Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciKlass.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 1d1603768966 |
| children | e522a00b91aa 6171eb9da4fd |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, 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) { | |
| 69 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 70 // Check to see if the klasses are identical. | |
| 71 if (this == that) { | |
| 72 return true; | |
| 73 } | |
| 74 | |
| 75 VM_ENTRY_MARK; | |
| 76 Klass* this_klass = get_Klass(); | |
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77 Klass* that_klass = that->get_Klass(); |
| 0 | 78 bool result = this_klass->is_subtype_of(that_klass); |
| 79 | |
| 80 return result; | |
| 81 } | |
| 82 | |
| 83 // ------------------------------------------------------------------ | |
| 84 // ciKlass::is_subclass_of | |
| 85 bool ciKlass::is_subclass_of(ciKlass* that) { | |
| 86 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 87 // Check to see if the klasses are identical. | |
| 88 | |
| 89 VM_ENTRY_MARK; | |
| 90 Klass* this_klass = get_Klass(); | |
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91 Klass* that_klass = that->get_Klass(); |
| 0 | 92 bool result = this_klass->is_subclass_of(that_klass); |
| 93 | |
| 94 return result; | |
| 95 } | |
| 96 | |
| 97 // ------------------------------------------------------------------ | |
| 98 // ciKlass::super_depth | |
| 99 juint ciKlass::super_depth() { | |
| 100 assert(is_loaded(), "must be loaded"); | |
| 101 | |
| 102 VM_ENTRY_MARK; | |
| 103 Klass* this_klass = get_Klass(); | |
| 104 return this_klass->super_depth(); | |
| 105 } | |
| 106 | |
| 107 // ------------------------------------------------------------------ | |
| 108 // ciKlass::super_check_offset | |
| 109 juint ciKlass::super_check_offset() { | |
| 110 assert(is_loaded(), "must be loaded"); | |
| 111 | |
| 112 VM_ENTRY_MARK; | |
| 113 Klass* this_klass = get_Klass(); | |
| 114 return this_klass->super_check_offset(); | |
| 115 } | |
| 116 | |
| 117 // ------------------------------------------------------------------ | |
| 118 // ciKlass::super_of_depth | |
| 119 ciKlass* ciKlass::super_of_depth(juint i) { | |
| 120 assert(is_loaded(), "must be loaded"); | |
| 121 | |
| 122 VM_ENTRY_MARK; | |
| 123 Klass* this_klass = get_Klass(); | |
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124 Klass* super = this_klass->primary_super_of_depth(i); |
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125 return (super != NULL) ? CURRENT_THREAD_ENV->get_klass(super) : NULL; |
| 0 | 126 } |
| 127 | |
| 128 // ------------------------------------------------------------------ | |
| 129 // ciKlass::can_be_primary_super | |
| 130 bool ciKlass::can_be_primary_super() { | |
| 131 assert(is_loaded(), "must be loaded"); | |
| 132 | |
| 133 VM_ENTRY_MARK; | |
| 134 Klass* this_klass = get_Klass(); | |
| 135 return this_klass->can_be_primary_super(); | |
| 136 } | |
| 137 | |
| 138 // ------------------------------------------------------------------ | |
| 139 // ciKlass::least_common_ancestor | |
| 140 // | |
| 141 // Get the shared parent of two klasses. | |
| 142 // | |
| 143 // Implementation note: this method currently goes "over the wall" | |
| 144 // and does all of the work on the VM side. It could be rewritten | |
| 145 // to use the super() method and do all of the work (aside from the | |
| 146 // lazy computation of super()) in native mode. This may be | |
| 147 // worthwhile if the compiler is repeatedly requesting the same lca | |
| 148 // computation or possibly if most of the superklasses have already | |
| 149 // been created as ciObjects anyway. Something to think about... | |
| 150 ciKlass* | |
| 151 ciKlass::least_common_ancestor(ciKlass* that) { | |
| 152 assert(is_loaded() && that->is_loaded(), "must be loaded"); | |
| 153 // Check to see if the klasses are identical. | |
| 154 if (this == that) { | |
| 155 return this; | |
| 156 } | |
| 157 | |
| 158 VM_ENTRY_MARK; | |
| 159 Klass* this_klass = get_Klass(); | |
| 160 Klass* that_klass = that->get_Klass(); | |
| 161 Klass* lca = this_klass->LCA(that_klass); | |
| 162 | |
| 163 // Many times the LCA will be either this_klass or that_klass. | |
| 164 // Treat these as special cases. | |
| 165 if (lca == that_klass) { | |
| 166 return that; | |
| 167 } | |
| 168 if (this_klass == lca) { | |
| 169 return this; | |
| 170 } | |
| 171 | |
| 172 // Create the ciInstanceKlass for the lca. | |
| 173 ciKlass* result = | |
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174 CURRENT_THREAD_ENV->get_klass(lca); |
| 0 | 175 |
| 176 return result; | |
| 177 } | |
| 178 | |
| 179 // ------------------------------------------------------------------ | |
| 180 // ciKlass::find_klass | |
| 181 // | |
| 182 // Find a klass using this klass's class loader. | |
| 183 ciKlass* ciKlass::find_klass(ciSymbol* klass_name) { | |
| 184 assert(is_loaded(), "cannot find_klass through an unloaded klass"); | |
| 185 return CURRENT_ENV->get_klass_by_name(this, | |
| 186 klass_name, false); | |
| 187 } | |
| 188 | |
| 189 // ------------------------------------------------------------------ | |
| 190 // ciKlass::java_mirror | |
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191 // |
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192 // Get the instance of java.lang.Class corresponding to this klass. |
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193 // If it is an unloaded instance or array klass, return an unloaded |
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194 // mirror object of type Class. |
| 0 | 195 ciInstance* ciKlass::java_mirror() { |
| 196 GUARDED_VM_ENTRY( | |
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197 if (!is_loaded()) |
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198 return ciEnv::current()->get_unloaded_klass_mirror(this); |
| 0 | 199 oop java_mirror = get_Klass()->java_mirror(); |
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200 return CURRENT_ENV->get_instance(java_mirror); |
| 0 | 201 ) |
| 202 } | |
| 203 | |
| 204 // ------------------------------------------------------------------ | |
| 205 // ciKlass::modifier_flags | |
| 206 jint ciKlass::modifier_flags() { | |
| 207 assert(is_loaded(), "not loaded"); | |
| 208 GUARDED_VM_ENTRY( | |
| 209 return get_Klass()->modifier_flags(); | |
| 210 ) | |
| 211 } | |
| 212 | |
| 213 // ------------------------------------------------------------------ | |
| 214 // ciKlass::access_flags | |
| 215 jint ciKlass::access_flags() { | |
| 216 assert(is_loaded(), "not loaded"); | |
| 217 GUARDED_VM_ENTRY( | |
| 218 return get_Klass()->access_flags().as_int(); | |
| 219 ) | |
| 220 } | |
| 221 | |
| 222 // ------------------------------------------------------------------ | |
| 223 // ciKlass::print_impl | |
| 224 // | |
| 225 // Implementation of the print method | |
| 226 void ciKlass::print_impl(outputStream* st) { | |
| 227 st->print(" name="); | |
| 228 print_name_on(st); | |
| 229 } | |
| 230 | |
| 231 // ------------------------------------------------------------------ | |
| 232 // ciKlass::print_name | |
| 233 // | |
| 234 // Print the name of this klass | |
| 235 void ciKlass::print_name_on(outputStream* st) { | |
| 236 name()->print_symbol_on(st); | |
| 237 } |