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