Sat, 01 Dec 2007 00:00:00 +0000
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duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_ciKlass.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | // ciKlass |
duke@435 | 29 | // |
duke@435 | 30 | // This class represents a klassOop in the HotSpot virtual |
duke@435 | 31 | // machine. |
duke@435 | 32 | |
duke@435 | 33 | // ------------------------------------------------------------------ |
duke@435 | 34 | // ciKlass::ciKlass |
duke@435 | 35 | ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) { |
duke@435 | 36 | assert(get_oop()->is_klass(), "wrong type"); |
duke@435 | 37 | Klass* k = get_Klass(); |
duke@435 | 38 | _layout_helper = k->layout_helper(); |
duke@435 | 39 | symbolOop klass_name = k->name(); |
duke@435 | 40 | assert(klass_name != NULL, "wrong ciKlass constructor"); |
duke@435 | 41 | _name = CURRENT_ENV->get_object(klass_name)->as_symbol(); |
duke@435 | 42 | } |
duke@435 | 43 | |
duke@435 | 44 | // ------------------------------------------------------------------ |
duke@435 | 45 | // ciKlass::ciKlass |
duke@435 | 46 | // |
duke@435 | 47 | // Nameless klass variant. |
duke@435 | 48 | ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) { |
duke@435 | 49 | assert(get_oop()->is_klass(), "wrong type"); |
duke@435 | 50 | _name = name; |
duke@435 | 51 | _layout_helper = Klass::_lh_neutral_value; |
duke@435 | 52 | } |
duke@435 | 53 | |
duke@435 | 54 | // ------------------------------------------------------------------ |
duke@435 | 55 | // ciKlass::ciKlass |
duke@435 | 56 | // |
duke@435 | 57 | // Unloaded klass variant. |
duke@435 | 58 | ciKlass::ciKlass(ciSymbol* name, ciKlass* klass) : ciType(klass) { |
duke@435 | 59 | _name = name; |
duke@435 | 60 | _layout_helper = Klass::_lh_neutral_value; |
duke@435 | 61 | } |
duke@435 | 62 | |
duke@435 | 63 | // ------------------------------------------------------------------ |
duke@435 | 64 | // ciKlass::is_subtype_of |
duke@435 | 65 | bool ciKlass::is_subtype_of(ciKlass* that) { |
duke@435 | 66 | assert(is_loaded() && that->is_loaded(), "must be loaded"); |
duke@435 | 67 | assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); |
duke@435 | 68 | // Check to see if the klasses are identical. |
duke@435 | 69 | if (this == that) { |
duke@435 | 70 | return true; |
duke@435 | 71 | } |
duke@435 | 72 | |
duke@435 | 73 | VM_ENTRY_MARK; |
duke@435 | 74 | Klass* this_klass = get_Klass(); |
duke@435 | 75 | klassOop that_klass = that->get_klassOop(); |
duke@435 | 76 | bool result = this_klass->is_subtype_of(that_klass); |
duke@435 | 77 | |
duke@435 | 78 | return result; |
duke@435 | 79 | } |
duke@435 | 80 | |
duke@435 | 81 | // ------------------------------------------------------------------ |
duke@435 | 82 | // ciKlass::is_subclass_of |
duke@435 | 83 | bool ciKlass::is_subclass_of(ciKlass* that) { |
duke@435 | 84 | assert(is_loaded() && that->is_loaded(), "must be loaded"); |
duke@435 | 85 | assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); |
duke@435 | 86 | // Check to see if the klasses are identical. |
duke@435 | 87 | |
duke@435 | 88 | VM_ENTRY_MARK; |
duke@435 | 89 | Klass* this_klass = get_Klass(); |
duke@435 | 90 | klassOop that_klass = that->get_klassOop(); |
duke@435 | 91 | bool result = this_klass->is_subclass_of(that_klass); |
duke@435 | 92 | |
duke@435 | 93 | return result; |
duke@435 | 94 | } |
duke@435 | 95 | |
