1 /* 2 * Copyright (c) 2013, 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 * @bug 8024927 27 * @summary Testing address of compressed class pointer space as best as possible. 28 * @requires vm.opt.final.UseCompressedOops 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 */ 33 34 import jdk.test.lib.Platform; 35 import jdk.test.lib.process.ProcessTools; 36 import jdk.test.lib.process.OutputAnalyzer; 37 38 public class CompressedClassPointers { 39 40 public static void smallHeapTest() throws Exception { 41 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 42 "-XX:+UnlockDiagnosticVMOptions", 43 "-XX:SharedBaseAddress=8g", 44 "-Xmx128m", 45 "-Xlog:gc+metaspace=trace", 46 "-Xshare:off", 47 "-Xlog:cds=trace", 48 "-XX:+VerifyBeforeGC", "-version"); 49 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 50 output.shouldContain("Narrow klass base: 0x0000000000000000"); 51 output.shouldHaveExitValue(0); 52 } 53 54 public static void smallHeapTestWith3G() throws Exception { 55 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 56 "-XX:+UnlockDiagnosticVMOptions", 57 "-XX:CompressedClassSpaceSize=3g", 58 "-Xmx128m", 59 "-Xlog:gc+metaspace=trace", 60 "-Xshare:off", 61 "-Xlog:cds=trace", 62 "-XX:+VerifyBeforeGC", "-version"); 63 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 64 output.shouldContain("Narrow klass base: 0x0000000000000000, Narrow klass shift: 3"); 65 output.shouldHaveExitValue(0); 66 } 67 68 public static void largeHeapTest() throws Exception { 69 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 70 "-XX:+UnlockDiagnosticVMOptions", 71 "-Xmx30g", 72 "-XX:-UseAOT", // AOT explicitly set klass shift to 3. 73 "-Xlog:gc+metaspace=trace", 74 "-Xshare:off", 75 "-Xlog:cds=trace", 76 "-XX:+VerifyBeforeGC", "-version"); 77 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 78 output.shouldNotContain("Narrow klass base: 0x0000000000000000"); 79 output.shouldContain("Narrow klass shift: 0"); 80 output.shouldHaveExitValue(0); 81 } 82 83 public static void largePagesTest() throws Exception { 84 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 85 "-XX:+UnlockDiagnosticVMOptions", 86 "-Xmx128m", 87 "-XX:+UseLargePages", 88 "-Xlog:gc+metaspace=trace", 89 "-XX:+VerifyBeforeGC", "-version"); 90 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 91 output.shouldContain("Narrow klass base:"); 92 output.shouldHaveExitValue(0); 93 } 94 95 public static void heapBaseMinAddressTest() throws Exception { 96 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 97 "-XX:HeapBaseMinAddress=1m", 98 "-Xlog:gc+heap+coops=debug", 99 "-version"); 100 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 101 output.shouldContain("HeapBaseMinAddress must be at least"); 102 output.shouldHaveExitValue(0); 103 } 104 105 public static void sharingTest() throws Exception { 106 // Test small heaps 107 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 108 "-XX:+UnlockDiagnosticVMOptions", 109 "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", 110 "-Xmx128m", 111 "-XX:SharedBaseAddress=8g", 112 "-XX:+PrintCompressedOopsMode", 113 "-XX:+VerifyBeforeGC", 114 "-Xshare:dump"); 115 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 116 if (output.firstMatch("Shared spaces are not supported in this VM") != null) { 117 return; 118 } 119 try { 120 output.shouldContain("Loading classes to share"); 121 output.shouldHaveExitValue(0); 122 123 pb = ProcessTools.createJavaProcessBuilder( 124 "-XX:+UnlockDiagnosticVMOptions", 125 "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", 126 "-Xmx128m", 127 "-XX:SharedBaseAddress=8g", 128 "-XX:+PrintCompressedOopsMode", 129 "-Xshare:on", 130 "-version"); 131 output = new OutputAnalyzer(pb.start()); 132 output.shouldContain("sharing"); 133 output.shouldHaveExitValue(0); 134 135 } catch (RuntimeException e) { 136 output.shouldContain("Unable to use shared archive"); 137 output.shouldHaveExitValue(1); 138 } 139 } 140 141 public static void main(String[] args) throws Exception { 142 if (!Platform.is64bit()) { 143 // Can't test this on 32 bit, just pass 144 System.out.println("Skipping test on 32bit"); 145 return; 146 } 147 // Solaris 10 can't mmap compressed oops space without a base 148 if (Platform.isSolaris()) { 149 String name = System.getProperty("os.version"); 150 if (name.equals("5.10")) { 151 System.out.println("Skipping test on Solaris 10"); 152 return; 153 } 154 } 155 smallHeapTest(); 156 smallHeapTestWith3G(); 157 largeHeapTest(); 158 largePagesTest(); 159 heapBaseMinAddressTest(); 160 sharingTest(); 161 } 162 }