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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/HotSpotSignature.java @ 1433:efba53f86c4f

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various fixes and enhancements * correct refmap->oopmap conversion (register numbering, stack slot numbering) * fixes for inlining (correct scoping in exception handler lookup, NPE in scope conversion) * support for "jump to runtime stub" (patching code needs to be aware of jmp instruction) * provide more information about methods (to allow inlining: has_balanced_monitors, etc.) * fixes to signature type lookup * isSubTypeOf: correct handling of array classes * RiType: componentType/arrayOf * prologue: inline cache check, icmiss stub * klass state check (resolved but not initialized) in newinstance * card table write barriers * c1x classes are optional (to allow running c1 without them) * correct for stored frame pointer in calling conventions (methods with arguments on stack) * getType(Class<?>) for some basic types, used for optimizations and folding * RiMethod/RiType: throw exception instead of silent failure on unsupported operations * RiType: resolved/unresolved array type support * refactoring: new on-demand template generation mechanism * optimizations: template specialization for no_null_check, given length, etc.
author Lukas Stadler <lukas.stadler@oracle.com>
date Thu, 16 Sep 2010 19:42:20 -0700
parents 760213a60e8b
children 9e5e83ca2259
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1 /*
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2 * Copyright (c) 2009-2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is
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5 * described in this document. In particular, and without limitation, these intellectual property rights may include one
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6 * or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent
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7 * applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc. standard
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10 * license agreement and applicable provisions of the FAR and its supplements.
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11 *
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12 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or registered
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13 * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks are used under license and
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14 * are trademarks or registered trademarks of SPARC International, Inc. in the U.S. and other countries.
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15 *
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16 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open Company, Ltd.
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17 */
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18 package com.sun.hotspot.c1x;
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19
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20 import java.util.*;
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21
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22 import com.sun.cri.ci.*;
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23 import com.sun.cri.ri.*;
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24
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25 /**
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26 * Represents a method signature.
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27 *
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28 * @author Thomas Wuerthinger, Lukas Stadler
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29 */
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30 public class HotSpotSignature implements RiSignature, CompilerObject {
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31
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32 private final List<String> arguments = new ArrayList<String>();
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33 private final String returnType;
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34 private final String originalString;
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35 private RiType[] argumentTypes;
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36 private RiType returnTypeCache;
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37
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38 public HotSpotSignature(String signature) {
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39 assert signature.length() > 0;
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40 this.originalString = signature;
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41
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42 if (signature.charAt(0) == '(') {
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43 int cur = 1;
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44 while (cur < signature.length() && signature.charAt(cur) != ')') {
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45 int nextCur = parseSignature(signature, cur);
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46 arguments.add(signature.substring(cur, nextCur));
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47 cur = nextCur;
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48 }
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49
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50 cur++;
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51 int nextCur = parseSignature(signature, cur);
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52 returnType = signature.substring(cur, nextCur);
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53 assert nextCur == signature.length();
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54 } else {
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55 returnType = null;
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56 }
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57 }
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58
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59 private int parseSignature(String signature, int cur) {
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60 char first;
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61 do {
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62 first = signature.charAt(cur++);
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63 } while (first == '[');
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64
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65 switch (first) {
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66 case 'L':
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67 while (signature.charAt(cur) != ';')
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68 cur++;
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69 cur++;
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70 break;
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71 case 'V':
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72 case 'I':
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73 case 'B':
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74 case 'C':
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75 case 'D':
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76 case 'F':
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77 case 'J':
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78 case 'S':
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79 case 'Z':
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80 break;
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81 default:
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82 assert false;
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83 }
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84 return cur;
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85 }
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86
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87 @Override
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88 public int argumentCount(boolean withReceiver) {
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89 return arguments.size() + (withReceiver ? 1 : 0);
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90 }
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91
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92 @Override
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93 public CiKind argumentKindAt(int index) {
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94 return CiKind.fromTypeString(arguments.get(index));
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95 }
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96
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97 @Override
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98 public int argumentSlots(boolean withReceiver) {
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99
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100 int argSlots = 0;
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101 for (int i = 0; i < argumentCount(false); i++) {
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102 argSlots += argumentKindAt(i).sizeInSlots();
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103 }
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104
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105 return argSlots + (withReceiver ? 1 : 0);
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106 }
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107
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108 @Override
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109 public RiType argumentTypeAt(int index, RiType accessingClass) {
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110 if (argumentTypes == null) {
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111 argumentTypes = new RiType[arguments.size()];
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112 }
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113 RiType type = argumentTypes[index];
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114 if (type == null) {
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115 long accessor = 0;
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116 if (accessingClass instanceof HotSpotTypeResolved) {
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117 accessor = (Long) ((HotSpotTypeResolved) accessingClass).getVmId();
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118 }
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119 type = Compiler.getVMEntries().RiSignature_lookupType(arguments.get(index), accessor);
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120 argumentTypes[index] = type;
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121 }
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122 return type;
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123 }
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124
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125 @Override
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126 public String asString() {
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127 return originalString;
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128 }
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129
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130 @Override
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131 public CiKind returnKind() {
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132 return CiKind.fromTypeString(returnType);
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133 }
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134
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135 @Override
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136 public RiType returnType(RiType accessingClass) {
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137 if (returnTypeCache == null) {
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138 long accessor = 0;
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139 if (accessingClass instanceof HotSpotTypeResolved) {
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140 accessor = (Long) ((HotSpotTypeResolved) accessingClass).getVmId();
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141 }
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142 returnTypeCache = Compiler.getVMEntries().RiSignature_lookupType(returnType, accessor);
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143 }
1433
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144 return returnTypeCache;
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145 }
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146
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147 @Override
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148 public String toString() {
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149 return "HotSpotSignature<" + originalString + ">";
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150 }
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151
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152 }