Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/memory/genRemSet.cpp
src/share/vm/memory/genRemSet.cpp
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f90c822e73f8 |
|---|---|
| 1 /* | |
| 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. | |
| 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 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "classfile/classLoaderData.hpp" | |
| 27 #include "memory/cardTableRS.hpp" | |
| 28 #include "memory/genRemSet.hpp" | |
| 29 | |
| 30 // This kind of "BarrierSet" allows a "CollectedHeap" to detect and | |
| 31 // enumerate ref fields that have been modified (since the last | |
| 32 // enumeration.) | |
| 33 | |
| 34 uintx GenRemSet::max_alignment_constraint(Name nm) { | |
| 35 assert(nm == GenRemSet::CardTable, "Unrecognized GenRemSet type."); | |
| 36 return CardTableRS::ct_max_alignment_constraint(); | |
| 37 } | |
| 38 | |
| 39 class HasAccumulatedModifiedOopsClosure : public KlassClosure { | |
| 40 bool _found; | |
| 41 public: | |
| 42 HasAccumulatedModifiedOopsClosure() : _found(false) {} | |
| 43 void do_klass(Klass* klass) { | |
| 44 if (_found) { | |
| 45 return; | |
| 46 } | |
| 47 | |
| 48 if (klass->has_accumulated_modified_oops()) { | |
| 49 _found = true; | |
| 50 } | |
| 51 } | |
| 52 bool found() { | |
| 53 return _found; | |
| 54 } | |
| 55 }; | |
| 56 | |
| 57 bool KlassRemSet::mod_union_is_clear() { | |
| 58 HasAccumulatedModifiedOopsClosure closure; | |
| 59 ClassLoaderDataGraph::classes_do(&closure); | |
| 60 | |
| 61 return !closure.found(); | |
| 62 } | |
| 63 | |
| 64 | |
| 65 class ClearKlassModUnionClosure : public KlassClosure { | |
| 66 public: | |
| 67 void do_klass(Klass* klass) { | |
| 68 if (klass->has_accumulated_modified_oops()) { | |
| 69 klass->clear_accumulated_modified_oops(); | |
| 70 } | |
| 71 } | |
| 72 }; | |
| 73 | |
| 74 void KlassRemSet::clear_mod_union() { | |
| 75 ClearKlassModUnionClosure closure; | |
| 76 ClassLoaderDataGraph::classes_do(&closure); | |
| 77 } |
