Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMetaAccessProvider.java @ 23738:1140503536ae jvmci-0.19
Backport style fixes and comments from jdk9.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Fri, 12 Aug 2016 11:07:39 +0200 |
parents | 1d4ce2d19e52 |
children | d6bd0b9cd0b6 |
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1 /* |
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2 * Copyright (c) 2011, 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.hotspot.HotSpotJVMCIRuntimeProvider.getArrayBaseOffset; |
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26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayIndexScale; |
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27 import static jdk.vm.ci.hotspot.HotSpotResolvedObjectTypeImpl.fromObjectClass; |
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28 import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; |
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30 import java.lang.reflect.Array; |
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31 import java.lang.reflect.Constructor; |
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32 import java.lang.reflect.Executable; |
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33 import java.lang.reflect.Field; |
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34 import java.lang.reflect.Method; |
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35 import java.lang.reflect.Modifier; |
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36 |
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37 import jdk.vm.ci.code.CodeUtil; |
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38 import jdk.vm.ci.code.TargetDescription; |
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39 import jdk.vm.ci.common.JVMCIError; |
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40 import jdk.vm.ci.meta.DeoptimizationAction; |
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41 import jdk.vm.ci.meta.DeoptimizationReason; |
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42 import jdk.vm.ci.meta.JavaConstant; |
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43 import jdk.vm.ci.meta.JavaKind; |
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44 import jdk.vm.ci.meta.MetaAccessProvider; |
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45 import jdk.vm.ci.meta.ResolvedJavaField; |
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46 import jdk.vm.ci.meta.ResolvedJavaMethod; |
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47 import jdk.vm.ci.meta.ResolvedJavaType; |
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48 import jdk.vm.ci.meta.Signature; |
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49 |
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50 // JaCoCo Exclude |
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51 |
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52 /** |
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53 * HotSpot implementation of {@link MetaAccessProvider}. |
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54 */ |
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55 public class HotSpotMetaAccessProvider implements MetaAccessProvider { |
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56 |
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57 protected final HotSpotJVMCIRuntimeProvider runtime; |
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58 |
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59 public HotSpotMetaAccessProvider(HotSpotJVMCIRuntimeProvider runtime) { |
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60 this.runtime = runtime; |
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61 } |
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62 |
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63 public ResolvedJavaType lookupJavaType(Class<?> clazz) { |
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64 if (clazz == null) { |
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65 throw new IllegalArgumentException("Class parameter was null"); |
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66 } |
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67 return runtime.fromClass(clazz); |
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68 } |
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69 |
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70 public HotSpotResolvedObjectType lookupJavaType(JavaConstant constant) { |
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71 if (constant.isNull() || !(constant instanceof HotSpotObjectConstant)) { |
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72 return null; |
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73 } |
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74 return ((HotSpotObjectConstant) constant).getType(); |
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75 } |
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76 |
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77 public Signature parseMethodDescriptor(String signature) { |
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78 return new HotSpotSignature(runtime, signature); |
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79 } |
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80 |
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81 /** |
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82 * {@link Field} object of {@link Method#slot}. |
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83 */ |
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84 private Field reflectionMethodSlot = getReflectionSlotField(Method.class); |
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85 |
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86 /** |
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87 * {@link Field} object of {@link Constructor#slot}. |
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88 */ |
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89 private Field reflectionConstructorSlot = getReflectionSlotField(Constructor.class); |
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90 |
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91 private static Field getReflectionSlotField(Class<?> reflectionClass) { |
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92 try { |
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93 Field field = reflectionClass.getDeclaredField("slot"); |
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94 field.setAccessible(true); |
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95 return field; |
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96 } catch (NoSuchFieldException | SecurityException e) { |
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97 throw new JVMCIError(e); |
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98 } |
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99 } |
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100 |
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101 public ResolvedJavaMethod lookupJavaMethod(Executable reflectionMethod) { |
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102 try { |
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103 Class<?> holder = reflectionMethod.getDeclaringClass(); |
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104 Field slotField = reflectionMethod instanceof Constructor ? reflectionConstructorSlot : reflectionMethodSlot; |
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105 final int slot = slotField.getInt(reflectionMethod); |
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106 return runtime.getCompilerToVM().getResolvedJavaMethodAtSlot(holder, slot); |
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107 } catch (IllegalArgumentException | IllegalAccessException e) { |
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108 throw new JVMCIError(e); |
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109 } |
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110 } |
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111 |
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112 public ResolvedJavaField lookupJavaField(Field reflectionField) { |
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113 Class<?> fieldHolder = reflectionField.getDeclaringClass(); |
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115 HotSpotResolvedObjectType holder = fromObjectClass(fieldHolder); |
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116 if (Modifier.isStatic(reflectionField.getModifiers())) { |
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117 final long offset = UNSAFE.staticFieldOffset(reflectionField); |
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118 for (ResolvedJavaField field : holder.getStaticFields()) { |
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119 if (offset == ((HotSpotResolvedJavaField) field).offset()) { |
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120 return field; |
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121 } |
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122 } |
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123 } else { |
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124 final long offset = UNSAFE.objectFieldOffset(reflectionField); |
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125 for (ResolvedJavaField field : holder.getInstanceFields(false)) { |
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126 if (offset == ((HotSpotResolvedJavaField) field).offset()) { |
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127 return field; |
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128 } |
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129 } |
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130 } |
13263 | 131 |
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132 throw new JVMCIError("unresolved field %s", reflectionField); |
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133 } |
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134 |
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135 private static int intMaskRight(int n) { |
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136 assert n <= 32; |
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137 return n == 32 ? -1 : (1 << n) - 1; |
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138 } |
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139 |
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140 @Override |
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141 public JavaConstant encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason, int debugId) { |
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142 HotSpotVMConfig config = runtime.getConfig(); |
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143 int actionValue = convertDeoptAction(action); |
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144 int reasonValue = convertDeoptReason(reason); |
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145 int debugValue = debugId & intMaskRight(config.deoptimizationDebugIdBits); |
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146 JavaConstant c = JavaConstant.forInt( |
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147 ~((debugValue << config.deoptimizationDebugIdShift) | (reasonValue << config.deoptimizationReasonShift) | (actionValue << config.deoptimizationActionShift))); |
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148 assert c.asInt() < 0; |
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149 return c; |
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150 } |
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151 |
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152 public DeoptimizationReason decodeDeoptReason(JavaConstant constant) { |
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153 HotSpotVMConfig config = runtime.getConfig(); |
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154 int reasonValue = ((~constant.asInt()) >> config.deoptimizationReasonShift) & intMaskRight(config.deoptimizationReasonBits); |
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155 DeoptimizationReason reason = convertDeoptReason(reasonValue); |
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156 return reason; |
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157 } |
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158 |
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159 public DeoptimizationAction decodeDeoptAction(JavaConstant constant) { |
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160 HotSpotVMConfig config = runtime.getConfig(); |
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161 int actionValue = ((~constant.asInt()) >> config.deoptimizationActionShift) & intMaskRight(config.deoptimizationActionBits); |
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162 DeoptimizationAction action = convertDeoptAction(actionValue); |
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163 return action; |
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164 } |
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165 |
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166 public int decodeDebugId(JavaConstant constant) { |
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167 HotSpotVMConfig config = runtime.getConfig(); |
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168 return ((~constant.asInt()) >> config.deoptimizationDebugIdShift) & intMaskRight(config.deoptimizationDebugIdBits); |
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169 } |
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170 |
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171 public int convertDeoptAction(DeoptimizationAction action) { |
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172 HotSpotVMConfig config = runtime.getConfig(); |
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173 switch (action) { |
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174 case None: |
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175 return config.deoptActionNone; |
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176 case RecompileIfTooManyDeopts: |
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177 return config.deoptActionMaybeRecompile; |
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178 case InvalidateReprofile: |
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179 return config.deoptActionReinterpret; |
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180 case InvalidateRecompile: |
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181 return config.deoptActionMakeNotEntrant; |
