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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotMemoryAccessProviderImpl.java @ 21539:d3002f7bd223

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renamed com.oracle.graal.service.processor to com.oracle.jvmci.runtime.processor (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Mon, 25 May 2015 17:34:32 +0200
parents 07b088d61d5d
children
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1 /*
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2 * Copyright (c) 2011, 2015, 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
5124eeec1a7b split HotSpotRuntime into separate provider implementations
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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
5124eeec1a7b split HotSpotRuntime into separate provider implementations
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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
5124eeec1a7b split HotSpotRuntime into separate provider implementations
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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 com.oracle.graal.hotspot.jvmci;
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24
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25 import static com.oracle.graal.compiler.common.UnsafeAccess.*;
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26
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27 import com.oracle.graal.api.code.*;
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28 import com.oracle.graal.api.meta.*;
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29 import com.oracle.graal.compiler.common.*;
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30 import com.oracle.graal.hotspot.jvmci.HotSpotVMConfig.CompressEncoding;
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31
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32 /**
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33 * HotSpot implementation of {@link MemoryAccessProvider}.
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34 */
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35 public class HotSpotMemoryAccessProviderImpl implements HotSpotMemoryAccessProvider, HotSpotProxified {
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36
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37 protected final HotSpotJVMCIRuntimeProvider runtime;
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38
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39 public HotSpotMemoryAccessProviderImpl(HotSpotJVMCIRuntimeProvider runtime) {
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40 this.runtime = runtime;
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41 }
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42
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43 private static Object asObject(Constant base) {
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44 if (base instanceof HotSpotObjectConstantImpl) {
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45 return ((HotSpotObjectConstantImpl) base).object();
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46 } else {
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47 return null;
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48 }
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49 }
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50
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51 private boolean isValidObjectFieldDisplacement(Constant base, long displacement) {
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52 if (base instanceof HotSpotMetaspaceConstant) {
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53 Object metaspaceObject = HotSpotMetaspaceConstantImpl.getMetaspaceObject(base);
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54 if (metaspaceObject instanceof HotSpotResolvedObjectTypeImpl) {
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55 if (displacement == runtime.getConfig().classMirrorOffset) {
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56 // Klass::_java_mirror is valid for all Klass* values
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57 return true;
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58 } else if (displacement == runtime.getConfig().arrayKlassComponentMirrorOffset) {
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59 // ArrayKlass::_component_mirror is only valid for all ArrayKlass* values
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60 return ((HotSpotResolvedObjectTypeImpl) metaspaceObject).mirror().isArray();
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61 }
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62 } else {
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63 throw GraalInternalError.shouldNotReachHere();
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64 }
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65 }
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66 return false;
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67 }
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68
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69 private static long asRawPointer(Constant base) {
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70 if (base instanceof HotSpotMetaspaceConstant) {
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71 return ((HotSpotMetaspaceConstant) base).rawValue();
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72 } else if (base instanceof PrimitiveConstant) {
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73 PrimitiveConstant prim = (PrimitiveConstant) base;
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74 if (prim.getKind().isNumericInteger()) {
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75 return prim.asLong();
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76 }
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77 }
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78 throw GraalInternalError.shouldNotReachHere();
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79 }
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80
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81 private static long readRawValue(Constant baseConstant, long displacement, int bits) {
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82 Object base = asObject(baseConstant);
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83 if (base != null) {
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84 switch (bits) {
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85 case 8:
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86 return unsafe.getByte(base, displacement);
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87 case 16:
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88 return unsafe.getShort(base, displacement);
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89 case 32:
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90 return unsafe.getInt(base, displacement);
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91 case 64:
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92 return unsafe.getLong(base, displacement);
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93 default:
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94 throw GraalInternalError.shouldNotReachHere();
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95 }
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96 } else {
