/* * Copyright (c) 2020, 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 8249276 * @summary When dumping the CDS archive, try to lock some objects. These objects should be archived * without the locking bits in the markWord. * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds * @requires vm.cds * @requires vm.jvmti * @modules java.instrument * @run driver LockDuringDump */ import jdk.test.lib.process.OutputAnalyzer; public class LockDuringDump { public static String appClasses[] = { LockDuringDumpApp.class.getName(), }; public static String agentClasses[] = { LockDuringDumpAgent.class.getName(), }; private static final String MANIFEST = "Manifest-Version: 1.0\nPremain-Class: LockDuringDumpAgent\n"; public static void main(String[] args) throws Throwable { String agentJar = ClassFileInstaller.writeJar("LockDuringDumpAgent.jar", ClassFileInstaller.Manifest.fromString(MANIFEST), agentClasses); String appJar = ClassFileInstaller.writeJar("LockDuringDumpApp.jar", appClasses); for (int i = 0; i < 3; i++) { // i = 0 -- dump without agent // i = 1 -- dump with agent = disable BiasedLocking // i = 2 -- dump with agent = enable BiasedLocking String agentArg = (i == 0) ? "-showversion" : "-javaagent:" + agentJar; String agentArg2 = (i == 0) ? "-showversion" : "-XX:+AllowArchivingWithJavaAgent"; String biasedLock = (i != 2) ? "-showversion" : "-XX:+UseBiasedLocking"; OutputAnalyzer out = TestCommon.testDump(appJar, TestCommon.list(LockDuringDumpApp.class.getName()), "-XX:+UnlockDiagnosticVMOptions", agentArg, agentArg2, biasedLock); if (i != 0) { out.shouldContain("Let's hold the lock on the literal string"); } TestCommon.run( "-cp", appJar, "-XX:+UnlockDiagnosticVMOptions", agentArg2, biasedLock, LockDuringDumpApp.class.getName()) .assertNormalExit("I am able to lock the literal string"); } } }