1 /* 2 * Copyright (c) 2013, 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 import java.util.regex.Matcher; 25 import java.util.regex.Pattern; 26 import java.util.ArrayList; 27 import java.util.Arrays; 28 29 import com.oracle.java.testlibrary.*; 30 import sun.hotspot.WhiteBox; 31 32 class ErgoArgsPrinter { 33 public static void main(String[] args) throws Exception { 34 WhiteBox wb = WhiteBox.getWhiteBox(); 35 wb.printHeapSizes(); 36 } 37 } 38 39 final class MinInitialMaxValues { 40 public long minHeapSize; 41 public long initialHeapSize; 42 public long maxHeapSize; 43 44 public long minAlignment; 45 public long maxAlignment; 46 } 47 48 class TestMaxHeapSizeTools { 49 50 public static void checkMinInitialMaxHeapFlags(String gcflag) throws Exception { 51 checkInvalidMinInitialHeapCombinations(gcflag); 52 checkValidMinInitialHeapCombinations(gcflag); 53 checkInvalidInitialMaxHeapCombinations(gcflag); 54 checkValidInitialMaxHeapCombinations(gcflag); 55 } 56 57 public static void checkMinInitialErgonomics(String gcflag) throws Exception { 58 // heap sizing ergonomics use the value NewSize + OldSize as default values 59 // for ergonomics calculation. Retrieve these values. 60 long[] values = new long[2]; 61 getNewOldSize(gcflag, values); 62 63 // we check cases with values smaller and larger than this default value. 64 long newPlusOldSize = values[0] + values[1]; 65 long smallValue = newPlusOldSize / 2; 66 long largeValue = newPlusOldSize * 2; 67 68 // -Xms is not set 69 checkErgonomics(new String[] { gcflag, "-Xmx16M" }, values, -1, -1); 70 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue); 71 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue); 72 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=0" }, values, -1, -1); 73 74 // -Xms is set to zero 75 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0" }, values, -1, -1); 76 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue); 77 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue); 78 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=0" }, values, -1, -1); 79 80 // -Xms is set to small value 81 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue }, values, -1, -1); 82 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue); 83 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + largeValue }, values, smallValue, largeValue); 84 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=0" }, values, smallValue, -1); 85 86 // -Xms is set to large value 87 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue }, values, largeValue, largeValue); 88 // the next case has already been checked elsewhere and gives an error 89 // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue); 90 // the next case has already been checked elsewhere too 91 // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + largeValue }, values, values[0], largeValue); 92 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=0" }, values, largeValue, -1); 93 } 94 95 private static long align_up(long value, long alignment) { 96 long alignmentMinusOne = alignment - 1; 97 return (value + alignmentMinusOne) & ~alignmentMinusOne; 98 } 99 100 private static void getNewOldSize(String gcflag, long[] values) throws Exception { 101 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(gcflag, 102 "-XX:+PrintFlagsFinal", "-version"); 103 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 104 output.shouldHaveExitValue(0); 105 106 String stdout = output.getStdout(); 107 values[0] = getFlagValue(" NewSize", stdout); 108 values[1] = getFlagValue(" OldSize", stdout); 109 } 110 111 public static void checkGenMaxHeapErgo(String gcflag) throws Exception { 112 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 3); 113 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 4); 114 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 5); 115 } 116 117 private static void checkInvalidMinInitialHeapCombinations(String gcflag) throws Exception { 118 expectError(new String[] { gcflag, "-Xms8M", "-XX:InitialHeapSize=4M", "-version" }); 119 } 120 121 private static void checkValidMinInitialHeapCombinations(String gcflag) throws Exception { 122 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms4M", "-version" }); 123 expectValid(new String[] { gcflag, "-Xms4M", "-XX:InitialHeapSize=8M", "-version" }); 124 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms8M", "-version" }); 125 // the following is not an error as -Xms sets both minimal and initial heap size 126 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-Xms8M", "-version" }); 127 } 128 129 private static void checkInvalidInitialMaxHeapCombinations(String gcflag) throws Exception { 130 expectError(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=8M", "-version" }); 131 expectError(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-XX:MaxHeapSize=4M", "-version" }); 132 } 133 134 private static void checkValidInitialMaxHeapCombinations(String gcflag) throws Exception { 135 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-XX:MaxHeapSize=8M", "-version" }); 136 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=8M", "-XX:InitialHeapSize=4M", "-version" }); 137 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=4M", "-version" }); 138 // a value of "0" for initial heap size means auto-detect 139 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=0M", "-version" }); 140 } 141 142 private static long valueAfter(String source, String match) { 143 int start = source.indexOf(match) + match.length(); 144 String tail = source.substring(start).split(" ")[0]; 145 return Long.parseLong(tail); 146 } 147 148 /** 149 * Executes a new VM process with the given class and parameters. 