Wed, 27 Apr 2016 01:25:04 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "ci/ciKlass.hpp" |
aoqi@0 | 27 | #include "ci/ciSymbol.hpp" |
aoqi@0 | 28 | #include "ci/ciUtilities.hpp" |
aoqi@0 | 29 | #include "oops/oop.inline.hpp" |
aoqi@0 | 30 | |
aoqi@0 | 31 | // ciKlass |
aoqi@0 | 32 | // |
aoqi@0 | 33 | // This class represents a Klass* in the HotSpot virtual |
aoqi@0 | 34 | // machine. |
aoqi@0 | 35 | |
aoqi@0 | 36 | // ------------------------------------------------------------------ |
aoqi@0 | 37 | // ciKlass::ciKlass |
aoqi@0 | 38 | ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) { |
aoqi@0 | 39 | assert(get_Klass()->is_klass(), "wrong type"); |
aoqi@0 | 40 | Klass* k = get_Klass(); |
aoqi@0 | 41 | _layout_helper = k->layout_helper(); |
aoqi@0 | 42 | Symbol* klass_name = k->name(); |
aoqi@0 | 43 | assert(klass_name != NULL, "wrong ciKlass constructor"); |
aoqi@0 | 44 | _name = CURRENT_ENV->get_symbol(klass_name); |
aoqi@0 | 45 | } |
aoqi@0 | 46 | |
aoqi@0 | 47 | // ------------------------------------------------------------------ |
aoqi@0 | 48 | // ciKlass::ciKlass |
aoqi@0 | 49 | // |
aoqi@0 | 50 | // Nameless klass variant. |
aoqi@0 | 51 | ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) { |
aoqi@0 | 52 | assert(get_Klass()->is_klass(), "wrong type"); |
aoqi@0 | 53 | _name = name; |
aoqi@0 | 54 | _layout_helper = Klass::_lh_neutral_value; |
aoqi@0 | 55 | } |
aoqi@0 | 56 | |
aoqi@0 | 57 | // ------------------------------------------------------------------ |
aoqi@0 | 58 | // ciKlass::ciKlass |
aoqi@0 | 59 | // |
aoqi@0 | 60 | // Unloaded klass variant. |
aoqi@0 | 61 | ciKlass::ciKlass(ciSymbol* name, BasicType bt) : ciType(bt) { |
aoqi@0 | 62 | _name = name; |
aoqi@0 | 63 | _layout_helper = Klass::_lh_neutral_value; |
aoqi@0 | 64 | } |
aoqi@0 | 65 | |
aoqi@0 | 66 | // ------------------------------------------------------------------ |
aoqi@0 | 67 | // ciKlass::is_subtype_of |
aoqi@0 | 68 | bool ciKlass::is_subtype_of(ciKlass* that) { |
aoqi@0 | 69 | assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii())); |
aoqi@0 | 70 | assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii())); |
aoqi@0 | 71 | |
aoqi@0 | 72 | // Check to see if the klasses are identical. |
aoqi@0 | 73 | if (this == that) { |
aoqi@0 | 74 | return true; |
aoqi@0 | 75 | } |
aoqi@0 | 76 | |
aoqi@0 | 77 | VM_ENTRY_MARK; |
aoqi@0 | 78 | Klass* this_klass = get_Klass(); |
aoqi@0 | 79 | Klass* that_klass = that->get_Klass(); |
aoqi@0 | 80 | bool result = this_klass->is_subtype_of(that_klass); |
aoqi@0 | 81 | |
aoqi@0 | 82 | return result; |
aoqi@0 | 83 | } |
aoqi@0 | 84 | |
aoqi@0 | 85 | // ------------------------------------------------------------------ |
aoqi@0 | 86 | // ciKlass::is_subclass_of |
aoqi@0 | 87 | bool ciKlass::is_subclass_of(ciKlass* that) { |
aoqi@0 | 88 | assert(this->is_loaded(), err_msg("must be loaded: %s", this->name()->as_quoted_ascii())); |
aoqi@0 | 89 | assert(that->is_loaded(), err_msg("must be loaded: %s", that->name()->as_quoted_ascii())); |
aoqi@0 | 90 | |
aoqi@0 | 91 | VM_ENTRY_MARK; |
aoqi@0 | 92 | Klass* this_klass = get_Klass(); |
aoqi@0 | 93 | Klass* that_klass = that->get_Klass(); |
aoqi@0 | 94 | bool result = this_klass->is_subclass_of(that_klass); |
aoqi@0 | 95 | |
