));
} else if (reference is MethodReference) {
mainWindow.SelectNode(assemblyList.FindMethodNode(((MethodReference)reference).Resolve()));
} else if (reference is FieldReference) {
mainWindow.SelectNode(assemblyList.FindFieldNode(((FieldReference)reference).Resolve()));
} else if (reference is PropertyReference) {
mainWindow.SelectNode(assemblyList.FindPropertyNode(((PropertyReference)reference).Resolve()));
} else if (reference is EventReference) {
mainWindow.SelectNode(assemblyList.FindEventNode(((EventReference)reference).Resolve()));
} else if (reference is AssemblyDefinition) {
mainWindow.SelectNode(assemblyList.Assemblies.FirstOrDefault(node => node.AssemblyDefinition == reference));
}
}
#endregion
#region SaveToDisk
public void SaveToDisk(ILSpy.Language language, IEnumerable<ILSpyTreeNodeBase> treeNodes, DecompilationOptions options)
{
if (!treeNodes.Any())
return;
SaveFileDialog dlg = new SaveFileDialog();
dlg.DefaultExt = language.FileExtension;
dlg.Filter = language.Name + "|*" + language.FileExtension + "|All Files|*.*";
dlg.FileName = CleanUpName(treeNodes.First().ToString()) + language.FileExtension;
if (dlg.ShowDialog() == true) {
SaveToDisk(language, treeNodes.ToArray(), options, dlg.FileName);
}
}
void SaveToDisk(ILSpy.Language language, ILSpyTreeNodeBase[] nodes, DecompilationOptions options, string fileName)
{
RunWithCancellation(
delegate (CancellationToken ct) {
options.CancellationToken = ct;
return Task.Factory.StartNew(
delegate {
using (StreamWriter w = new StreamWriter(fileName)) {
try {
DecompileNodes(language, nodes, options, new PlainTextOutput(w));
} catch (OperationCanceledException) {
w.WriteLine();
w.WriteLine("Decompiled was cancelled.");
throw;
}
}
SmartTextOutput output = new SmartTextOutput();
output.WriteLine("Decompilation complete.");
output.WriteLine();
output.AddUIElement(MakeButton(
null, "Open Explorer",
delegate {
Process.Start("explorer", "/select,\"" + fileName + "\"");
}
));
output.WriteLine();
return output;
});
},
delegate (Task<SmartTextOutput> task) {
try {
ShowOutput(task.Result);
} catch (AggregateException aggregateException) {
textEditor.SyntaxHighlighting = null;
Debug.WriteLine("Decompiler crashed: " + aggregateException.ToString());
// Unpack aggregate exceptions as long as there's only a single exception:
// (assembly load errors might produce nested aggregate exceptions)
Exception ex = aggregateException;
while (ex is AggregateException && (ex as AggregateException).InnerExceptions.Count == 1)
ex = ex.InnerException;
SmartTextOutput output = new SmartTextOutput();
output.WriteLine(ex.ToString());
ShowOutput(output);
}
});
}
string CleanUpName(string text)
{
int pos = text.IndexOf(':');
if (pos > 0)
text = text.Substring(0, pos);
text = text.Trim();
foreach (char c in Path.GetInvalidFileNameChars())
text = text.Replace(c, '-');
return text;
}
#endregion
}
}