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annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotVMConfigStore.java @ 23679:b5557b757040

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fix HotSpotVMConfig startup performance (JDK-8159167)
author Doug Simon <doug.simon@oracle.com>
date Wed, 15 Jun 2016 00:00:41 +0200
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b5557b757040 fix HotSpotVMConfig startup performance (JDK-8159167)
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1 /*
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2 * Copyright (c) 2016, 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 package jdk.vm.ci.hotspot;
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24
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25 import static jdk.vm.ci.common.InitTimer.timer;
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26
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27 import java.util.Collections;
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28 import java.util.HashMap;
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29 import java.util.Map;
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30
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31 import jdk.vm.ci.common.InitTimer;
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32
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33 /**
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34 * Access to VM configuration data.
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35 */
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36 public final class HotSpotVMConfigStore {
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37
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38 /**
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39 * Gets the C++ symbols whose addresses are exposed by this object.
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40 *
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41 * @return an unmodifiable map from the symbol names to their addresses
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42 */
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43 public Map<String, Long> getAddresses() {
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44 return Collections.unmodifiableMap(vmAddresses);
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45 }
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46
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47 /**
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48 * Gets the C++ type sizes exposed by this object.
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49 *
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50 * @return an unmodifiable map from C++ type names to their sizes in bytes
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51 */
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52 public Map<String, Long> getTypeSizes() {
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53 return Collections.unmodifiableMap(vmTypeSizes);
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54 }
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55
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56 /**
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57 * Gets the C++ constants exposed by this object.
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58 *
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59 * @return an unmodifiable map from the names of C++ constants to their values
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60 */
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61 public Map<String, Long> getConstants() {
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62 return Collections.unmodifiableMap(vmConstants);
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63 }
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64
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65 /**
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66 * Gets the VM flags exposed by this object.
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67 *
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68 * @return an unmodifiable map from VM flag names to {@link VMFlag} objects
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69 */
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70 public Map<String, VMFlag> getFlags() {
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71 return Collections.unmodifiableMap(vmFlags);
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72 }
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73
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74 /**
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75 * Gets the C++ fields exposed by this object.
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76 *
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77 * @return an unmodifiable map from VM field names to {@link VMField} objects
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78 */
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79 public Map<String, VMField> getFields() {
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80 return Collections.unmodifiableMap(vmFields);
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81 }
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82
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83 final HashMap<String, VMField> vmFields;
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84 final HashMap<String, Long> vmTypeSizes;
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85 final HashMap<String, Long> vmConstants;
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86 final HashMap<String, Long> vmAddresses;
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87 final HashMap<String, VMFlag> vmFlags;
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88
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89 /**
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90 * Reads the database of VM info. The return value encodes the info in a nested object array
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91 * that is described by the pseudo Java object {@code info} below:
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92 *
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93 * <pre>
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94 * info = [
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95 * VMField[] vmFields,
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96 * [String name, Long size, ...] vmTypeSizes,
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97 * [String name, Long value, ...] vmConstants,
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98 * [String name, Long value, ...] vmAddresses,
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99 * VMFlag[] vmFlags
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100 * ]
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101 * </pre>
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102 */
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103 @SuppressWarnings("try")
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104 HotSpotVMConfigStore(CompilerToVM compilerToVm) {
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105 Object[] data;
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106 try (InitTimer t = timer("CompilerToVm readConfiguration")) {
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107 data = compilerToVm.readConfiguration();
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108 }
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109 assert data.length == 5;
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110
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111 // @formatter:off
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112 VMField[] vmFieldsInfo = (VMField[]) data[0];
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113 Object[] vmTypesSizesInfo = (Object[]) data[1];
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114 Object[] vmConstantsInfo = (Object[]) data[2];
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115 Object[] vmAddressesInfo = (Object[]) data[3];
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116 VMFlag[] vmFlagsInfo = (VMFlag[]) data[4];
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117
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118 vmFields = new HashMap<>(vmFieldsInfo.length);
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119 vmTypeSizes = new HashMap<>(vmTypesSizesInfo.length);
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120 vmConstants = new HashMap<>(vmConstantsInfo.length);
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121 vmAddresses = new HashMap<>(vmAddressesInfo.length);
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122 vmFlags = new HashMap<>(vmFlagsInfo.length);
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123 // @formatter:on
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124
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125 try (InitTimer t = timer("HotSpotVMConfigAccess<init> fill maps")) {
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126 for (VMField vmField : vmFieldsInfo) {
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127 vmFields.put(vmField.name, vmField);
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128 }
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129
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130 for (int i = 0; i < vmTypesSizesInfo.length / 2; i++) {
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131 String name = (String) vmTypesSizesInfo[i * 2];
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132 Long size = (Long) vmTypesSizesInfo[i * 2 + 1];
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133 vmTypeSizes.put(name, size);
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134 }
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135
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136 for (int i = 0; i < vmConstantsInfo.length / 2; i++) {
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137 String name = (String) vmConstantsInfo[i * 2];
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138 Long value = (Long) vmConstantsInfo[i * 2 + 1];
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139 vmConstants.put(name, value);
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140 }
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141
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142 for (int i = 0; i < vmAddressesInfo.length / 2; i++) {
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143 String name = (String) vmAddressesInfo[i * 2];
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144 Long value = (Long) vmAddressesInfo[i * 2 + 1];
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145 vmAddresses.put(name, value);
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146 }
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147
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148 for (VMFlag vmFlag : vmFlagsInfo) {
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149 vmFlags.put(vmFlag.name, vmFlag);
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150 }
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151 }
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152 }
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153
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154 @Override
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155 public String toString() {
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156 return getClass().getSimpleName();
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157 }
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158 }