150 * @param vmargs Arguments to the VM to run 151 * @param classname Name of the class to run 152 * @param arguments Arguments to the class 153 * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string 154 * @return The OutputAnalyzer with the results for the invocation. 155 */ 156 public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception { 157 ArrayList<String> finalargs = new ArrayList<String>(); 158 159 String[] whiteboxOpts = new String[] { 160 "-Xbootclasspath/a:.", 161 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", 162 "-cp", System.getProperty("java.class.path"), 163 }; 164 165 if (useTestDotJavaDotOpts) { 166 // System.getProperty("test.java.opts") is '' if no options is set, 167 // we need to skip such a result 168 String[] externalVMOpts = new String[0]; 169 if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) { 170 externalVMOpts = System.getProperty("test.java.opts").split(" "); 171 } 172 finalargs.addAll(Arrays.asList(externalVMOpts)); 173 } 174 175 finalargs.addAll(Arrays.asList(vmargs)); 176 finalargs.addAll(Arrays.asList(whiteboxOpts)); 177 finalargs.add(classname); 178 finalargs.addAll(Arrays.asList(arguments)); 179 180 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0])); 181 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 182 output.shouldHaveExitValue(0); 183 184 return output; 185 } 186 187 private static void getMinInitialMaxHeap(String[] args, MinInitialMaxValues val) throws Exception { 188 OutputAnalyzer output = runWhiteBoxTest(args, ErgoArgsPrinter.class.getName(), new String[] {}, false); 189 190 // the output we watch for has the following format: 191 // 192 // "Minimum heap X Initial heap Y Maximum heap Z Min alignment A Max Alignment B" 193 // 194 // where A, B, X, Y and Z are sizes in bytes. 195 // Unfortunately there is no other way to retrieve the minimum heap size and 196 // the alignments. 197 198 Matcher m = Pattern.compile("Minimum heap \\d+ Initial heap \\d+ Maximum heap \\d+ Min alignment \\d+ Max alignment \\d+"). 199 matcher(output.getStdout()); 200 if (!m.find()) { 201 throw new RuntimeException("Could not find heap size string."); 202 } 203 204 String match = m.group(); 205 206 // actual values 207 val.minHeapSize = valueAfter(match, "Minimum heap "); 208 val.initialHeapSize = valueAfter(match, "Initial heap "); 209 val.maxHeapSize = valueAfter(match, "Maximum heap "); 210 val.minAlignment = valueAfter(match, "Min alignment "); 211 val.maxAlignment = valueAfter(match, "Max alignment "); 212 } 213 214 /** 215 * Verify whether the VM automatically synchronizes minimum and initial heap size if only 216 * one is given for the GC specified. 217 */ 218 public static void checkErgonomics(String[] args, long[] newoldsize, 219 long expectedMin, long expectedInitial) throws Exception { 220 221 MinInitialMaxValues v = new MinInitialMaxValues(); 222 getMinInitialMaxHeap(args, v); 223 224 if ((expectedMin != -1) && (align_up(expectedMin, v.minAlignment) != v.minHeapSize)) { 225 throw new RuntimeException("Actual minimum heap size of " + v.minHeapSize + 226 " differs from expected minimum heap size of " + expectedMin); 227 } 228 229 if ((expectedInitial != -1) && (align_up(expectedInitial, v.minAlignment) != v.initialHeapSize)) { 230 throw new RuntimeException("Actual initial heap size of " + v.initialHeapSize + 231 " differs from expected initial heap size of " + expectedInitial); 232 } 233 234 // always check the invariant min <= initial <= max heap size 235 if (!(v.minHeapSize <= v.initialHeapSize && v.initialHeapSize <= v.maxHeapSize)) { 236 throw new RuntimeException("Inconsistent min/initial/max heap sizes, they are " + 237 v.minHeapSize + "/" + v.initialHeapSize + "/" + v.maxHeapSize); 238 } 239 } 240 241 /** 242 * Verify whether the VM respects the given maximum heap size in MB for the 243 * GC specified. 244 * @param gcflag The garbage collector to test as command line flag. E.g. -XX:+UseG1GC 245 * @param maxHeapSize the maximum heap size to verify, in MB. 246 */ 247 public static void checkGenMaxHeapSize(String gcflag, long maxHeapsize) throws Exception { 248 final long K = 1024; 249 250 MinInitialMaxValues v = new MinInitialMaxValues(); 251 getMinInitialMaxHeap(new String[] { gcflag, "-XX:MaxHeapSize=" + maxHeapsize + "M" }, v); 252 253 long expectedHeapSize = align_up(maxHeapsize * K * K, v.maxAlignment); 254 long actualHeapSize = v.maxHeapSize; 255 256 if (actualHeapSize > expectedHeapSize) { 257 throw new RuntimeException("Heap has " + actualHeapSize + 258 " bytes, expected to be less than " + expectedHeapSize); 259 } 260 } 261 262 private static long getFlagValue(String flag, String where) { 263 Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where); 264 if (!m.find()) { 265 throw new RuntimeException("Could not find value for flag " + flag + " in output string"); 266 } 267 String match = m.group(); 268 return Long.parseLong(match.substring(match.lastIndexOf(" ") + 1, match.length())); 269 } 270 271 private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception { 272 if (contains) { 273 output.shouldContain(message); 274 } else { 275 output.shouldNotContain(message); 276 } 277 } 278 279 private static void expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception { 280 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags); 281 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 282 shouldContainOrNot(output, hasWarning, "Warning"); 283 shouldContainOrNot(output, hasError, "Error"); 284 output.shouldHaveExitValue(errorcode); 285 } 286 287 private static void expectError(String[] flags) throws Exception { 288 expect(flags, false, true, 1); 289 } 290 291 private static void expectValid(String[] flags) throws Exception { 292 expect(flags, false, false, 0); 293 } 294 } 295