truffle: src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp annotate

annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 20804:7848fc12602b

Merge with jdk8u40-b25

author	Gilles Duboscq <gilles.m.duboscq@oracle.com>
date	Tue, 07 Apr 2015 14:58:49 +0200
parents	52b4284cb496 ee10217e3d03
children	d3cec14f33f3

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
17753 191174b49bec 8035406: Improve data structure for Code Cache remembered sets tschatzl parents: 17736 diff changeset	2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1394 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	27
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	28 #include "gc_implementation/g1/g1AllocationContext.hpp"
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	29 #include "gc_implementation/g1/g1Allocator.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	30 #include "gc_implementation/g1/concurrentMark.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	31 #include "gc_implementation/g1/evacuationInfo.hpp"
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	32 #include "gc_implementation/g1/g1AllocRegion.hpp"
20212 d7e2d5f2846b 8027553: Change the in_cset_fast_test functionality to use the G1BiasedArray abstraction tschatzl parents: 20197 diff changeset	33 #include "gc_implementation/g1/g1BiasedArray.hpp"
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	34 #include "gc_implementation/g1/g1HRPrinter.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	35 #include "gc_implementation/g1/g1MonitoringSupport.hpp"
12343 d55c004e1d4d 8025305: Cleanup CardTableModRefBS usage in G1 mgerdin parents: 12233 diff changeset	36 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	37 #include "gc_implementation/g1/g1YCTypes.hpp"
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	38 #include "gc_implementation/g1/heapRegionManager.hpp"
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	39 #include "gc_implementation/g1/heapRegionSet.hpp"
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	40 #include "gc_implementation/shared/hSpaceCounters.hpp"
6595 aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	41 #include "gc_implementation/shared/parGCAllocBuffer.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	42 #include "memory/barrierSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	43 #include "memory/memRegion.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	44 #include "memory/sharedHeap.hpp"
8038 ad747ee9d0b1 8002144: G1: large number of evacuation failures may lead to large c heap memory usage brutisso parents: 6819 diff changeset	45 #include "utilities/stack.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	46
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	47 // A "G1CollectedHeap" is an implementation of a java heap for HotSpot.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	48 // It uses the "Garbage First" heap organization and algorithm, which
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	49 // may combine concurrent marking with parallel, incremental compaction of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	50 // heap subsets that will yield large amounts of garbage.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	52 // Forward declarations
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	53 class HeapRegion;
2173 97ba643ea3ed 7014261: G1: RSet-related failures tonyp parents: 2152 diff changeset	54 class HRRSCleanupTask;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	55 class GenerationSpec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	56 class OopsInHeapRegionClosure;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	57 class G1KlassScanClosure;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	58 class G1ScanHeapEvacClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	59 class ObjectClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	60 class SpaceClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	61 class CompactibleSpaceClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	62 class Space;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	63 class G1CollectorPolicy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64 class GenRemSet;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	65 class G1RemSet;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	66 class HeapRegionRemSetIterator;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	67 class ConcurrentMark;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	68 class ConcurrentMarkThread;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	69 class ConcurrentG1Refine;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	70 class ConcurrentGCTimer;
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	71 class GenerationCounters;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	72 class STWGCTimer;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	73 class G1NewTracer;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	74 class G1OldTracer;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	75 class EvacuationFailedInfo;
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	76 class nmethod;
13400 86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data mgronlun parents: 12352 diff changeset	77 class Ticks;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6120 diff changeset	79 typedef OverflowTaskQueue<StarTask, mtGC> RefToScanQueue;
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6120 diff changeset	80 typedef GenericTaskQueueSet<RefToScanQueue, mtGC> RefToScanQueueSet;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	81
807 d44bdab1c03d 6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55 johnc parents: 796 diff changeset	82 typedef int RegionIdx_t; // needs to hold [ 0..max_regions() )
d44bdab1c03d 6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55 johnc parents: 796 diff changeset	83 typedef int CardIdx_t; // needs to hold [ 0..CardsPerRegion )
d44bdab1c03d 6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55 johnc parents: 796 diff changeset	84
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6120 diff changeset	85 class YoungList : public CHeapObj<mtGC> {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	86 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	87 G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	88
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	89 HeapRegion* _head;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	91 HeapRegion* _survivor_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	92 HeapRegion* _survivor_tail;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	93
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	94 HeapRegion* _curr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	95
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	96 uint _length;
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	97 uint _survivor_length;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	98
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	99 size_t _last_sampled_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	100 size_t _sampled_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	101
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	102 void empty_list(HeapRegion* list);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	103
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	104 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	105 YoungList(G1CollectedHeap* g1h);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	106
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	107 void push_region(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	108 void add_survivor_region(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	109
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	110 void empty_list();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	111 bool is_empty() { return _length == 0; }
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	112 uint length() { return _length; }
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	113 uint survivor_length() { return _survivor_length; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	114
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	115 // Currently we do not keep track of the used byte sum for the
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	116 // young list and the survivors and it'd be quite a lot of work to
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	117 // do so. When we'll eventually replace the young list with
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	118 // instances of HeapRegionLinkedList we'll get that for free. So,
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	119 // we'll report the more accurate information then.
