Mercurial > hg > truffle
annotate src/share/vm/ci/ciKlass.cpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children |
| rev | line source |
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| 0 | 1 /* |
| 17524 | 2 * Copyright (c) 1999, 2013, 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 // | |
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33 // This class represents a Klass* in the HotSpot virtual |
| 0 | 34 // machine. |
| 35 | |
| 36 // ------------------------------------------------------------------ | |
| 37 // ciKlass::ciKlass | |
| 38 ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) { | |
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39 assert(get_Klass()->is_klass(), "wrong type"); |
| 0 | 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) { | |
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52 assert(get_Klass()->is_klass(), "wrong type"); |
| 0 | 53 _name = name; |
| 54 _layout_helper = Klass::_lh_neutral_value; | |
| 55 } | |
| 56 | |
| 57 // ------------------------------------------------------------------ | |
| 58 // ciKlass::ciKlass | |
| 59 // | |
| 60 // Unloaded klass variant. | |
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61 ciKlass::ciKlass(ciSymbol* name, BasicType bt) : ciType(bt) { |
| 0 | 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) { | |
| 12871 | 69 assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii())); |
| 70 assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii())); | |
| 71 | |
| 0 | 72 // Check to see if the klasses are identical. |
| 73 if (this == that) { | |
| 74 return true; | |
| 75 } | |
| 76 | |
| 77 VM_ENTRY_MARK; | |
| 78 Klass* this_klass = get_Klass(); | |
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79 Klass* that_klass = that->get_Klass(); |
| 0 | 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) { | |
| 12871 | 88 assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii())); |
| 89 assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii())); | |
| 0 | 90 |
| 91 VM_ENTRY_MARK; | |
| 92 Klass* this_klass = get_Klass(); | |
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93 Klass* that_klass = that->get_Klass(); |
| 0 | 94 bool result = this_klass->is_subclass_of(that_klass); |
| 95 | |
| 96 return result; | |
| 97 } | |
| 98 | |
| 99 // ------------------------------------------------------------------ | |
| 100 // ciKlass::super_depth | |
| 101 juint ciKlass::super_depth() { | |
| 102 assert(is_loaded(), "must be loaded"); | |
| 103 | |
| 104 VM_ENTRY_MARK; | |
| 105 Klass* this_klass = get_Klass(); | |
| 106 return this_klass->super_depth(); | |
| 107 } | |
| 108 | |
| 109 // ------------------------------------------------------------------ | |
| 110 // ciKlass::super_check_offset | |
| 111 juint ciKlass::super_check_offset() { | |
| 112 assert(is_loaded(), "must be loaded"); | |
| 113 | |
| 114 VM_ENTRY_MARK; | |
| 115 Klass* this_klass = get_Klass(); | |
| 116 return this_klass->super_check_offset(); | |
| 117 } | |
| 118 | |
| 119 // ------------------------------------------------------------------ | |
| 120 // ciKlass::super_of_depth | |
| 121 ciKlass* ciKlass::super_of_depth(juint i) { | |
| 122 assert(is_loaded(), "must be loaded"); | |
| 123 | |
| 124 VM_ENTRY_MARK; | |
| 125 Klass* this_klass = get_Klass(); | |
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126 Klass* super = this_klass->primary_super_of_depth(i); |
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127 return (super != NULL) ? CURRENT_THREAD_ENV->get_klass(super) : NULL; |
| 0 | 128 } |
| 129 | |
| 130 // ------------------------------------------------------------------ | |
| 131 // ciKlass::can_be_primary_super | |
| 132 bool ciKlass::can_be_primary_super() { | |
| 133 assert(is_loaded(), "must be loaded"); | |
| 134 | |
| 135 VM_ENTRY_MARK; | |
| 136 Klass* this_klass = get_Klass(); | |
| 137 return this_klass->can_be_primary_super(); | |
| 138 } | |
| 139 | |
| 140 // ------------------------------------------------------------------ | |
| 141 // ciKlass::least_common_ancestor | |
| 142 // | |
| 143 // Get the shared parent of two klasses. | |
