Mercurial > hg > truffle
annotate src/share/vm/oops/klassKlass.cpp @ 2376:c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
Reviewed-by: kvn, coleenp, twisti, stefank
| author | never |
|---|---|
| date | Fri, 18 Mar 2011 16:00:34 -0700 |
| parents | e5383553fd4e |
| children | 0654ee04b214 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2227 | 2 * Copyright (c) 1997, 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 "gc_implementation/shared/markSweep.inline.hpp" | |
| 27 #include "gc_interface/collectedHeap.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "memory/oopFactory.hpp" | |
| 30 #include "memory/permGen.hpp" | |
| 31 #include "oops/constantPoolKlass.hpp" | |
| 32 #include "oops/instanceKlass.hpp" | |
| 33 #include "oops/instanceOop.hpp" | |
| 34 #include "oops/klassKlass.hpp" | |
| 35 #include "oops/klassOop.hpp" | |
| 36 #include "oops/methodKlass.hpp" | |
| 37 #include "oops/objArrayKlass.hpp" | |
| 38 #include "oops/oop.inline.hpp" | |
| 39 #include "oops/oop.inline2.hpp" | |
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40 #include "oops/symbol.hpp" |
| 1972 | 41 #include "oops/typeArrayKlass.hpp" |
| 42 #include "runtime/handles.inline.hpp" | |
| 43 #ifndef SERIALGC | |
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44 #include "gc_implementation/parNew/parOopClosures.inline.hpp" |
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45 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
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46 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
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47 #include "memory/cardTableRS.hpp" |
| 1972 | 48 #include "oops/oop.pcgc.inline.hpp" |
| 49 #endif | |
| 0 | 50 |
| 51 int klassKlass::oop_size(oop obj) const { | |
| 52 assert (obj->is_klass(), "must be a klassOop"); | |
| 53 return klassOop(obj)->klass_part()->klass_oop_size(); | |
| 54 } | |
| 55 | |
| 56 klassOop klassKlass::create_klass(TRAPS) { | |
| 57 KlassHandle h_this_klass; | |
| 58 klassKlass o; | |
| 59 // for bootstrapping, handles may not be available yet. | |
| 60 klassOop k = base_create_klass_oop(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL); | |
| 61 k->set_klass(k); // point to thyself | |
| 62 // Do not try to allocate mirror, java.lang.Class not loaded at this point. | |
| 63 // See Universe::fixup_mirrors() | |
| 64 return k; | |
| 65 } | |
| 66 | |
| 67 void klassKlass::oop_follow_contents(oop obj) { | |
| 68 Klass* k = Klass::cast(klassOop(obj)); | |
| 69 // If we are alive it is valid to keep our superclass and subtype caches alive | |
| 70 MarkSweep::mark_and_push(k->adr_super()); | |
| 71 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 72 MarkSweep::mark_and_push(k->adr_primary_supers()+i); | |
| 73 MarkSweep::mark_and_push(k->adr_secondary_super_cache()); | |
| 74 MarkSweep::mark_and_push(k->adr_secondary_supers()); | |
| 75 MarkSweep::mark_and_push(k->adr_java_mirror()); | |
| 76 // We follow the subklass and sibling links at the end of the | |
| 77 // marking phase, since otherwise following them will prevent | |
| 78 // class unloading (all classes are transitively linked from | |
| 79 // java.lang.Object). | |
| 80 MarkSweep::revisit_weak_klass_link(k); | |
| 81 obj->follow_header(); | |
| 82 } | |
| 83 | |
| 84 #ifndef SERIALGC | |
| 85 void klassKlass::oop_follow_contents(ParCompactionManager* cm, | |
| 86 oop obj) { | |
| 87 Klass* k = Klass::cast(klassOop(obj)); | |
| 88 // If we are alive it is valid to keep our superclass and subtype caches alive | |