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	120 size_t eden_used_bytes() {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	121 assert(length() >= survivor_length(), "invariant");
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	122 return (size_t) (length() - survivor_length()) * HeapRegion::GrainBytes;
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	123 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	124 size_t survivor_used_bytes() {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	125 return (size_t) survivor_length() * HeapRegion::GrainBytes;
3764 053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	126 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions tonyp parents: 3377 diff changeset	127
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	128 void rs_length_sampling_init();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	129 bool rs_length_sampling_more();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	130 void rs_length_sampling_next();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	131
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	132 void reset_sampled_info() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	133 _last_sampled_rs_lengths = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	134 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	135 size_t sampled_rs_lengths() { return _last_sampled_rs_lengths; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	136
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	137 // for development purposes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	138 void reset_auxilary_lists();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	139 void clear() { _head = NULL; _length = 0; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	140
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	141 void clear_survivors() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	142 _survivor_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	143 _survivor_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	144 _survivor_length = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	145 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	146
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 HeapRegion* first_region() { return _head; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148 HeapRegion* first_survivor_region() { return _survivor_head; }
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	149 HeapRegion* last_survivor_region() { return _survivor_tail; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	150
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	151 // debugging
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	152 bool check_list_well_formed();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	153 bool check_list_empty(bool check_sample = true);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	154 void print();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	155 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	157 // The G1 STW is alive closure.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	158 // An instance is embedded into the G1CH and used as the
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	159 // (optional) _is_alive_non_header closure in the STW
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	160 // reference processor. It is also extensively used during
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	161 // reference processing during STW evacuation pauses.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	162 class G1STWIsAliveClosure: public BoolObjectClosure {
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	163 G1CollectedHeap* _g1;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	164 public:
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	165 G1STWIsAliveClosure(G1CollectedHeap* g1) : _g1(g1) {}
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	166 bool do_object_b(oop p);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	167 };
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	168
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169 class RefineCardTableEntryClosure;
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	170
20337 1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	171 class G1RegionMappingChangedListener : public G1MappingChangedListener {
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	172 private:
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	173 void reset_from_card_cache(uint start_idx, size_t num_regions);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	174 public:
20543 e7d0505c8a30 8059758: Footprint regressions with JDK-8038423 tschatzl parents: 20494 diff changeset	175 virtual void on_commit(uint start_idx, size_t num_regions, bool zero_filled);
20337 1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	176 };
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	177
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	178 class G1CollectedHeap : public SharedHeap {
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	179 friend class VM_CollectForMetadataAllocation;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	180 friend class VM_G1CollectForAllocation;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	181 friend class VM_G1CollectFull;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	182 friend class VM_G1IncCollectionPause;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	183 friend class VMStructs;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	184 friend class MutatorAllocRegion;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	185 friend class SurvivorGCAllocRegion;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	186 friend class OldGCAllocRegion;
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	187 friend class G1Allocator;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	188 friend class G1DefaultAllocator;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	189 friend class G1ResManAllocator;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	190
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	191 // Closures used in implementation.
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	192 template <G1Barrier barrier, G1Mark do_mark_object>
5987 748051fd24ce 7130974: G1: Remove G1ParCopyHelper brutisso parents: 4912 diff changeset	193 friend class G1ParCopyClosure;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	194 friend class G1IsAliveClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	195 friend class G1EvacuateFollowersClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	196 friend class G1ParScanThreadState;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	197 friend class G1ParScanClosureSuper;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	198 friend class G1ParEvacuateFollowersClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	199 friend class G1ParTask;
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	200 friend class G1ParGCAllocator;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	201 friend class G1DefaultParGCAllocator;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	202 friend class G1FreeGarbageRegionClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	203 friend class RefineCardTableEntryClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	204 friend class G1PrepareCompactClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	205 friend class RegionSorter;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	206 friend class RegionResetter;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	207 friend class CountRCClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 friend class EvacPopObjClosure;
796 29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	209 friend class G1ParCleanupCTTask;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	210
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	211 friend class G1FreeHumongousRegionClosure;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	212 // Other related classes.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	213 friend class G1MarkSweep;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	214
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	215 private:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	216 // The one and only G1CollectedHeap, so static functions can find it.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	217 static G1CollectedHeap* _g1h;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	218
942 2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 941 diff changeset	219 static size_t _humongous_object_threshold_in_words;
2c79770d1f6e 6819085: G1: use larger and/or user settable region size tonyp parents: 941 diff changeset	220
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	221 // The secondary free list which contains regions that have been
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	222 // freed up during the cleanup process. This will be appended to
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	223 // the master free list when appropriate.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	224 FreeRegionList _secondary_free_list;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	225
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	226 // It keeps track of the old regions.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	227 HeapRegionSet _old_set;
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	228
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	229 // It keeps track of the humongous regions.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	230 HeapRegionSet _humongous_set;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	231
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	232 void clear_humongous_is_live_table();
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	233 void eagerly_reclaim_humongous_regions();
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	234
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	235 // The number of regions we could create by expansion.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	236 uint _expansion_regions;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	237
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	238 // The block offset table for the G1 heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	239 G1BlockOffsetSharedArray* _bot_shared;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	240
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	241 // Tears down the region sets / lists so that they are empty and the
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	242 // regions on the heap do not belong to a region set / list. The
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	243 // only exception is the humongous set which we leave unaltered. If
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	244 // free_list_only is true, it will only tear down the master free
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	245 // list. It is called before a Full GC (free_list_only == false) or
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	246 // before heap shrinking (free_list_only == true).
