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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections.Generic;
using System.Dynamic.Utils;
using System.IO;
using System.Reflection;
using System.Reflection.Emit;
using System.Security;
using System.Text;
using System.Threading;
#if CLR2
namespace Microsoft.Scripting.Ast.Compiler {
#else
namespace System.Linq.Expressions.Compiler {
#endif
internal sealed class AssemblyGen {
private static AssemblyGen _assembly;
// Testing options. Only ever set in CLR2 build
// configurations, see SetSaveAssemblies
#if CLR2
private static string _saveAssembliesPath;
private static bool _saveAssemblies;
#endif
private readonly AssemblyBuilder _myAssembly;
private readonly ModuleBuilder _myModule;
#if CLR2 && !SILVERLIGHT
private readonly string _outFileName; // can be null iff !SaveAndReloadAssemblies
private readonly string _outDir; // null means the current directory
#endif
private int _index;
private static AssemblyGen Assembly {
get {
if (_assembly == null) {
Interlocked.CompareExchange(ref _assembly, new AssemblyGen(), null);
}
return _assembly;
}
}
private AssemblyGen() {
var name = new AssemblyName("Snippets");
#if SILVERLIGHT // AssemblyBuilderAccess.RunAndSave, Environment.CurrentDirectory
_myAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run);
_myModule = _myAssembly.DefineDynamicModule(name.Name, false);
#else
// mark the assembly transparent so that it works in partial trust:
var attributes = new[] {
new CustomAttributeBuilder(typeof(SecurityTransparentAttribute).GetConstructor(Type.EmptyTypes), new object[0])
};
#if CLR2
if (_saveAssemblies) {
string outDir = _saveAssembliesPath ?? Directory.GetCurrentDirectory();
try {
outDir = Path.GetFullPath(outDir);
} catch (Exception) {
throw Error.InvalidOutputDir();
}
try {
Path.Combine(outDir, name.Name + ".dll");
} catch (ArgumentException) {
throw Error.InvalidAsmNameOrExtension();
}
_outFileName = name.Name + ".dll";
_outDir = outDir;
_myAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.RunAndSave, outDir,
null, null, null, null, false, attributes);
_myModule = _myAssembly.DefineDynamicModule(name.Name, _outFileName, false);
} else
#endif
{
_myAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run, attributes);
_myModule = _myAssembly.DefineDynamicModule(name.Name, false);
}
_myAssembly.DefineVersionInfoResource();
#endif
}
private TypeBuilder DefineType(string name, Type parent, TypeAttributes attr) {
ContractUtils.RequiresNotNull(name, "name");
ContractUtils.RequiresNotNull(parent, "parent");
StringBuilder sb = new StringBuilder(name);
int index = Interlocked.Increment(ref _index);
sb.Append("$");
sb.Append(index);
// There is a bug in Reflection.Emit that leads to
// Unhandled Exception: System.Runtime.InteropServices.COMException (0x80131130): Record not found on lookup.
// if there is any of the characters []*&+,\ in the type name and a method defined on the type is called.
sb.Replace('+', '_').Replace('[', '_').Replace(']', '_').Replace('*', '_').Replace('&', '_').Replace(',', '_').Replace('\\', '_');
name = sb.ToString();
return _myModule.DefineType(name, attr, parent);
}
internal static TypeBuilder DefineDelegateType(string name) {
return Assembly.DefineType(
name,
typeof(MulticastDelegate),
TypeAttributes.Class | TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.AnsiClass | TypeAttributes.AutoClass
);
}
#if CLR2
//Return the location of the saved assembly file.
//The file location is used by PE verification in Microsoft.Scripting.
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal string SaveAssembly() {
#if !SILVERLIGHT // AssemblyBuilder.Save
_myAssembly.Save(_outFileName, PortableExecutableKinds.ILOnly, ImageFileMachine.I386);
return Path.Combine(_outDir, _outFileName);
#else
return null;
#endif
}
// NOTE: this method is called through reflection from Microsoft.Scripting
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal static void SetSaveAssemblies(bool enable, string directory) {
_saveAssemblies = enable;
_saveAssembliesPath = directory;
}
// NOTE: this method is called through reflection from Microsoft.Scripting
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal static string[] SaveAssembliesToDisk() {
if (!_saveAssemblies) {
return new string[0];
}
var assemlyLocations = new List<string>();
// first save all assemblies to disk:
if (_assembly != null) {
string assemblyLocation = _assembly.SaveAssembly();
if (assemblyLocation != null) {
assemlyLocations.Add(assemblyLocation);
}
_assembly = null;
}
return assemlyLocations.ToArray();
}
#endif
}
internal static class SymbolGuids {
internal static readonly Guid DocumentType_Text =
new Guid(0x5a869d0b, 0x6611, 0x11d3, 0xbd, 0x2a, 0, 0, 0xf8, 8, 0x49, 0xbd);
}
}
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