139 lines
4.7 KiB
Java
139 lines
4.7 KiB
Java
/*
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* Copyright (c) 2016, 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 8165246 8010319
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* @summary Test clean_previous_versions flag and processing during class unloading.
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* @requires vm.jvmti
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* @requires vm.opt.final.ClassUnloading
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* @requires vm.flagless
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* @modules java.compiler
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* java.instrument
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* jdk.jartool/sun.tools.jar
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* @run driver RedefineClassHelper
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* @run driver RedefinePreviousVersions test
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*/
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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// package access top-level classes to avoid problem with RedefineClassHelper
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// and nested types.
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class RedefinePreviousVersions_B { }
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class RedefinePreviousVersions_Running {
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public static volatile boolean stop = false;
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public static volatile boolean running = false;
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static void localSleep() {
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try {
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Thread.sleep(10); // sleep for 10 ms
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} catch(InterruptedException ie) {
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}
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}
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public static void infinite() {
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running = true;
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while (!stop) { localSleep(); }
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}
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}
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public class RedefinePreviousVersions {
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public static String newB = """
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class RedefinePreviousVersions_B {
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}
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""";
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public static String newRunning = """
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class RedefinePreviousVersions_Running {
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public static volatile boolean stop = true;
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public static volatile boolean running = true;
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static void localSleep() { }
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public static void infinite() { }
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}
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""";
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public static void main(String[] args) throws Exception {
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if (args.length > 0) {
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// java -javaagent:redefineagent.jar -Xlog:stuff RedefinePreviousVersions
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( "-javaagent:redefineagent.jar",
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"-Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace",
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"RedefinePreviousVersions");
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new OutputAnalyzer(pb.start())
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.shouldContain("Class unloading: should_clean_previous_versions = false")
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.shouldContain("Class unloading: should_clean_previous_versions = true")
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.shouldHaveExitValue(0);
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return;
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}
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// Start with a full GC.
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System.gc();
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// Redefine a class and create some garbage
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// Since there are no methods running, the previous version is never added to the
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// previous_version_list and the flag _should_clean_previous_versions should stay false
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RedefineClassHelper.redefineClass(RedefinePreviousVersions_B.class, newB);
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for (int i = 0; i < 10 ; i++) {
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String s = new String("some garbage");
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System.gc();
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}
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// Start a class that has a method running
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new Thread() {
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public void run() {
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RedefinePreviousVersions_Running.infinite();
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}
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}.start();
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while (!RedefinePreviousVersions_Running.running) {
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Thread.sleep(10); // sleep for 10 ms
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}
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// Since a method of newRunning is running, this class should be added to the previous_version_list
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// of Running, and _should_clean_previous_versions should return true at class unloading.
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RedefineClassHelper.redefineClass(RedefinePreviousVersions_Running.class, newRunning);
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for (int i = 0; i < 10 ; i++) {
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String s = new String("some garbage");
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System.gc();
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}
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// purge should clean everything up, except Xcomp it might not.
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RedefinePreviousVersions_Running.stop = true;
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for (int i = 0; i < 10 ; i++) {
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String s = new String("some garbage");
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System.gc();
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}
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}
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}
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