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	247 void tear_down_region_sets(bool free_list_only);
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	248
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	249 // Rebuilds the region sets / lists so that they are repopulated to
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	250 // reflect the contents of the heap. The only exception is the
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	251 // humongous set which was not torn down in the first place. If
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	252 // free_list_only is true, it will only rebuild the master free
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	253 // list. It is called after a Full GC (free_list_only == false) or
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	254 // after heap shrinking (free_list_only == true).
8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	255 void rebuild_region_sets(bool free_list_only);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	256
20337 1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	257 // Callback for region mapping changed events.
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	258 G1RegionMappingChangedListener _listener;
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	259
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	260 // The sequence of all heap regions in the heap.
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	261 HeapRegionManager _hrm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	262
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	263 // Class that handles the different kinds of allocations.
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	264 G1Allocator* _allocator;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	265
20445 e5668dcf12e9 8057818: collect allocation context statistics at gc pauses jcoomes parents: 20417 diff changeset	266 // Statistics for each allocation context
e5668dcf12e9 8057818: collect allocation context statistics at gc pauses jcoomes parents: 20417 diff changeset	267 AllocationContextStats _allocation_context_stats;
e5668dcf12e9 8057818: collect allocation context statistics at gc pauses jcoomes parents: 20417 diff changeset	268
6595 aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	269 // PLAB sizing policy for survivors.
aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	270 PLABStats _survivor_plab_stats;
aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	271
aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	272 // PLAB sizing policy for tenured objects.
aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	273 PLABStats _old_plab_stats;
aaf61e68b255 6818524: G1: use ergonomic resizing of PLABs johnc parents: 6254 diff changeset	274
4781 bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	275 // It specifies whether we should attempt to expand the heap after a
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	276 // region allocation failure. If heap expansion fails we set this to
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	277 // false so that we don't re-attempt the heap expansion (it's likely
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	278 // that subsequent expansion attempts will also fail if one fails).
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	279 // Currently, it is only consulted during GC and it's reset at the
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	280 // start of each GC.
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	281 bool _expand_heap_after_alloc_failure;
bacb651cf5bf 7113006: G1: excessive ergo output when an evac failure happens tonyp parents: 4728 diff changeset	282
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	283 // It resets the mutator alloc region before new allocations can take place.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	284 void init_mutator_alloc_region();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	285
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	286 // It releases the mutator alloc region.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	287 void release_mutator_alloc_region();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	288
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	289 // It initializes the GC alloc regions at the start of a GC.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	290 void init_gc_alloc_regions(EvacuationInfo& evacuation_info);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	292 // It releases the GC alloc regions at the end of a GC.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	293 void release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	295 // It does any cleanup that needs to be done on the GC alloc regions
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	296 // before a Full GC.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	297 void abandon_gc_alloc_regions();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	299 // Helper for monitoring and management support.
b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	300 G1MonitoringSupport* _g1mm;
b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	301
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	302 // Records whether the region at the given index is kept live by roots or
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	303 // references from the young generation.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	304 class HumongousIsLiveBiasedMappedArray : public G1BiasedMappedArray<bool> {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	305 protected:
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	306 bool default_value() const { return false; }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	307 public:
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	308 void clear() { G1BiasedMappedArray<bool>::clear(); }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	309 void set_live(uint region) {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	310 set_by_index(region, true);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	311 }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	312 bool is_live(uint region) {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	313 return get_by_index(region);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	314 }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	315 };
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	316
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	317 HumongousIsLiveBiasedMappedArray _humongous_is_live;
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	318 // Stores whether during humongous object registration we found candidate regions.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	319 // If not, we can skip a few steps.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	320 bool _has_humongous_reclaim_candidates;
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	321
353 9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	322 volatile unsigned _gc_time_stamp;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324 size_t* _surviving_young_words;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	325
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	326 G1HRPrinter _hr_printer;
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	327
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328 void setup_surviving_young_words();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	329 void update_surviving_young_words(size_t* surv_young_words);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	330 void cleanup_surviving_young_words();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	332 // It decides whether an explicit GC should start a concurrent cycle
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	333 // instead of doing a STW GC. Currently, a concurrent cycle is
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	334 // explicitly started if:
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	335 // (a) cause == _gc_locker and +GCLockerInvokesConcurrent, or
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	336 // (b) cause == _java_lang_system_gc and +ExplicitGCInvokesConcurrent.
