1 /* 2 * Copyright (c) 2016, 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 SharedStringsDedup 26 * @summary Test -Xshare:auto with shared strings and -XX:+UseStringDeduplication 27 * Feature support: G1GC only, compressed oops/kptrs, 64-bit os, not on windows 28 * @requires (sun.arch.data.model != "32") & (os.family != "windows") 29 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) 30 * @requires vm.gc.G1 31 * @library /testlibrary 32 * @modules java.base/jdk.internal.misc 33 * java.management 34 * @run main SharedStringsDedup 35 */ 36 37 import jdk.test.lib.*; 38 import java.io.File; 39 40 // The main purpose is to test the interaction between shared strings 41 // and -XX:+UseStringDeduplication. We run in -Xshare:auto mode so 42 // we don't need to worry about CDS archive mapping failure (which 43 // doesn't happen often so it won't impact coverage). 44 public class SharedStringsDedup { 45 public static void main(String[] args) throws Exception { 46 // Dump 47 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 48 "-XX:+UnlockDiagnosticVMOptions", 49 "-XX:SharedArchiveFile=./SharedStringsDedup.jsa", 50 "-XX:+UseCompressedOops", "-XX:+UseG1GC", 51 "-XX:+PrintSharedSpaces", 52 "-Xshare:dump"); 53 54 new OutputAnalyzer(pb.start()) 55 .shouldContain("Loading classes to share") 56 .shouldContain("Shared string table stats") 57 .shouldHaveExitValue(0); 58 59 // Run with -Xshare:auto 60 pb = ProcessTools.createJavaProcessBuilder( 61 "-XX:+UnlockDiagnosticVMOptions", 62 "-XX:SharedArchiveFile=./SharedStringsDedup.jsa", 63 "-XX:+UseCompressedOops", "-XX:+UseG1GC", 64 "-XX:+UseStringDeduplication", 65 "-Xshare:auto", 66 "-version"); 67 68 new OutputAnalyzer(pb.start()) 69 .shouldMatch("(java|openjdk) version") 70 .shouldHaveExitValue(0); 71 } 72 }