1 /* 2 * Copyright (c) 2015, 2017, 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 * @requires vm.cds 27 * @summary Check to make sure that shared strings in the bootstrap CDS archive 28 * are actually shared 29 * Feature support: G1GC only, compressed oops/kptrs, 64-bit os, not on windows 30 * @requires (sun.arch.data.model != "32") & (os.family != "windows") 31 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) 32 * @requires vm.gc.G1 33 * @library /test/lib 34 * @modules java.base/jdk.internal.misc 35 * java.management 36 * @build SharedStringsWb sun.hotspot.WhiteBox 37 * @run main ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox 38 * @run main SharedStrings 39 */ 40 41 import jdk.test.lib.cds.CDSTestUtils; 42 import jdk.test.lib.process.ProcessTools; 43 import jdk.test.lib.process.OutputAnalyzer; 44 45 public class SharedStrings { 46 public static void main(String[] args) throws Exception { 47 // Note: This is a basic sanity test for Shared Strings feature. 48 // This also serves as a reference on how to use this feature, 49 // hence the command lines are spelled out instead of using the 50 // test utils methods. 51 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 52 "-XX:+UnlockDiagnosticVMOptions", 53 "-XX:SharedArchiveFile=./SharedStrings.jsa", 54 "-XX:+UseG1GC", 55 "-XX:+UseCompressedOops", 56 "-Xlog:cds,cds+hashtables", 57 // Needed for bootclasspath match, for CDS to work with WhiteBox API 58 "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"), 59 "-Xshare:dump"); 60 61 OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "dump"); 62 CDSTestUtils.checkDump(out, "Shared string table stats"); 63 64 65 pb = ProcessTools.createJavaProcessBuilder( 66 "-XX:+UnlockDiagnosticVMOptions", 67 "-XX:SharedArchiveFile=./SharedStrings.jsa", 68 // these are required modes for shared strings 69 "-XX:+UseCompressedOops", "-XX:+UseG1GC", 70 // needed for access to white box test API 71 "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"), 72 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", 73 "-Xshare:on", "-showversion", "SharedStringsWb"); 74 75 out = CDSTestUtils.executeAndLog(pb, "exec"); 76 CDSTestUtils.checkExec(out); 77 } 78 }