test/compiler/jvmci/jdk.vm.ci.runtime.test/src/jdk/vm/ci/runtime/test/TestResolvedJavaType.java

@@ -52,10 +52,11 @@
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.function.Supplier;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 

@@ -141,10 +142,31 @@
             assertEquals(expected, actual);
         }
     }
 
     @Test
+    public void getHostClassTest() {
+        for (Class<?> c : classes) {
+            ResolvedJavaType type = metaAccess.lookupJavaType(c);
+            ResolvedJavaType host = type.getHostClass();
+            assertNull(host);
+        }
+
+        class LocalClass {}
+        Cloneable clone = new Cloneable() {};
+        assertNull(metaAccess.lookupJavaType(LocalClass.class).getHostClass());
+        assertNull(metaAccess.lookupJavaType(clone.getClass()).getHostClass());
+
+        Supplier<Runnable> lambda = () -> () -> System.out.println("run");
+        ResolvedJavaType lambdaType = metaAccess.lookupJavaType(lambda.getClass());
+        ResolvedJavaType nestedLambdaType = metaAccess.lookupJavaType(lambda.get().getClass());
+        assertNotNull(lambdaType.getHostClass());
+        assertNotNull(nestedLambdaType.getHostClass());
+        assertEquals(lambdaType.getHostClass(), nestedLambdaType.getHostClass());
+    }
+
+    @Test
     public void getModifiersTest() {
         for (Class<?> c : classes) {
             ResolvedJavaType type = metaAccess.lookupJavaType(c);
             int mask = Modifier.classModifiers() & ~Modifier.STATIC;
             int expected = c.getModifiers() & mask;