russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
88 lines
3.1 KiB
Java
88 lines
3.1 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.lang.invoke.MethodHandles;
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public class CommandLineTestHelper {
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/**
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* The argument is a list of names of no-arg static methods in this class to invoke.
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* The names are separated with a '+'.
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*/
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public static void main(String[] args) throws Exception {
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String[] methodNames = args.length > 0 ? args[0].split("\\+") : new String[0];
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for (String methodName : methodNames) {
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Method m = CommandLineTestHelper.class.getDeclaredMethod(methodName);
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m.invoke(null);
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}
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}
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static void testFieldSetInt() throws Exception {
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class C {
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final int value;
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C(int value) {
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this.value = value;
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}
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}
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Field f = C.class.getDeclaredField("value");
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f.setAccessible(true);
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var obj = new C(100);
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f.setInt(obj, 200);
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if (obj.value != 200) {
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throw new RuntimeException("Unexpected value: " + obj.value);
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}
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}
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static void testUnreflectSetter() throws Throwable {
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class C {
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final int value;
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C(int value) {
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this.value = value;
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}
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}
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Field f = C.class.getDeclaredField("value");
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f.setAccessible(true);
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var obj = new C(100);
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MethodHandles.lookup().unreflectSetter(f).invoke(obj, 200);
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if (obj.value != 200) {
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throw new RuntimeException("Unexpected value: " + obj.value);
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}
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}
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/**
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* Set the internal system property that corresponds to the first usage of
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* --enable-final-field-mutation.
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*/
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static void setPropertyEnableFinalFieldMutationAllUnnamed() {
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System.setProperty("jdk.module.enable.final.field.mutation.0", "ALL-UNNAMED");
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}
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/**
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* Set the internal system property that corresponds to --illegal-final-field-mutation.
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*/
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static void setPropertyIllegalFinalFieldMutationAllow() {
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System.setProperty("jdk.module.illegal.final.field.mutation", "allow");
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}
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}
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