Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/Signature.java @ 21567:f41409c6ff26
Do not rely on single/double slot information from the Kind of the value in a local variable or expression stack entry. With word type rewriting during parsing, long values can be single slot values when they are rewritten from Object values.
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Thu, 28 May 2015 17:00:59 -0700 |
parents | 48c1ebd24120 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 2012, 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 com.oracle.jvmci.meta; |
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24 |
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25 /** |
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26 * Represents a method signature provided by the runtime. |
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27 * |
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28 * @see <a href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">Method |
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29 * Descriptors</a> |
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30 */ |
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31 public interface Signature { |
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32 |
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33 /** |
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34 * Returns the number of parameters in this signature, adding 1 for a receiver if requested. |
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35 * |
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36 * @param receiver true if 1 is to be added to the result for a receiver |
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37 * @return the number of parameters; + 1 iff {@code receiver == true} |
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38 */ |
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39 int getParameterCount(boolean receiver); |
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40 |
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41 /** |
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42 * Gets the parameter type at the specified position. |
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43 * |
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44 * @param index the index into the parameters, with {@code 0} indicating the first parameter |
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45 * @param accessingClass the context of the type lookup. If non-null, its class loader is used |
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46 * for resolving the type. If {@code null}, then the type returned is either |
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47 * unresolved or a resolved type whose resolution is context free (e.g., a primitive |
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48 * type or a type in a java.* package). |
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49 * @return the {@code index}'th parameter type |
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50 * @throws LinkageError if {@code accessingClass != null} and resolution fails |
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51 * |
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52 */ |
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53 JavaType getParameterType(int index, ResolvedJavaType accessingClass); |
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54 |
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55 /** |
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56 * Gets the parameter kind at the specified position. This is the same as calling |
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57 * {@link #getParameterType}. {@link JavaType#getKind getKind}. |
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58 * |
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59 * @param index the index into the parameters, with {@code 0} indicating the first parameter |
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60 * @return the kind of the parameter at the specified position |
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61 */ |
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62 default Kind getParameterKind(int index) { |
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63 return getParameterType(index, null).getKind(); |
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64 } |
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65 |
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66 /** |
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67 * Gets the return type of this signature. |
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68 * |
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69 * @param accessingClass the context of the type lookup. If non-null, its class loader is used |
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70 * for resolving the type. If {@code null}, then the type returned is either |
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71 * unresolved or a resolved type whose resolution is context free (e.g., a primitive |
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72 * type or a type in a java.* package). |
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73 * @return the return type |
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74 * @throws LinkageError if {@code accessingClass != null} and resolution fails |
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75 */ |
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76 JavaType getReturnType(ResolvedJavaType accessingClass); |
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77 |
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78 /** |
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79 * Gets the return kind of this signature. This is the same as calling {@link #getReturnType}. |
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80 * {@link JavaType#getKind getKind}. |
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81 */ |
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82 default Kind getReturnKind() { |
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83 return getReturnType(null).getKind(); |
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84 } |
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85 |
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86 /** |
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87 * Gets the <a |
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88 * href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">method |
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89 * descriptor</a> corresponding to this signature. For example: |
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90 * |
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91 * <pre> |
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92 * (ILjava/lang/String;D)V |
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93 * </pre> |
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94 * |
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95 * @return the signature as a string |
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96 */ |
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97 default String toMethodDescriptor() { |
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98 StringBuilder sb = new StringBuilder("("); |
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99 for (int i = 0; i < getParameterCount(false); ++i) { |
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100 sb.append(getParameterType(i, null).getName()); |
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101 } |
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102 sb.append(')').append(getReturnType(null).getName()); |
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103 return sb.toString(); |
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104 } |
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105 |
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106 default JavaType[] toParameterTypes(JavaType receiverType) { |
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107 int args = getParameterCount(false); |
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108 JavaType[] result; |
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109 int i = 0; |
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110 if (receiverType != null) { |
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111 result = new JavaType[args + 1]; |
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112 result[0] = receiverType; |
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113 i = 1; |
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114 } else { |
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115 result = new JavaType[args]; |
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116 } |
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117 for (int j = 0; j < args; j++) { |
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118 result[i + j] = getParameterType(j, null); |
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119 } |
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120 return result; |
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121 } |
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Do not rely on single/double slot information from the Kind of the value in a local variable or expression stack entry. With word type rewriting during parsing, long values can be single slot values when they are rewritten from Object values.
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122 |
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123 default Kind[] toParameterKinds(boolean receiver) { |
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124 int args = getParameterCount(false); |
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125 Kind[] result; |
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126 int i = 0; |
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127 if (receiver) { |
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128 result = new Kind[args + 1]; |
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129 result[0] = Kind.Object; |
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130 i = 1; |
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131 } else { |
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132 result = new Kind[args]; |
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133 } |
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134 for (int j = 0; j < args; j++) { |
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135 result[i + j] = getParameterKind(j); |
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136 } |
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137 return result; |
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138 } |
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139 } |