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1 /* |
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2 * Copyright 2003-2006 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/_verificationType.cpp.incl" |
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27 |
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28 VerificationType VerificationType::from_tag(u1 tag) { |
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29 switch (tag) { |
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30 case ITEM_Top: return bogus_type(); |
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31 case ITEM_Integer: return integer_type(); |
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32 case ITEM_Float: return float_type(); |
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33 case ITEM_Double: return double_type(); |
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34 case ITEM_Long: return long_type(); |
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35 case ITEM_Null: return null_type(); |
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36 default: |
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37 ShouldNotReachHere(); |
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38 return bogus_type(); |
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39 } |
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40 } |
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41 |
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42 bool VerificationType::is_reference_assignable_from( |
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43 const VerificationType& from, instanceKlassHandle context, TRAPS) const { |
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44 if (from.is_null()) { |
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45 // null is assignable to any reference |
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46 return true; |
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47 } else if (is_null()) { |
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48 return false; |
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49 } else if (name() == from.name()) { |
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50 return true; |
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51 } else if (is_object()) { |
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52 // We need check the class hierarchy to check assignability |
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53 if (name() == vmSymbols::java_lang_Object()) { |
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54 // any object or array is assignable to java.lang.Object |
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55 return true; |
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56 } |
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57 klassOop this_class = SystemDictionary::resolve_or_fail( |
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58 name_handle(), Handle(THREAD, context->class_loader()), |
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59 Handle(THREAD, context->protection_domain()), true, CHECK_false); |
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60 if (this_class->klass_part()->is_interface()) { |
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61 // We treat interfaces as java.lang.Object, including |
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62 // java.lang.Cloneable and java.io.Serializable |
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63 return true; |
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64 } else if (from.is_object()) { |
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65 klassOop from_class = SystemDictionary::resolve_or_fail( |
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66 from.name_handle(), Handle(THREAD, context->class_loader()), |
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67 Handle(THREAD, context->protection_domain()), true, CHECK_false); |
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68 return instanceKlass::cast(from_class)->is_subclass_of(this_class); |
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69 } |
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70 } else if (is_array() && from.is_array()) { |
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71 VerificationType comp_this = get_component(CHECK_false); |
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72 VerificationType comp_from = from.get_component(CHECK_false); |
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73 return comp_this.is_assignable_from(comp_from, context, CHECK_false); |
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74 } |
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75 return false; |
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76 } |
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77 |
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78 VerificationType VerificationType::get_component(TRAPS) const { |
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79 assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array"); |
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80 symbolOop component; |
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81 switch (name()->byte_at(1)) { |
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82 case 'Z': return VerificationType(Boolean); |
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83 case 'B': return VerificationType(Byte); |
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84 case 'C': return VerificationType(Char); |
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85 case 'S': return VerificationType(Short); |
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86 case 'I': return VerificationType(Integer); |
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87 case 'J': return VerificationType(Long); |
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88 case 'F': return VerificationType(Float); |
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89 case 'D': return VerificationType(Double); |
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90 case '[': |
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91 component = SymbolTable::lookup( |
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92 name(), 1, name()->utf8_length(), |
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93 CHECK_(VerificationType::bogus_type())); |
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94 return VerificationType::reference_type(component); |
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95 case 'L': |
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96 component = SymbolTable::lookup( |
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97 name(), 2, name()->utf8_length() - 1, |
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98 CHECK_(VerificationType::bogus_type())); |
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99 return VerificationType::reference_type(component); |
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100 default: |
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101 ShouldNotReachHere(); |
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102 return VerificationType::bogus_type(); |
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103 } |
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104 } |
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105 |
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106 #ifndef PRODUCT |
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107 |
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108 void VerificationType::print_on(outputStream* st) const { |
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109 switch (_u._data) { |
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110 case Bogus: st->print(" bogus "); break; |
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111 case Category1: st->print(" category1 "); break; |
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112 case Category2: st->print(" category2 "); break; |
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113 case Category2_2nd: st->print(" category2_2nd "); break; |
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114 case Boolean: st->print(" boolean "); break; |
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115 case Byte: st->print(" byte "); break; |
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116 case Short: st->print(" short "); break; |
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117 case Char: st->print(" char "); break; |
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118 case Integer: st->print(" integer "); break; |
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119 case Float: st->print(" float "); break; |
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120 case Long: st->print(" long "); break; |
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121 case Double: st->print(" double "); break; |
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122 case Long_2nd: st->print(" long_2nd "); break; |
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123 case Double_2nd: st->print(" double_2nd "); break; |
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124 case Null: st->print(" null "); break; |
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125 default: |
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126 if (is_uninitialized_this()) { |
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127 st->print(" uninitializedThis "); |
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128 } else if (is_uninitialized()) { |
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129 st->print(" uninitialized %d ", bci()); |
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130 } else { |
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131 st->print(" class %s ", name()->as_klass_external_name()); |
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132 } |
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133 } |
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134 } |
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135 |
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136 #endif |