Throw IdentityException in monitorenter

...if class is value type

Signed-off-by: Theresa Mammarella <[email protected]>

Author: theresa-m

runtime/oti/vmconstantpool.xml

@@ -23,6 +23,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-ex
 <vmconstantpool>
 	<classref name="java/lang/ArrayStoreException"/>
 	<classref name="java/lang/ClassCastException"/>
+	<classref name="java/lang/IdentityException" flags="opt_valhallaValueTypes"/>
 	<classref name="java/lang/IllegalMonitorStateException"/>
 	<classref name="java/lang/IndexOutOfBoundsException"/>
 	<classref name="java/lang/NegativeArraySizeException"/>

runtime/vm/BytecodeInterpreter.hpp

@@ -11224,7 +11224,7 @@ arrayIndex: {
 #define badClassName J9ROMCLASS_CLASSNAME(J9OBJECT_CLAZZ(_currentThread, (j9object_t)_currentThread->tempSlot)->romClass)
 #if defined(J9VM_OPT_VALHALLA_VALUE_TYPES)
 	if (J9_IS_J9CLASS_VALUETYPE(J9OBJECT_CLAZZ(_currentThread, (j9object_t)_currentThread->tempSlot))) {
-		setCurrentExceptionNLSWithArgs(_currentThread, J9NLS_VM_ERROR_BYTECODE_OBJECTREF_CANNOT_BE_VALUE_TYPE, J9VMCONSTANTPOOL_JAVALANGILLEGALMONITORSTATEEXCEPTION, J9UTF8_LENGTH(badClassName), J9UTF8_DATA(badClassName));
+		setCurrentExceptionNLSWithArgs(_currentThread, J9NLS_VM_ERROR_BYTECODE_OBJECTREF_CANNOT_BE_VALUE_TYPE, J9VMCONSTANTPOOL_JAVALANGIDENTITYEXCEPTION, J9UTF8_LENGTH(badClassName), J9UTF8_DATA(badClassName));
 	} else
 #endif /* defined(J9VM_OPT_VALHALLA_VALUE_TYPES) */
 	{

test/functional/Valhalla/src_qtypes/org/openj9/test/lworld/ValueTypeTests.java

@@ -990,7 +990,7 @@ static public void testMonitorEnterAndExitOnValueType() throws Throwable {
 		try {
 			monitorEnterAndExitOnValueType.invoke(valueType);
 			Assert.fail("should throw exception. MonitorExit cannot be used with ValueType");
-		} catch (IllegalMonitorStateException e) {}
+		} catch (IdentityException e) {}
 
 		try {
 			monitorEnterAndExitOnValueType.invoke(valueTypeArray);