/// <summary>
/// 定义一个动态方法。
/// </summary>
/// <typeparam name="TDelegate">委托类型</typeparam>
/// <param name="callback">方法生成器回调</param>
/// <param name="restrictedSkipVisibility">是否跳过验证</param>
/// <returns>返回一个委托</returns>
public static TDelegate DefineDynamicMethod <TDelegate>(Action <DynamicMethod, ILGenerator> callback, bool restrictedSkipVisibility = false) where TDelegate : Delegate
{
MethodHelper.GetParametersTypes(typeof(TDelegate), out var parameterTypes, out var returnType);
var dynamicMethod = new DynamicMethod(
$"{nameof(DynamicAssembly)}_{nameof(DynamicMethod)}_{Guid.NewGuid().ToString("N")}",
returnType,
parameterTypes,
restrictedSkipVisibility
);
callback(dynamicMethod, dynamicMethod.GetILGenerator());
return(MethodHelper.CreateDelegate <TDelegate>(dynamicMethod));
}
public static IEnumerable <Func <Type, object> > GetAllocateMethods()
{
{
if (TypeHelper.GetTypeForAllAssembly("System.RuntimeTypeHandle")?.GetMethod("Allocate", Flags) is MethodInfo methodInfo)
{
MethodHelper.GetParametersTypes(methodInfo, out var parameterTypes, out var returnType);
if (returnType == typeof(object) && parameterTypes.Length == 1 && parameterTypes[0].IsInstanceOfType(typeof(object)))
{
yield return(MethodHelper.CreateDelegate <Func <Type, object> >(methodInfo, false));
}
}
}
{
if (TypeHelper.GetTypeForAllAssembly("System.StubHelpers.StubHelpers")?.GetMethod("AllocateInternal", Flags) is MethodInfo methodInfo)
{
MethodHelper.GetParametersTypes(methodInfo, out var parameterTypes, out var returnType);
if (returnType == typeof(object) && parameterTypes.Length == 1 && parameterTypes[0].IsInstanceOfType(typeof(object)))
{
yield return(MethodHelper.CreateDelegate <Func <Type, object> >(methodInfo, false));
}
}
}
{
if (TypeHelper.GetTypeForAllAssembly("System.Runtime.Remoting.Activation.ActivationServices")?.GetMethod("AllocateUninitializedClassInstance", Flags) is MethodInfo methodInfo)
{
MethodHelper.GetParametersTypes(methodInfo, out var parameterTypes, out var returnType);
if (returnType == typeof(object) && parameterTypes.Length == 1 && parameterTypes[0].IsInstanceOfType(typeof(object)))
{
yield return(MethodHelper.CreateDelegate <Func <Type, object> >(methodInfo, false));
}
if (returnType == typeof(object) && parameterTypes.Length == 1 && parameterTypes[0] == typeof(IntPtr))
{
var internalFunc = MethodHelper.CreateDelegate <Func <IntPtr, object> >(methodInfo, false);
yield return((type) => internalFunc(type.TypeHandle.Value));
}
}
}
}