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/*
* Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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 www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8260009
* @library /test/lib
* @summary Test that a permitted subclass, that is resolved by its super
class, can be redefined.
* @modules java.base/jdk.internal.misc
* @modules java.instrument
* @requires vm.jvmti
* @requires vm.flagless
* @compile RedefinePermittedSubclass.java
* @run driver RedefinePermittedSubclass buildagent
* @run driver/timeout=6000 RedefinePermittedSubclass runtest
*/
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.lang.RuntimeException;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.Instrumentation;
import java.lang.instrument.IllegalClassFormatException;
import java.security.ProtectionDomain;
import java.util.spi.ToolProvider;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.helpers.ClassFileInstaller;
public class RedefinePermittedSubclass {
private static final ToolProvider JAR = ToolProvider.findFirst("jar")
.orElseThrow(() -> new RuntimeException("ToolProvider for jar not found"));
non-sealed class A extends Tester {
public void printIt() { System.out.println("In A"); }
}
sealed static class Tester permits A {
// Make sure A is resolved in Tester's constant pool.
public void resolveA(A a) {
a.printIt();
}
}
static class LoggingTransformer implements ClassFileTransformer {
public LoggingTransformer() {}
public byte[] transform(ClassLoader loader, String className,
Class classBeingRedefined, ProtectionDomain protectionDomain,
byte[] classfileBuffer) throws IllegalClassFormatException {
return null;
}
}
public static void premain(String agentArgs, Instrumentation inst) throws Exception {
RedefinePermittedSubclass r = new RedefinePermittedSubclass();
r.play(); // Resolve A before redefining it.
LoggingTransformer t = new LoggingTransformer();
inst.addTransformer(t, true);
{
Class demoClassA = Class.forName("RedefinePermittedSubclass$A");
inst.retransformClasses(demoClassA);
}
}
private static void buildAgent() {
try {
ClassFileInstaller.main("RedefinePermittedSubclass");
} catch (Exception e) {
throw new RuntimeException("Could not write agent classfile", e);
}
try {
PrintWriter pw = new PrintWriter("MANIFEST.MF");
pw.println("Premain-Class: RedefinePermittedSubclass");
pw.println("Agent-Class: RedefinePermittedSubclass");
pw.println("Can-Redefine-Classes: true");
pw.println("Can-Retransform-Classes: true");
pw.close();
} catch (FileNotFoundException e) {
throw new RuntimeException("Could not write manifest file for the agent", e);
}
if (JAR.run(System.out, System.err, "-cmf", "MANIFEST.MF", "redefineagent.jar",
"RedefinePermittedSubclass.class") != 0) {
throw new RuntimeException("Could not write the agent jar file");
}
}
public void play () {
A a = new A();
Tester t = new Tester();
t.resolveA(a);
}
public static void main(String argv[]) throws Exception {
RedefinePermittedSubclass r = new RedefinePermittedSubclass();
r.play();
if (argv.length == 1 && argv[0].equals("buildagent")) {
buildAgent();
return;
}
if (argv.length == 1 && argv[0].equals("runtest")) {
String[] javaArgs1 = { "-XX:MetaspaceSize=12m", "-XX:MaxMetaspaceSize=12m",
"-javaagent:redefineagent.jar", "RedefinePermittedSubclass"};
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(javaArgs1);
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldNotContain("processing of -javaagent failed");
output.shouldHaveExitValue(0);
}
}
}
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