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1 /*
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2 * Copyright 2000-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_ciType.cpp.incl"
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27
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28 ciType* ciType::_basic_types[T_CONFLICT+1];
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29
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30 // ciType
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31 //
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32 // This class represents either a class (T_OBJECT), array (T_ARRAY),
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33 // or one of the primitive types such as T_INT.
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34
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35 // ------------------------------------------------------------------
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36 // ciType::ciType
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37 //
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38 ciType::ciType(BasicType basic_type) : ciObject() {
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39 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check");
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40 assert(basic_type != T_OBJECT && basic_type != T_ARRAY, "not a reference type");
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41 _basic_type = basic_type;
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42 }
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43
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44 ciType::ciType(KlassHandle k) : ciObject(k) {
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45 _basic_type = Klass::cast(k())->oop_is_array() ? T_ARRAY : T_OBJECT;
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46 }
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47
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48 ciType::ciType(ciKlass* klass) : ciObject(klass) {
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49 _basic_type = klass->is_array_klass_klass() ? T_ARRAY : T_OBJECT;
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50 }
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51
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52
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53 // ------------------------------------------------------------------
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54 // ciType::is_subtype_of
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55 //
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56 bool ciType::is_subtype_of(ciType* type) {
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57 if (this == type) return true;
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58 if (is_klass() && type->is_klass())
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59 return this->as_klass()->is_subtype_of(type->as_klass());
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60 return false;
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61 }
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62
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63 // ------------------------------------------------------------------
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64 // ciType::print_impl
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65 //
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66 // Implementation of the print method.
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67 void ciType::print_impl(outputStream* st) {
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68 st->print(" type=");
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69 print_name_on(st);
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70 }
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71
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72 // ------------------------------------------------------------------
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73 // ciType::print_name
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74 //
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75 // Print the name of this type
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76 void ciType::print_name_on(outputStream* st) {
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77 st->print(type2name(basic_type()));
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78 }
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79
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80
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81
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82 // ------------------------------------------------------------------
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83 // ciType::java_mirror
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84 //
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85 ciInstance* ciType::java_mirror() {
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86 VM_ENTRY_MARK;
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87 return CURRENT_THREAD_ENV->get_object(Universe::java_mirror(basic_type()))->as_instance();
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88 }
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89
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90 // ------------------------------------------------------------------
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91 // ciType::box_klass
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92 //
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93 ciKlass* ciType::box_klass() {
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94 if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing"
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95
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96 // Void is "boxed" with a null.
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97 if (basic_type() == T_VOID) return NULL;
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98
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99 VM_ENTRY_MARK;
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100 return CURRENT_THREAD_ENV->get_object(SystemDictionary::box_klass(basic_type()))->as_instance_klass();
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101 }
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102
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103
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104 // ------------------------------------------------------------------
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105 // ciType::make
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106 //
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107 // Produce the ciType for a given primitive BasicType.
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108 // As a bonus, produce the right reference type for T_OBJECT.
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109 // Does not work on T_ARRAY.
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110 ciType* ciType::make(BasicType t) {
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111 // short, etc.
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112 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address.
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113 assert((uint)t < T_CONFLICT+1, "range check");
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114 if (t == T_OBJECT) return ciEnv::_Object; // java/lang/Object
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115 assert(_basic_types[t] != NULL, "domain check");
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116 return _basic_types[t];
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117 }
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118
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119 // ciReturnAddress
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120 //
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121 // This class represents the type of a specific return address in the
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122 // bytecodes.
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123
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124 // ------------------------------------------------------------------
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125 // ciReturnAddress::ciReturnAddress
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126 //
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127 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) {
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128 assert(0 <= bci, "bci cannot be negative");
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129 _bci = bci;
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130 }
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131
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132 // ------------------------------------------------------------------
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133 // ciReturnAddress::print_impl
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134 //
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135 // Implementation of the print method.
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136 void ciReturnAddress::print_impl(outputStream* st) {
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137 st->print(" bci=%d", _bci);
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138 }
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139
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140 // ------------------------------------------------------------------
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141 // ciReturnAddress::make
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142 ciReturnAddress* ciReturnAddress::make(int bci) {
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143 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);)
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144 }
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