different feedback

Author: pavelsavara

src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Marshal.cs

@@ -1139,6 +1139,9 @@ public static TDelegate GetDelegateForFunctionPointer<TDelegate>(IntPtr ptr)
         [EditorBrowsable(EditorBrowsableState.Never)]
         public static IntPtr GetFunctionPointerForDelegate(Delegate d)
         {
+#if TARGET_BROWSER || TARGET_WASI
+            if (OperatingSystem.IsWasi() || OperatingSystem.IsBrowser()) throw new PlatformNotSupportedException(SR.PlatformNotSupported_DynamicEntrypoint);
+#endif
             ArgumentNullException.ThrowIfNull(d);
 
             return GetFunctionPointerForDelegateInternal(d);

src/mono/wasm/Wasm.Build.Tests/MiscTests.cs

@@ -32,6 +32,6 @@ public async Task TestGetFunctionPointerForDelegate()
 
         Assert.Equal(2, result.TestOutput.Count);
         Assert.Contains(result.TestOutput, m => m.Contains("System.PlatformNotSupportedException"));
-        Assert.Contains(result.TestOutput, m => m.Contains("No native to managed transition for method '(wrapper native-to-managed) void MiscTests/<>c:<TestGetFunctionPointerForDelegate>b__0_0 ()', missing [UnmanagedCallersOnly] attribute."));
+        Assert.Contains(result.TestOutput, m => m.Contains("Dynamic entrypoint allocation is not supported in the current environment."));
     }
 }