1 /* 2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @summary Check to make sure that shared strings in the bootstrap CDS archive 27 * are actually shared 28 * @requires vm.cds.archived.java.heap 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @build SharedStringsWb sun.hotspot.WhiteBox 33 * @run driver ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox 34 * @run driver SharedStrings 35 */ 36 37 import jdk.test.lib.cds.CDSTestUtils; 38 import jdk.test.lib.process.ProcessTools; 39 import jdk.test.lib.process.OutputAnalyzer; 40 41 public class SharedStrings { 42 public static void main(String[] args) throws Exception { 43 // Note: This is a basic sanity test for Shared Strings feature. 44 // This also serves as a reference on how to use this feature, 45 // hence the command lines are spelled out instead of using the 46 // test utils methods. 47 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 48 "-XX:+UnlockDiagnosticVMOptions", 49 "-XX:SharedArchiveFile=./SharedStrings.jsa", 50 "-Xlog:cds,cds+hashtables", 51 // Needed for bootclasspath match, for CDS to work with WhiteBox API 52 "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"), 53 "-Xshare:dump"); 54 55 OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "dump"); 56 CDSTestUtils.checkDump(out, "Shared string table stats"); 57 58 59 pb = ProcessTools.createJavaProcessBuilder( 60 "-XX:+UnlockDiagnosticVMOptions", 61 "-XX:SharedArchiveFile=./SharedStrings.jsa", 62 // needed for access to white box test API 63 "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"), 64 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", 65 "-Xshare:on", "-showversion", "SharedStringsWb"); 66 67 out = CDSTestUtils.executeAndLog(pb, "exec"); 68 CDSTestUtils.checkExec(out); 69 } 70 }