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10284
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 import java.util.regex.Matcher;
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25 import java.util.regex.Pattern;
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26 import java.util.ArrayList;
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27 import java.util.Arrays;
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28
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29 import com.oracle.java.testlibrary.*;
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30 import sun.hotspot.WhiteBox;
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31
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32 class ErgoArgsPrinter {
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33 public static void main(String[] args) throws Exception {
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34 WhiteBox wb = WhiteBox.getWhiteBox();
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35 wb.printHeapSizes();
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36 }
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37 }
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38
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39 final class MinInitialMaxValues {
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40 public long minHeapSize;
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41 public long initialHeapSize;
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42 public long maxHeapSize;
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43
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44 public long minAlignment;
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45 public long maxAlignment;
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46 }
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47
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48 class TestMaxHeapSizeTools {
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49
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50 public static void checkMinInitialMaxHeapFlags(String gcflag) throws Exception {
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51 checkInvalidMinInitialHeapCombinations(gcflag);
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52 checkValidMinInitialHeapCombinations(gcflag);
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53 checkInvalidInitialMaxHeapCombinations(gcflag);
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54 checkValidInitialMaxHeapCombinations(gcflag);
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55 }
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56
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57 public static void checkMinInitialErgonomics(String gcflag) throws Exception {
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58 // heap sizing ergonomics use the value NewSize + OldSize as default values
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59 // for ergonomics calculation. Retrieve these values.
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60 long[] values = new long[2];
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61 getNewOldSize(gcflag, values);
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62
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63 // we check cases with values smaller and larger than this default value.
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64 long newPlusOldSize = values[0] + values[1];
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65 long smallValue = newPlusOldSize / 2;
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66 long largeValue = newPlusOldSize * 2;
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67
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68 // -Xms is not set
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69 checkErgonomics(new String[] { gcflag, "-Xmx16M" }, values, -1, -1);
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70 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
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71 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
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72 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=0" }, values, -1, -1);
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73
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74 // -Xms is set to zero
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75 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0" }, values, -1, -1);
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76 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
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77 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);
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78 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=0" }, values, -1, -1);
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79
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80 // -Xms is set to small value
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81 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue }, values, -1, -1);
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82 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
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83 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + largeValue }, values, smallValue, largeValue);
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84 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=0" }, values, smallValue, -1);
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85
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86 // -Xms is set to large value
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87 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue }, values, largeValue, largeValue);
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88 // the next case has already been checked elsewhere and gives an error
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89 // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);
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90 // the next case has already been checked elsewhere too
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91 // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + largeValue }, values, values[0], largeValue);
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92 checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=0" }, values, largeValue, -1);
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93 }
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94
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95 private static long align_up(long value, long alignment) {
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96 long alignmentMinusOne = alignment - 1;
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97 return (value + alignmentMinusOne) & ~alignmentMinusOne;
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98 }
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99
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100 private static void getNewOldSize(String gcflag, long[] values) throws Exception {
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101 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(gcflag,
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102 "-XX:+PrintFlagsFinal", "-version");
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103 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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104 output.shouldHaveExitValue(0);
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105
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106 String stdout = output.getStdout();
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107 values[0] = getFlagValue(" NewSize", stdout);
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108 values[1] = getFlagValue(" OldSize", stdout);
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109 }
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110
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111 public static void checkGenMaxHeapErgo(String gcflag) throws Exception {
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112 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 3);
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113 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 4);
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114 TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 5);
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115 }
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116
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117 private static void checkInvalidMinInitialHeapCombinations(String gcflag) throws Exception {
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118 expectError(new String[] { gcflag, "-Xms8M", "-XX:InitialHeapSize=4M", "-version" });
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119 }
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120
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121 private static void checkValidMinInitialHeapCombinations(String gcflag) throws Exception {
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122 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms4M", "-version" });
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123 expectValid(new String[] { gcflag, "-Xms4M", "-XX:InitialHeapSize=8M", "-version" });
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124 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms8M", "-version" });
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125 // the following is not an error as -Xms sets both minimal and initial heap size
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126 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-Xms8M", "-version" });
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127 }
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128
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129 private static void checkInvalidInitialMaxHeapCombinations(String gcflag) throws Exception {
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130 expectError(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=8M", "-version" });
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131 expectError(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-XX:MaxHeapSize=4M", "-version" });
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132 }
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133
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134 private static void checkValidInitialMaxHeapCombinations(String gcflag) throws Exception {
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135 expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-XX:MaxHeapSize=8M", "-version" });
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136 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=8M", "-XX:InitialHeapSize=4M", "-version" });
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137 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=4M", "-version" });
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138 // a value of "0" for initial heap size means auto-detect
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139 expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=0M", "-version" });
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140 }
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141
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142 private static long valueAfter(String source, String match) {
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143 int start = source.indexOf(match) + match.length();
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144 String tail = source.substring(start).split(" ")[0];
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145 return Long.parseLong(tail);
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146 }
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147
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148 /**
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149 * Executes a new VM process with the given class and parameters.
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150 * @param vmargs Arguments to the VM to run
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151 * @param classname Name of the class to run
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152 * @param arguments Arguments to the class
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153 * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string
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154 * @return The OutputAnalyzer with the results for the invocation.
