Add test for VarHandle MethodHandleInfo

Test for eclipse-openj9#3180

This depends on eclipse-openj9#4458

[ci skip]

Signed-off-by: Peter Bain <peter_bain@ca.ibm.com>

test/functional/Java11andUp/playlist.xml

@@ -252,4 +252,28 @@
 			<subset>11+</subset>
 		</subsets>
 	</test>
+	<test>
+		<testCaseName>JCL_TEST_Java-Lang-Invoke</testCaseName>
+		<command>$(JAVA_COMMAND) $(JVM_OPTIONS) \
+			-cp $(Q)$(RESOURCES_DIR)$(P)$(TESTNG)$(P)$(TEST_RESROOT)$(D)GeneralTest.jar$(Q) \
+			org.testng.TestNG -d $(REPORTDIR) $(Q)$(TEST_RESROOT)$(D)testng.xml$(Q) \
+			-testnames JCL_TEST_Java-Lang-Invoke \
+			-groups $(TEST_GROUP) \
+			-excludegroups $(DEFAULT_EXCLUDE); \
+			$(TEST_STATUS)
+		</command>
+		<levels>
+			<level>extended</level>
+		</levels>
+		<groups>
+			<group>functional</group>
+		</groups>
+		<impls>
+			<impl>openj9</impl>
+			<impl>ibm</impl>
+		</impls>
+		<subsets>
+			<subset>11+</subset>
+		</subsets>
+	</test>
 </playlist>