duke@435 | 96 | // ------------------------------------------------------------------ |
duke@435 | 97 | // ciKlass::super_depth |
duke@435 | 98 | juint ciKlass::super_depth() { |
duke@435 | 99 | assert(is_loaded(), "must be loaded"); |
duke@435 | 100 | assert(is_java_klass(), "must be java klasses"); |
duke@435 | 101 | |
duke@435 | 102 | VM_ENTRY_MARK; |
duke@435 | 103 | Klass* this_klass = get_Klass(); |
duke@435 | 104 | return this_klass->super_depth(); |
duke@435 | 105 | } |
duke@435 | 106 | |
duke@435 | 107 | // ------------------------------------------------------------------ |
duke@435 | 108 | // ciKlass::super_check_offset |
duke@435 | 109 | juint ciKlass::super_check_offset() { |
duke@435 | 110 | assert(is_loaded(), "must be loaded"); |
duke@435 | 111 | assert(is_java_klass(), "must be java klasses"); |
duke@435 | 112 | |
duke@435 | 113 | VM_ENTRY_MARK; |
duke@435 | 114 | Klass* this_klass = get_Klass(); |
duke@435 | 115 | return this_klass->super_check_offset(); |
duke@435 | 116 | } |
duke@435 | 117 | |
duke@435 | 118 | // ------------------------------------------------------------------ |
duke@435 | 119 | // ciKlass::super_of_depth |
duke@435 | 120 | ciKlass* ciKlass::super_of_depth(juint i) { |
duke@435 | 121 | assert(is_loaded(), "must be loaded"); |
duke@435 | 122 | assert(is_java_klass(), "must be java klasses"); |
duke@435 | 123 | |
duke@435 | 124 | VM_ENTRY_MARK; |
duke@435 | 125 | Klass* this_klass = get_Klass(); |
duke@435 | 126 | klassOop super = this_klass->primary_super_of_depth(i); |
duke@435 | 127 | return (super != NULL) ? CURRENT_THREAD_ENV->get_object(super)->as_klass() : NULL; |
duke@435 | 128 | } |
duke@435 | 129 | |
duke@435 | 130 | // ------------------------------------------------------------------ |
duke@435 | 131 | // ciKlass::can_be_primary_super |
duke@435 | 132 | bool ciKlass::can_be_primary_super() { |
duke@435 | 133 | assert(is_loaded(), "must be loaded"); |
duke@435 | 134 | assert(is_java_klass(), "must be java klasses"); |
duke@435 | 135 | |
duke@435 | 136 | VM_ENTRY_MARK; |
duke@435 | 137 | Klass* this_klass = get_Klass(); |
duke@435 | 138 | return this_klass->can_be_primary_super(); |
duke@435 | 139 | } |
duke@435 | 140 | |
duke@435 | 141 | // ------------------------------------------------------------------ |
duke@435 | 142 | // ciKlass::least_common_ancestor |
duke@435 | 143 | // |
duke@435 | 144 | // Get the shared parent of two klasses. |
duke@435 | 145 | // |
duke@435 | 146 | // Implementation note: this method currently goes "over the wall" |
duke@435 | 147 | // and does all of the work on the VM side. It could be rewritten |
duke@435 | 148 | // to use the super() method and do all of the work (aside from the |
duke@435 | 149 | // lazy computation of super()) in native mode. This may be |
duke@435 | 150 | // worthwhile if the compiler is repeatedly requesting the same lca |
duke@435 | 151 | // computation or possibly if most of the superklasses have already |
duke@435 | 152 | // been created as ciObjects anyway. Something to think about... |
duke@435 | 153 | ciKlass* |
duke@435 | 154 | ciKlass::least_common_ancestor(ciKlass* that) { |
duke@435 | 155 | assert(is_loaded() && that->is_loaded(), "must be loaded"); |
duke@435 | 156 | assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); |
duke@435 | 157 | // Check to see if the klasses are identical. |
duke@435 | 158 | if (this == that) { |