| 89 PSParallelCompact::mark_and_push(cm, k->adr_super()); | |
| 90 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 91 PSParallelCompact::mark_and_push(cm, k->adr_primary_supers()+i); | |
| 92 PSParallelCompact::mark_and_push(cm, k->adr_secondary_super_cache()); | |
| 93 PSParallelCompact::mark_and_push(cm, k->adr_secondary_supers()); | |
| 94 PSParallelCompact::mark_and_push(cm, k->adr_java_mirror()); | |
| 95 // We follow the subklass and sibling links at the end of the | |
| 96 // marking phase, since otherwise following them will prevent | |
| 97 // class unloading (all classes are transitively linked from | |
| 98 // java.lang.Object). | |
| 99 PSParallelCompact::revisit_weak_klass_link(cm, k); | |
| 100 obj->follow_header(cm); | |
| 101 } | |
| 102 #endif // SERIALGC | |
| 103 | |
| 104 int klassKlass::oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 105 // Get size before changing pointers | |
| 106 int size = oop_size(obj); | |
| 107 Klass* k = Klass::cast(klassOop(obj)); | |
| 108 blk->do_oop(k->adr_super()); | |
| 109 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 110 blk->do_oop(k->adr_primary_supers()+i); | |
| 111 blk->do_oop(k->adr_secondary_super_cache()); | |
| 112 blk->do_oop(k->adr_secondary_supers()); | |
| 113 blk->do_oop(k->adr_java_mirror()); | |
| 114 // The following are in the perm gen and are treated | |
| 115 // specially in a later phase of a perm gen collection; ... | |
| 116 assert(oop(k)->is_perm(), "should be in perm"); | |
| 117 assert(oop(k->subklass())->is_perm_or_null(), "should be in perm"); | |
| 118 assert(oop(k->next_sibling())->is_perm_or_null(), "should be in perm"); | |
| 119 // ... don't scan them normally, but remember this klassKlass | |
| 120 // for later (see, for instance, oop_follow_contents above | |
| 121 // for what MarkSweep does with it. | |
| 122 if (blk->should_remember_klasses()) { | |
| 123 blk->remember_klass(k); | |
| 124 } | |
| 125 obj->oop_iterate_header(blk); | |
| 126 return size; | |
| 127 } | |
| 128 | |
| 129 | |
| 130 int klassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 131 // Get size before changing pointers | |
| 132 int size = oop_size(obj); | |
| 133 Klass* k = Klass::cast(klassOop(obj)); | |
| 134 oop* adr; | |
| 135 adr = k->adr_super(); | |
| 136 if (mr.contains(adr)) blk->do_oop(adr); | |
| 137 for (juint i = 0; i < Klass::primary_super_limit(); i++) { | |
| 138 adr = k->adr_primary_supers()+i; | |
| 139 if (mr.contains(adr)) blk->do_oop(adr); | |
| 140 } | |
| 141 adr = k->adr_secondary_super_cache(); | |
| 142 if (mr.contains(adr)) blk->do_oop(adr); | |
| 143 adr = k->adr_secondary_supers(); | |
| 144 if (mr.contains(adr)) blk->do_oop(adr); | |
| 145 adr = k->adr_java_mirror(); | |
| 146 if (mr.contains(adr)) blk->do_oop(adr); | |
| 147 // The following are "weak links" in the perm gen and are | |
| 148 // treated specially in a later phase of a perm gen collection. | |
| 149 assert(oop(k)->is_perm(), "should be in perm"); | |
| 150 assert(oop(k->adr_subklass())->is_perm(), "should be in perm"); | |
| 151 assert(oop(k->adr_next_sibling())->is_perm(), "should be in perm"); | |
| 152 if (blk->should_remember_klasses() | |
| 153 && (mr.contains(k->adr_subklass()) | |
| 154 || mr.contains(k->adr_next_sibling()))) { | |
| 155 blk->remember_klass(k); | |
| 156 } | |
| 157 obj->oop_iterate_header(blk, mr); | |
| 158 return size; | |
| 159 } | |
| 160 | |
| 161 | |
| 162 int klassKlass::oop_adjust_pointers(oop obj) { | |
| 163 // Get size before changing pointers | |
| 164 int size = oop_size(obj); | |
| 165 obj->adjust_header(); | |
| 166 | |