aoqi@0 | 96 | return result; |
aoqi@0 | 97 | } |
aoqi@0 | 98 | |
aoqi@0 | 99 | // ------------------------------------------------------------------ |
aoqi@0 | 100 | // ciKlass::super_depth |
aoqi@0 | 101 | juint ciKlass::super_depth() { |
aoqi@0 | 102 | assert(is_loaded(), "must be loaded"); |
aoqi@0 | 103 | |
aoqi@0 | 104 | VM_ENTRY_MARK; |
aoqi@0 | 105 | Klass* this_klass = get_Klass(); |
aoqi@0 | 106 | return this_klass->super_depth(); |
aoqi@0 | 107 | } |
aoqi@0 | 108 | |
aoqi@0 | 109 | // ------------------------------------------------------------------ |
aoqi@0 | 110 | // ciKlass::super_check_offset |
aoqi@0 | 111 | juint ciKlass::super_check_offset() { |
aoqi@0 | 112 | assert(is_loaded(), "must be loaded"); |
aoqi@0 | 113 | |
aoqi@0 | 114 | VM_ENTRY_MARK; |
aoqi@0 | 115 | Klass* this_klass = get_Klass(); |
aoqi@0 | 116 | return this_klass->super_check_offset(); |
aoqi@0 | 117 | } |
aoqi@0 | 118 | |
aoqi@0 | 119 | // ------------------------------------------------------------------ |
aoqi@0 | 120 | // ciKlass::super_of_depth |
aoqi@0 | 121 | ciKlass* ciKlass::super_of_depth(juint i) { |
aoqi@0 | 122 | assert(is_loaded(), "must be loaded"); |
aoqi@0 | 123 | |
aoqi@0 | 124 | VM_ENTRY_MARK; |
aoqi@0 | 125 | Klass* this_klass = get_Klass(); |
aoqi@0 | 126 | Klass* super = this_klass->primary_super_of_depth(i); |
aoqi@0 | 127 | return (super != NULL) ? CURRENT_THREAD_ENV->get_klass(super) : NULL; |
aoqi@0 | 128 | } |
aoqi@0 | 129 | |
aoqi@0 | 130 | // ------------------------------------------------------------------ |
aoqi@0 | 131 | // ciKlass::can_be_primary_super |
aoqi@0 | 132 | bool ciKlass::can_be_primary_super() { |
aoqi@0 | 133 | assert(is_loaded(), "must be loaded"); |
aoqi@0 | 134 | |
aoqi@0 | 135 | VM_ENTRY_MARK; |
aoqi@0 | 136 | Klass* this_klass = get_Klass(); |
aoqi@0 | 137 | return this_klass->can_be_primary_super(); |
aoqi@0 | 138 | } |
aoqi@0 | 139 | |
aoqi@0 | 140 | // ------------------------------------------------------------------ |
aoqi@0 | 141 | // ciKlass::least_common_ancestor |
aoqi@0 | 142 | // |
aoqi@0 | 143 | // Get the shared parent of two klasses. |
aoqi@0 | 144 | // |
aoqi@0 | 145 | // Implementation note: this method currently goes "over the wall" |
aoqi@0 | 146 | // and does all of the work on the VM side. It could be rewritten |
aoqi@0 | 147 | // to use the super() method and do all of the work (aside from the |
aoqi@0 | 148 | // lazy computation of super()) in native mode. This may be |
aoqi@0 | 149 | // worthwhile if the compiler is repeatedly requesting the same lca |
aoqi@0 | 150 | // computation or possibly if most of the superklasses have already |
aoqi@0 | 151 | // been created as ciObjects anyway. Something to think about... |
aoqi@0 | 152 | ciKlass* |
aoqi@0 | 153 | ciKlass::least_common_ancestor(ciKlass* that) { |
aoqi@0 | 154 | assert(is_loaded() && that->is_loaded(), "must be loaded"); |
aoqi@0 | 155 | // Check to see if the klasses are identical. |
aoqi@0 | 156 | if (this == that) { |
aoqi@0 | 157 | return this; |
aoqi@0 | 158 | } |
aoqi@0 | 159 | |
aoqi@0 | 160 | VM_ENTRY_MARK; |
aoqi@0 | 161 | Klass* this_klass = get_Klass(); |
aoqi@0 | 162 | Klass* that_klass = that->get_Klass(); |
aoqi@0 | 163 | Klass* lca = this_klass->LCA(that_klass); |
aoqi@0 | 164 | |
