Mercurial > hg > truffle
annotate src/share/vm/ci/ciKlass.cpp @ 4977:532be189cf09
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| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Mon, 27 Feb 2012 17:06:18 +0100 |
| parents | 5e331d5f760e |
| children | e522a00b91aa |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/ciKlass.hpp" | |
| 27 #include "ci/ciSymbol.hpp" | |
| 28 #include "ci/ciUtilities.hpp" | |
| 29 #include "oops/oop.inline.hpp" | |
| 0 | 30 |
| 31 // ciKlass | |
| 32 // | |
| 33 // This class represents a klassOop in the HotSpot virtual | |
| 34 // machine. | |
| 35 | |
| 36 // ------------------------------------------------------------------ | |
| 37 // ciKlass::ciKlass | |
| 38 ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) { | |
| 39 assert(get_oop()->is_klass(), "wrong type"); | |
| 40 Klass* k = get_Klass(); | |
| 41 _layout_helper = k->layout_helper(); | |
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42 Symbol* klass_name = k->name(); |
| 0 | 43 assert(klass_name != NULL, "wrong ciKlass constructor"); |
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44 _name = CURRENT_ENV->get_symbol(klass_name); |
| 0 | 45 } |
| 46 | |
| 47 // ------------------------------------------------------------------ | |
| 48 // ciKlass::ciKlass | |
| 49 // | |
| 50 // Nameless klass variant. | |
| 51 ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) { | |
| 52 assert(get_oop()->is_klass(), "wrong type"); | |
| 53 _name = name; | |
| 54 _layout_helper = Klass::_lh_neutral_value; | |
| 55 } | |
| 56 | |
| 57 // ------------------------------------------------------------------ | |
| 58 // ciKlass::ciKlass | |
| 59 // | |
| 60 // Unloaded klass variant. | |
| 61 ciKlass::ciKlass(ciSymbol* name, ciKlass* klass) : ciType(klass) { | |
| 62 _name = name; | |
| 63 _layout_helper = Klass::_lh_neutral_value; | |
| 64 } | |
| 65 | |
| 66 // ------------------------------------------------------------------ | |
| 67 // ciKlass::is_subtype_of | |
| 68 bool ciKlass::is_subtype_of(ciKlass* that) { | |
| 69 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 70 assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); | |
| 71 // Check to see if the klasses are identical. | |
| 72 if (this == that) { | |
| 73 return true; | |
| 74 } | |
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75 #ifndef GRAAL |
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76 VM_ENTRY_MARK; |
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77 #endif |
| 0 | 78 Klass* this_klass = get_Klass(); |
| 79 klassOop that_klass = that->get_klassOop(); | |
| 80 bool result = this_klass->is_subtype_of(that_klass); | |
| 81 | |
| 82 return result; | |
| 83 } | |
| 84 | |
| 85 // ------------------------------------------------------------------ | |
| 86 // ciKlass::is_subclass_of | |
| 87 bool ciKlass::is_subclass_of(ciKlass* that) { | |
| 88 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 89 assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); | |
| 90 // Check to see if the klasses are identical. | |
| 91 | |
| 92 VM_ENTRY_MARK; | |
| 93 Klass* this_klass = get_Klass(); | |
| 94 klassOop that_klass = that->get_klassOop(); | |
| 95 bool result = this_klass->is_subclass_of(that_klass); | |
| 96 | |
| 97 return result; | |
| 98 } | |
| 99 | |
| 100 // ------------------------------------------------------------------ | |
| 101 // ciKlass::super_depth | |
| 102 juint ciKlass::super_depth() { | |
| 103 assert(is_loaded(), "must be loaded"); | |
| 104 assert(is_java_klass(), "must be java klasses"); | |
| 105 | |
| 106 VM_ENTRY_MARK; | |
| 107 Klass* this_klass = get_Klass(); | |
| 108 return this_klass->super_depth(); | |
| 109 } | |
| 110 | |
| 111 // ------------------------------------------------------------------ | |
| 112 // ciKlass::super_check_offset | |
| 113 juint ciKlass::super_check_offset() { | |
| 114 assert(is_loaded(), "must be loaded"); | |
| 115 assert(is_java_klass(), "must be java klasses"); | |
| 116 | |
| 117 VM_ENTRY_MARK; | |
| 118 Klass* this_klass = get_Klass(); | |
| 119 return this_klass->super_check_offset(); | |
| 120 } | |
| 121 | |
| 122 // ------------------------------------------------------------------ | |
| 123 // ciKlass::super_of_depth | |
| 124 ciKlass* ciKlass::super_of_depth(juint i) { | |
| 125 assert(is_loaded(), "must be loaded"); | |
| 126 assert(is_java_klass(), "must be java klasses"); | |
| 127 | |
| 128 VM_ENTRY_MARK; | |
| 129 Klass* this_klass = get_Klass(); | |
| 130 klassOop super = this_klass->primary_super_of_depth(i); | |
| 131 return (super != NULL) ? CURRENT_THREAD_ENV->get_object(super)->as_klass() : NULL; | |
| 132 } | |
| 133 | |
| 134 // ------------------------------------------------------------------ | |
