public ILConstructorDebugImpl(ConstructorBuilder constructor, IILGenForbidenInstructions forbidenInstructions, SourceCodeWriter sourceCodeWriter)
{
_constructor = constructor;
_sourceCodeWriter = sourceCodeWriter;
_forbidenInstructions = forbidenInstructions;
_expectedLength = 64;
}
/// <summary>
/// Defines an inner Delegate type for the method to be invoked from Objective-C runtime.
/// </summary>
// TODO: Refactor
private Type DefineDelegate (TypeBuilder typeBuilder, MethodInfo methodInfo, out ConstructorBuilder constructorBuilder)
{
// Get info about the target method
Type returnType = GetReturnType (methodInfo);
Type nativeReturnType = TypeHelper.GetNativeType (returnType, this.Is64Bits);
Type[] nativeParameterTypes = TypeHelper.GetNativeParameterTypes (methodInfo, this.Is64Bits);
// TODO: Refactor
// Remove first parameter of the extension method
nativeParameterTypes = ArrayHelper.TrimLeft (nativeParameterTypes, 1);
// Create the array of parameters for the delegate's invoke method
nativeParameterTypes = ArrayHelper.Prepend (nativeParameterTypes, typeof(IntPtr), typeof(IntPtr));
// Assign some names to parameters (for easy debugging)
String[] parameterNames = TypeHelper.GetParameterNames (methodInfo);
// TODO: Refactor
// Remove first parameter of the extension method
parameterNames = ArrayHelper.TrimLeft (parameterNames, 1);
String[] nativeParameterNames = new String[nativeParameterTypes.Length];
Array.Copy (parameterNames, 0, nativeParameterNames, 2, parameterNames.Length);
nativeParameterNames [0] = "receiver";
nativeParameterNames [1] = "selector";
// Create a unique delegate name
String name = GetUniqueName (methodInfo) + "_Invoker";
// Create a delegate
TypeBuilder delegateBuilder = EmitHelper.DefineNestedDelegate (typeBuilder, name, nativeReturnType, nativeParameterTypes, nativeParameterNames, out constructorBuilder);
// Generate the type
return delegateBuilder.CreateType ();
}
internal ConstructorEmitter(AbstractTypeEmitter maintype, params ArgumentReference[] arguments)
{
this.maintype = maintype;
var args = ArgumentsUtil.InitializeAndConvert(arguments);
builder = maintype.TypeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, args);
}
internal void Compile(ConstructorBuilder c)
{
if (Builder == null)
{
int ofs = (c.IsStatic ? 0 : 1);
Builder = c.DefineParameter(this.Index + ofs, this.Attributes, this.Name);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ConstructorBuilder"/> class
/// with the specified parameters.
/// </summary>
/// <param name="typeBuilder">Associated <see cref="TypeBuilderHelper"/>.</param>
/// <param name="constructorBuilder">A <see cref="ConstructorBuilder"/></param>
public ConstructorBuilderHelper(TypeBuilderHelper typeBuilder, ConstructorBuilder constructorBuilder)
: base(typeBuilder)
{
if (constructorBuilder == null) throw new ArgumentNullException("constructorBuilder");
_constructorBuilder = constructorBuilder;
_constructorBuilder.SetCustomAttribute(Type.Assembly.BLToolkitAttribute);
}
public static void DefineParams(ConstructorBuilder constructorBuilder, IEnumerable<RppParameterInfo> constructorParams)
{
int index = 1;
foreach (var param in constructorParams)
{
constructorBuilder.DefineParameter(index++, ParameterAttributes.None, RppClass.StringConstructorArgName(param.Name));
}
}
internal EasyConstructor( AbstractEasyType maintype, params ArgumentReference[] arguments )
{
_maintype = maintype;
Type[] args = ArgumentsUtil.InitializeAndConvert( arguments );
_builder = maintype.TypeBuilder.DefineConstructor(
MethodAttributes.Public, CallingConventions.Standard, args );
}
private void EnhanceType(TypeBuilder mainType, FieldBuilder handlerFieldBuilder, ConstructorBuilder constructorBuilder)
{
Assert.IsTrue( !m_enhanceInvoked );
Assert.IsNotNull(mainType);
Assert.IsNotNull(handlerFieldBuilder);
Assert.IsNotNull(constructorBuilder);
m_enhanceInvoked = true;
}
protected void DefineLoaderType(ConstructorBuilder factoryConstructorBuilder)
{
loaderBuilder.AddInterfaceImplementation(typeof(IFactoryLoader));
loaderBuilder.DefineDefaultConstructor(MethodAttributes.Public);
var methodIl = loaderBuilder.DefineMethod("CreateFactory", MethodAttributes.Public | MethodAttributes.Virtual,
typeof(object), factoryContructorParameters).GetILGenerator();
methodIl.Emit(OpCodes.Ldarg_1);
methodIl.Emit(OpCodes.Newobj, factoryConstructorBuilder);
methodIl.Emit(OpCodes.Ret);
}
public void EmitConstrucorIL(ConstructorBuilder builder)
{
ConstructorInfo conObj = typeof(object).GetConstructor(new Type[0]);
//call constructor of base object
ILGenerator il = builder.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, conObj);
il.Emit(OpCodes.Ret);
}
private static void DefineParameterNames(
ConstructorBuilder constructor,
ConstructorMetadata constructorMetadata)
{
for (var i = 0; i < constructorMetadata.Parameters.Length; i++)
{
var parameter = constructorMetadata.Parameters[i];
constructor.DefineParameter(parameter.Sequence, ParameterAttributes.None, parameter.Name);
}
}
static void EmitCtor (TypeBuilder genericFoo) {
ConstructorBuilder mb = genericFoo.DefineConstructor (MethodAttributes.Public, CallingConventions.Standard, null);
ILGenerator il = mb.GetILGenerator ();
for (int i = 0; i < 20; ++i)
il.Emit (OpCodes.Nop);
il.Emit (OpCodes.Ldarg_0);
il.Emit (OpCodes.Call, typeof (object).GetConstructors()[0]);
il.Emit (OpCodes.Ret);
ctor = mb;
}
public void Execute()
{
constructorBuilder = builder().TypeBuilder.DefineConstructor(
MethodAttributes.Public |
MethodAttributes.SpecialName |
MethodAttributes.RTSpecialName,
CallingConventions.Standard,
this.types().ToArray());
int counter = 1;
foreach(Type type in this.types())
{
constructorBuilder.DefineParameter(counter, ParameterAttributes.None, type.Name + "_" + counter);
counter++;
}
}
protected ILGenerator GetInitConstructorIL(ConstructorBuilder constructorBuilder, Dictionary<TypeFactoryMap, FieldBuilder> singletonFields)
{
var constrIl = constructorBuilder.GetILGenerator();
constrIl.Emit(OpCodes.Ldarg_0);
constrIl.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
foreach (var fieldPair in singletonFields)
{
var injectableGetSingletonMethod = typeof(IInjectableModule).GetMethod("GetSingleton").MakeGenericMethod(fieldPair.Key.BaseType);
constrIl.Emit(OpCodes.Ldarg_0);
constrIl.Emit(OpCodes.Ldarg_1);
constrIl.Emit(OpCodes.Ldstr, fieldPair.Key.Name);
constrIl.Emit(OpCodes.Callvirt, injectableGetSingletonMethod);
constrIl.Emit(OpCodes.Stfld, fieldPair.Value);
}
return constrIl;
}
public ConstructorBuilder DefineConstructorBuilder()
{
if (IsConstructor)
{
ConstructorBuilder = Parent.TypeBuilder.DefineConstructor(
GetMethodModifiers(),
CallingConventions.Standard,
GetArgumentTypes());
}
else
{
ConstructorBuilder = Parent.TypeBuilder.DefineTypeInitializer();
}
return ConstructorBuilder;
}
internal ConstructorEmitter(AbstractTypeEmitter maintype, params ArgumentReference[] arguments)
{
this.maintype = maintype;
var args = ArgumentsUtil.InitializeAndConvert(arguments);
builder = maintype.TypeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, args);
// if we don't copy the parameter attributes, the default binder will fail
// when trying to resolve constructors from the passed argument values.
for (int i = 0; i < args.Length; ++i)
{
var arg = arguments[i];
var paramBuilder = builder.DefineParameter(i + 1, arg.ParameterAttributes, "");
if (arg.DefaultValue != DBNull.Value)
paramBuilder.SetConstant(arg.DefaultValue);
}
}
public void Execute()
{
constructorBuilder = builder().TypeBuilder.DefineConstructor(
MethodAttributes.Public |
MethodAttributes.SpecialName |
MethodAttributes.RTSpecialName,
CallingConventions.Standard,
new Type[0]);
this.constructor = typeof(object).GetConstructor(new Type[0]);
ILGenerator il = constructorBuilder.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, constructor);
il.Emit(OpCodes.Ret);
}
public Type CreateContextType(List <Table> tables)
{
Type PocoType;
TypeBuilder PocoTypeBuilder;
//TypeBuilder ClassTypeBuilder;
Types.Clear();
TypeBuilders.Clear();
//Context
ContextTypeBuilder = DynamicTypeBuilder.GetTypeBuilder("Context", typeof(DbContextBase));
//Context Constructor
System.Reflection.Emit.ConstructorBuilder constructor = ContextTypeBuilder.DefineDefaultConstructor(System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.SpecialName | System.Reflection.MethodAttributes.RTSpecialName);
//Create Normal Poco Type to be used as a reference
foreach (Table table in tables)
{
TypeBuilders.Add(table.VariableName, CreatePocoTypeBuilder(table));
}
//Navigation properties
foreach (Table table in tables)
{
CreateNavigationProperties(table);
}
//Creates DbSet Propeties for the Context
foreach (Table ti in tables)
{
PocoTypeBuilder = TypeBuilders[ti.VariableName];
PocoType = PocoTypeBuilder.CreateType();
Types.Add(ti.VariableName, PocoType);
DynamicTypeBuilder.CreateProperty(ContextTypeBuilder, ti.VariableName, typeof(DbSet <>).MakeGenericType(new Type[] { PocoType }), false);
}
Type type = ContextTypeBuilder.CreateType();
return(type);
}
public void TestContainsAccessorAttributeWithDifferentOverload()
{
AssemblyName an = new AssemblyName();
an.Name = "DynamicRandomAssembly";
AssemblyBuilder ab = AssemblyBuilder.DefineDynamicAssembly(an, AssemblyBuilderAccess.Run);
ModuleBuilder mb = TestLibrary.Utilities.GetModuleBuilder(ab, "Module1");
TypeBuilder tb = mb.DefineType("DynamicRandomClass", TypeAttributes.Public);
Type[] parameterTypes = { typeof(int), typeof(double) };
System.Reflection.Emit.ConstructorBuilder cb =
tb.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, parameterTypes);
Assert.Contains("Public", cb.Attributes.ToString());
}
public ASMCompileContext()
: base(null)
{
this.FunctionList = new List<_FncInfo>();
AssemblyName aName = new AssemblyName("DynamicAssemblyExample");
this.ab = AppDomain.CurrentDomain.DefineDynamicAssembly(aName, AssemblyBuilderAccess.RunAndSave);
this.mb = this.ab.DefineDynamicModule(aName.Name, aName.Name + ".dll");
this.tb = this.mb.DefineType("MyDynamicType", TypeAttributes.Public, typeof(JSGlobalContext));
this.fncListField = this.tb.DefineField("fnclist", typeof(JSDebugFunctionDef[]), FieldAttributes.Static | FieldAttributes.Private);
this.ctor1 = this.tb.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, Type.EmptyTypes);
ILGenerator ctor1IL = this.ctor1.GetILGenerator();
ctor1IL.Emit(OpCodes.Ldarg_0);
ctor1IL.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
ctor1IL.Emit(OpCodes.Ret);
this.GlobalMethod = this.tb.DefineMethod("GlobalCode", MethodAttributes.Static | MethodAttributes.Public, typeof(JSValue), new Type[] { typeof(JSContext) });
this.GlobalMethod.DefineParameter(1, ParameterAttributes.None, "context");
base.fncData = new CompileContext.LocalFunctionData(this.GlobalMethod.GetILGenerator());
}
/// <summary>
/// Creates a ConstructorBuilder for current constructor entity.
/// </summary>
public override void PrepareSelf()
{
// todo: remove when we support static ctors
if(IsStatic)
throw new LensCompilerException(CompilerMessages.ConstructorStatic);
if (ConstructorBuilder != null || IsImported)
return;
var ctx = ContainerType.Context;
if (ArgumentTypes == null)
ArgumentTypes = Arguments == null
? new Type[0]
: Arguments.Values.Select(fa => fa.GetArgumentType(ctx)).ToArray();
ConstructorBuilder = ContainerType.TypeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.HasThis, ArgumentTypes);
Generator = ConstructorBuilder.GetILGenerator(Context.ILStreamSize);
}
private void EmitCtor(PropertyAndField[] properties, ConstructorBuilder method)
{
ILGenerator iLGenerator = method.GetILGenerator();
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Call, ObjectType.GetConstructor(Type.EmptyTypes));
int index = 0;
if (0 < properties.Length)
{
do
{
iLGenerator.Emit(OpCodes.Ldarg_0);
int arg = index + 1;
iLGenerator.Emit(OpCodes.Ldarg, arg);
iLGenerator.Emit(OpCodes.Stfld, properties[index].Field);
index = arg;
}
while (index < properties.Length);
}
iLGenerator.Emit(OpCodes.Ret);
}
protected internal override void OnCompile()
{
Builder = this.TargetClass.Builder.DefineConstructor(this.Attributes
, this.CallingConvention, this.ParameterTypes
);
ILGenerator il = SetILGenerator(Builder.GetILGenerator());
try
{
CompileParameters(Builder);
CompileLocals(il);
ILHelper msil = new ILHelper(il);
base.EmitInstructions(msil);
msil.Return();
}
finally
{
SetILGenerator(il);
}
}
static TypeBuilder DefineDelegate () {
TypeBuilder typeBuilder = module.DefineType( "MyDelegate",
TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.Sealed,
typeof (object) );
args = typeBuilder.DefineGenericParameters ("TIn", "TOut");
delegate_ctor = typeBuilder.DefineConstructor(
MethodAttributes.Public | MethodAttributes.HideBySig |
MethodAttributes.RTSpecialName | MethodAttributes.SpecialName,
CallingConventions.Standard,
new Type[] { typeof(Object), typeof (IntPtr) } );
delegate_ctor.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed );
invoke_mb = typeBuilder.DefineMethod(
"Invoke",
MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
args [1],
new Type[] { args [0] } );
invoke_mb.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed );
MethodBuilder mb = typeBuilder.DefineMethod(
"BeginInvoke",
MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
typeof (IAsyncResult),
new Type[] { args [0], typeof (AsyncCallback), typeof (object) } );
mb.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed );
mb = typeBuilder.DefineMethod(
"EndInvoke",
MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
args [1],
new Type[] { typeof (IAsyncResult) } );
mb.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed );
return typeBuilder;
}
void SetUp (AssemblyBuilderAccess access)
{
AssemblyName assemblyName = new AssemblyName ();
assemblyName.Name = ASSEMBLY_NAME;
assembly = AppDomain.CurrentDomain.DefineDynamicAssembly (
assemblyName, access,
Path.GetTempPath ());
module = assembly.DefineDynamicModule ("module1");
tb = module.DefineType ("Bar");
GenericTypeParameterBuilder [] typeParams = tb.DefineGenericParameters ("T");
cb = tb.DefineConstructor (MethodAttributes.Public,
CallingConventions.Standard,
new Type [] { typeof (string), typeof (int) });
ILGenerator ig = cb.GetILGenerator ();
ig.Emit (OpCodes.Ret);
typeBarOfInt32 = tb.MakeGenericType (typeof (int));
ci = TypeBuilder.GetConstructor (typeBarOfInt32, cb);
}
[System.Security.SecurityCritical] // auto-generated
private ConstructorBuilder DefineTypeInitializerNoLock()
{
ThrowIfCreated();
// change the attributes and the class constructor's name
MethodAttributes attr = MethodAttributes.Private | MethodAttributes.Static | MethodAttributes.SpecialName;
ConstructorBuilder constBuilder = new ConstructorBuilder(
ConstructorInfo.TypeConstructorName, attr, CallingConventions.Standard, null, m_module, this);
return constBuilder;
}
public ConstructorBuilder DefineConstructor (MethodAttributes attributes, CallingConventions callingConvention, Type[] parameterTypes, Type[][] requiredCustomModifiers, Type[][] optionalCustomModifiers)
{
check_not_created ();
ConstructorBuilder cb = new ConstructorBuilder (this, attributes,
callingConvention, parameterTypes, requiredCustomModifiers,
optionalCustomModifiers);
if (ctors != null) {
ConstructorBuilder[] new_ctors = new ConstructorBuilder [ctors.Length+1];
System.Array.Copy (ctors, new_ctors, ctors.Length);
new_ctors [ctors.Length] = cb;
ctors = new_ctors;
} else {
ctors = new ConstructorBuilder [1];
ctors [0] = cb;
}
return cb;
}
private void NegTestCaseVerificationHelper(
ConstructorBuilder constructor,
int sequence,
ParameterAttributes attribute,
string paramName,
Type desiredException)
{
Assert.Throws(desiredException, () => { constructor.DefineParameter(sequence, attribute, paramName); });
}
public Type CreateContextType(List <Table> tables, string cString)
{
Types.Clear();
TypeBuilders.Clear();
_logger.LogTrace("Start building runtime DynamicDbContext");
//Context
ContextTypeBuilder = _typeBuilder.GetTypeBuilder("DynamicDbContext", typeof(DbContextBase));
//Context Constructor
System.Reflection.Emit.ConstructorBuilder constructor = ContextTypeBuilder.DefineDefaultConstructor(
System.Reflection.MethodAttributes.Public |
System.Reflection.MethodAttributes.SpecialName |
System.Reflection.MethodAttributes.RTSpecialName);
//Create Normal Poco Type to be used as a reference
foreach (Table table in tables)
{
TypeBuilders.Add(table.VariableName, CreatePocoTypeBuilder(table));
}
_logger.LogTrace("Start building navigation properties");
//Navigation properties
foreach (Table table in tables)
{
CreateNavigationProperties(table);
}
_logger.LogTrace("Start building Dbset for each table");
//Creates DbSet Properties for the Context
foreach (Table ti in tables)
{
var pocoTypeBuilder = TypeBuilders[ti.VariableName];
var pocoType = pocoTypeBuilder.CreateType();
Types.Add(ti.VariableName, pocoType);
_typeBuilder.CreateProperty(ContextTypeBuilder, ti.VariableName,
typeof(DbSet <>).MakeGenericType(new Type[] { pocoType }), false);
}
_logger.LogTrace("Start building OnConfiguring override method.");
// context OnConfiguring method override.
var onConfiguringMethod = ContextTypeBuilder.OverrideOnConfiguring(cString);
ContextTypeBuilder.DefineMethodOverride(onConfiguringMethod,
typeof(DbContext).GetMethod("OnConfiguring", BindingFlags.Instance | BindingFlags.NonPublic));
Type type = ContextTypeBuilder.CreateType();
if (_config.SaveLibraryRunTime)
{
_logger.LogTrace("Try saving the created DbContext into the disk.");
_typeBuilder.SaveTypeBuilder(ContextTypeBuilder, "DynamicDataStore");
}
_logger.LogTrace("Done building Dynamic DbContext.");
return(type);
}
public ConstructorBuilder(System.Reflection.Emit.ConstructorBuilder builder)
{
_builder = builder;
IL = builder.GetILGenerator();
}
[System.Security.SecurityCritical] // auto-generated
private ConstructorBuilder DefineConstructorNoLock(MethodAttributes attributes, CallingConventions callingConvention,
Type[] parameterTypes, Type[][] requiredCustomModifiers, Type[][] optionalCustomModifiers)
{
CheckContext(parameterTypes);
CheckContext(requiredCustomModifiers);
CheckContext(optionalCustomModifiers);
ThrowIfCreated();
String name;
if ((attributes & MethodAttributes.Static) == 0)
{
name = ConstructorInfo.ConstructorName;
}
else
{
name = ConstructorInfo.TypeConstructorName;
}
attributes = attributes | MethodAttributes.SpecialName;
ConstructorBuilder constBuilder =
new ConstructorBuilder(name, attributes, callingConvention,
parameterTypes, requiredCustomModifiers, optionalCustomModifiers, m_module, this);
m_constructorCount++;
return constBuilder;
}
private void GenerateStaticGet(TypeBuilder t, ConstructorBuilder ctor)
{
MethodBuilder mb = t.DefineMethod("Get",
MethodAttributes.Public | MethodAttributes.Static | MethodAttributes.HideBySig,
ctor.DeclaringType, new Type[] { typeof(Int32) });
ILGenerator gen = mb.GetILGenerator();
Label l1 = gen.DefineLabel();
gen.DeclareLocal(ctor.DeclaringType);
gen.Emit(OpCodes.Nop);
gen.Emit(OpCodes.Ldarg_0);
gen.Emit(OpCodes.Newobj, ctor);
gen.Emit(OpCodes.Stloc_0);
gen.Emit(OpCodes.Br_S, l1);
gen.MarkLabel(l1);
gen.Emit(OpCodes.Ldloc_0);
gen.Emit(OpCodes.Ret);
}
private void GenerateStaticGetList(TypeBuilder t, ConstructorBuilder ctor)
{
Type tt = ctor.DeclaringType.MakeArrayType();
MethodInfo mi = typeof(DalUtility).GetMethod("GetList",
BindingFlags.Static |
BindingFlags.Public);
MethodInfo genericMi = mi.MakeGenericMethod(new Type[] { ctor.DeclaringType });
MethodBuilder mb = t.DefineMethod("GetList",
MethodAttributes.Public | MethodAttributes.Static | MethodAttributes.HideBySig,
tt, Type.EmptyTypes);
ILGenerator gen = mb.GetILGenerator();
gen.DeclareLocal(tt);
Label l1 = gen.DefineLabel();
gen.Emit(OpCodes.Nop);
gen.Emit(OpCodes.Call, genericMi);
gen.Emit(OpCodes.Stloc_0);
gen.Emit(OpCodes.Br_S, l1);
gen.MarkLabel(l1);
gen.Emit(OpCodes.Ldloc_0);
gen.Emit(OpCodes.Ret);
}
/// <summary>
/// Creates a new <see cref="ILEmitter"/> for a given <see cref="ConstructorBuilder"/>.