| 144 // | |
| 145 // Implementation note: this method currently goes "over the wall" | |
| 146 // and does all of the work on the VM side. It could be rewritten | |
| 147 // to use the super() method and do all of the work (aside from the | |
| 148 // lazy computation of super()) in native mode. This may be | |
| 149 // worthwhile if the compiler is repeatedly requesting the same lca | |
| 150 // computation or possibly if most of the superklasses have already | |
| 151 // been created as ciObjects anyway. Something to think about... | |
| 152 ciKlass* | |
| 153 ciKlass::least_common_ancestor(ciKlass* that) { | |
| 154 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 155 // Check to see if the klasses are identical. | |
| 156 if (this == that) { | |
| 157 return this; | |
| 158 } | |
| 159 | |
| 160 VM_ENTRY_MARK; | |
| 161 Klass* this_klass = get_Klass(); | |
| 162 Klass* that_klass = that->get_Klass(); | |
| 163 Klass* lca = this_klass->LCA(that_klass); | |
| 164 | |
| 165 // Many times the LCA will be either this_klass or that_klass. | |
| 166 // Treat these as special cases. | |
| 167 if (lca == that_klass) { | |
| 168 return that; | |
| 169 } | |
| 170 if (this_klass == lca) { | |
| 171 return this; | |
| 172 } | |
| 173 | |
| 174 // Create the ciInstanceKlass for the lca. | |
| 175 ciKlass* result = | |
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176 CURRENT_THREAD_ENV->get_klass(lca); |
| 0 | 177 |
| 178 return result; | |
| 179 } | |
| 180 | |
| 181 // ------------------------------------------------------------------ | |
| 182 // ciKlass::find_klass | |
| 183 // | |
| 184 // Find a klass using this klass's class loader. | |
| 185 ciKlass* ciKlass::find_klass(ciSymbol* klass_name) { | |
| 186 assert(is_loaded(), "cannot find_klass through an unloaded klass"); | |
| 187 return CURRENT_ENV->get_klass_by_name(this, | |
| 188 klass_name, false); | |
| 189 } | |
| 190 | |
| 191 // ------------------------------------------------------------------ | |
| 192 // ciKlass::java_mirror | |
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193 // |
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194 // Get the instance of java.lang.Class corresponding to this klass. |
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195 // If it is an unloaded instance or array klass, return an unloaded |
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196 // mirror object of type Class. |
| 0 | 197 ciInstance* ciKlass::java_mirror() { |
| 198 GUARDED_VM_ENTRY( | |
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199 if (!is_loaded()) |
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200 return ciEnv::current()->get_unloaded_klass_mirror(this); |
| 0 | 201 oop java_mirror = get_Klass()->java_mirror(); |
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202 return CURRENT_ENV->get_instance(java_mirror); |
| 0 | 203 ) |
| 204 } | |
| 205 | |
| 206 // ------------------------------------------------------------------ | |
| 207 // ciKlass::modifier_flags | |
| 208 jint ciKlass::modifier_flags() { | |
| 209 assert(is_loaded(), "not loaded"); | |
| 210 GUARDED_VM_ENTRY( | |
| 211 return get_Klass()->modifier_flags(); | |
| 212 ) | |
| 213 } | |
| 214 | |
| 215 // ------------------------------------------------------------------ | |
| 216 // ciKlass::access_flags | |
| 217 jint ciKlass::access_flags() { | |
| 218 assert(is_loaded(), "not loaded"); | |
| 219 GUARDED_VM_ENTRY( | |
| 220 return get_Klass()->access_flags().as_int(); | |
| 221 ) | |
| 222 } | |
| 223 | |
| 224 // ------------------------------------------------------------------ | |
| 225 // ciKlass::print_impl | |
| 226 // | |
| 227 // Implementation of the print method | |
| 228 void ciKlass::print_impl(outputStream* st) { | |
| 229 st->print(" name="); | |
| 230 print_name_on(st); | |
| 231 } | |
| 232 | |
| 233 // ------------------------------------------------------------------ | |
| 234 // ciKlass::print_name | |
| 235 // | |
| 236 // Print the name of this klass | |
| 237 void ciKlass::print_name_on(outputStream* st) { | |
| 238 name()->print_symbol_on(st); | |
| 239 } |