Check if the marshalling of a field is possible across all platforms. (#53194)

* Check if the marshalling of a field is possible across all platforms.

* Add test for the generic field generation for IClassX.

2 files changed, 10 insertions, 1 deletions

diff --git a/src/coreclr/vm/comtoclrcall.cpp b/src/coreclr/vm/comtoclrcall.cpp
index 30c5dc3bd9d..ca553e1e5ce 100644
--- a/src/coreclr/vm/comtoclrcall.cpp
+++ b/src/coreclr/vm/comtoclrcall.cpp
@@ -1013,7 +1013,6 @@ void ComCallMethodDesc::InitNativeInfo()
                 CONSISTENCY_CHECK_MSGF(false, ("BreakOnComToClrNativeInfoInit: '%s' ", szDebugName));
 #endif // _DEBUG
 
-#ifdef TARGET_X86
             MetaSig fsig(pFD);
             fsig.NextArg();
 
@@ -1030,6 +1029,10 @@ void ComCallMethodDesc::InitNativeInfo()
 #endif
                              );
 
+            if (info.GetMarshalType() == MarshalInfo::MARSHAL_TYPE_UNKNOWN)
+                info.ThrowTypeLoadExceptionForInvalidFieldMarshal(pFD, info.GetErrorResourceId());
+
+#ifdef TARGET_X86
             if (IsFieldGetter())
             {
                 // getter takes 'this' and the output argument by-ref
diff --git a/src/coreclr/vm/mlinfo.h b/src/coreclr/vm/mlinfo.h
index 68546b167c2..81fe67fdc2e 100644
--- a/src/coreclr/vm/mlinfo.h
+++ b/src/coreclr/vm/mlinfo.h
@@ -480,6 +480,12 @@ public:
         return m_ms == MarshalInfo::MARSHAL_SCENARIO_FIELD;
     }
 
+    UINT GetErrorResourceId()
+    {
+        LIMITED_METHOD_CONTRACT;
+        return m_resID;
+    }
+
 private:
 
     UINT16                      GetNativeSize(MarshalType mtype);