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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 jdk.vm.ci.code.BytecodeFrame; |
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26 import jdk.vm.ci.code.CompiledCode; |
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27 import jdk.vm.ci.code.StackSlot; |
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28 import jdk.vm.ci.code.site.DataPatch; |
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29 import jdk.vm.ci.code.site.Infopoint; |
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30 import jdk.vm.ci.code.site.Site; |
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31 import jdk.vm.ci.meta.Assumptions.Assumption; |
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32 import jdk.vm.ci.meta.ResolvedJavaMethod; |
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33 |
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34 /** |
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35 * A {@link CompiledCode} with additional HotSpot-specific information required for installing the |
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36 * code in HotSpot's code cache. |
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37 */ |
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38 public class HotSpotCompiledCode implements CompiledCode { |
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39 |
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40 /** |
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41 * The name of this compilation unit. |
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42 */ |
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43 protected final String name; |
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44 |
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45 /** |
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46 * The buffer containing the emitted machine code. |
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47 */ |
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48 protected final byte[] targetCode; |
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49 |
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50 /** |
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51 * The leading number of bytes in {@link #targetCode} containing the emitted machine code. |
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52 */ |
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53 protected final int targetCodeSize; |
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54 |
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55 /** |
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56 * A list of code annotations describing special sites in {@link #targetCode}. |
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57 */ |
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58 protected final Site[] sites; |
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59 |
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60 /** |
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61 * A list of {@link Assumption} this code relies on. |
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62 */ |
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63 protected final Assumption[] assumptions; |
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64 |
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65 /** |
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66 * The list of the methods whose bytecodes were used as input to the compilation. If |
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67 * {@code null}, then the compilation did not record method dependencies. Otherwise, the first |
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68 * element of this array is the root method of the compilation. |
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69 */ |
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70 protected final ResolvedJavaMethod[] methods; |
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71 |
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72 /** |
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73 * A list of comments that will be included in code dumps. |
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74 */ |
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75 protected final Comment[] comments; |
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76 |
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77 /** |
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78 * The data section containing serialized constants for the emitted machine code. |
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79 */ |
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80 protected final byte[] dataSection; |
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81 |
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82 /** |
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83 * The minimum alignment of the data section. |
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84 */ |
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85 protected final int dataSectionAlignment; |
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86 |
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87 /** |
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88 * A list of relocations in the {@link #dataSection}. |
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89 */ |
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90 protected final DataPatch[] dataSectionPatches; |
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91 |
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92 /** |
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93 * A flag determining whether this code is immutable and position independent. |
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94 */ |
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95 protected final boolean isImmutablePIC; |
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96 |
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97 /** |
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98 * The total size of the stack frame of this compiled method. |
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99 */ |
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100 protected final int totalFrameSize; |
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101 |
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102 /** |
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103 * The deopt rescue slot. Must be non-null if there is a safepoint in the method. |
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104 */ |
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105 protected final StackSlot deoptRescueSlot; |
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106 |
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107 public static class Comment { |
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108 |
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109 public final String text; |
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110 public final int pcOffset; |
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111 |
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112 public Comment(int pcOffset, String text) { |
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113 this.text = text; |
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114 this.pcOffset = pcOffset; |
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115 } |
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116 } |
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117 |
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118 @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `sites`, `targetCode`, `comments`, `methods`, `dataSection`, `dataSectionPatches` and `assumptions`") |
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119 public HotSpotCompiledCode(String name, byte[] targetCode, int targetCodeSize, Site[] sites, Assumption[] assumptions, ResolvedJavaMethod[] methods, Comment[] comments, byte[] dataSection, |
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120 int dataSectionAlignment, DataPatch[] dataSectionPatches, boolean isImmutablePIC, int totalFrameSize, StackSlot deoptRescueSlot) { |
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121 this.name = name; |
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122 this.targetCode = targetCode; |
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123 this.targetCodeSize = targetCodeSize; |
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124 this.sites = sites; |
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125 this.assumptions = assumptions; |
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126 this.methods = methods; |
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127 |
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128 this.comments = comments; |
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129 this.dataSection = dataSection; |
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130 this.dataSectionAlignment = dataSectionAlignment; |
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131 this.dataSectionPatches = dataSectionPatches; |
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132 this.isImmutablePIC = isImmutablePIC; |
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133 this.totalFrameSize = totalFrameSize; |
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134 this.deoptRescueSlot = deoptRescueSlot; |
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135 |
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136 assert validateFrames(); |
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137 } |
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138 |
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139 public String getName() { |
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140 return name; |
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141 } |
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142 |
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143 @Override |
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144 public String toString() { |
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145 return name; |
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146 } |
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147 |
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148 /** |
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149 * Ensure that all the frames passed into the VM are properly formatted with an empty or illegal |
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150 * slot following double word slots. |
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151 */ |
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152 private boolean validateFrames() { |
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153 for (Site site : sites) { |
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154 if (site instanceof Infopoint) { |
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155 Infopoint info = (Infopoint) site; |
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156 if (info.debugInfo != null) { |
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157 BytecodeFrame frame = info.debugInfo.frame(); |
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158 assert frame == null || frame.validateFormat(); |
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159 } |
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160 } |
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161 } |
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162 return true; |
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163 } |
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164 } |