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annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMemoryAccessProviderImpl.java @ 22679:4688478ecb7b

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Make space in frame for native callee to spill outgoing parameters
author Stefan Anzinger <stefan.anzinger@oracle.com>
date Tue, 13 Oct 2015 17:07:59 +0200
parents 1bbd4a7c274b
children 4b58c92e939b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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
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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.UnsafeAccess.UNSAFE;
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26 import jdk.vm.ci.common.JVMCIError;
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27 import jdk.vm.ci.hotspot.HotSpotVMConfig.CompressEncoding;
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28 import jdk.vm.ci.meta.Constant;
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29 import jdk.vm.ci.meta.JavaConstant;
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30 import jdk.vm.ci.meta.JavaKind;
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31 import jdk.vm.ci.meta.MemoryAccessProvider;
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32 import jdk.vm.ci.meta.PrimitiveConstant;
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33
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34 /**
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35 * HotSpot implementation of {@link MemoryAccessProvider}.
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36 */
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37 class HotSpotMemoryAccessProviderImpl implements HotSpotMemoryAccessProvider, HotSpotProxified {
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38
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39 protected final HotSpotJVMCIRuntimeProvider runtime;
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40
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41 public HotSpotMemoryAccessProviderImpl(HotSpotJVMCIRuntimeProvider runtime) {
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42 this.runtime = runtime;
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43 }
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44
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45 private static Object asObject(Constant base) {
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46 if (base instanceof HotSpotObjectConstantImpl) {
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47 return ((HotSpotObjectConstantImpl) base).object();
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48 } else {
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49 return null;
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50 }
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51 }
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52
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53 private boolean isValidObjectFieldDisplacement(Constant base, long displacement) {
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54 if (base instanceof HotSpotMetaspaceConstant) {
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55 MetaspaceWrapperObject metaspaceObject = HotSpotMetaspaceConstantImpl.getMetaspaceObject(base);
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56 if (metaspaceObject instanceof HotSpotResolvedObjectTypeImpl) {
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57 if (displacement == runtime.getConfig().classMirrorOffset) {
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58 // Klass::_java_mirror is valid for all Klass* values
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59 return true;
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60 } else if (displacement == runtime.getConfig().arrayKlassComponentMirrorOffset) {
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61 // ArrayKlass::_component_mirror is only valid for all ArrayKlass* values
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62 return ((HotSpotResolvedObjectTypeImpl) metaspaceObject).mirror().isArray();
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63 }
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64 } else {
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65 throw new JVMCIError("%s", metaspaceObject);
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66 }
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67 }
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68 return false;
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69 }
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70
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71 private static long asRawPointer(Constant base) {
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72 if (base instanceof HotSpotMetaspaceConstantImpl) {
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73 MetaspaceWrapperObject meta = HotSpotMetaspaceConstantImpl.getMetaspaceObject(base);
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74 return meta.getMetaspacePointer();
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75 } else if (base instanceof PrimitiveConstant) {
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76 PrimitiveConstant prim = (PrimitiveConstant) base;
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77 if (prim.getJavaKind().isNumericInteger()) {
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78 return prim.asLong();
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79 }
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80 }
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81 throw new JVMCIError("%s", base);
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82 }
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83
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84 private static long readRawValue(Constant baseConstant, long displacement, int bits) {
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85 Object base = asObject(baseConstant);
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86 if (base != null) {
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87 switch (bits) {
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88 case 8:
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89 return UNSAFE.getByte(base, displacement);
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90 case 16:
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91 return UNSAFE.getShort(base, displacement);
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92 case 32:
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93 return UNSAFE.getInt(base, displacement);
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94 case 64:
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95 return UNSAFE.getLong(base, displacement);
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96 default:
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97 throw new JVMCIError("%d", bits);
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98 }
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99 } else {
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100 long pointer = asRawPointer(baseConstant);
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101 switch (bits) {
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102 case 8:
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103 return UNSAFE.getByte(pointer + displacement);
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104 case 16:
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105 return UNSAFE.getShort(pointer + displacement);
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106 case 32:
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107 return UNSAFE.getInt(pointer + displacement);