test/functional/Java11andUp/src/org/openj9/test/varhandle/TestVarHandleInfo.java

@@ -0,0 +1,118 @@
+/*******************************************************************************
+ * Copyright (c) 2019, 2019 IBM Corp. and others
+ *
+ * This program and the accompanying materials are made available under
+ * the terms of the Eclipse Public License 2.0 which accompanies this
+ * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
+ * or the Apache License, Version 2.0 which accompanies this distribution and
+ * is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * This Source Code may also be made available under the following
+ * Secondary Licenses when the conditions for such availability set
+ * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
+ * General Public License, version 2 with the GNU Classpath
+ * Exception [1] and GNU General Public License, version 2 with the
+ * OpenJDK Assembly Exception [2].
+ *
+ * [1] https://www.gnu.org/software/classpath/license.html
+ * [2] http://openjdk.java.net/legal/assembly-exception.html
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
+ *******************************************************************************/
+
+package org.openj9.test.varhandle;
+
+import static org.testng.AssertJUnit.assertEquals;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandleInfo;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.reflect.Modifier;
+import java.lang.invoke.MethodType;
+import java.lang.invoke.VarHandle;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.testng.annotations.BeforeSuite;
+import org.testng.annotations.Test;
+import org.testng.log4testng.Logger;
+
+@Test(groups = { "level.extended" })
+public class TestVarHandleInfo {
+
+	protected static Logger logger = Logger.getLogger(TestVarHandleInfo.class);
+	private static final int MODIFIER_SYNTHETIC = 0x01000; /* see Table 5.5-a of the Java 8 VM spec */
+	/* the JVM adds the SYNTHETIC modifier automatically */
+	private static final int expectedModifiers = 
+			Modifier.PUBLIC + Modifier.FINAL + Modifier.NATIVE 
+			+ MODIFIER_SYNTHETIC;
+	private static final String EXPECTED_MODIFIERS_STRING = Modifier.toString(expectedModifiers);
+	private static final int expectedReferenceKind = MethodHandleInfo.REF_invokeVirtual;
+
+	Lookup 	mylookup = MethodHandles.lookup();
+	Integer instanceField; /* the target of the varhandle */
+	List<String> accessModes;
+	HashMap<String, MethodType> infos;
+
+	@Test
+	public void testAccessModes() throws NoSuchFieldException, IllegalAccessException {
+		/* grab a VarHahnlde purely to check the accessModeType */
+		VarHandle vh = mylookup.findVarHandle(TestVarHandleInfo.class, "instanceField", Integer.class); //$NON-NLS-1$
+		for (String methName : accessModes) {
+			logger.debug(methName);
+			VarHandle.AccessMode am = VarHandle.AccessMode.valueFromMethodName(methName);
+
+			MethodHandle mh = MethodHandles.varHandleExactInvoker(am, vh.accessModeType(am));
+			checkMethodHandleInfo(mylookup.revealDirect(mh), infos.get(methName), methName);
+
+			mh = MethodHandles.varHandleInvoker(am, vh.accessModeType(am));
+			checkMethodHandleInfo(mylookup.revealDirect(mh), infos.get(methName), methName);
+		}
+	}
+
+	private static void checkMethodHandleInfo(MethodHandleInfo info, MethodType expectedMethodType,
+			String expectedMethodName) {
+		assertEquals("Incorrect declaring class", VarHandle.class, info.getDeclaringClass()); //$NON-NLS-1$
+
+		assertEquals("Incorrect methodType", expectedMethodType, info.getMethodType()); //$NON-NLS-1$
+
+		int actualModifiers = info.getModifiers();
+		assertEquals("Missing modifiers: expected \"" + EXPECTED_MODIFIERS_STRING //$NON-NLS-1$
+				+ "\" (" + Integer.toHexString(expectedModifiers) //$NON-NLS-1$
+				+ "), actual \"" + Modifier.toString(actualModifiers) //$NON-NLS-1$
+				+ "\" (" + Integer.toHexString(actualModifiers) + ")", //$NON-NLS-1$ //$NON-NLS-2$
+				expectedModifiers, actualModifiers);
+
+		assertEquals("Incorrect name ", expectedMethodName, info.getName()); //$NON-NLS-1$
+
+		assertEquals("Incorrect reference kind, expected " //$NON-NLS-1$
+				+ MethodHandleInfo.referenceKindToString(expectedReferenceKind), expectedReferenceKind,
+				info.getReferenceKind());
+	}
+
+	@BeforeSuite
+	public void makeInfos() {
+		infos = new HashMap<>();
+		accessModes = Arrays.asList(VarHandle.AccessMode.values())
+				.stream()
+				.map(m -> m.methodName())
+				.collect(Collectors.toList());
+
+		MethodType mtInt = MethodType.methodType(Integer.class, TestVarHandleInfo.class);
+		accessModes.stream().filter(m -> m.contains("get")).forEach(s -> infos.put(s, mtInt)); //$NON-NLS-1$
+
+		MethodType mtIntVoid = MethodType.methodType(void.class, TestVarHandleInfo.class, Integer.class);
+		accessModes.stream().filter(m -> m.contains("set")).forEach(s -> infos.put(s, mtIntVoid)); //$NON-NLS-1$
+
+		MethodType mtIntIntBool = MethodType.methodType(boolean.class, TestVarHandleInfo.class, Integer.class, Integer.class);
+		accessModes.stream().filter(m -> m.contains("ompareAndSet")).forEach(s -> infos.put(s, mtIntIntBool)); /* omit leading character as it may be upper or lower case */ //$NON-NLS-1$
+
+		MethodType mtIntIntInt = MethodType.methodType(Integer.class, TestVarHandleInfo.class, Integer.class, Integer.class);
+		accessModes.stream().filter(m -> m.contains("ompareAndExchange")).forEach(s -> infos.put(s, mtIntIntInt)); /* omit leading character as it may be upper or lower case */ //$NON-NLS-1$		
+
+		MethodType mtIntInt = MethodType.methodType(Integer.class, TestVarHandleInfo.class, Integer.class);
+		accessModes.stream().filter(m -> m.contains("getAnd")).forEach(s -> infos.put(s, mtIntInt)); /* ...set, add, etc. */ //$NON-NLS-1$					
+	}
+}

test/functional/Java11andUp/testng.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
-  Copyright (c) 2018, 2018 IBM Corp. and others
+  Copyright (c) 2018, 2019 IBM Corp. and others
 
   This program and the accompanying materials are made available under
   the terms of the Eclipse Public License 2.0 which accompanies this
@@ -55,4 +55,9 @@
 			<class name="org.openj9.test.nestmates.NestAttributeTest" />
 		</classes>
 	</test>
+	<test name="JCL_TEST_Java-Lang-Invoke">
+		<classes>
+			<class name="org.openj9.test.varhandle.TestVarHandleInfo"/>
+		</classes>
+	</test>
 </suite>