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annotate test/gc/g1/TestHumongousCodeCacheRoots.java @ 13062:28674af341ac

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8027756: assert(!hr->isHumongous()) failed: code root in humongous region? Summary: Change checks for isHumongous() to continuesHumongous() as installing a code root for a humongous object is valid, but not for continuations of humongous objects. Cleaned up asserts. Reviewed-by: jmasa, tamao
author tschatzl
date Thu, 07 Nov 2013 15:17:10 +0100
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13062
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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