From 126b8fa3cedaa8c13541f6ea4fdcf95f97316237 Mon Sep 17 00:00:00 2001
From: Vlad Brezae <brezaevlad@gmail.com>
Date: Wed, 17 Aug 2022 05:00:11 +0300
Subject: [PATCH] [mono] Implement missing functionality for cctor invocation
 (#73955)

* [mono] Implement missing functionality for cctor invocation

* [mono] Re-enable test
---
 .../System.Reflection/tests/ConstructorInfoTests.cs  |  1 -
 .../src/System/Reflection/RuntimeMethodInfo.Mono.cs  |  9 ++++++---
 src/mono/mono/metadata/icall-def.h                   |  1 +
 src/mono/mono/metadata/icall.c                       | 12 ++++++++++++
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/libraries/System.Reflection/tests/ConstructorInfoTests.cs b/src/libraries/System.Reflection/tests/ConstructorInfoTests.cs
index e6d59b787cc56..5e41d80f197c4 100644
--- a/src/libraries/System.Reflection/tests/ConstructorInfoTests.cs
+++ b/src/libraries/System.Reflection/tests/ConstructorInfoTests.cs
@@ -69,7 +69,6 @@ public void Invoke_StaticConstructor_NullObject_NullParameters()
         }
 
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsInvokingStaticConstructorsSupported))]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/40351", TestRuntimes.Mono)]
         public void Invoke_StaticConstructorMultipleTimes()
         {
             ConstructorInfo[] constructors = GetConstructors(typeof(ClassWithStaticConstructorThatIsCalledMultipleTimesViaReflection));
diff --git a/src/mono/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.Mono.cs b/src/mono/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.Mono.cs
index 146739163199b..08f30f04fca82 100644
--- a/src/mono/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.Mono.cs
+++ b/src/mono/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.Mono.cs
@@ -802,10 +802,13 @@ internal RuntimeType[] ArgumentTypes
             }
         }
 
-        private static void InvokeClassConstructor()
+        [MethodImplAttribute(MethodImplOptions.InternalCall)]
+        internal static extern void InvokeClassConstructor(QCallTypeHandle type);
+
+        private void InvokeClassConstructor()
         {
-            // [TODO] Mechanism for invoking class constructor
-            // See https://github.com/dotnet/runtime/issues/40351
+            RuntimeType type = (RuntimeType)DeclaringType;
+            InvokeClassConstructor(new QCallTypeHandle(ref type));
         }
 
         /*
diff --git a/src/mono/mono/metadata/icall-def.h b/src/mono/mono/metadata/icall-def.h
index 5f47166ab1a64..073590ef5a9f1 100644
--- a/src/mono/mono/metadata/icall-def.h
+++ b/src/mono/mono/metadata/icall-def.h
@@ -357,6 +357,7 @@ HANDLES(RASSEM_7, "InternalGetReferencedAssemblies", ves_icall_System_Reflection
 ICALL_TYPE(MCMETH, "System.Reflection.RuntimeConstructorInfo", MCMETH_1)
 HANDLES(MCMETH_1, "GetGenericMethodDefinition_impl", ves_icall_RuntimeMethodInfo_GetGenericMethodDefinition, MonoReflectionMethod, 1, (MonoReflectionMethod))
 HANDLES(MCMETH_2, "InternalInvoke", ves_icall_InternalInvoke, MonoObject, 4, (MonoReflectionMethod, MonoObject, MonoSpanOfObjects_ref, MonoExceptionOut))
+HANDLES(MCMETH_5, "InvokeClassConstructor", ves_icall_InvokeClassConstructor, void, 1, (MonoQCallTypeHandle))
 HANDLES_REUSE_WRAPPER(MCMETH_4, "get_metadata_token", ves_icall_reflection_get_token)
 
 ICALL_TYPE(CATTR_DATA, "System.Reflection.RuntimeCustomAttributeData", CATTR_DATA_1)
diff --git a/src/mono/mono/metadata/icall.c b/src/mono/mono/metadata/icall.c
index 2fbdb8f330fe7..df14926eb572f 100644
--- a/src/mono/mono/metadata/icall.c
+++ b/src/mono/mono/metadata/icall.c
@@ -2809,6 +2809,18 @@ ves_icall_RuntimeTypeHandle_IsComObject (MonoQCallTypeHandle type_handle, MonoEr
 	return mono_class_is_com_object (klass);
 }
 
+void
+ves_icall_InvokeClassConstructor (MonoQCallTypeHandle type_handle, MonoError *error)
+{
+	MonoType *type = type_handle.type;
+	MonoClass *klass = mono_class_from_mono_type_internal (type);
+
+	MonoVTable *vtable = mono_class_vtable_checked (klass, error);
+	return_if_nok (error);
+
+	mono_runtime_class_init_full (vtable, error);
+}
+
 guint32
 ves_icall_reflection_get_token (MonoObjectHandle obj, MonoError *error)
 {