1 /* 2 * Copyright (c) 2013, 2020, 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.bits == 64 & os.family != "windows" & !vm.graal.enabled 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @run driver CompressedClassPointers 33 */ 34 35 import jdk.test.lib.Platform; 36 import jdk.test.lib.process.ProcessTools; 37 import jdk.test.lib.process.OutputAnalyzer; 38 import jtreg.SkippedException; 39 40 public class CompressedClassPointers { 41 42 public static void smallHeapTest() throws Exception { 43 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 44 "-XX:+UnlockDiagnosticVMOptions", 45 "-XX:SharedBaseAddress=8g", 46 "-Xmx128m", 47 "-Xlog:gc+metaspace=trace", 48 "-Xshare:off", 49 "-Xlog:cds=trace", 50 "-XX:+VerifyBeforeGC", "-version"); 51 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 52 output.shouldContain("Narrow klass base: 0x0000000000000000"); 53 output.shouldHaveExitValue(0); 54 } 55 56 public static void smallHeapTestWith1G() throws Exception { 57 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 58 "-XX:+UnlockDiagnosticVMOptions", 59 "-XX:CompressedClassSpaceSize=1g", 60 "-Xmx128m", 61 "-Xlog:gc+metaspace=trace", 62 "-Xshare:off", 63 "-Xlog:cds=trace", 64 "-XX:+VerifyBeforeGC", "-version"); 65 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 66 output.shouldContain("Narrow klass base: 0x0000000000000000, Narrow klass shift: 3"); 67 output.shouldHaveExitValue(0); 68 } 69 70 public static void largeHeapTest() throws Exception { 71 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 72 "-XX:+UnlockDiagnosticVMOptions", 73 "-XX:+UnlockExperimentalVMOptions", 74 "-Xmx30g", 75 "-XX:-UseAOT", // AOT explicitly set klass shift to 3. 76 "-Xlog:gc+metaspace=trace", 77 "-Xshare:off", 78 "-Xlog:cds=trace", 79 "-XX:+VerifyBeforeGC", "-version"); 80 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 81 output.shouldNotContain("Narrow klass base: 0x0000000000000000"); 82 output.shouldContain("Narrow klass shift: 0"); 83 output.shouldHaveExitValue(0); 84 } 85 86 public static void largePagesTest() throws Exception { 87 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 88 "-XX:+UnlockDiagnosticVMOptions", 89 "-Xmx128m", 90 "-XX:+UseLargePages", 91 "-Xlog:gc+metaspace=trace", 92 "-XX:+VerifyBeforeGC", "-version"); 93 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 94 output.shouldContain("Narrow klass base:"); 95 output.shouldHaveExitValue(0); 96 } 97 98 public static void heapBaseMinAddressTest() throws Exception { 99 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 100 "-XX:HeapBaseMinAddress=1m", 101 "-Xlog:gc+heap+coops=debug", 102 "-version"); 103 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 104 output.shouldContain("HeapBaseMinAddress must be at least"); 105 output.shouldHaveExitValue(0); 106 } 107 108 public static void sharingTest() throws Exception { 109 // Test small heaps 110 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 111 "-XX:+UnlockDiagnosticVMOptions", 112 "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", 113 "-Xmx128m", 114 "-XX:SharedBaseAddress=8g", 115 "-XX:+PrintCompressedOopsMode", 116 "-XX:+VerifyBeforeGC", 117 "-Xshare:dump", "-Xlog:cds"); 118 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 119 if (output.firstMatch("Shared spaces are not supported in this VM") != null) { 120 return; 121 } 122 try { 123 output.shouldContain("Loading classes to share"); 124 output.shouldHaveExitValue(0); 125 126 pb = ProcessTools.createJavaProcessBuilder( 127 "-XX:+UnlockDiagnosticVMOptions", 128 "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", 129 "-Xmx128m", 130 "-XX:SharedBaseAddress=8g", 131 "-XX:+PrintCompressedOopsMode", 132 "-Xshare:on", 133 "-version"); 134 output = new OutputAnalyzer(pb.start()); 135 output.shouldContain("sharing"); 136 output.shouldHaveExitValue(0); 137 138 } catch (RuntimeException e) { 139 output.shouldContain("Unable to use shared archive"); 140 output.shouldHaveExitValue(1); 141 } 142 } 143 144 public static void smallHeapTestNoCoop() throws Exception { 145 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 146 "-XX:-UseCompressedOops", 147 "-XX:+UseCompressedClassPointers", 148 "-XX:+UnlockDiagnosticVMOptions", 149 "-XX:SharedBaseAddress=8g", 150 "-Xmx128m", 151 "-Xlog:gc+metaspace=trace", 152 "-Xshare:off", 153 "-Xlog:cds=trace", 154 "-XX:+VerifyBeforeGC", "-version"); 155 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 156 output.shouldContain("Narrow klass base: 0x0000000000000000"); 157 