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108 case 64:
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109 return UNSAFE.getLong(pointer + displacement);
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110 default:
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111 throw new JVMCIError("%d", bits);
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112 }
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113 }
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114 }
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115
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116 private boolean verifyReadRawObject(Object expected, Constant base, long displacement, boolean compressed) {
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117 if (compressed == runtime.getConfig().useCompressedOops) {
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118 Object obj = asObject(base);
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119 if (obj != null) {
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120 assert expected == UNSAFE.getObject(obj, displacement) : "readUnsafeOop doesn't agree with unsafe.getObject";
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121 }
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122 }
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123 if (base instanceof HotSpotMetaspaceConstant) {
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124 MetaspaceWrapperObject metaspaceObject = HotSpotMetaspaceConstantImpl.getMetaspaceObject(base);
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125 if (metaspaceObject instanceof HotSpotResolvedObjectTypeImpl) {
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126 if (displacement == runtime.getConfig().classMirrorOffset) {
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127 assert expected == ((HotSpotResolvedObjectTypeImpl) metaspaceObject).mirror();
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128 } else if (displacement == runtime.getConfig().arrayKlassComponentMirrorOffset) {
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129 assert expected == ((HotSpotResolvedObjectTypeImpl) metaspaceObject).mirror().getComponentType();
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130 }
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131 }
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132 }
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133 return true;
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134 }
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135
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136 private Object readRawObject(Constant baseConstant, long initialDisplacement, boolean compressed) {
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137 long displacement = initialDisplacement;
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138
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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 Object ret;
18719
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140 Object base = asObject(baseConstant);
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141 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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parents: 19772
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142 assert !compressed;
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143 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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parents: 19772
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144 ret = runtime.getCompilerToVM().readUncompressedOop(displacement);
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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parents: 19772
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145 } else {
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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parents: 19772
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146 assert runtime.getConfig().useCompressedOops == compressed;
22542
15579668ec3a renamed constant field to UNSAFE
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147 ret = UNSAFE.getObject(base, displacement);
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148 }
18719
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149 assert verifyReadRawObject(ret, baseConstant, initialDisplacement, compressed);
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150 return ret;
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151 }
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152
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153 @Override
22536
dc1aeef79e7e Refactoring: Rename Kind to JavaKind.
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154 public JavaConstant readUnsafeConstant(JavaKind kind, JavaConstant baseConstant, long displacement) {
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155 if (kind == JavaKind.Object) {
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156 Object o = readRawObject(baseConstant, displacement, runtime.getConfig().useCompressedOops);
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157 return HotSpotObjectConstantImpl.forObject(o);
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158 } else {
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b8a622c3e99f Move raw memory access operations to a separate interface.
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diff changeset
159 return readPrimitiveConstant(kind, baseConstant, displacement, kind.getByteCount() * 8);
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160 }
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161 }
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162
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163 @Override
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164 public JavaConstant readPrimitiveConstant(JavaKind kind, Constant baseConstant, long initialDisplacement, int bits) {
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165 try {
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166 long rawValue = readRawValue(baseConstant, initialDisplacement, bits);
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167 switch (kind) {
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168 case Boolean:
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169 return JavaConstant.forBoolean(rawValue != 0);
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170 case Byte:
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171 return JavaConstant.forByte((byte) rawValue);
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172 case Char:
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173 return JavaConstant.forChar((char) rawValue);
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174 case Short:
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175 return JavaConstant.forShort((short) rawValue);
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176 case Int:
18187
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177 return JavaConstant.forInt((int) rawValue);
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178 case Long:
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179 return JavaConstant.forLong(rawValue);
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180 case Float:
18187
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diff changeset
181 return JavaConstant.forFloat(Float.intBitsToFloat((int) rawValue));
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182 case Double:
18187
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183 return JavaConstant.forDouble(Double.longBitsToDouble(rawValue));
15023
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diff changeset
184 default:
21552