aoqi@0 | 165 | // Many times the LCA will be either this_klass or that_klass. |
aoqi@0 | 166 | // Treat these as special cases. |
aoqi@0 | 167 | if (lca == that_klass) { |
aoqi@0 | 168 | return that; |
aoqi@0 | 169 | } |
aoqi@0 | 170 | if (this_klass == lca) { |
aoqi@0 | 171 | return this; |
aoqi@0 | 172 | } |
aoqi@0 | 173 | |
aoqi@0 | 174 | // Create the ciInstanceKlass for the lca. |
aoqi@0 | 175 | ciKlass* result = |
aoqi@0 | 176 | CURRENT_THREAD_ENV->get_klass(lca); |
aoqi@0 | 177 | |
aoqi@0 | 178 | return result; |
aoqi@0 | 179 | } |
aoqi@0 | 180 | |
aoqi@0 | 181 | // ------------------------------------------------------------------ |
aoqi@0 | 182 | // ciKlass::find_klass |
aoqi@0 | 183 | // |
aoqi@0 | 184 | // Find a klass using this klass's class loader. |
aoqi@0 | 185 | ciKlass* ciKlass::find_klass(ciSymbol* klass_name) { |
aoqi@0 | 186 | assert(is_loaded(), "cannot find_klass through an unloaded klass"); |
aoqi@0 | 187 | return CURRENT_ENV->get_klass_by_name(this, |
aoqi@0 | 188 | klass_name, false); |
aoqi@0 | 189 | } |
aoqi@0 | 190 | |
aoqi@0 | 191 | // ------------------------------------------------------------------ |
aoqi@0 | 192 | // ciKlass::java_mirror |
aoqi@0 | 193 | // |
aoqi@0 | 194 | // Get the instance of java.lang.Class corresponding to this klass. |
aoqi@0 | 195 | // If it is an unloaded instance or array klass, return an unloaded |
aoqi@0 | 196 | // mirror object of type Class. |
aoqi@0 | 197 | ciInstance* ciKlass::java_mirror() { |
aoqi@0 | 198 | GUARDED_VM_ENTRY( |
aoqi@0 | 199 | if (!is_loaded()) |
aoqi@0 | 200 | return ciEnv::current()->get_unloaded_klass_mirror(this); |
aoqi@0 | 201 | oop java_mirror = get_Klass()->java_mirror(); |
aoqi@0 | 202 | return CURRENT_ENV->get_instance(java_mirror); |
aoqi@0 | 203 | ) |
aoqi@0 | 204 | } |
aoqi@0 | 205 | |
aoqi@0 | 206 | // ------------------------------------------------------------------ |
aoqi@0 | 207 | // ciKlass::modifier_flags |
aoqi@0 | 208 | jint ciKlass::modifier_flags() { |
aoqi@0 | 209 | assert(is_loaded(), "not loaded"); |
aoqi@0 | 210 | GUARDED_VM_ENTRY( |
aoqi@0 | 211 | return get_Klass()->modifier_flags(); |
aoqi@0 | 212 | ) |
aoqi@0 | 213 | } |
aoqi@0 | 214 | |
aoqi@0 | 215 | // ------------------------------------------------------------------ |
aoqi@0 | 216 | // ciKlass::access_flags |
aoqi@0 | 217 | jint ciKlass::access_flags() { |
aoqi@0 | 218 | assert(is_loaded(), "not loaded"); |
aoqi@0 | 219 | GUARDED_VM_ENTRY( |
aoqi@0 | 220 | return get_Klass()->access_flags().as_int(); |
aoqi@0 | 221 | ) |
aoqi@0 | 222 | } |
aoqi@0 | 223 | |
aoqi@0 | 224 | // ------------------------------------------------------------------ |
aoqi@0 | 225 | // ciKlass::print_impl |
aoqi@0 | 226 | // |
aoqi@0 | 227 | // Implementation of the print method |
aoqi@0 | 228 | void ciKlass::print_impl(outputStream* st) { |
aoqi@0 | 229 | st->print(" name="); |
aoqi@0 | 230 | print_name_on(st); |
aoqi@0 | 231 | } |
aoqi@0 | 232 | |
aoqi@0 | 233 | // ------------------------------------------------------------------ |
aoqi@0 | 234 | // ciKlass::print_name |
aoqi@0 | 235 | // |
aoqi@0 | 236 | // Print the name of this klass |
aoqi@0 | 237 | void ciKlass::print_name_on(outputStream* st) { |
aoqi@0 | 238 | name()->print_symbol_on(st); |
aoqi@0 | 239 | } |