1 /* 2 * Copyright (c) 2017, 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 /* 26 * @test 27 * @summary Write a lots of shared strings. 28 * @requires vm.cds.archived.java.heap 29 * @library /test/hotspot/jtreg/runtime/appcds /test/lib 30 * @modules jdk.jartool/sun.tools.jar 31 * @build HelloString 32 * @run driver/timeout=500 SharedStringsStress 33 */ 34 import java.io.File; 35 import java.io.FileOutputStream; 36 import java.io.OutputStreamWriter; 37 import java.io.PrintWriter; 38 import jdk.test.lib.process.OutputAnalyzer; 39 import jdk.test.lib.process.ProcessTools; 40 41 public class SharedStringsStress { 42 static String sharedArchiveConfigFile = System.getProperty("user.dir") + File.separator + "SharedStringsStress_gen.txt"; 43 44 public static void main(String[] args) throws Exception { 45 try (FileOutputStream fos = new FileOutputStream(sharedArchiveConfigFile)) { 46 PrintWriter out = new PrintWriter(new OutputStreamWriter(fos)); 47 out.println("VERSION: 1.0"); 48 out.println("@SECTION: String"); 49 out.println("31: shared_test_string_unique_14325"); 50 for (int i=0; i<200000; i++) { 51 String s = "generated_string " + i; 52 out.println(s.length() + ": " + s); 53 } 54 out.close(); 55 } 56 57 SharedStringsUtils.run(args, SharedStringsStress::test); 58 } 59 60 public static void test(String[] args) throws Exception { 61 String vmOptionsPrefix[] = SharedStringsUtils.getChildVMOptionsPrefix(); 62 String appJar = JarBuilder.build("SharedStringsStress", "HelloString"); 63 64 String test_cases[][] = { 65 // default heap size 66 {}, 67 68 // Test for handling of heap fragmentation. With sharedArchiveConfigFile, we will dump about 69 // 18MB of shared objects on 64 bit VM (smaller on 32-bit). 70 // 71 // During dump time, an extra copy of these objects are allocated, 72 // so we need about 36MB, plus a few MB for other system data. So 64MB total heap 73 // should be enough. 74 // 75 // The VM should executed a full GC to maximize contiguous free space and 76 // avoid fragmentation. 77 {"-Xmx64m"}, 78 }; 79 80 for (String[] extra_opts: test_cases) { 81 vmOptionsPrefix = TestCommon.concat(vmOptionsPrefix, extra_opts); 82 83 OutputAnalyzer dumpOutput = TestCommon.dump(appJar, TestCommon.list("HelloString"), 84 TestCommon.concat(vmOptionsPrefix, 85 "-XX:SharedArchiveConfigFile=" + sharedArchiveConfigFile, 86 "-Xlog:gc+region+cds", 87 "-Xlog:gc+region=trace")); 88 TestCommon.checkDump(dumpOutput); 89 OutputAnalyzer execOutput = TestCommon.exec(appJar, 90 TestCommon.concat(vmOptionsPrefix, "HelloString")); 91 TestCommon.checkExec(execOutput); 92 } 93 } 94 }