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	337 // (c) cause == _g1_humongous_allocation
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	338 bool should_do_concurrent_full_gc(GCCause::Cause cause);
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	339
6120 37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	340 // Keeps track of how many "old marking cycles" (i.e., Full GCs or
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	341 // concurrent cycles) we have started.
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	342 volatile unsigned int _old_marking_cycles_started;
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	343
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	344 // Keeps track of how many "old marking cycles" (i.e., Full GCs or
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	345 // concurrent cycles) we have completed.
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	346 volatile unsigned int _old_marking_cycles_completed;
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	347
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	348 bool _concurrent_cycle_started;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	349
3285 49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	350 // This is a non-product method that is helpful for testing. It is
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	351 // called at the end of a GC and artificially expands the heap by
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	352 // allocating a number of dead regions. This way we can induce very
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	353 // frequent marking cycles and stress the cleanup / concurrent
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	354 // cleanup code more (as all the regions that will be allocated by
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	355 // this method will be found dead by the marking cycle).
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	356 void allocate_dummy_regions() PRODUCT_RETURN;
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap tonyp parents: 2435 diff changeset	357
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	358 // Clear RSets after a compaction. It also resets the GC time stamps.
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	359 void clear_rsets_post_compaction();
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	360
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	361 // If the HR printer is active, dump the state of the regions in the
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	362 // heap after a compaction.
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	363 void print_hrm_post_compaction();
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	364
6628 bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	365 double verify(bool guard, const char* msg);
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	366 void verify_before_gc();
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	367 void verify_after_gc();
bb3f6194fedb 7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code brutisso parents: 6611 diff changeset	368
6752 9646b7ff4d14 7198130: G1: PrintReferenceGC output comes out of order brutisso parents: 6725 diff changeset	369 void log_gc_header();
9646b7ff4d14 7198130: G1: PrintReferenceGC output comes out of order brutisso parents: 6725 diff changeset	370 void log_gc_footer(double pause_time_sec);
9646b7ff4d14 7198130: G1: PrintReferenceGC output comes out of order brutisso parents: 6725 diff changeset	371
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	372 // These are macros so that, if the assert fires, we get the correct
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	373 // line number, file, etc.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	374
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	375 #define heap_locking_asserts_err_msg(_extra_message_) \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	376 err_msg("%s : Heap_lock locked: %s, at safepoint: %s, is VM thread: %s", \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	377 (_extra_message_), \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	378 BOOL_TO_STR(Heap_lock->owned_by_self()), \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	379 BOOL_TO_STR(SafepointSynchronize::is_at_safepoint()), \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	380 BOOL_TO_STR(Thread::current()->is_VM_thread()))
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	381
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	382 #define assert_heap_locked() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	383 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	384 assert(Heap_lock->owned_by_self(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	385 heap_locking_asserts_err_msg("should be holding the Heap_lock")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	386 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	387
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	388 #define assert_heap_locked_or_at_safepoint(_should_be_vm_thread_) \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	389 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	390 assert(Heap_lock->owned_by_self() \|\| \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	391 (SafepointSynchronize::is_at_safepoint() && \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	392 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread())), \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	393 heap_locking_asserts_err_msg("should be holding the Heap_lock or " \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	394 "should be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	395 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	396
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	397 #define assert_heap_locked_and_not_at_safepoint() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	398 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	399 assert(Heap_lock->owned_by_self() && \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	400 !SafepointSynchronize::is_at_safepoint(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	401 heap_locking_asserts_err_msg("should be holding the Heap_lock and " \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	402 "should not be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	403 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	404
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	405 #define assert_heap_not_locked() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	406 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	407 assert(!Heap_lock->owned_by_self(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	408 heap_locking_asserts_err_msg("should not be holding the Heap_lock")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	409 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	410
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	411 #define assert_heap_not_locked_and_not_at_safepoint() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	412 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	413 assert(!Heap_lock->owned_by_self() && \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	414 !SafepointSynchronize::is_at_safepoint(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	415 heap_locking_asserts_err_msg("should not be holding the Heap_lock and " \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	416 "should not be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	417 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	418
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	419 #define assert_at_safepoint(_should_be_vm_thread_) \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	420 do { \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	421 assert(SafepointSynchronize::is_at_safepoint() && \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	422 ((_should_be_vm_thread_) == Thread::current()->is_VM_thread()), \
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	423 heap_locking_asserts_err_msg("should be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	424 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	425
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	426 #define assert_not_at_safepoint() \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	427 do { \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	428 assert(!SafepointSynchronize::is_at_safepoint(), \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	429 heap_locking_asserts_err_msg("should not be at a safepoint")); \
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	430 } while (0)
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	431
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	432 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	433
3823 14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark johnc parents: 3778 diff changeset	434 // The young region list.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	435 YoungList* _young_list;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	436
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	437 // The current policy object for the collector.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	438 G1CollectorPolicy* _g1_policy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	439
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	440 // This is the second level of trying to allocate a new region. If
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	441 // new_region() didn't find a region on the free_list, this call will
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	442 // check whether there's anything available on the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	443 // secondary_free_list and/or wait for more regions to appear on
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	444 // that list, if _free_regions_coming is set.
