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//
// minvoke.cs
//
// (C) 2009 Novell, Inc. (http://www.novell.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.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Mono.Cecil;
using Mono.Cecil.Cil;
namespace MInvoke {
class ImportKey {
public string module_name;
public string entry_point;
public ImportKey (string moduleName, string entryPointName)
{
module_name = moduleName.ToLower();
entry_point = entryPointName;
}
public override int GetHashCode ()
{
return module_name.GetHashCode() ^ entry_point.GetHashCode();
}
public override bool Equals (object o)
{
ImportKey key = o as ImportKey;
if (key == null)
return false;
return key.module_name == module_name && key.entry_point == entry_point;
}
}
class DllImportMap : Dictionary<ImportKey, MethodDefinition> { }
class DllImports : Dictionary<ImportKey, MethodDefinition> { }
static class CecilRocks {
public static IEnumerable<TypeDefinition> GetAllTypes (this ModuleDefinition self)
{
return self.Types.SelectMany (t => t.GetAllTypes ());
}
static IEnumerable<TypeDefinition> GetAllTypes (this TypeDefinition self)
{
yield return self;
if (!self.HasNestedTypes)
yield break;
foreach (var type in self.NestedTypes.SelectMany (t => t.GetAllTypes ()))
yield return type;
}
}
public class MInvoke {
private static CustomAttribute GetMapDllImportAttribute (ICustomAttributeProvider provider)
{
foreach (CustomAttribute ca in provider.CustomAttributes) {
TypeDefinition resolved = ca.AttributeType.Resolve ();
if (resolved != null) {
if (resolved.Name == "MapDllImport") {
// Console.WriteLine ("{0} has a MapDllImportAttribute ({1})", provider,
// ca.ConstructorParameters[0]);
return ca;
}
}
}
return null;
}
private static bool IsFinalizer (MethodDefinition method)
{
if (method.Name != "Finalize")
return false;
if (!method.IsVirtual)
return false;
if (method.Parameters.Count != 0)
return false;
return true;
}
private static DllImportMap BuildMap (string map_assembly)
{
DllImportMap map = new DllImportMap ();
var assembly = AssemblyDefinition.ReadAssembly (map_assembly);
foreach (TypeDefinition t in assembly.MainModule.GetAllTypes ()) {
if (t.Name == "<Module>")
continue;
if (t.IsSpecialName || t.IsRuntimeSpecialName)
continue;
foreach (MethodDefinition md in t.Methods) {
if (md.IsSpecialName)
continue;
if (IsFinalizer (md))
continue;
CustomAttribute attr = GetMapDllImportAttribute (md);
if (attr == null)
continue;
ImportKey key = new ImportKey (attr.ConstructorArguments [0].Value.ToString(), md.Name);
map.Add (key, md);
}
}
return map;
}
private static DllImports CollectDllImports (AssemblyDefinition assembly)
{
DllImports imports = new DllImports ();
foreach (TypeDefinition t in assembly.MainModule.GetAllTypes ()) {
if (t.Name == "<Module>")
continue;
if (t.IsSpecialName || t.IsRuntimeSpecialName)
continue;
foreach (MethodDefinition md in t.Methods) {
if (md.IsSpecialName)
continue;
if (IsFinalizer (md))
continue;
PInvokeInfo pinfo = md.PInvokeInfo;
if (pinfo == null)
continue;
// Console.WriteLine ("{0} is a pinvoke, hashcode = {1}", md, md.GetHashCode());
ImportKey key = new ImportKey (pinfo.Module.Name, pinfo.EntryPoint);
if (imports.ContainsKey (key))
Console.WriteLine ("WARNING: pinvoke {0}/{1} shows up more than once in input assembly", key.module_name, key.entry_point);
else
imports.Add (key, md);
}
}
return imports;
}
private static void Retarget (AssemblyDefinition assembly, DllImportMap map, DllImports imports)
{
foreach (TypeDefinition t in assembly.MainModule.Types) {
if (t.Name == "<Module>")
continue;
Retarget (t, map, imports);
}
}
private static void Retarget (TypeDefinition type, DllImportMap map, DllImports imports)
{
foreach (var nested in type.NestedTypes)
Retarget (nested, map, imports);
foreach (MethodDefinition md in type.Methods) {
if (!md.HasBody)
continue;
for (int i = 0; i < md.Body.Instructions.Count; i ++) {
Instruction ins = md.Body.Instructions[i];
if (ins.OpCode == OpCodes.Call) {
MethodDefinition method_operand = ins.Operand as MethodDefinition;
if (method_operand == null)
continue;
PInvokeInfo pinfo = method_operand.PInvokeInfo;
if (pinfo == null)
continue;
ImportKey key = new ImportKey (pinfo.Module.Name, pinfo.EntryPoint);
if (imports.ContainsKey (key)) {
//Console.WriteLine ("{0} is a pinvoke, {1}/{2}", method_operand, pinfo.EntryPoint, pinfo.Module.Name);
if (map.ContainsKey (key)) {
Console.WriteLine ("retargeting reference to method method {0}/{1}", key.module_name, key.entry_point);
var il = md.Body.GetILProcessor ();
MethodDefinition mapped_method = map[key];
MethodReference mapped_ref;
mapped_ref = type.Module.Import(mapped_method);
Instruction callMethod = il.Create(OpCodes.Call, mapped_ref);
il.Replace (ins, callMethod);
}
else {
Console.WriteLine ("WARNING: no map entry for method {0}/{1}", key.module_name, key.entry_point);
}
}
}
}
}
}
public static void Main (string[] args) {
if (args.Length != 3) {
Console.Error.WriteLine ("usage: minvoke.exe MapAssemblyName InputAssemblyName OutputAssemblyName");
Environment.Exit (1);
}
string map_assembly_name = args[0];
string input_assembly_name = args[1];
string output_assembly_name = args[2];
Console.WriteLine ("building list of MapDllImports from map assembly {0}", map_assembly_name);
DllImportMap map = BuildMap (map_assembly_name);
Console.WriteLine ("building list of DllImports in input assembly {0}", input_assembly_name);
var input_assembly = AssemblyDefinition.ReadAssembly (input_assembly_name);
DllImports imports = CollectDllImports (input_assembly);
Console.WriteLine ("retargeting assembly {0} -> {1}", input_assembly_name, output_assembly_name);
Retarget (input_assembly, map, imports);
input_assembly.Write (output_assembly_name);
}
}
}
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