/// </summary>
/// <param name="constructorBuilder">The <see cref="ConstructorBuilder"/> to emit to.</param>
public ILEmitter(ConstructorBuilder/*!*/ constructorBuilder)
: this(constructorBuilder.GetILGenerator(), Containers.ConstructorBuilder)
{
this.method = constructorBuilder;
}
/// <summary>
/// Generate the declaration for the IgnoresAccessChecksToAttribute type.
/// This attribute will be both defined and used in the dynamic assembly.
/// Each usage identifies the name of the assembly containing non-public
/// types the dynamic assembly needs to access. Normally those types
/// would be inaccessible, but this attribute allows them to be visible.
/// It works like a reverse InternalsVisibleToAttribute.
/// This method returns the ConstructorInfo of the generated attribute.
/// </summary>
public static ConstructorInfo AddToModule(ModuleBuilder mb)
{
TypeBuilder attributeTypeBuilder =
mb.DefineType("System.Runtime.CompilerServices.IgnoresAccessChecksToAttribute",
TypeAttributes.Public | TypeAttributes.Class,
typeof(Attribute));
// Create backing field as:
// private string assemblyName;
FieldBuilder assemblyNameField =
attributeTypeBuilder.DefineField("assemblyName", typeof(string), FieldAttributes.Private);
// Create ctor as:
// public IgnoresAccessChecksToAttribute(string)
ConstructorBuilder constructorBuilder = attributeTypeBuilder.DefineConstructor(MethodAttributes.Public,
CallingConventions.HasThis,
new Type[] { assemblyNameField.FieldType });
ILGenerator il = constructorBuilder.GetILGenerator();
// Create ctor body as:
// this.assemblyName = {ctor parameter 0}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldarg, 1);
il.Emit(OpCodes.Stfld, assemblyNameField);
// return
il.Emit(OpCodes.Ret);
// Define property as:
// public string AssemblyName {get { return this.assemblyName; } }
_ = attributeTypeBuilder.DefineProperty(
"AssemblyName",
PropertyAttributes.None,
CallingConventions.HasThis,
returnType: typeof(string),
parameterTypes: null);
MethodBuilder getterMethodBuilder = attributeTypeBuilder.DefineMethod(
"get_AssemblyName",
MethodAttributes.Public,
CallingConventions.HasThis,
returnType: typeof(string),
parameterTypes: null);
// Generate body:
// return this.assemblyName;
il = getterMethodBuilder.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, assemblyNameField);
il.Emit(OpCodes.Ret);
// Generate the AttributeUsage attribute for this attribute type:
// [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
TypeInfo attributeUsageTypeInfo = typeof(AttributeUsageAttribute).GetTypeInfo();
// Find the ctor that takes only AttributeTargets
ConstructorInfo attributeUsageConstructorInfo =
attributeUsageTypeInfo.DeclaredConstructors
.Single(c => c.GetParameters().Length == 1 &&
c.GetParameters()[0].ParameterType == typeof(AttributeTargets));
// Find the property to set AllowMultiple
PropertyInfo allowMultipleProperty =
attributeUsageTypeInfo.DeclaredProperties
.Single(f => string.Equals(f.Name, "AllowMultiple"));
// Create a builder to construct the instance via the ctor and property
CustomAttributeBuilder customAttributeBuilder =
new CustomAttributeBuilder(attributeUsageConstructorInfo,
new object[] { AttributeTargets.Assembly },
new PropertyInfo[] { allowMultipleProperty },
new object[] { true });
// Attach this attribute instance to the newly defined attribute type
attributeTypeBuilder.SetCustomAttribute(customAttributeBuilder);
// Make the TypeInfo real so the constructor can be used.
return(attributeTypeBuilder.CreateTypeInfo() !.DeclaredConstructors.Single());
}