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annotate test/gc/g1/TestHumongousCodeCacheRoots.java @ 20304:a22acf6d7598

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8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents 28674af341ac
children
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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 /*
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25 * @test
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26 * @key regression
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27 * @key gc
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28 * @bug 8027756
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29 * @library /testlibrary /testlibrary/whitebox
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30 * @build TestHumongousCodeCacheRoots
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31 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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32 * @summary Humongous objects may have references from the code cache
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33 * @run main TestHumongousCodeCacheRoots
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34 */
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35
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36 import com.oracle.java.testlibrary.*;
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37 import sun.hotspot.WhiteBox;
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38
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39 import java.util.ArrayList;
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40 import java.util.Arrays;
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41
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42 class TestHumongousCodeCacheRootsHelper {
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43
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44 static final int n = 1000000;
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45 static final int[] AA = new int[n];
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46 static final int[] BB = new int[n];
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47
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48 public static void main(String args[]) throws Exception {
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49 // do some work so that the compiler compiles this method, inlining the
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50 // reference to the integer array (which is a humonguous object) into
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51 // the code cache.
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52 for(int i = 0; i < n; i++) {
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53 AA[i] = 0;
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54 BB[i] = 0;
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55 }
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56 // trigger a GC that checks that the verification code allows humongous
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57 // objects with code cache roots; objects should be all live here.
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58 System.gc();
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59
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60 // deoptimize everyhing: this should make all compiled code zombies.
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61 WhiteBox wb = WhiteBox.getWhiteBox();
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62 wb.deoptimizeAll();
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63
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64 // trigger a GC that checks that the verification code allows humongous
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65 // objects with code cache roots; objects should be all live here.
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66 System.gc();
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67
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68 // wait a little for the code cache sweeper to try to clean up zombie nmethods
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69 // and unregister the code roots.
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70 try { Thread.sleep(5000); } catch (InterruptedException ex) { }
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71
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72 // do some work on the arrays to make sure that they need to be live after the GCs
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73 for(int i = 0; i < n; i++) {
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74 AA[i] = 1;
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75 BB[i] = 10;
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76 }
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77
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78 System.out.println();
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79 }
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80 }
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81
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82 public class TestHumongousCodeCacheRoots {
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83
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84 /**
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85 * Executes a class in a new VM process with the given parameters.
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86 * @param vmargs Arguments to the VM to run
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87 * @param classname Name of the class to run
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88 * @param arguments Arguments to the class
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89 * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string
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90 * @return The OutputAnalyzer with the results for the invocation.
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91 */
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92 public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {
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93 ArrayList<String> finalargs = new ArrayList<String>();
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94
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95 String[] whiteboxOpts = new String[] {
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96 "-Xbootclasspath/a:.",
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97 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
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98 "-cp", System.getProperty("java.class.path"),
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99 };
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100
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101 if (useTestDotJavaDotOpts) {
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102 // System.getProperty("test.java.opts") is '' if no options is set,
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103 // we need to skip such a result
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104 String[] externalVMOpts = new String[0];
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105 if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
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106 externalVMOpts = System.getProperty("test.java.opts").split(" ");
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107 }
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108 finalargs.addAll(Arrays.asList(externalVMOpts));
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109 }
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110
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111 finalargs.addAll(Arrays.asList(vmargs));
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112 finalargs.addAll(Arrays.asList(whiteboxOpts));
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113 finalargs.add(classname);
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114 finalargs.addAll(Arrays.asList(arguments));
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115
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116 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
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117 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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118 output.shouldHaveExitValue(0);
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119
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120 return output;
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121 }
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122
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123 public static void runTest(String compiler, String[] other) throws Exception {
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124 ArrayList<String> joined = new ArrayList<String>();
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125 joined.add(compiler);
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126 joined.addAll(Arrays.asList(other));
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127 runWhiteBoxTest(joined.toArray(new String[0]), TestHumongousCodeCacheRootsHelper.class.getName(),
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128 new String[] {}, false);
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129 }
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130
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131 public static void main(String[] args) throws Exception {
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132 final String[] baseArguments = new String[] {
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133 "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region
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134 "-XX:+UnlockDiagnosticVMOptions",
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135 "-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking
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136 "-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run
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137 "-XX:NmethodSweepFraction=1", "-XX:NmethodSweepCheckInterval=1", // make the code cache sweep more predictable
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138 };
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139 runTest("-client", baseArguments);
28674af341ac 8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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140 runTest("-server", baseArguments);
28674af341ac 8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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141 }
28674af341ac 8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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142 }
28674af341ac 8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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143