| 167 Klass* k = Klass::cast(klassOop(obj)); | |
| 168 | |
| 169 MarkSweep::adjust_pointer(k->adr_super()); | |
| 170 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 171 MarkSweep::adjust_pointer(k->adr_primary_supers()+i); | |
| 172 MarkSweep::adjust_pointer(k->adr_secondary_super_cache()); | |
| 173 MarkSweep::adjust_pointer(k->adr_secondary_supers()); | |
| 174 MarkSweep::adjust_pointer(k->adr_java_mirror()); | |
| 175 MarkSweep::adjust_pointer(k->adr_subklass()); | |
| 176 MarkSweep::adjust_pointer(k->adr_next_sibling()); | |
| 177 return size; | |
| 178 } | |
| 179 | |
| 180 #ifndef SERIALGC | |
| 181 void klassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
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182 Klass* k = Klass::cast(klassOop(obj)); |
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183 |
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184 oop* p = k->adr_java_mirror(); |
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185 if (PSScavenge::should_scavenge(p)) { |
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186 pm->claim_or_forward_depth(p); |
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187 } |
| 0 | 188 } |
| 189 | |
| 190 int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
| 191 Klass* k = Klass::cast(klassOop(obj)); | |
| 192 | |
| 193 oop* const beg_oop = k->oop_block_beg(); | |
| 194 oop* const end_oop = k->oop_block_end(); | |
| 195 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) { | |
| 196 PSParallelCompact::adjust_pointer(cur_oop); | |
| 197 } | |
| 198 | |
| 199 return oop_size(obj); | |
| 200 } | |
| 201 #endif // SERIALGC | |
| 202 | |
| 203 | |
| 204 // Printing | |
| 205 | |
| 206 void klassKlass::oop_print_on(oop obj, outputStream* st) { | |
| 207 Klass::oop_print_on(obj, st); | |
| 208 } | |
| 209 | |
| 210 void klassKlass::oop_print_value_on(oop obj, outputStream* st) { | |
| 211 Klass::oop_print_value_on(obj, st); | |
| 212 } | |
| 213 | |
| 214 const char* klassKlass::internal_name() const { | |
| 215 return "{other class}"; | |
| 216 } | |
| 217 | |
| 218 | |
| 219 // Verification | |
| 220 | |
| 221 void klassKlass::oop_verify_on(oop obj, outputStream* st) { | |
| 222 Klass::oop_verify_on(obj, st); | |
| 223 guarantee(obj->is_perm(), "should be in permspace"); | |
| 224 guarantee(obj->is_klass(), "should be klass"); | |
| 225 | |
| 226 Klass* k = Klass::cast(klassOop(obj)); | |
| 227 if (k->super() != NULL) { | |
| 228 guarantee(k->super()->is_perm(), "should be in permspace"); | |
| 229 guarantee(k->super()->is_klass(), "should be klass"); | |
| 230 } | |
| 231 klassOop ko = k->secondary_super_cache(); | |
| 232 if( ko != NULL ) { | |
| 233 guarantee(ko->is_perm(), "should be in permspace"); | |
| 234 guarantee(ko->is_klass(), "should be klass"); | |
| 235 } | |
| 236 for( uint i = 0; i < primary_super_limit(); i++ ) { | |
| 237 oop ko = k->adr_primary_supers()[i]; // Cannot use normal accessor because it asserts | |
| 238 if( ko != NULL ) { | |
| 239 guarantee(ko->is_perm(), "should be in permspace"); | |
| 240 guarantee(ko->is_klass(), "should be klass"); | |
| 241 } | |
| 242 } | |
| 243 | |
| 244 if (k->java_mirror() != NULL || (k->oop_is_instance() && instanceKlass::cast(klassOop(obj))->is_loaded())) { | |
| 245 guarantee(k->java_mirror() != NULL, "should be allocated"); | |
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246 guarantee(k->java_mirror()->is_perm() || !JavaObjectsInPerm, "should be in permspace"); |
| 0 | 247 guarantee(k->java_mirror()->is_instance(), "should be instance"); |
| 248 } | |
| 249 } |