9579a3c62a9e use skeleton findbugs jar containing only SuppresFBWarnings to avoid external dependency for JVMCI classes (JBS:GRAAL-53)
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parents: 20176
diff changeset
185 throw new JVMCIError("Unsupported kind: %s", kind);
15023
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186 }
18359
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187 } catch (NullPointerException e) {
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188 return null;
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diff changeset
189 }
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diff changeset
190 }
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diff changeset
191
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d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
192 @Override
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diff changeset
193 public JavaConstant readObjectConstant(Constant base, long displacement) {
19772
94d87f6324a3 ensure an offset into a HotSpot metaspace object is valid before reading it
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diff changeset
194 if (!isValidObjectFieldDisplacement(base, displacement)) {
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diff changeset
195 return null;
94d87f6324a3 ensure an offset into a HotSpot metaspace object is valid before reading it
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diff changeset
196 }
18483
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
197 return HotSpotObjectConstantImpl.forObject(readRawObject(base, displacement, false));
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198 }
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diff changeset
199
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diff changeset
200 @Override
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
201 public JavaConstant readNarrowOopConstant(Constant base, long displacement, CompressEncoding encoding) {
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diff changeset
202 assert encoding.equals(runtime.getConfig().getOopEncoding()) : "unexpected oop encoding: " + encoding + " != " + runtime.getConfig().getOopEncoding();
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diff changeset
203 return HotSpotObjectConstantImpl.forObject(readRawObject(base, displacement, true), true);
18359
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diff changeset
204 }
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diff changeset
205
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
206 private HotSpotResolvedObjectTypeImpl readKlass(Constant base, long displacement, boolean compressed) {
76af33d4d504 Make jvmci redefinition safe
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parents: 22054
diff changeset
207 assert (base instanceof HotSpotMetaspaceConstantImpl) || (base instanceof HotSpotObjectConstantImpl) : base.getClass();
76af33d4d504 Make jvmci redefinition safe
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parents: 22054
diff changeset
208 Object baseObject = (base instanceof HotSpotMetaspaceConstantImpl) ? ((HotSpotMetaspaceConstantImpl) base).asResolvedJavaType() : ((HotSpotObjectConstantImpl) base).object();
76af33d4d504 Make jvmci redefinition safe
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parents: 22054
diff changeset
209 return runtime.getCompilerToVM().getResolvedJavaType(baseObject, displacement, compressed);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
210 }
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
211
18483
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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diff changeset
212 @Override
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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parents: 18482
diff changeset
213 public Constant readKlassPointerConstant(Constant base, long displacement) {
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
214 HotSpotResolvedObjectTypeImpl klass = readKlass(base, displacement, false);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
215 if (klass == null) {
18735
e04e41c3cb6e Handle null in readKlassPointer
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 18719
diff changeset
216 return JavaConstant.NULL_POINTER;
e04e41c3cb6e Handle null in readKlassPointer
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 18719
diff changeset
217 }
22590
3f6488b29c1a Remove rawValue from HotSpotMetaspaceConstantImpl, patch raw pointer at code installation time.
Roland Schatz <roland.schatz@oracle.com>
parents: 22556
diff changeset
218 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(klass, false);
18483
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
Roland Schatz <roland.schatz@oracle.com>
parents: 18482
diff changeset
219 }
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
Roland Schatz <roland.schatz@oracle.com>
parents: 18482
diff changeset
220
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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parents: 18482
diff changeset
221 @Override
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
Roland Schatz <roland.schatz@oracle.com>
parents: 18482
diff changeset
222 public Constant readNarrowKlassPointerConstant(Constant base, long displacement, CompressEncoding encoding) {
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
223 HotSpotResolvedObjectTypeImpl klass = readKlass(base, displacement, true);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
224 if (klass == null) {
18779
7ea9a39bd7cc return proper kind of NULL
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 18735
diff changeset
225 return HotSpotCompressedNullConstant.COMPRESSED_NULL;
18735
e04e41c3cb6e Handle null in readKlassPointer
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 18719
diff changeset
226 }
22590
3f6488b29c1a Remove rawValue from HotSpotMetaspaceConstantImpl, patch raw pointer at code installation time.
Roland Schatz <roland.schatz@oracle.com>
parents: 22556
diff changeset
227 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(klass, true);
18483
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
Roland Schatz <roland.schatz@oracle.com>
parents: 18482
diff changeset
228 }
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
Roland Schatz <roland.schatz@oracle.com>
parents: 18482
diff changeset
229
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
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parents: 18482
diff changeset
230 @Override
d7cc487d1325 Move HotSpot specific functionality to new subinterface of ConstantReflectionProvider.
Roland Schatz <roland.schatz@oracle.com>
parents: 18482
diff changeset
231 public Constant readMethodPointerConstant(Constant base, long displacement) {
22454
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
232 assert (base instanceof HotSpotObjectConstantImpl);
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
233 Object baseObject = ((HotSpotObjectConstantImpl) base).object();
76af33d4d504 Make jvmci redefinition safe
Tom Rodriguez <tom.rodriguez@oracle.com>
parents: 22054
diff changeset
234 HotSpotResolvedJavaMethodImpl method = runtime.getCompilerToVM().getResolvedJavaMethod(baseObject, displacement);
22590
3f6488b29c1a Remove rawValue from HotSpotMetaspaceConstantImpl, patch raw pointer at code installation time.
Roland Schatz <roland.schatz@oracle.com>
parents: 22556
diff changeset
235 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(method, false);
15023
652564fe42d5 Use CompressionNode for accessing compressed Klass pointers.
Roland Schatz <roland.schatz@oracle.com>
parents: 15018
diff changeset
236 }
12429
5124eeec1a7b split HotSpotRuntime into separate provider implementations
Doug Simon <doug.simon@oracle.com>
parents:
diff changeset
237 }