Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1MarkSweep.hpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 05 Mar 2013 15:36:56 -0800 |
| parents | f95d63e2154a |
| children | f2110083203d |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP | |
| 27 | |
| 28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 29 #include "gc_implementation/g1/heapRegion.hpp" | |
| 30 #include "memory/genMarkSweep.hpp" | |
| 31 #include "memory/generation.hpp" | |
| 32 #include "memory/universe.hpp" | |
| 33 #include "oops/markOop.hpp" | |
| 34 #include "oops/oop.hpp" | |
| 35 #include "runtime/timer.hpp" | |
| 36 #include "utilities/growableArray.hpp" | |
| 37 | |
| 342 | 38 class ReferenceProcessor; |
| 39 | |
| 40 // G1MarkSweep takes care of global mark-compact garbage collection for a | |
| 41 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All | |
| 42 // generations are assumed to support marking; those that can also support | |
| 43 // compaction. | |
| 44 // | |
| 45 // Class unloading will only occur when a full gc is invoked. | |
| 46 | |
| 47 | |
| 48 class G1MarkSweep : AllStatic { | |
| 49 friend class VM_G1MarkSweep; | |
| 50 friend class Scavenge; | |
| 51 | |
| 52 public: | |
| 53 | |
| 54 static void invoke_at_safepoint(ReferenceProcessor* rp, | |
| 55 bool clear_all_softrefs); | |
| 56 | |
| 57 private: | |
| 58 | |
| 59 // Mark live objects | |
| 60 static void mark_sweep_phase1(bool& marked_for_deopt, | |
| 61 bool clear_all_softrefs); | |
| 62 // Calculate new addresses | |
| 63 static void mark_sweep_phase2(); | |
| 64 // Update pointers | |
| 65 static void mark_sweep_phase3(); | |
| 66 // Move objects to new positions | |
| 67 static void mark_sweep_phase4(); | |
| 68 | |
| 69 static void allocate_stacks(); | |
| 70 }; | |
| 1972 | 71 |
| 72 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |