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annotate test/compiler/8010927/Test8010927.java @ 12986:1b422ef5288a

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8025728: Missing volatile specifier for field G1AllocRegion::_alloc_region Summary: The field G1AllocRegion::_alloc_region needs to be declared volatile as it is used with that intention. Otherwise the compiler may generate the code that reloads the value which might have changed in the meantime, leading to spurious crashes. Reviewed-by: iveresov, simonis, tschatzl Contributed-by: Axel Siebenborn <axel.siebenborn@sap.com>
author tschatzl
date Wed, 23 Oct 2013 10:23:06 +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 }