static void Main(string[] args)
{
ParseArguments(args);
Console.WriteLine("[UnsafeUtilityPatcher] Patching assembly : " + s_AssemblyPath + " to : " + s_OutputPath);
var assembly = AssemblyDefinition.ReadAssembly(s_AssemblyPath, new ReaderParameters {
SymbolReaderProvider = CreateDebugReaderProviderFor(s_AssemblyPath)
});
var UnsafeUtilityType = assembly.MainModule.Types.Single(t => t.Name.Equals(kUnsafeUtilityIdentifier));
var ctx = new UnsafeUtilityPatcherContext(UnsafeUtilityType, false);
InjectUtilityCopyPtrToStructure(ctx);
InjectUtilityCopyStructureToPtr(ctx);
InjectUtilityAddressOf(ctx);
InjectUtilitySizeOf(ctx);
InjectUtilityAlignOf(ctx);
InjectUtilityReadArrayElement(ctx);
InjectUtilityReadArrayElementWithStride(ctx);
InjectUtilityWriteArrayElement(ctx);
InjectUtilityWriteArrayElementWithStride(ctx);
InjectUtilityAsRef(ctx);
EnsureTargetFolderExists(s_OutputPath);
assembly.Write(s_OutputPath, new WriterParameters {
SymbolWriterProvider = CreateDebugWriterProviderFor(s_AssemblyPath)
});
}
private static void InjectUtilityArrayElementAsRef(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityArrayElementAsRef);
/*
* ldarg.0
* ldarg.1
* sizeof !T
* mul
* add
* ret
*/
var method = ctx.m_PatchedClass.Methods.Single(m => m.Name.Equals(kUnsafeUtilityArrayElementAsRef));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_1));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I8));
ilProcessor.Append(ilProcessor.Create(OpCodes.Sizeof, method.GenericParameters[0]));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I8));
ilProcessor.Append(ilProcessor.Create(OpCodes.Mul));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I));
ilProcessor.Append(ilProcessor.Create(OpCodes.Add));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static void InjectUtilityWriteArrayElementWithStride(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityWriteArrayElementWithStride);
/*
* ldarg.0
* ldarg.1
* conv.i8
* ldarg.2
* conv.i8
* mul
* conv.i
* add
* ldarg.3
* stobj !T
* ret
*/
var method = ctx.m_PatchedClass.Methods.Single(m => m.Name.Equals(kUnsafeUtilityWriteArrayElementWithStride));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_1));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I8));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_2));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I8));
ilProcessor.Append(ilProcessor.Create(OpCodes.Mul));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I));
ilProcessor.Append(ilProcessor.Create(OpCodes.Add));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_3));
ilProcessor.Append(ilProcessor.Create(OpCodes.Stobj, method.GenericParameters[0]));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static void LoadField(UnsafeUtilityPatcherContext ctx, string fieldName, ILProcessor ilProcessor)
{
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
var field = ctx.m_PatchedClass.Fields.Single(f => f.Name == fieldName);
var fieldReference = new FieldReference(field.Name, field.FieldType, ctx.m_GenericInstanceType);
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldfld, fieldReference));
}
private static void InjectUtilityAsRef(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityAsRef);
/*
* ldarg.0
* ret
*/
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static void InjectUtilityAlignOf(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityAlignOf);
/*
* // @todo : Implement
* ldc.i4 4
* ret
*/
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldc_I4, 4));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static void InjectUtilitySizeOfNonGeneric(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilitySizeOfNonGeneric);
/*
* sizeof !T
* ret
*/
var method = ctx.m_PatchedClass.Methods.Single(m => m.Name.Equals(kUnsafeUtilitySizeOf) && m.HasGenericParameters);
ilProcessor.Append(ilProcessor.Create(OpCodes.Sizeof, method.GenericParameters[0]));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static ILProcessor GetILProcessorForMethod(UnsafeUtilityPatcherContext ctx, string methodName, bool clear = true)
{
var method = ctx.m_PatchedClass.Methods.Single(m => m.Name.Equals(methodName) && m.HasGenericParameters);
var ilProcessor = method.Body.GetILProcessor();
if (clear)
{
ilProcessor.Body.Instructions.Clear();
ilProcessor.Body.Variables.Clear();
ilProcessor.Body.ExceptionHandlers.Clear();
}
return(ilProcessor);
}
private static void InjectUtilityInternalEnumToInt(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityInternalEnumToInt);
/*
* ldarg.0
* conv.i4
* ret
*/
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I4));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static void CallMethod(UnsafeUtilityPatcherContext ctx, string methodName, ILProcessor ilProcessor)
{
var method = ctx.m_PatchedClass.GetMethods().Single(m => m.Name == methodName);
var methodReference = new MethodReference(method.Name, method.ReturnType, ctx.m_GenericInstanceType)
{
CallingConvention = method.CallingConvention,
HasThis = method.HasThis,
};
foreach (var param in method.Parameters)
{
methodReference.Parameters.Add(param);
}
ilProcessor.Append(ilProcessor.Create(OpCodes.Call, methodReference));
}
private static void InjectUtilityCopyStructureToPtr(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityCopyStructureToPtr);
/*
* ldarg.0
* ldobj !T
* ldarg.1
* stind.i
* ret
*/
var method = ctx.m_PatchedClass.Methods.Single(m => m.Name.Equals(kUnsafeUtilityCopyStructureToPtr));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_1));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldobj, method.GenericParameters[0]));
ilProcessor.Append(ilProcessor.Create(OpCodes.Stobj, method.GenericParameters[0]));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}
private static void InjectUtilityEnumEquals(UnsafeUtilityPatcherContext ctx)
{
var ilProcessor = GetILProcessorForMethod(ctx, kUnsafeUtilityEnumEquals);
/*
* ldarg.0
* conv.i8
* ldarg.1
* conv.i8
* ceq
* ret
*/
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_0));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I8));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ldarg_1));
ilProcessor.Append(ilProcessor.Create(OpCodes.Conv_I8));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ceq));
ilProcessor.Append(ilProcessor.Create(OpCodes.Ret));
}