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17759 diff changeset	445 HeapRegion* new_region_try_secondary_free_list(bool is_old);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	446
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	447 // Try to allocate a single non-humongous HeapRegion sufficient for
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	448 // an allocation of the given word_size. If do_expand is true,
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	449 // attempt to expand the heap if necessary to satisfy the allocation
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17759 diff changeset	450 // request. If the region is to be used as an old region or for a
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17759 diff changeset	451 // humongous object, set is_old to true. If not, to false.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17759 diff changeset	452 HeapRegion* new_region(size_t word_size, bool is_old, bool do_expand);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	453
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	454 // Initialize a contiguous set of free regions of length num_regions
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	455 // and starting at index first so that they appear as a single
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	456 // humongous region.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	457 HeapWord* humongous_obj_allocate_initialize_regions(uint first,
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	458 uint num_regions,
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	459 size_t word_size,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	460 AllocationContext_t context);
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	461
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	462 // Attempt to allocate a humongous object of the given size. Return
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	463 // NULL if unsuccessful.
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	464 HeapWord* humongous_obj_allocate(size_t word_size, AllocationContext_t context);
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	465
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	466 // The following two methods, allocate_new_tlab() and
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	467 // mem_allocate(), are the two main entry points from the runtime
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	468 // into the G1's allocation routines. They have the following
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	469 // assumptions:
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	470 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	471 // * They should both be called outside safepoints.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	472 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	473 // * They should both be called without holding the Heap_lock.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	474 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	475 // * All allocation requests for new TLABs should go to
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	476 // allocate_new_tlab().
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	477 //
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	478 // * All non-TLAB allocation requests should go to mem_allocate().
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	479 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	480 // * If either call cannot satisfy the allocation request using the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	481 // current allocating region, they will try to get a new one. If
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	482 // this fails, they will attempt to do an evacuation pause and
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	483 // retry the allocation.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	484 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	485 // * If all allocation attempts fail, even after trying to schedule
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	486 // an evacuation pause, allocate_new_tlab() will return NULL,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	487 // whereas mem_allocate() will attempt a heap expansion and/or
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	488 // schedule a Full GC.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	489 //
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	490 // * We do not allow humongous-sized TLABs. So, allocate_new_tlab
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	491 // should never be called with word_size being humongous. All
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	492 // humongous allocation requests should go to mem_allocate() which
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	493 // will satisfy them with a special path.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	494
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	495 virtual HeapWord* allocate_new_tlab(size_t word_size);
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	496
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	497 virtual HeapWord* mem_allocate(size_t word_size,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	498 bool* gc_overhead_limit_was_exceeded);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	499
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	500 // The following three methods take a gc_count_before_ret
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	501 // parameter which is used to return the GC count if the method
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	502 // returns NULL. Given that we are required to read the GC count
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	503 // while holding the Heap_lock, and these paths will take the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	504 // Heap_lock at some point, it's easier to get them to read the GC
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	505 // count while holding the Heap_lock before they return NULL instead
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	506 // of the caller (namely: mem_allocate()) having to also take the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	507 // Heap_lock just to read the GC count.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	508
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	509 // First-level mutator allocation attempt: try to allocate out of
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	510 // the mutator alloc region without taking the Heap_lock. This
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	511 // should only be used for non-humongous allocations.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	512 inline HeapWord* attempt_allocation(size_t word_size,
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8038 diff changeset	513 unsigned int* gc_count_before_ret,
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8038 diff changeset	514 int* gclocker_retry_count_ret);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	515
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	516 // Second-level mutator allocation attempt: take the Heap_lock and
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	517 // retry the allocation attempt, potentially scheduling a GC
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	518 // pause. This should only be used for non-humongous allocations.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	519 HeapWord* attempt_allocation_slow(size_t word_size,
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	520 AllocationContext_t context,
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8038 diff changeset	521 unsigned int* gc_count_before_ret,
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8038 diff changeset	522 int* gclocker_retry_count_ret);
2134 b158bed62ef5 6994297: G1: do first-level slow-path allocations with a CAS tonyp parents: 2133 diff changeset	523
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	524 // Takes the Heap_lock and attempts a humongous allocation. It can
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	525 // potentially schedule a GC pause.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	526 HeapWord* attempt_allocation_humongous(size_t word_size,
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8038 diff changeset	527 unsigned int* gc_count_before_ret,
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8038 diff changeset	528 int* gclocker_retry_count_ret);
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	529
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	530 // Allocation attempt that should be called during safepoints (e.g.,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	531 // at the end of a successful GC). expect_null_mutator_alloc_region
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	532 // specifies whether the mutator alloc region is expected to be NULL
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	533 // or not.