| 135 // ciKlass::can_be_primary_super | |
| 136 bool ciKlass::can_be_primary_super() { | |
| 137 assert(is_loaded(), "must be loaded"); | |
| 138 assert(is_java_klass(), "must be java klasses"); | |
| 139 | |
| 140 VM_ENTRY_MARK; | |
| 141 Klass* this_klass = get_Klass(); | |
| 142 return this_klass->can_be_primary_super(); | |
| 143 } | |
| 144 | |
| 145 // ------------------------------------------------------------------ | |
| 146 // ciKlass::least_common_ancestor | |
| 147 // | |
| 148 // Get the shared parent of two klasses. | |
| 149 // | |
| 150 // Implementation note: this method currently goes "over the wall" | |
| 151 // and does all of the work on the VM side. It could be rewritten | |
| 152 // to use the super() method and do all of the work (aside from the | |
| 153 // lazy computation of super()) in native mode. This may be | |
| 154 // worthwhile if the compiler is repeatedly requesting the same lca | |
| 155 // computation or possibly if most of the superklasses have already | |
| 156 // been created as ciObjects anyway. Something to think about... | |
| 157 ciKlass* | |
| 158 ciKlass::least_common_ancestor(ciKlass* that) { | |
| 159 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 160 assert(is_java_klass() && that->is_java_klass(), "must be java klasses"); | |
| 161 // Check to see if the klasses are identical. | |
| 162 if (this == that) { | |
| 163 return this; | |
| 164 } | |
| 165 | |
| 166 VM_ENTRY_MARK; | |
| 167 Klass* this_klass = get_Klass(); | |
| 168 Klass* that_klass = that->get_Klass(); | |
| 169 Klass* lca = this_klass->LCA(that_klass); | |
| 170 | |
| 171 // Many times the LCA will be either this_klass or that_klass. | |
| 172 // Treat these as special cases. | |
| 173 if (lca == that_klass) { | |
| 174 return that; | |
| 175 } | |
| 176 if (this_klass == lca) { | |
| 177 return this; | |
| 178 } | |
| 179 | |
| 180 // Create the ciInstanceKlass for the lca. | |
| 181 ciKlass* result = | |
| 182 CURRENT_THREAD_ENV->get_object(lca->as_klassOop())->as_klass(); | |
| 183 | |
| 184 return result; | |
| 185 } | |
| 186 | |
| 187 // ------------------------------------------------------------------ | |
| 188 // ciKlass::find_klass | |
| 189 // | |
| 190 // Find a klass using this klass's class loader. | |
| 191 ciKlass* ciKlass::find_klass(ciSymbol* klass_name) { | |
| 192 assert(is_loaded(), "cannot find_klass through an unloaded klass"); | |
| 193 return CURRENT_ENV->get_klass_by_name(this, | |
| 194 klass_name, false); | |
| 195 } | |
| 196 | |
| 197 // ------------------------------------------------------------------ | |
| 198 // ciKlass::java_mirror | |
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199 // |
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200 // Get the instance of java.lang.Class corresponding to this klass. |
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201 // If it is an unloaded instance or array klass, return an unloaded |
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202 // mirror object of type Class. |
| 0 | 203 ciInstance* ciKlass::java_mirror() { |
| 204 GUARDED_VM_ENTRY( | |
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205 if (!is_loaded()) |
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206 return ciEnv::current()->get_unloaded_klass_mirror(this); |
| 0 | 207 oop java_mirror = get_Klass()->java_mirror(); |
| 208 return CURRENT_ENV->get_object(java_mirror)->as_instance(); | |
| 209 ) | |
| 210 } | |
| 211 | |
| 212 // ------------------------------------------------------------------ | |
| 213 // ciKlass::modifier_flags | |
| 214 jint ciKlass::modifier_flags() { | |
| 215 assert(is_loaded(), "not loaded"); | |
| 216 GUARDED_VM_ENTRY( | |
| 217 return get_Klass()->modifier_flags(); | |
| 218 ) | |
| 219 } | |
| 220 | |
| 221 // ------------------------------------------------------------------ | |
| 222 // ciKlass::access_flags | |
| 223 jint ciKlass::access_flags() { | |
| 224 assert(is_loaded(), "not loaded"); | |
| 225 GUARDED_VM_ENTRY( | |
| 226 return get_Klass()->access_flags().as_int(); | |
| 227 ) | |
| 228 } | |
| 229 | |
| 230 // ------------------------------------------------------------------ | |
| 231 // ciKlass::print_impl | |
| 232 // | |
| 233 // Implementation of the print method | |
| 234 void ciKlass::print_impl(outputStream* st) { | |
| 235 st->print(" name="); | |
| 236 print_name_on(st); | |
| 237 } | |
| 238 | |
| 239 // ------------------------------------------------------------------ | |
| 240 // ciKlass::print_name | |
| 241 // | |
| 242 // Print the name of this klass | |
| 243 void ciKlass::print_name_on(outputStream* st) { | |
| 244 name()->print_symbol_on(st); | |
| 245 } |