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JDK-8268980: [lword] Fix Class::descriptorString to return L-descriptor for primitive ref type #451

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@@ -4518,7 +4518,7 @@ public String descriptorString() {
if (isArray()) {
return "[" + componentType.descriptorString();
char typeDesc = isPrimitiveClass() ? 'Q' : 'L';
char typeDesc = isValueType() ? 'Q' : 'L';
if (isHidden()) {
String name = getName();
int index = name.indexOf('/');
@@ -130,6 +130,9 @@ public void testMirrors() {

assertEquals(valType.getTypeName(), "BasicTest$Point");
assertEquals(refType.getTypeName(), "BasicTest$Point.ref");

assertEquals(valType.descriptorString(), "QBasicTest$Point;");
assertEquals(refType.descriptorString(), "LBasicTest$Point;");

@@ -0,0 +1,46 @@
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit if you need additional information or have any
* questions.

* @test
* @run main MethodReference
* @summary test method reference and primitive reference type as the parameter type

import java.util.function.Supplier;

public primitive class MethodReference {
final int x;
final int y;
MethodReference() {
this.x = 1234;
this.y = 5678;

public static void main(String... args) {
Supplier<MethodReference.ref> supplier = MethodReference::new;
MethodReference o = (MethodReference) supplier.get();
if (o.x != 1234 || o.y != 5678)
throw new AssertionError(o);