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	534 HeapWord* attempt_allocation_at_safepoint(size_t word_size,
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	535 AllocationContext_t context,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	536 bool expect_null_mutator_alloc_region);
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	537
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	538 // It dirties the cards that cover the block so that so that the post
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	539 // write barrier never queues anything when updating objects on this
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	540 // block. It is assumed (and in fact we assert) that the block
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	541 // belongs to a young region.
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	542 inline void dirty_young_block(HeapWord* start, size_t word_size);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	543
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	544 // Allocate blocks during garbage collection. Will ensure an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	545 // allocation region, either by picking one or expanding the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	546 // heap, and then allocate a block of the given size. The block
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	547 // may not be a humongous - it must fit into a single heap region.
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	548 HeapWord* par_allocate_during_gc(GCAllocPurpose purpose,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	549 size_t word_size,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	550 AllocationContext_t context);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	551
17690 e5c0b296deb2 8034948: Back out JDK-6976350 since it does not fix any issue tschatzl parents: 17689 diff changeset	552 HeapWord* allocate_during_gc_slow(GCAllocPurpose purpose,
e5c0b296deb2 8034948: Back out JDK-6976350 since it does not fix any issue tschatzl parents: 17689 diff changeset	553 HeapRegion* alloc_region,
e5c0b296deb2 8034948: Back out JDK-6976350 since it does not fix any issue tschatzl parents: 17689 diff changeset	554 bool par,
e5c0b296deb2 8034948: Back out JDK-6976350 since it does not fix any issue tschatzl parents: 17689 diff changeset	555 size_t word_size);
e5c0b296deb2 8034948: Back out JDK-6976350 since it does not fix any issue tschatzl parents: 17689 diff changeset	556
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	557 // Ensure that no further allocations can happen in "r", bearing in mind
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	558 // that parallel threads might be attempting allocations.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	559 void par_allocate_remaining_space(HeapRegion* r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	560
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	561 // Allocation attempt during GC for a survivor object / PLAB.
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	562 inline HeapWord* survivor_attempt_allocation(size_t word_size,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	563 AllocationContext_t context);
545 58054a18d735 6484959: G1: introduce survivor spaces apetrusenko parents: 526 diff changeset	564
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	565 // Allocation attempt during GC for an old object / PLAB.
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	566 inline HeapWord* old_attempt_allocation(size_t word_size,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	567 AllocationContext_t context);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	568
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	569 // These methods are the "callbacks" from the G1AllocRegion class.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	570
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	571 // For mutator alloc regions.
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	572 HeapRegion* new_mutator_alloc_region(size_t word_size, bool force);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	573 void retire_mutator_alloc_region(HeapRegion* alloc_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	574 size_t allocated_bytes);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	575
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	576 // For GC alloc regions.
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 6008 diff changeset	577 HeapRegion* new_gc_alloc_region(size_t word_size, uint count,
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	578 GCAllocPurpose ap);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	579 void retire_gc_alloc_region(HeapRegion* alloc_region,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	580 size_t allocated_bytes, GCAllocPurpose ap);
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 3823 diff changeset	581
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	582 // - if explicit_gc is true, the GC is for a System.gc() or a heap
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	583 // inspection request and should collect the entire heap
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	584 // - if clear_all_soft_refs is true, all soft references should be
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	585 // cleared during the GC
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	586 // - if explicit_gc is false, word_size describes the allocation that
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	587 // the GC should attempt (at least) to satisfy
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	588 // - it returns false if it is unable to do the collection due to the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	589 // GC locker being active, true otherwise
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	590 bool do_collection(bool explicit_gc,
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	591 bool clear_all_soft_refs,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	592 size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	593
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	594 // Callback from VM_G1CollectFull operation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	595 // Perform a full collection.