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97 long pointer = asRawPointer(baseConstant);
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98 switch (bits) {
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99 case 8:
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100 return unsafe.getByte(pointer + displacement);
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101 case 16:
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102 return unsafe.getShort(pointer + displacement);
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103 case 32:
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104 return unsafe.getInt(pointer + displacement);
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105 case 64:
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106 return unsafe.getLong(pointer + displacement);
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107 default:
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108 throw GraalInternalError.shouldNotReachHere();
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109 }
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110 }
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111 }
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112
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113 private boolean verifyReadRawObject(Object expected, Constant base, long displacement, boolean compressed) {
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114 if (compressed == runtime.getConfig().useCompressedOops) {
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115 Object obj = asObject(base);
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116 if (obj != null) {
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117 assert expected == unsafe.getObject(obj, displacement) : "readUnsafeOop doesn't agree with unsafe.getObject";
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118 }
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119 }
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120 if (base instanceof HotSpotMetaspaceConstant) {
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121 Object metaspaceObject = HotSpotMetaspaceConstantImpl.getMetaspaceObject(base);
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122 if (metaspaceObject instanceof HotSpotResolvedObjectTypeImpl) {
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123 if (displacement == runtime.getConfig().classMirrorOffset) {
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124 assert expected == ((HotSpotResolvedObjectTypeImpl) metaspaceObject).mirror();
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125 } else if (displacement == runtime.getConfig().arrayKlassComponentMirrorOffset) {
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126 assert expected == ((HotSpotResolvedObjectTypeImpl) metaspaceObject).mirror().getComponentType();
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127 }
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128 }
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129 }
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130 return true;
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131 }
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132
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133 private Object readRawObject(Constant baseConstant, long initialDisplacement, boolean compressed) {
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134 long displacement = initialDisplacement;
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135
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03b4fa99eff8 rename CompilerToVM.readUnsafeOop to readUncompressedOop and only use it for reading oops in VM data structures since Unsafe.getObject() can be used for other cases
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136 Object ret;
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137 Object base = asObject(baseConstant);
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138 if (base == null) {
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03b4fa99eff8 rename CompilerToVM.readUnsafeOop to readUncompressedOop and only use it for reading oops in VM data structures since Unsafe.getObject() can be used for other cases
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139 assert !compressed;
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140 displacement += asRawPointer(baseConstant);
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03b4fa99eff8 rename CompilerToVM.readUnsafeOop to readUncompressedOop and only use it for reading oops in VM data structures since Unsafe.getObject() can be used for other cases
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141 ret = runtime.getCompilerToVM().readUncompressedOop(displacement);
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142 } else {
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143 assert runtime.getConfig().useCompressedOops == compressed;
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144 ret = unsafe.getObject(base, displacement);
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145 }
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146 assert verifyReadRawObject(ret, baseConstant, initialDisplacement, compressed);
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147 return ret;
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148 }
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149
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150 @Override
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151 public JavaConstant readUnsafeConstant(Kind kind, JavaConstant baseConstant, long displacement) {
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152 if (kind == Kind.Object) {
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153 Object o = readRawObject(baseConstant, displacement, runtime.getConfig().useCompressedOops);
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154 return HotSpotObjectConstantImpl.forObject(o);
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155 } else {
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156 return readPrimitiveConstant(kind, baseConstant, displacement, kind.getByteCount() * 8);
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157 }
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158 }
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159
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160 @Override
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161 public JavaConstant readPrimitiveConstant(Kind kind, Constant baseConstant, long initialDisplacement, int bits) {
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162 try {
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163 long rawValue = readRawValue(baseConstant, initialDisplacement, bits);
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164 switch (kind) {
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165 case Boolean:
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166 return JavaConstant.forBoolean(rawValue != 0);
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167 case Byte:
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168 return JavaConstant.forByte((byte) rawValue);
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169 case Char:
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170 return JavaConstant.forChar((char) rawValue);
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171 case Short:
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172 return JavaConstant.forShort((short) rawValue);
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173 case Int:
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174 return JavaConstant.forInt((int) rawValue);
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175 case Long:
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176 return JavaConstant.forLong(rawValue);
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177 case Float:
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178 return JavaConstant.forFloat(Float.intBitsToFloat((int) rawValue));
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179 case Double:
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180 return JavaConstant.forDouble(Double.longBitsToDouble(rawValue));
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181 default:
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182 throw GraalInternalError.shouldNotReachHere("unsupported kind: " + kind);
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183 }
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184 } catch (NullPointerException e) {
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185 return null;
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186 }
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187 }
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188
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189 @Override
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190 public JavaConstant readObjectConstant(Constant base, long displacement) {
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191 if (!isValidObjectFieldDisplacement(base, displacement)) {
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192 return null;
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193 }
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194 return HotSpotObjectConstantImpl.forObject(readRawObject(base, displacement, false));
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195 }
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196
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197 @Override
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198 public JavaConstant readNarrowOopConstant(Constant base, long displacement, CompressEncoding encoding) {
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199 assert encoding.equals(runtime.getConfig().getOopEncoding()) : "unexpected oop encoding: " + encoding + " != " + runtime.getConfig().getOopEncoding();
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200 return HotSpotObjectConstantImpl.forObject(readRawObject(base, displacement, true), true);
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201 }
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202
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203 @Override
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204 public Constant readKlassPointerConstant(Constant base, long displacement) {
21527
07b088d61d5d added HotSpotJVMCIRuntime* classes, replaced references to HotSpotGraalRuntime in VM with HotSpotJVMCIRuntime (JBS:GRAAL-53)
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diff changeset
205 TargetDescription target = runtime.getHostJVMCIBackend().getCodeCache().getTarget();
07b088d61d5d added HotSpotJVMCIRuntime* classes, replaced references to HotSpotGraalRuntime in VM with HotSpotJVMCIRuntime (JBS:GRAAL-53)
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diff changeset
206 long klass = readRawValue(base, displacement, target.wordSize * 8);
18735
e04e41c3cb6e Handle null in readKlassPointer
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diff changeset
207 if (klass == 0) {
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diff changeset
208 return JavaConstant.NULL_POINTER;
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209 }
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diff changeset
210 HotSpotResolvedObjectType metaKlass = HotSpotResolvedObjectTypeImpl.fromMetaspaceKlass(klass);
21527
07b088d61d5d added HotSpotJVMCIRuntime* classes, replaced references to HotSpotGraalRuntime in VM with HotSpotJVMCIRuntime (JBS:GRAAL-53)
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diff changeset
211 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(target.wordKind, klass, metaKlass, false);
18483
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
212 }
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
213
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diff changeset
214 @Override
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diff changeset
215 public Constant readNarrowKlassPointerConstant(Constant base, long displacement, CompressEncoding encoding) {
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diff changeset
216 int compressed = (int) readRawValue(base, displacement, 32);
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diff changeset
217 long klass = encoding.uncompress(compressed);
18735
e04e41c3cb6e Handle null in readKlassPointer
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parents: 18719
diff changeset
218 if (klass == 0) {
18779
7ea9a39bd7cc return proper kind of NULL
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parents: 18735
diff changeset
219 return HotSpotCompressedNullConstant.COMPRESSED_NULL;
18735
e04e41c3cb6e Handle null in readKlassPointer
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diff changeset
220 }
18483
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
221 HotSpotResolvedObjectType metaKlass = HotSpotResolvedObjectTypeImpl.fromMetaspaceKlass(klass);
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
222 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(Kind.Int, compressed, metaKlass, true);
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
223 }
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
224
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
225 @Override
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
226 public Constant readMethodPointerConstant(Constant base, long displacement) {
21527
07b088d61d5d added HotSpotJVMCIRuntime* classes, replaced references to HotSpotGraalRuntime in VM with HotSpotJVMCIRuntime (JBS:GRAAL-53)
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diff changeset
227 TargetDescription target = runtime.getHostJVMCIBackend().getCodeCache().getTarget();
07b088d61d5d added HotSpotJVMCIRuntime* classes, replaced references to HotSpotGraalRuntime in VM with HotSpotJVMCIRuntime (JBS:GRAAL-53)
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diff changeset
228 long method = readRawValue(base, displacement, target.wordSize * 8);
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diff changeset
229 HotSpotResolvedJavaMethod metaMethod = HotSpotResolvedJavaMethodImpl.fromMetaspace(method);
21527
07b088d61d5d added HotSpotJVMCIRuntime* classes, replaced references to HotSpotGraalRuntime in VM with HotSpotJVMCIRuntime (JBS:GRAAL-53)
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parents: 20176
diff changeset
230 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(target.wordKind, method, metaMethod, false);
15023
652564fe42d5 Use CompressionNode for accessing compressed Klass pointers.
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diff changeset
231 }
12429
5124eeec1a7b split HotSpotRuntime into separate provider implementations
Doug Simon <doug.simon@oracle.com>
parents:
diff changeset
232 }