118 lines
4.5 KiB
Java
118 lines
4.5 KiB
Java
/*
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* Copyright (c) 2021, 2023, 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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/*
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* @test
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* @bug 8225056
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* @library /test/lib
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* @summary Test that a class that is a sealed class can be redefined.
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* @modules java.base/jdk.internal.misc
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* @modules java.instrument
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* @requires vm.jvmti
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* @requires vm.flagless
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* @compile RedefineSealedClass.java
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* @run driver RedefineSealedClass buildagent
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* @run driver/timeout=6000 RedefineSealedClass runtest
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*/
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import java.io.FileNotFoundException;
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import java.io.PrintWriter;
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import java.lang.RuntimeException;
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import java.lang.instrument.ClassFileTransformer;
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import java.lang.instrument.Instrumentation;
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import java.lang.instrument.IllegalClassFormatException;
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import java.security.ProtectionDomain;
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import java.util.spi.ToolProvider;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.helpers.ClassFileInstaller;
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public class RedefineSealedClass {
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private static final ToolProvider JAR = ToolProvider.findFirst("jar")
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.orElseThrow(() -> new RuntimeException("ToolProvider for jar not found"));
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final class A extends Tester { }
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final class B extends Tester { }
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sealed static class Tester permits A, B {}
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static class LoggingTransformer implements ClassFileTransformer {
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public LoggingTransformer() {}
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public byte[] transform(ClassLoader loader, String className,
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Class classBeingRedefined, ProtectionDomain protectionDomain,
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byte[] classfileBuffer) throws IllegalClassFormatException {
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return null;
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}
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}
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public static void premain(String agentArgs, Instrumentation inst) throws Exception {
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LoggingTransformer t = new LoggingTransformer();
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inst.addTransformer(t, true);
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{
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Class demoClass = Class.forName("RedefineSealedClass$Tester");
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inst.retransformClasses(demoClass);
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}
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}
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private static void buildAgent() {
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try {
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ClassFileInstaller.main("RedefineSealedClass");
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} catch (Exception e) {
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throw new RuntimeException("Could not write agent classfile", e);
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}
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try {
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PrintWriter pw = new PrintWriter("MANIFEST.MF");
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pw.println("Premain-Class: RedefineSealedClass");
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pw.println("Agent-Class: RedefineSealedClass");
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pw.println("Can-Redefine-Classes: true");
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pw.println("Can-Retransform-Classes: true");
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pw.close();
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} catch (FileNotFoundException e) {
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throw new RuntimeException("Could not write manifest file for the agent", e);
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}
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if (JAR.run(System.out, System.err, "-cmf", "MANIFEST.MF", "redefineagent.jar", "RedefineSealedClass.class") != 0) {
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throw new RuntimeException("Could not write the agent jar file");
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}
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}
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public static void main(String argv[]) throws Exception {
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if (argv.length == 1 && argv[0].equals("buildagent")) {
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buildAgent();
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return;
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}
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if (argv.length == 1 && argv[0].equals("runtest")) {
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String[] javaArgs1 = { "-XX:MetaspaceSize=12m", "-XX:MaxMetaspaceSize=12m",
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"-javaagent:redefineagent.jar", "RedefineSealedClass"};
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(javaArgs1);
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldNotContain("processing of -javaagent failed");
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output.shouldHaveExitValue(0);
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}
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}
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}
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