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annotate src/share/vm/ci/ciSignature.cpp @ 17467:55fb97c4c58d hs25-b65

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8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013 Summary: Copyright year updated for files modified during 2013 Reviewed-by: twisti, iveresov
author mikael
date Tue, 24 Dec 2013 11:48:39 -0800
parents f6b0eb4e44cf
children 78bbf4d43a14
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1 /*
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2 * Copyright (c) 1999, 2011, 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 */
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24
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25 #include "precompiled.hpp"
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26 #include "ci/ciMethodType.hpp"
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27 #include "ci/ciSignature.hpp"
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28 #include "ci/ciUtilities.hpp"
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29 #include "memory/allocation.inline.hpp"
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30 #include "oops/oop.inline.hpp"
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31 #include "runtime/signature.hpp"
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32
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33 // ciSignature
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34 //
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35 // This class represents the signature of a method.
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36
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37 // ------------------------------------------------------------------
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38 // ciSignature::ciSignature
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39 ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) {
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40 ASSERT_IN_VM;
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41 EXCEPTION_CONTEXT;
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42 _accessing_klass = accessing_klass;
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43 _symbol = symbol;
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44
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45 ciEnv* env = CURRENT_ENV;
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46 Arena* arena = env->arena();
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47 _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
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48
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49 int size = 0;
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50 int count = 0;
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51 ResourceMark rm(THREAD);
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52 Symbol* sh = symbol->get_symbol();
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53 SignatureStream ss(sh);
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54 for (; ; ss.next()) {
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55 // Process one element of the signature
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56 ciType* type;
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57 if (!ss.is_object()) {
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58 type = ciType::make(ss.type());
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59 } else {
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60 Symbol* name = ss.as_symbol(THREAD);
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61 if (HAS_PENDING_EXCEPTION) {
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62 type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
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63 : (ciType*)ciEnv::unloaded_ciinstance_klass();
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64 env->record_out_of_memory_failure();
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65 CLEAR_PENDING_EXCEPTION;
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66 } else {
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67 ciSymbol* klass_name = env->get_symbol(name);
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68 type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
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69 }
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70 }
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71 _types->append(type);
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72 if (ss.at_return_type()) {
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73 // Done processing the return type; do not add it into the count.
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74 break;
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75 }
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76 size += type->size();
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77 count++;
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78 }
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79 _size = size;
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80 _count = count;
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81 }
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82
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83 // ------------------------------------------------------------------
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84 // ciSignature::ciSignature
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85 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) :
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86 _symbol(symbol),
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87 _accessing_klass(accessing_klass),
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88 _size( method_type->ptype_slot_count()),
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89 _count(method_type->ptype_count())
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90 {
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91 ASSERT_IN_VM;
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92 EXCEPTION_CONTEXT;
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93 Arena* arena = CURRENT_ENV->arena();
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94 _types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL);
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95 for (int i = 0; i < _count; i++) {
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96 _types->append(method_type->ptype_at(i));
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97 }
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98 _types->append(method_type->rtype());
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99 }
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100
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101 // ------------------------------------------------------------------
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102 // ciSignature::return_type
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103 //
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104 // What is the return type of this signature?
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105 ciType* ciSignature::return_type() const {
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106 return _types->at(_count);
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107 }
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108
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109 // ------------------------------------------------------------------
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110 // ciSignature::type_at
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111 //
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112 // What is the type of the index'th element of this
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113 // signature?
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114 ciType* ciSignature::type_at(int index) const {
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115 assert(index < _count, "out of bounds");
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116 // The first _klasses element holds the return klass.
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117 return _types->at(index);
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118 }
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119
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120 // ------------------------------------------------------------------
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121 // ciSignature::equals
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122 //
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123 // Compare this signature to another one. Signatures with different
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124 // accessing classes but with signature-types resolved to the same
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125 // types are defined to be equal.
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126 bool ciSignature::equals(ciSignature* that) {
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127 // Compare signature
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128 if (!this->as_symbol()->equals(that->as_symbol())) return false;
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129 // Compare all types of the arguments
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130 for (int i = 0; i < _count; i++) {
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131 if (this->type_at(i) != that->type_at(i)) return false;
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132 }
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133 // Compare the return type
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134 if (this->return_type() != that->return_type()) return false;
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135 return true;
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136 }
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137
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138 // ------------------------------------------------------------------
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139 // ciSignature::print_signature
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140 void ciSignature::print_signature() {
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141 _symbol->print_symbol();
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142 }
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143
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144 // ------------------------------------------------------------------
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145 // ciSignature::print
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146 void ciSignature::print() {
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147 tty->print("<ciSignature symbol=");
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148 print_signature();
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149 tty->print(" accessing_klass=");
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150 _accessing_klass->print();
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151 tty->print(" address=0x%x>", (address)this);
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152 }