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155 */
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156 public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {
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157 ArrayList<String> finalargs = new ArrayList<String>();
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158
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159 String[] whiteboxOpts = new String[] {
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160 "-Xbootclasspath/a:.",
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161 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
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162 "-cp", System.getProperty("java.class.path"),
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163 };
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164
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165 if (useTestDotJavaDotOpts) {
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166 // System.getProperty("test.java.opts") is '' if no options is set,
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167 // we need to skip such a result
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168 String[] externalVMOpts = new String[0];
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169 if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
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170 externalVMOpts = System.getProperty("test.java.opts").split(" ");
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171 }
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172 finalargs.addAll(Arrays.asList(externalVMOpts));
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173 }
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174
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175 finalargs.addAll(Arrays.asList(vmargs));
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176 finalargs.addAll(Arrays.asList(whiteboxOpts));
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177 finalargs.add(classname);
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178 finalargs.addAll(Arrays.asList(arguments));
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179
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180 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
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181 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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182 output.shouldHaveExitValue(0);
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183
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184 return output;
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185 }
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186
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187 private static void getMinInitialMaxHeap(String[] args, MinInitialMaxValues val) throws Exception {
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188 OutputAnalyzer output = runWhiteBoxTest(args, ErgoArgsPrinter.class.getName(), new String[] {}, false);
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189
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190 // the output we watch for has the following format:
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191 //
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192 // "Minimum heap X Initial heap Y Maximum heap Z Min alignment A Max Alignment B"
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193 //
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194 // where A, B, X, Y and Z are sizes in bytes.
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195 // Unfortunately there is no other way to retrieve the minimum heap size and
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196 // the alignments.
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197
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198 Matcher m = Pattern.compile("Minimum heap \\d+ Initial heap \\d+ Maximum heap \\d+ Min alignment \\d+ Max alignment \\d+").
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199 matcher(output.getStdout());
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200 if (!m.find()) {
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201 throw new RuntimeException("Could not find heap size string.");
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202 }
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203
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204 String match = m.group();
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205
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206 // actual values
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207 val.minHeapSize = valueAfter(match, "Minimum heap ");
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208 val.initialHeapSize = valueAfter(match, "Initial heap ");
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209 val.maxHeapSize = valueAfter(match, "Maximum heap ");
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210 val.minAlignment = valueAfter(match, "Min alignment ");
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211 val.maxAlignment = valueAfter(match, "Max alignment ");
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212 }
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213
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214 /**
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215 * Verify whether the VM automatically synchronizes minimum and initial heap size if only
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216 * one is given for the GC specified.
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217 */
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218 public static void checkErgonomics(String[] args, long[] newoldsize,
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219 long expectedMin, long expectedInitial) throws Exception {
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220
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221 MinInitialMaxValues v = new MinInitialMaxValues();
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222 getMinInitialMaxHeap(args, v);
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223
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224 if ((expectedMin != -1) && (align_up(expectedMin, v.minAlignment) != v.minHeapSize)) {
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225 throw new RuntimeException("Actual minimum heap size of " + v.minHeapSize +
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226 " differs from expected minimum heap size of " + expectedMin);
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227 }
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228
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229 if ((expectedInitial != -1) && (align_up(expectedInitial, v.minAlignment) != v.initialHeapSize)) {
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230 throw new RuntimeException("Actual initial heap size of " + v.initialHeapSize +
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231 " differs from expected initial heap size of " + expectedInitial);
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232 }
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233
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234 // always check the invariant min <= initial <= max heap size
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235 if (!(v.minHeapSize <= v.initialHeapSize && v.initialHeapSize <= v.maxHeapSize)) {
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236 throw new RuntimeException("Inconsistent min/initial/max heap sizes, they are " +
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237 v.minHeapSize + "/" + v.initialHeapSize + "/" + v.maxHeapSize);
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238 }
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239 }
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240
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241 /**
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242 * Verify whether the VM respects the given maximum heap size in MB for the
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243 * GC specified.
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244 * @param gcflag The garbage collector to test as command line flag. E.g. -XX:+UseG1GC
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245 * @param maxHeapSize the maximum heap size to verify, in MB.
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246 */
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247 public static void checkGenMaxHeapSize(String gcflag, long maxHeapsize) throws Exception {
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248 final long K = 1024;
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249
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250 MinInitialMaxValues v = new MinInitialMaxValues();
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251 getMinInitialMaxHeap(new String[] { gcflag, "-XX:MaxHeapSize=" + maxHeapsize + "M" }, v);
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252
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253 long expectedHeapSize = align_up(maxHeapsize * K * K, v.maxAlignment);
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254 long actualHeapSize = v.maxHeapSize;
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255
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256 if (actualHeapSize > expectedHeapSize) {
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257 throw new RuntimeException("Heap has " + actualHeapSize +
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258 " bytes, expected to be less than " + expectedHeapSize);
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259 }
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260 }
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261
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262 private static long getFlagValue(String flag, String where) {
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263 Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);
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264 if (!m.find()) {
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265 throw new RuntimeException("Could not find value for flag " + flag + " in output string");
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266 }
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267 String match = m.group();
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268 return Long.parseLong(match.substring(match.lastIndexOf(" ") + 1, match.length()));
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269 }
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270
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271 private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception {
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272 if (contains) {
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273 output.shouldContain(message);
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274 } else {
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275 output.shouldNotContain(message);
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276 }
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277 }
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278
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279 private static void expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception {
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280 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);
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281 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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282 shouldContainOrNot(output, hasWarning, "Warning");
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283 shouldContainOrNot(output, hasError, "Error");
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284 output.shouldHaveExitValue(errorcode);
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285 }
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286
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287 private static void expectError(String[] flags) throws Exception {
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288 expect(flags, false, true, 1);
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289 }
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290
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291 private static void expectValid(String[] flags) throws Exception {
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292 expect(flags, false, false, 0);
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293 }
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294 }
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295
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