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	596 virtual void do_full_collection(bool clear_all_soft_refs);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	597
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	598 // Resize the heap if necessary after a full collection. If this is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	599 // after a collect-for allocation, "word_size" is the allocation size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	600 // and will be considered part of the used portion of the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	601 void resize_if_necessary_after_full_collection(size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	602
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	603 // Callback from VM_G1CollectForAllocation operation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	604 // This function does everything necessary/possible to satisfy a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	605 // failed allocation request (including collection, expansion, etc.)
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	606 HeapWord* satisfy_failed_allocation(size_t word_size,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	607 AllocationContext_t context,
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	608 bool* succeeded);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	609
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	610 // Attempting to expand the heap sufficiently
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	611 // to support an allocation of the given "word_size". If
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	612 // successful, perform the allocation and return the address of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	613 // allocated block, or else "NULL".
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	614 HeapWord* expand_and_allocate(size_t word_size, AllocationContext_t context);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	615
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	616 // Process any reference objects discovered during
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	617 // an incremental evacuation pause.
6819 2e6857353b2c 8000311: G1: ParallelGCThreads==0 broken johnc parents: 6756 diff changeset	618 void process_discovered_references(uint no_of_gc_workers);
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	619
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	620 // Enqueue any remaining discovered references
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	621 // after processing.
6819 2e6857353b2c 8000311: G1: ParallelGCThreads==0 broken johnc parents: 6756 diff changeset	622 void enqueue_discovered_references(uint no_of_gc_workers);
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	623
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	624 public:
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	625
20417 d35872270666 8057658: Enable G1 FullGC extensions sjohanss parents: 20404 diff changeset	626 G1Allocator* allocator() {
d35872270666 8057658: Enable G1 FullGC extensions sjohanss parents: 20404 diff changeset	627 return _allocator;
d35872270666 8057658: Enable G1 FullGC extensions sjohanss parents: 20404 diff changeset	628 }
d35872270666 8057658: Enable G1 FullGC extensions sjohanss parents: 20404 diff changeset	629
3980 8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	630 G1MonitoringSupport* g1mm() {
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	631 assert(_g1mm != NULL, "should have been initialized");
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	632 return _g1mm;
8229bd737950 7075646: G1: fix inconsistencies in the monitoring data tonyp parents: 3979 diff changeset	633 }
3289 b52782ae3880 6946417: G1: Java VisualVM does not support G1 properly. jmasa parents: 3285 diff changeset	634
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	635 // Expand the garbage-first heap by at least the given size (in bytes!).
2188 c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2173 diff changeset	636 // Returns true if the heap was expanded by the requested amount;
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2173 diff changeset	637 // false otherwise.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	638 // (Rounds up to a HeapRegion boundary.)
2188 c33825b68624 6923430: G1: assert(res != 0,"This should have worked.") johnc parents: 2173 diff changeset	639 bool expand(size_t expand_bytes);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	640
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	641 // Returns the PLAB statistics given a purpose.
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	642 PLABStats* stats_for_purpose(GCAllocPurpose purpose) {
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	643 PLABStats* stats = NULL;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	644
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	645 switch (purpose) {
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	646 case GCAllocForSurvived:
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	647 stats = &_survivor_plab_stats;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	648 break;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	649 case GCAllocForTenured:
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	650 stats = &_old_plab_stats;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	651 break;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	652 default:
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	653 assert(false, "unrecognized GCAllocPurpose");
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	654 }
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	655
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	656 return stats;
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	657 }
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	658
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	659 // Determines PLAB size for a particular allocation purpose.
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	660 size_t desired_plab_sz(GCAllocPurpose purpose);
227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	661
20445 e5668dcf12e9 8057818: collect allocation context statistics at gc pauses jcoomes parents: 20417 diff changeset	662 inline AllocationContextStats& allocation_context_stats();
e5668dcf12e9 8057818: collect allocation context statistics at gc pauses jcoomes parents: 20417 diff changeset	663
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	664 // Do anything common to GC's.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	665 virtual void gc_prologue(bool full);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	666 virtual void gc_epilogue(bool full);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	667
8505 dee7c8b578c7 -Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC Christos Kotselidis <christos.kotselidis@oracle.com> parents: 8504 diff changeset	668 #ifdef GRAAL
dee7c8b578c7 -Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC Christos Kotselidis <christos.kotselidis@oracle.com> parents: 8504 diff changeset	669 HeapWord** top_addr() const;
dee7c8b578c7 -Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC Christos Kotselidis <christos.kotselidis@oracle.com> parents: 8504 diff changeset	670 HeapWord** end_addr() const;
dee7c8b578c7 -Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC Christos Kotselidis <christos.kotselidis@oracle.com> parents: 8504 diff changeset	671 #endif
dee7c8b578c7 -Integration of WB Serial Snippets-Integration of G1 WB Snippets (partially working)-Fix allocation bug with -XX:-UseTLAB and -XX:+UseSerialGC Christos Kotselidis <christos.kotselidis@oracle.com> parents: 8504 diff changeset	672
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	673 inline void set_humongous_is_live(oop obj);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	674
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	675 bool humongous_is_live(uint region) {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	676 return _humongous_is_live.is_live(region);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	677 }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	678
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	679 // Returns whether the given region (which must be a humongous (start) region)
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	680 // is to be considered conservatively live regardless of any other conditions.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	681 bool humongous_region_is_always_live(uint index);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	682 // Register the given region to be part of the collection set.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	683 inline void register_humongous_region_with_in_cset_fast_test(uint index);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	684 // Register regions with humongous objects (actually on the start region) in
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	685 // the in_cset_fast_test table.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	686 void register_humongous_regions_with_in_cset_fast_test();
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	687 // We register a region with the fast "in collection set" test. We
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	688 // simply set to true the array slot corresponding to this region.
