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 CompressedOopsErgoPrinter { 33 public static void main(String[] args) throws Exception { 34 WhiteBox wb = WhiteBox.getWhiteBox(); 35 wb.printCompressedOopsHeapInfo(); 36 } 37 } 38 39 final class HeapForCompressedOopsValues { 40 public long maxHeapForCompressedOops; 41 } 42 43 class TestUseCompressedOopsErgoTools { 44 45 public static boolean is64bitVM() { 46 String val = System.getProperty("sun.arch.data.model"); 47 if (val == null) { 48 throw new RuntimeException("Could not read sun.arch.data.model"); 49 } 50 if (val.equals("64")) { 51 return true; 52 } else if (val.equals("32")) { 53 return false; 54 } 55 throw new RuntimeException("Unexpected value " + val + " of sun.arch.data.model"); 56 } 57 58 private static String[] join(String[] part1, String part2) { 59 ArrayList<String> result = new ArrayList<String>(); 60 result.addAll(Arrays.asList(part1)); 61 result.add(part2); 62 return result.toArray(new String[0]); 63 } 64 65 public static void checkCompressedOopsErgo(String[] gcflags) throws Exception { 66 HeapForCompressedOopsValues v = new HeapForCompressedOopsValues(); 67 68 getMaxHeapForCompressedOops(gcflags, v); 69 70 checkUseCompressedOops(gcflags, v.maxHeapForCompressedOops, true); 71 checkUseCompressedOops(gcflags, v.maxHeapForCompressedOops - 1, true); 72 checkUseCompressedOops(gcflags, v.maxHeapForCompressedOops + 1, false); 73 74 // the use of HeapBaseMinAddress should not change the outcome 75 checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), v.maxHeapForCompressedOops, true); 76 checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), v.maxHeapForCompressedOops - 1, true); 77 checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), v.maxHeapForCompressedOops + 1, false); 78 79 // use a different object alignment 80 getMaxHeapForCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v); 81 82 checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v.maxHeapForCompressedOops, true); 83 checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v.maxHeapForCompressedOops - 1, true); 84 checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), v.maxHeapForCompressedOops + 1, false); 85 86 // use a different ClassMetaspaceSize 87 getMaxHeapForCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v); 88 89 checkUseCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v.maxHeapForCompressedOops, true); 90 checkUseCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v.maxHeapForCompressedOops - 1, true); 91 checkUseCompressedOops(join(gcflags, "-XX:ClassMetaspaceSize=1G"), v.maxHeapForCompressedOops + 1, false); 92 } 93 94 private static void checkUseCompressedOops(String[] args, long heapsize, boolean expectUseCompressedOops) throws Exception { 95 ArrayList<String> finalargs = new ArrayList<String>(); 96 finalargs.addAll(Arrays.asList(args)); 97 finalargs.add("-Xmx" + heapsize); 98 finalargs.add("-XX:+PrintFlagsFinal"); 99 finalargs.add("-version"); 100 101 String output = expectValid(finalargs.toArray(new String[0])); 102 103 boolean actualUseCompressedOops = getFlagBoolValue(" UseCompressedOops", output); 104 105 if (expectUseCompressedOops != actualUseCompressedOops) { 106 throw new RuntimeException("Expected use of compressed oops: " + expectUseCompressedOops + " but was: " + actualUseCompressedOops); 107 } 108 } 109 110 private static long valueAfter(String source, String match) { 111 int start = source.indexOf(match) + match.length(); 112 String tail = source.substring(start).split(" ")[0]; 113 return Long.parseLong(tail); 114 } 115 116 private static void getMaxHeapForCompressedOops(String[] args, HeapForCompressedOopsValues val) throws Exception { 117 ArrayList<String> finalargs = new ArrayList<String>(); 118 119 String[] testVMopts = new String[] { 120 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", 121 "-Xbootclasspath/a:.", 122 "-cp", System.getProperty("java.class.path"), 123 }; 124 125 finalargs.addAll(Arrays.asList(args)); 126 finalargs.addAll(Arrays.asList(testVMopts)); 127 finalargs.add(CompressedOopsErgoPrinter.class.getName()); 128 129 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0])); 130 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 131 output.shouldHaveExitValue(0); 132 133 // the output we watch for has the following format: 134 // 135 // "Max heap for compressed oops X Max heap alignment Y ClassMetaspaceSize Z Page size A" 136 // 137 // where X, Y, Z and A are sizes in bytes. 138 139 Matcher m = Pattern.compile("Max heap for compressed oops \\d+ ClassMetaspaceSize \\d+"). 140 matcher(output.getStdout()); 141 if (!m.find()) { 142 throw new RuntimeException("Could not find heap size string."); 143 } 144 String match = m.group(); 145 146 // parse actual values 147 val.maxHeapForCompressedOops = valueAfter(match, "Max heap for compressed oops "); 148 } 149 150 private static boolean getFlagBoolValue(String flag, String where) { 151 Matcher m = Pattern.compile(flag + "\\s+:?= (true|false)").matcher(where); 152 if (!m.find()) { 153 throw new RuntimeException("Could not find value for flag " + flag + " in output string"); 154 } 155 String match = m.group(); 156 return match.substring(match.lastIndexOf(" ") + 1, match.length()).equals("true"); 157 } 158 159 private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception { 160 if (contains) { 161 output.shouldContain(message); 162 } else { 163 output.shouldNotContain(message); 164 } 165 } 166 167 private static String expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception { 168 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags); 169 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 170 output.shouldHaveExitValue(errorcode); 171 return output.getStdout(); 172 } 173 174 private static String expectValid(String[] flags) throws Exception { 175 return expect(flags, false, false, 0); 176 } 177 } 178