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annotate test/compiler/8010927/Test8010927.java @ 12235:d6c266999345

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8023476: Metaspace capacity > reserved Reviewed-by: stefank, hseigel, mgerdin
author ehelin
date Thu, 12 Sep 2013 10:15:30 +0200
parents 3f281b313240
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 * @bug 8010927
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27 * @summary Kitchensink crashed with SIGSEGV, Problematic frame: v ~StubRoutines::checkcast_arraycopy
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28 * @library /testlibrary/whitebox /testlibrary
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29 * @build Test8010927
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30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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31 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. -Xmx64m -XX:NewSize=20971520 -XX:MaxNewSize=32m -XX:-UseTLAB -XX:-UseParNewGC -XX:-UseAdaptiveSizePolicy Test8010927
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32 */
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33
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34 import sun.hotspot.WhiteBox;
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35 import java.lang.reflect.Field;
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36 import sun.misc.Unsafe;
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37
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38 /**
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39 * The test creates uncommitted space between oldgen and young gen
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40 * by specifying MaxNewSize bigger than NewSize.
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41 * NewSize = 20971520 = (512*4K) * 10 for 4k pages
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42 * Then it tries to execute arraycopy() with elements type check
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43 * to the array at the end of survive space near unused space.
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44 */
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45
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46 public class Test8010927 {
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47
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48 private static final Unsafe U;
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49
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50 static {
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51 try {
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52 Field unsafe = Unsafe.class.getDeclaredField("theUnsafe");
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53 unsafe.setAccessible(true);
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54 U = (Unsafe) unsafe.get(null);
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55 } catch (Exception e) {
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56 throw new Error(e);
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57 }
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58 }
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59
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60 public static Object[] o;
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61
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62 public static final boolean debug = Boolean.getBoolean("debug");
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63
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64 // 2 different obect arrays but same element types
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65 static Test8010927[] masterA;
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66 static Object[] masterB;
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67 static final Test8010927 elem = new Test8010927();
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68 static final WhiteBox wb = WhiteBox.getWhiteBox();
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69
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70 static final int obj_header_size = U.ARRAY_OBJECT_BASE_OFFSET;
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71 static final int heap_oop_size = wb.getHeapOopSize();
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72 static final int card_size = 512;
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73 static final int one_card = (card_size - obj_header_size)/heap_oop_size;
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74
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75 static final int surv_size = 2112 * 1024;
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76
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77 // The size is big to not fit into survive space.
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78 static final Object[] cache = new Object[(surv_size / card_size)];
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79
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80 public static void main(String[] args) {
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81 masterA = new Test8010927[one_card];
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82 masterB = new Object[one_card];
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83 for (int i = 0; i < one_card; ++i) {
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84 masterA[i] = elem;
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85 masterB[i] = elem;
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86 }
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87
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88 // Move cache[] to the old gen.
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89 long low_limit = wb.getObjectAddress(cache);
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90 System.gc();
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91 // Move 'cache' to oldgen.
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92 long upper_limit = wb.getObjectAddress(cache);
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93 if ((low_limit - upper_limit) > 0) { // substaction works with unsigned values
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94 // OldGen is placed before youngger for ParallelOldGC.
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95 upper_limit = low_limit + 21000000l; // +20971520
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96 }
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97 // Each A[one_card] size is 512 bytes,
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98 // it will take about 40000 allocations to trigger GC.
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99 // cache[] has 8192 elements so GC should happen
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100 // each 5th iteration.
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101 for(long l = 0; l < 20; l++) {
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102 fill_heap();
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103 if (debug) {
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104 System.out.println("test oop_disjoint_arraycopy");
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105 }
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106 testA_arraycopy();
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107 if (debug) {
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108 System.out.println("test checkcast_arraycopy");
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109 }
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110 testB_arraycopy();
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111 // Execute arraycopy to the topmost array in young gen
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112 if (debug) {
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113 int top_index = get_top_address(low_limit, upper_limit);
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114 if (top_index >= 0) {
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115 long addr = wb.getObjectAddress(cache[top_index]);
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116 System.out.println("top_addr: 0x" + Long.toHexString(addr) + ", 0x" + Long.toHexString(addr + 512));
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117 }
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118 }
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119 }
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120 }
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121 static void fill_heap() {
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122 for (int i = 0; i < cache.length; ++i) {
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123 o = new Test8010927[one_card];
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124 System.arraycopy(masterA, 0, o, 0, masterA.length);
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125 cache[i] = o;
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126 }
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127 for (long j = 0; j < 256; ++j) {
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128 o = new Long[10000]; // to trigger GC
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129 }
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130 }
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131 static void testA_arraycopy() {
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132 for (int i = 0; i < cache.length; ++i) {
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133 System.arraycopy(masterA, 0, cache[i], 0, masterA.length);
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134 }
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135 }
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136 static void testB_arraycopy() {
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137 for (int i = 0; i < cache.length; ++i) {
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138 System.arraycopy(masterB, 0, cache[i], 0, masterB.length);
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139 }
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140 }
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141 static int get_top_address(long min, long max) {
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142 int index = -1;
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143 long addr = min;
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144 for (int i = 0; i < cache.length; ++i) {
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145 long test = wb.getObjectAddress(cache[i]);
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146 if (((test - addr) > 0) && ((max - test) > 0)) { // substaction works with unsigned values
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147 addr = test;
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148 index = i;
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149 }
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150 }
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151 return index;
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152 }
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153 }