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182 case InvalidateStopCompiling: |
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183 return config.deoptActionMakeNotCompilable; |
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184 default: |
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185 throw new JVMCIError("%s", action); |
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186 } |
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187 } |
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188 |
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189 public DeoptimizationAction convertDeoptAction(int action) { |
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190 HotSpotVMConfig config = runtime.getConfig(); |
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191 if (action == config.deoptActionNone) { |
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192 return DeoptimizationAction.None; |
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193 } |
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194 if (action == config.deoptActionMaybeRecompile) { |
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195 return DeoptimizationAction.RecompileIfTooManyDeopts; |
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196 } |
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197 if (action == config.deoptActionReinterpret) { |
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198 return DeoptimizationAction.InvalidateReprofile; |
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199 } |
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200 if (action == config.deoptActionMakeNotEntrant) { |
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201 return DeoptimizationAction.InvalidateRecompile; |
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202 } |
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203 if (action == config.deoptActionMakeNotCompilable) { |
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204 return DeoptimizationAction.InvalidateStopCompiling; |
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205 } |
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206 throw new JVMCIError("%d", action); |
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207 } |
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208 |
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209 public int convertDeoptReason(DeoptimizationReason reason) { |
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210 HotSpotVMConfig config = runtime.getConfig(); |
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211 switch (reason) { |
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212 case None: |
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213 return config.deoptReasonNone; |
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214 case NullCheckException: |
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215 return config.deoptReasonNullCheck; |
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216 case BoundsCheckException: |
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217 return config.deoptReasonRangeCheck; |
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218 case ClassCastException: |
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219 return config.deoptReasonClassCheck; |
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220 case ArrayStoreException: |
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221 return config.deoptReasonArrayCheck; |
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222 case UnreachedCode: |
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223 return config.deoptReasonUnreached0; |
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224 case TypeCheckedInliningViolated: |
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225 return config.deoptReasonTypeCheckInlining; |
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226 case OptimizedTypeCheckViolated: |
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227 return config.deoptReasonOptimizedTypeCheck; |
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228 case NotCompiledExceptionHandler: |
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229 return config.deoptReasonNotCompiledExceptionHandler; |
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230 case Unresolved: |
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231 return config.deoptReasonUnresolved; |
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232 case JavaSubroutineMismatch: |
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233 return config.deoptReasonJsrMismatch; |
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234 case ArithmeticException: |
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235 return config.deoptReasonDiv0Check; |
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236 case RuntimeConstraint: |
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237 return config.deoptReasonConstraint; |
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238 case LoopLimitCheck: |
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239 return config.deoptReasonLoopLimitCheck; |
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240 case Aliasing: |
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241 return config.deoptReasonAliasing; |
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242 case TransferToInterpreter: |
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243 return config.deoptReasonTransferToInterpreter; |
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244 default: |
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245 throw new JVMCIError("%s", reason); |
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246 } |
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247 } |
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248 |
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249 public DeoptimizationReason convertDeoptReason(int reason) { |
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250 HotSpotVMConfig config = runtime.getConfig(); |
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251 if (reason == config.deoptReasonNone) { |
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252 return DeoptimizationReason.None; |
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253 } |
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254 if (reason == config.deoptReasonNullCheck) { |
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255 return DeoptimizationReason.NullCheckException; |
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256 } |
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257 if (reason == config.deoptReasonRangeCheck) { |
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258 return DeoptimizationReason.BoundsCheckException; |
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259 } |
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260 if (reason == config.deoptReasonClassCheck) { |
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261 return DeoptimizationReason.ClassCastException; |
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262 } |
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263 if (reason == config.deoptReasonArrayCheck) { |
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264 return DeoptimizationReason.ArrayStoreException; |
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265 } |
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266 if (reason == config.deoptReasonUnreached0) { |
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267 return DeoptimizationReason.UnreachedCode; |
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268 } |
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269 if (reason == config.deoptReasonTypeCheckInlining) { |
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270 return DeoptimizationReason.TypeCheckedInliningViolated; |
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271 } |
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272 if (reason == config.deoptReasonOptimizedTypeCheck) { |
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273 return DeoptimizationReason.OptimizedTypeCheckViolated; |
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274 } |
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275 if (reason == config.deoptReasonNotCompiledExceptionHandler) { |
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276 return DeoptimizationReason.NotCompiledExceptionHandler; |
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277 } |
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278 if (reason == config.deoptReasonUnresolved) { |
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279 return DeoptimizationReason.Unresolved; |
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280 } |
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281 if (reason == config.deoptReasonJsrMismatch) { |
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282 return DeoptimizationReason.JavaSubroutineMismatch; |
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283 } |
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284 if (reason == config.deoptReasonDiv0Check) { |
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285 return DeoptimizationReason.ArithmeticException; |
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286 } |
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287 if (reason == config.deoptReasonConstraint) { |
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288 return DeoptimizationReason.RuntimeConstraint; |
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289 } |
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290 if (reason == config.deoptReasonLoopLimitCheck) { |
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291 return DeoptimizationReason.LoopLimitCheck; |
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292 } |
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293 if (reason == config.deoptReasonAliasing) { |
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294 return DeoptimizationReason.Aliasing; |
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295 } |
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296 if (reason == config.deoptReasonTransferToInterpreter) { |
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297 return DeoptimizationReason.TransferToInterpreter; |
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298 } |
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299 throw new JVMCIError("%x", reason); |
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300 } |
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301 |
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302 @Override |
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303 public long getMemorySize(JavaConstant constant) { |
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304 if (constant.getJavaKind() == JavaKind.Object) { |
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305 HotSpotResolvedObjectType lookupJavaType = lookupJavaType(constant); |
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306 |
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307 if (lookupJavaType == null) { |
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308 return 0; |
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309 } else { |
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310 if (lookupJavaType.isArray()) { |
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311 int length = Array.getLength(((HotSpotObjectConstantImpl) constant).object()); |
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312 ResolvedJavaType elementType = lookupJavaType.getComponentType(); |
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313 JavaKind elementKind = elementType.getJavaKind(); |
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314 final int headerSize = getArrayBaseOffset(elementKind); |
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315 TargetDescription target = runtime.getHostJVMCIBackend().getTarget(); |
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316 int sizeOfElement = getArrayIndexScale(elementKind); |
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317 int alignment = target.wordSize; |
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318 int log2ElementSize = CodeUtil.log2(sizeOfElement); |
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319 return computeArrayAllocationSize(length, alignment, headerSize, log2ElementSize); |
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320 } |
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321 return lookupJavaType.instanceSize(); |
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322 } |
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323 } else { |
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324 return constant.getJavaKind().getByteCount(); |
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325 } |
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326 } |
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327 |
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328 /** |
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329 * Computes the size of the memory chunk allocated for an array. This size accounts for the |
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330 * array header size, body size and any padding after the last element to satisfy object |
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331 * alignment requirements. |
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332 * |
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333 * @param length the number of elements in the array |
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334 * @param alignment the object alignment requirement |
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335 * @param headerSize the size of the array header |
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336 * @param log2ElementSize log2 of the size of an element in the array |
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337 */ |
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338 public static int computeArrayAllocationSize(int length, int alignment, int headerSize, int log2ElementSize) { |
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339 int size = (length << log2ElementSize) + headerSize + (alignment - 1); |
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340 int mask = ~(alignment - 1); |
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341 return size & mask; |
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342 } |
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343 } |