Merge branch 'master' into docs-fixes

Tests/Kernels/Cosmos.Compiler.Tests.Bcl.System/Kernel.cs

@@ -40,6 +40,7 @@ protected override void Run()
                 ConvertTests.Execute();
                 DateTimeTests.Execute();
                 TimeSpanTests.Execute();
+                ActivatorTests.Execute();
 
                 int count = Heap.Collect();
                 mDebugger.Send("Free");

Tests/Kernels/Cosmos.Compiler.Tests.Bcl.System/System/ActivatorTests.cs

@@ -0,0 +1,100 @@
+using System;
+using Cosmos.TestRunner;
+
+namespace Cosmos.Compiler.Tests.Bcl.System
+{
+    class ActivatorTests
+    {
+        public static unsafe void Execute()
+        {
+            // Till this moment (04/09/2024) the constructors, as any other method, are not included on the compilation result if never called,
+            // so we need to call them before.
+            Artesa dummy = new Artesa();
+            WrappedLogger dummy2 = new WrappedLogger();
+            ConsoleLogger dummy3 = new ConsoleLogger();
+
+
+            // Generic method test
+            ILogger logger = GetLogger<ConsoleLogger>();
+            // Null checks are just for clarification, a ctor would throw if the object/struct was null.
+            Assert.IsTrue(logger is not null, "Object incorrectly set.");
+            Assert.IsTrue(typeof(ConsoleLogger).Equals(logger.GetType()), "Type Incorrectly set");
+            logger.Log("Interface method Call works!");
+
+            // Generic method test (with different type)
+            logger = GetLogger<WrappedLogger>();
+            Assert.IsTrue(logger is not null, "Object incorrectly set.");
+            Assert.IsTrue(typeof(WrappedLogger).Equals(logger.GetType()), "Type Incorrectly set");
+            logger.Log("Interface method call really really works!");
+            ((WrappedLogger)logger).Logger.Log("property get works!");
+            ((WrappedLogger)logger).Success("Type's specific methods work too.");
+
+            // Struct Test
+            var artesa = Activator.CreateInstance(typeof(Artesa));
+            Assert.IsTrue(artesa is not null, "Struct incorrectly set.");
+            Assert.IsTrue(typeof(Artesa).Equals(artesa.GetType()), "Type Incorrectly set");
+
+            // Unboxing
+            Artesa art = (Artesa)artesa;
+            Assert.IsTrue(typeof(Artesa).Equals(art.GetType()), "Type Incorrectly set");
+
+            // Check property
+            Assert.IsTrue(art.Name is not null, "Property not set");
+
+            // Test method overrides
+            Assert.IsTrue(art.ToString() == $"{art.Name}-{art.LastName}", "Property not set");
+        }
+
+        public static T GetLogger<T>() where T : ILogger, new()
+        {
+            return new T();
+        }
+    }
+
+    struct Artesa
+    {
+        public Artesa()
+        {
+            Console.WriteLine("LOL");
+            Name = "Artesa";
+            LastName = "Apple";
+        }
+        public string Name { get; }
+        public string LastName { get; }
+
+        public override string ToString()
+        {
+            return $"{Name}-{LastName}";
+        }
+    }
+
+    class WrappedLogger : ILogger
+    {
+        private ILogger logger;
+
+        public WrappedLogger() : this(ActivatorTests.GetLogger<ConsoleLogger>())
+        {
+
+        }
+
+        public WrappedLogger(ILogger logger)
+        {
+            this.logger = logger;
+        }
+
+        internal ILogger Logger => logger;
+
+        public void Log(string message) => logger.Log(message);
+        public void Success(string message) => Assert.Succeed(message);
+    }
+
+    class ConsoleLogger : ILogger
+    {
+        public void Log(string message) => Console.WriteLine(message);
+    }
+
+    interface ILogger
+    {
+        void Log(string message);
+    }
+}

source/Cosmos.Core_Plugs/System/ActivatorImpl.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Runtime.CompilerServices;
+using Cosmos.Core;
+using IL2CPU.API.Attribs;
+using IL2CPU.API;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+
+namespace Cosmos.Core_Plugs.System
+{
+    [Plug(typeof(global::System.Activator))]
+    public static class ActivatorImpl
+    {
+        public static T CreateInstance<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] T>()
+        {
+            return (T)Activator.CreateInstance(typeof(T))!;
+        }
+
+        // nonPublic is ignored since, at the moment, we cannot know if a ctor is public or not
+        // and we would get a Stack Corruption or Null reference exception if the ctor is not present either way.
+        public unsafe static object CreateInstance(CosmosRuntimeType ctr, bool nonPublic, bool wrapExceptions)
+        {
+            ArgumentNullException.ThrowIfNull(ctr, "Type");
+
+            // get the Type's VTable entry
+            var mType = VTablesImpl.mTypes[ctr.mTypeId];
+
+            // Calculate Object Size
+            uint dSize = 0;
+            if (ctr.IsValueType)
+            {
+                // For value types this property holds the correct size, so we can avoid the iteration
+                dSize = mType.Size;
+            }
+            else
+            {
+                // Calculate Object Actual Size.
+                var gcType = VTablesImpl.gcTypes[ctr.mTypeId];
+                for (int i = 0; i < gcType.GCFieldTypes.Length; i++)
+                {
+                    dSize += VTablesImpl.GetSize(gcType.GCFieldTypes[i]);
+                }
+            }
+
+            // Object Allocation
+            uint ptr = GCImplementation.AllocNewObject(ObjectUtils.FieldDataOffset + dSize);
+
+            // Set Fields
+            var vptr = (uint*)ptr;
+            vptr[0] = ctr.mTypeId; // Type
+            vptr[1] = ptr;         // Address/Handler?
+            vptr[2] = dSize;       // Data Area Size
+
+            object obj = Unsafe.Read<object>(vptr)!;
+            // We make the wild assumption that the ctor is the first method address, this may change on the future if the VTable is reworked.
+            var ctoraddress = mType.MethodAddresses[0];
+
+            try
+            {
+                if (ctr.IsValueType)
+                {
+                    // Struct Ctor Call
+                    var cctor = (delegate*<void*, void>)ctoraddress;
+                    cctor(vptr + 3); // Struct pointer
+                }
+                else
+                {
+                    // Object Ctor Call
+                    var cctor = (delegate*<object, void>)ctoraddress;
+                    cctor(obj);
+                }
+
+                return obj;
+            }
+            catch (Exception inner) when (wrapExceptions)
+            {
+                throw new TargetInvocationException(inner);
+            }
+        }
+    }
+}