1 /* 2 * Copyright (c) 2014, 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 8022865 27 * @summary Tests for different combination of UseCompressedOops options 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @build sun.hotspot.WhiteBox 32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission 33 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. UseCompressedOops 34 */ 35 import java.util.ArrayList; 36 import java.util.Collections; 37 import jdk.test.lib.Platform; 38 import jdk.test.lib.process.ProcessTools; 39 import jdk.test.lib.process.OutputAnalyzer; 40 41 import sun.hotspot.code.Compiler; 42 43 public class UseCompressedOops { 44 45 public static void main(String[] args) throws Exception { 46 testCompressedOopsModesGCs(); 47 testCompressedOopsModesGCs("-XX:+UseLargePages"); 48 } 49 50 public static void testCompressedOopsModesGCs(String... flags) throws Exception { 51 ArrayList<String> args = new ArrayList<>(); 52 Collections.addAll(args, flags); 53 54 // Test default. 55 testCompressedOopsModes(args); 56 // Test GCs. 57 testCompressedOopsModes(args, "-XX:+UseG1GC"); 58 if (!Compiler.isGraalEnabled()) { // Graal does not support CMS 59 testCompressedOopsModes(args, "-XX:+UseConcMarkSweepGC"); 60 } 61 testCompressedOopsModes(args, "-XX:+UseSerialGC"); 62 testCompressedOopsModes(args, "-XX:+UseParallelGC"); 63 testCompressedOopsModes(args, "-XX:+UseParallelOldGC"); 64 } 65 66 public static void testCompressedOopsModes(ArrayList<String> flags1, String... flags2) throws Exception { 67 ArrayList<String> args = new ArrayList<>(); 68 args.addAll(flags1); 69 Collections.addAll(args, flags2); 70 71 if (Platform.is64bit()) { 72 // Explicitly turn of compressed oops 73 testCompressedOops(args, "-XX:-UseCompressedOops", "-Xmx32m") 74 .shouldNotContain("Compressed Oops") 75 .shouldHaveExitValue(0); 76 77 // Compressed oops should be on by default 78 testCompressedOops(args, "-Xmx32m") 79 .shouldContain("Compressed Oops mode") 80 .shouldHaveExitValue(0); 81 82 // Explicly enabling compressed oops 83 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m") 84 .shouldContain("Compressed Oops mode") 85 .shouldHaveExitValue(0); 86 87 // Skip the following three test cases if we're on OSX or Solaris. 88 // 89 // OSX doesn't seem to care about HeapBaseMinAddress and Solaris 90 // puts the heap way up, forcing different behaviour. 91 if (!Platform.isOSX() && !Platform.isSolaris()) { 92 // Larger than 4gb heap should result in zero based with shift 3 93 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx5g") 94 .shouldContain("Zero based") 95 .shouldContain("Oop shift amount: 3") 96 .shouldHaveExitValue(0); 97 98 // Larger than 3gb heap and HeapBaseMinAddress=1g should result in zero based with shift 3 99 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx3200m", "-XX:HeapBaseMinAddress=1g") 100 .shouldContain("Zero based") 101 .shouldContain("Oop shift amount: 3") 102 .shouldHaveExitValue(0); 103 104 // Small heap above 4gb should result in zero based with shift 3 105 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g") 106 .shouldContain("Zero based") 107 .shouldContain("Oop shift amount: 3") 108 .shouldHaveExitValue(0); 109 110 // Small heap above 32gb should result in non-zero based with shift 3 111 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g") 112 .shouldContain("Non-zero disjoint base") 113 .shouldContain("Oop shift amount: 3") 114 .shouldHaveExitValue(0); 115 116 // Small heap above 32gb should result in non-zero based with shift 3 117 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=72704m") 118 .shouldContain("Non-zero based") 119 .shouldContain("Oop shift amount: 3") 120 .shouldHaveExitValue(0); 121 122 // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result 123 // in non-zero based with shift 4 124 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16", 125 "-XX:HeapBaseMinAddress=64g") 126 .shouldContain("Non-zero disjoint base") 127 .shouldContain("Oop shift amount: 4") 128 .shouldHaveExitValue(0); 129 130 // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4 131 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16") 132 .shouldContain("Zero based") 133 .shouldContain("Oop shift amount: 4") 134 .shouldHaveExitValue(0); 135 } 136 137 // This is a pathologic case for the heap allocation algorithm. Regression test. 138 // HeapBaseMinAddress must be 2g and should not be set on the command line. 139 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx2g") 140 .shouldNotContain("Max heap size too large for Compressed Oops") 141 .shouldHaveExitValue(0); 142 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx29g", "-XX:CompressedClassSpaceSize=1g") 143 .shouldNotContain("Max heap size too large for Compressed Oops") 144 .shouldHaveExitValue(0); 145 146 // Explicitly enabling compressed oops with 32gb heap should result a warning 147 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g") 148 .shouldContain("Max heap size too large for Compressed Oops") 149 .shouldHaveExitValue(0); 150 151 // 32gb heap should not result a warning 152 testCompressedOops(args, "-Xmx32g") 153 .shouldNotContain("Max heap size too large for Compressed Oops") 154 .shouldHaveExitValue(0); 155 156 // Explicitly enabling compressed oops with 32gb heap and object 157 // alignment set to 8 byte should result a warning 158 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8") 159 .shouldContain("Max heap size too large for Compressed Oops") 160 .shouldHaveExitValue(0); 161 162 // 64gb heap and object alignment set to 16 bytes should result in a warning 163 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16") 164 .shouldContain("Max heap size too large for Compressed Oops") 165 .shouldHaveExitValue(0); 166 167 } else { 168 // Compressed oops should only apply to 64bit platforms 169 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m") 170 .shouldContain("Unrecognized VM option 'UseCompressedOops'") 171 .shouldHaveExitValue(1); 172 } 173 } 174 175 private static OutputAnalyzer testCompressedOops(ArrayList<String> flags1, String... flags2) throws Exception { 176 ArrayList<String> args = new ArrayList<>(); 177 178 // Always run with these three: 179 args.add("-XX:+PrintCompressedOopsMode"); 180 args.add("-Xms32m"); 181 182 // Add the extra flags 183 args.addAll(flags1); 184 Collections.addAll(args, flags2); 185 186 args.add("-version"); 187 188 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0])); 189 return new OutputAnalyzer(pb.start()); 190 } 191 }