duke@435 | 159 | return this; |
duke@435 | 160 | } |
duke@435 | 161 | |
duke@435 | 162 | VM_ENTRY_MARK; |
duke@435 | 163 | Klass* this_klass = get_Klass(); |
duke@435 | 164 | Klass* that_klass = that->get_Klass(); |
duke@435 | 165 | Klass* lca = this_klass->LCA(that_klass); |
duke@435 | 166 | |
duke@435 | 167 | // Many times the LCA will be either this_klass or that_klass. |
duke@435 | 168 | // Treat these as special cases. |
duke@435 | 169 | if (lca == that_klass) { |
duke@435 | 170 | return that; |
duke@435 | 171 | } |
duke@435 | 172 | if (this_klass == lca) { |
duke@435 | 173 | return this; |
duke@435 | 174 | } |
duke@435 | 175 | |
duke@435 | 176 | // Create the ciInstanceKlass for the lca. |
duke@435 | 177 | ciKlass* result = |
duke@435 | 178 | CURRENT_THREAD_ENV->get_object(lca->as_klassOop())->as_klass(); |
duke@435 | 179 | |
duke@435 | 180 | return result; |
duke@435 | 181 | } |
duke@435 | 182 | |
duke@435 | 183 | // ------------------------------------------------------------------ |
duke@435 | 184 | // ciKlass::find_klass |
duke@435 | 185 | // |
duke@435 | 186 | // Find a klass using this klass's class loader. |
duke@435 | 187 | ciKlass* ciKlass::find_klass(ciSymbol* klass_name) { |
duke@435 | 188 | assert(is_loaded(), "cannot find_klass through an unloaded klass"); |
duke@435 | 189 | return CURRENT_ENV->get_klass_by_name(this, |
duke@435 | 190 | klass_name, false); |
duke@435 | 191 | } |
duke@435 | 192 | |
duke@435 | 193 | // ------------------------------------------------------------------ |
duke@435 | 194 | // ciKlass::java_mirror |
duke@435 | 195 | ciInstance* ciKlass::java_mirror() { |
duke@435 | 196 | GUARDED_VM_ENTRY( |
duke@435 | 197 | oop java_mirror = get_Klass()->java_mirror(); |
duke@435 | 198 | return CURRENT_ENV->get_object(java_mirror)->as_instance(); |
duke@435 | 199 | ) |
duke@435 | 200 | } |
duke@435 | 201 | |
duke@435 | 202 | // ------------------------------------------------------------------ |
duke@435 | 203 | // ciKlass::modifier_flags |
duke@435 | 204 | jint ciKlass::modifier_flags() { |
duke@435 | 205 | assert(is_loaded(), "not loaded"); |
duke@435 | 206 | GUARDED_VM_ENTRY( |
duke@435 | 207 | return get_Klass()->modifier_flags(); |
duke@435 | 208 | ) |
duke@435 | 209 | } |
duke@435 | 210 | |
duke@435 | 211 | // ------------------------------------------------------------------ |
duke@435 | 212 | // ciKlass::access_flags |
duke@435 | 213 | jint ciKlass::access_flags() { |
duke@435 | 214 | assert(is_loaded(), "not loaded"); |
duke@435 | 215 | GUARDED_VM_ENTRY( |
duke@435 | 216 | return get_Klass()->access_flags().as_int(); |
duke@435 | 217 | ) |
duke@435 | 218 | } |
duke@435 | 219 | |
duke@435 | 220 | // ------------------------------------------------------------------ |
duke@435 | 221 | // ciKlass::print_impl |
duke@435 | 222 | // |
duke@435 | 223 | // Implementation of the print method |
duke@435 | 224 | void ciKlass::print_impl(outputStream* st) { |
duke@435 | 225 | st->print(" name="); |
duke@435 | 226 | print_name_on(st); |
duke@435 | 227 | } |
duke@435 | 228 | |
duke@435 | 229 | // ------------------------------------------------------------------ |
duke@435 | 230 | // ciKlass::print_name |
duke@435 | 231 | // |
duke@435 | 232 | // Print the name of this klass |
duke@435 | 233 | void ciKlass::print_name_on(outputStream* st) { |
duke@435 | 234 | name()->print_symbol_on(st); |
duke@435 | 235 | } |