1 /* 2 * Copyright (c) 2014, 2019, 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/timeout=480 -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 import sun.hotspot.gc.GC; 41 42 import sun.hotspot.code.Compiler; 43 44 public class UseCompressedOops { 45 main(String[] args)46 public static void main(String[] args) throws Exception { 47 testCompressedOopsModesGCs(); 48 if (!Platform.isOSX() && !Platform.isAix()) { 49 testCompressedOopsModesGCs("-XX:+UseLargePages"); 50 } 51 } 52 testCompressedOopsModesGCs(String... flags)53 public static void testCompressedOopsModesGCs(String... flags) throws Exception { 54 ArrayList<String> args = new ArrayList<>(); 55 Collections.addAll(args, flags); 56 57 // Test default. 58 testCompressedOopsModes(args); 59 // Test GCs. 60 testCompressedOopsModes(args, "-XX:+UseG1GC"); 61 if (!Compiler.isGraalEnabled()) { // Graal does not support CMS 62 testCompressedOopsModes(args, "-XX:+UseConcMarkSweepGC"); 63 } 64 testCompressedOopsModes(args, "-XX:+UseSerialGC"); 65 testCompressedOopsModes(args, "-XX:+UseParallelGC"); 66 testCompressedOopsModes(args, "-XX:+UseParallelOldGC"); 67 if (GC.Shenandoah.isSupported()) { 68 testCompressedOopsModes(args, "-XX:+UnlockExperimentalVMOptions", "-XX:+UseShenandoahGC"); 69 } 70 } 71 testCompressedOopsModes(ArrayList<String> flags1, String... flags2)72 public static void testCompressedOopsModes(ArrayList<String> flags1, String... flags2) throws Exception { 73 ArrayList<String> args = new ArrayList<>(); 74 args.addAll(flags1); 75 Collections.addAll(args, flags2); 76 77 if (Platform.is64bit()) { 78 // Explicitly turn off compressed oops 79 testCompressedOops(args, "-XX:-UseCompressedOops", "-Xmx32m") 80 .shouldNotContain("Compressed Oops") 81 .shouldHaveExitValue(0); 82 83 // Compressed oops should be on by default 84 testCompressedOops(args, "-Xmx32m") 85 .shouldContain("Compressed Oops mode") 86 .shouldHaveExitValue(0); 87 88 // Explicly enabling compressed oops 89 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m") 90 .shouldContain("Compressed Oops mode") 91 .shouldHaveExitValue(0); 92 93 // Skip the following seven test cases if we're on OSX, BSD, Windows, or Solaris. 94 // 95 // OSX and BSD don't seem to care about HeapBaseMinAddress. Windows memory 96 // locations are affected by ASLR. Solaris puts the heap way up, 97 // forcing different behaviour. 98 if (!Platform.isOSX() && !Platform.isBSD() && !Platform.isWindows() && !Platform.isSolaris()) { 99 100 // Larger than 4gb heap should result in zero based with shift 3 101 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx5g") 102 .shouldContain("Zero based") 103 .shouldContain("Oop shift amount: 3") 104 .shouldHaveExitValue(0); 105 106 // Larger than 3gb heap and HeapBaseMinAddress=1g should result in zero based with shift 3 107 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx3200m", "-XX:HeapBaseMinAddress=1g") 108 .shouldContain("Zero based") 109 .shouldContain("Oop shift amount: 3") 110 .shouldHaveExitValue(0); 111 112 // Small heap above 4gb should result in zero based with shift 3 113 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g") 114 .shouldContain("Zero based") 115 .shouldContain("Oop shift amount: 3") 116 .shouldHaveExitValue(0); 117 118 // Small heap above 32gb should result in non-zero based with shift 3 119 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g") 120 .shouldContain("Non-zero disjoint base") 121 .shouldContain("Oop shift amount: 3") 122 .shouldHaveExitValue(0); 123 124 // Small heap above 32gb should result in non-zero based with shift 3 125 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=72704m") 126 .shouldContain("Non-zero based") 127 .shouldContain("Oop shift amount: 3") 128 .shouldHaveExitValue(0); 129 130 // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result 131 // in non-zero based with shift 4 132 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16", 133 "-XX:HeapBaseMinAddress=64g") 134 .shouldContain("Non-zero disjoint base") 135 .shouldContain("Oop shift amount: 4") 136 .shouldHaveExitValue(0); 137 138 // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4 139 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16") 140 .shouldContain("Zero based") 141 .shouldContain("Oop shift amount: 4") 142 .shouldHaveExitValue(0); 143 } 144 145 // This is a pathologic case for the heap allocation algorithm. Regression test. 146 // HeapBaseMinAddress must be 2g and should not be set on the command line. 147 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx2g") 148 .shouldNotContain("Max heap size too large for Compressed Oops") 149 .shouldHaveExitValue(0); 150 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx29g", "-XX:CompressedClassSpaceSize=1g") 151 .shouldNotContain("Max heap size too large for Compressed Oops") 152 .shouldHaveExitValue(0); 153 154 // Explicitly enabling compressed oops with 32gb heap should result a warning 155 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g") 156 .shouldContain("Max heap size too large for Compressed Oops") 157 .shouldHaveExitValue(0); 158 159 // 32gb heap should not result a warning 160 testCompressedOops(args, "-Xmx32g") 161 .shouldNotContain("Max heap size too large for Compressed Oops") 162 .shouldHaveExitValue(0); 163 164 // Explicitly enabling compressed oops with 32gb heap and object 165 // alignment set to 8 byte should result a warning 166 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8") 167 .shouldContain("Max heap size too large for Compressed Oops") 168 .shouldHaveExitValue(0); 169 170 // 64gb heap and object alignment set to 16 bytes should result in a warning 171 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16") 172 .shouldContain("Max heap size too large for Compressed Oops") 173 .shouldHaveExitValue(0); 174 175 } else { 176 // Compressed oops should only apply to 64bit platforms 177 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m") 178 .shouldContain("Unrecognized VM option 'UseCompressedOops'") 179 .shouldHaveExitValue(1); 180 } 181 } 182 testCompressedOops(ArrayList<String> flags1, String... flags2)183 private static OutputAnalyzer testCompressedOops(ArrayList<String> flags1, String... flags2) throws Exception { 184 ArrayList<String> args = new ArrayList<>(); 185 186 // Always run with these two: 187 args.add("-Xlog:gc+heap+coops=trace"); 188 args.add("-Xms32m"); 189 190 // Add the extra flags 191 args.addAll(flags1); 192 Collections.addAll(args, flags2); 193 194 args.add("-version"); 195 196 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0])); 197 return new OutputAnalyzer(pb.start()); 198 } 199 } 200