output.shouldHaveExitValue(0); 158 } 159 160 public static void smallHeapTestWith1GNoCoop() throws Exception { 161 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 162 "-XX:-UseCompressedOops", 163 "-XX:+UseCompressedClassPointers", 164 "-XX:+UnlockDiagnosticVMOptions", 165 "-XX:CompressedClassSpaceSize=1g", 166 "-Xmx128m", 167 "-Xlog:gc+metaspace=trace", 168 "-Xshare:off", 169 "-Xlog:cds=trace", 170 "-XX:+VerifyBeforeGC", "-version"); 171 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 172 output.shouldContain("Narrow klass base: 0x0000000000000000"); 173 output.shouldContain("Narrow klass shift: 0"); 174 output.shouldHaveExitValue(0); 175 } 176 177 public static void largeHeapTestNoCoop() throws Exception { 178 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 179 "-XX:-UseCompressedOops", 180 "-XX:+UseCompressedClassPointers", 181 "-XX:+UnlockDiagnosticVMOptions", 182 "-XX:+UnlockExperimentalVMOptions", 183 "-Xmx30g", 184 "-XX:-UseAOT", // AOT explicitly set klass shift to 3. 185 "-Xlog:gc+metaspace=trace", 186 "-Xshare:off", 187 "-Xlog:cds=trace", 188 "-XX:+VerifyBeforeGC", "-version"); 189 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 190 output.shouldContain("Narrow klass base: 0x0000000000000000"); 191 output.shouldContain("Narrow klass shift: 0"); 192 output.shouldHaveExitValue(0); 193 } 194 195 public static void largePagesTestNoCoop() throws Exception { 196 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 197 "-XX:-UseCompressedOops", 198 "-XX:+UseCompressedClassPointers", 199 "-XX:+UnlockDiagnosticVMOptions", 200 "-Xmx128m", 201 "-XX:+UseLargePages", 202 "-Xlog:gc+metaspace=trace", 203 "-XX:+VerifyBeforeGC", "-version"); 204 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 205 output.shouldContain("Narrow klass base:"); 206 output.shouldHaveExitValue(0); 207 } 208 209 public static void heapBaseMinAddressTestNoCoop() throws Exception { 210 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 211 "-XX:-UseCompressedOops", 212 "-XX:+UseCompressedClassPointers", 213 "-XX:HeapBaseMinAddress=1m", 214 "-Xlog:gc+heap+coops=debug", 215 "-version"); 216 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 217 output.shouldContain("HeapBaseMinAddress must be at least"); 218 output.shouldHaveExitValue(0); 219 } 220 221 public static void sharingTestNoCoop() throws Exception { 222 // Test small heaps 223 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 224 "-XX:-UseCompressedOops", 225 "-XX:+UseCompressedClassPointers", 226 "-XX:+UnlockDiagnosticVMOptions", 227 "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", 228 "-Xmx128m", 229 "-XX:SharedBaseAddress=8g", 230 "-XX:+PrintCompressedOopsMode", 231 "-XX:+VerifyBeforeGC", 232 "-Xshare:dump", "-Xlog:cds"); 233 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 234 if (output.firstMatch("Shared spaces are not supported in this VM") != null) { 235 return; 236 } 237 try { 238 output.shouldContain("Loading classes to share"); 239 output.shouldHaveExitValue(0); 240 241 pb = ProcessTools.createJavaProcessBuilder( 242 "-XX:-UseCompressedOops", 243 "-XX:+UseCompressedClassPointers", 244 "-XX:+UnlockDiagnosticVMOptions", 245 "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", 246 "-Xmx128m", 247 "-XX:SharedBaseAddress=8g", 248 "-XX:+PrintCompressedOopsMode", 249 "-Xshare:on", 250 "-version"); 251 output = new OutputAnalyzer(pb.start()); 252 output.shouldContain("sharing"); 253 output.shouldHaveExitValue(0); 254 255 } catch (RuntimeException e) { 256 output.shouldContain("Unable to use shared archive"); 257 output.shouldHaveExitValue(1); 258 } 259 } 260 261 public static void main(String[] args) throws Exception { 262 smallHeapTest(); 263 smallHeapTestWith1G(); 264 largeHeapTest(); 265 largePagesTest(); 266 heapBaseMinAddressTest(); 267 sharingTest(); 268 269 boolean ccpRequiresCoop = Platform.isAArch64(); 270 271 if (!ccpRequiresCoop && !Platform.isOSX()) { 272 // Testing compressed class pointers without compressed oops. 273 // This is only possible if the platform supports it. Notably, 274 // on macOS, when compressed oops is disabled and the heap is 275 // given an arbitrary address, that address occasionally collides 276 // with where we would ideally have placed the compressed class 277 // space. Therefore, macOS is omitted for now. 278 smallHeapTestNoCoop(); 279 smallHeapTestWith1GNoCoop(); 280 largeHeapTestNoCoop(); 281 largePagesTestNoCoop(); 282 heapBaseMinAddressTestNoCoop(); 283 sharingTestNoCoop(); 284 } 285 } 286 }