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	689 void register_region_with_in_cset_fast_test(HeapRegion* r) {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	690 _in_cset_fast_test.set_in_cset(r->hrm_index());
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	691 }
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	692
818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	693 // This is a fast test on whether a reference points into the
17688 2c2ae9e5f65d 8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test tschatzl parents: 17636 diff changeset	694 // collection set or not. Assume that the reference
2c2ae9e5f65d 8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test tschatzl parents: 17636 diff changeset	695 // points into the heap.
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	696 inline bool in_cset_fast_test(oop obj);
526 818efdefcc99 6484956: G1: improve evacuation pause efficiency tonyp parents: 519 diff changeset	697
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	698 void clear_cset_fast_test() {
20212 d7e2d5f2846b 8027553: Change the in_cset_fast_test functionality to use the G1BiasedArray abstraction tschatzl parents: 20197 diff changeset	699 _in_cset_fast_test.clear();
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	700 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	701
6120 37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	702 // This is called at the start of either a concurrent cycle or a Full
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	703 // GC to update the number of old marking cycles started.
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	704 void increment_old_marking_cycles_started();
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	705
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	706 // This is called at the end of either a concurrent cycle or a Full
6120 37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	707 // GC to update the number of old marking cycles completed. Those two
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	708 // can happen in a nested fashion, i.e., we start a concurrent
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	709 // cycle, a Full GC happens half-way through it which ends first,
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	710 // and then the cycle notices that a Full GC happened and ends
2030 fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	711 // too. The concurrent parameter is a boolean to help us do a bit
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	712 // tighter consistency checking in the method. If concurrent is
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	713 // false, the caller is the inner caller in the nesting (i.e., the
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	714 // Full GC). If concurrent is true, the caller is the outer caller
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	715 // in this nesting (i.e., the concurrent cycle). Further nesting is
6120 37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	716 // not currently supported. The end of this call also notifies
2030 fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	717 // the FullGCCount_lock in case a Java thread is waiting for a full
fb712ff22571 7000559: G1: assertion failure !outer \|\| (full_collections_started == _full_collections_completed + 1) tonyp parents: 1991 diff changeset	718 // GC to happen (e.g., it called System.gc() with
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	719 // +ExplicitGCInvokesConcurrent).
6120 37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	720 void increment_old_marking_cycles_completed(bool concurrent);
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	721
6120 37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	722 unsigned int old_marking_cycles_completed() {
37552638d24a 7172388: G1: _total_full_collections should not be incremented for concurrent cycles brutisso parents: 6010 diff changeset	723 return _old_marking_cycles_completed;
1656 4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	724 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly tonyp parents: 1611 diff changeset	725
13400 86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data mgronlun parents: 12352 diff changeset	726 void register_concurrent_cycle_start(const Ticks& start_time);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	727 void register_concurrent_cycle_end();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	728 void trace_heap_after_concurrent_cycle();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	729
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	730 G1YCType yc_type();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	731
3778 5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	732 G1HRPrinter* hr_printer() { return &_hr_printer; }
5f6f2615433a 7049999: G1: Make the G1PrintHeapRegions output consistent and complete tonyp parents: 3777 diff changeset	733
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	734 // Frees a non-humongous region by initializing its contents and
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	735 // adding it to the free list that's passed as a parameter (this is
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	736 // usually a local list which will be appended to the master free
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	737 // list later). The used bytes of freed regions are accumulated in
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	738 // pre_used. If par is true, the region's RSet will not be freed
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	739 // up. The assumption is that this will be done later.
17755 96b1c2e06e25 8027295: Free CSet takes ~50% of young pause time tschatzl parents: 17753 diff changeset	740 // The locked parameter indicates if the caller has already taken
96b1c2e06e25 8027295: Free CSet takes ~50% of young pause time tschatzl parents: 17753 diff changeset	741 // care of proper synchronization. This may allow some optimizations.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	742 void free_region(HeapRegion* hr,
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	743 FreeRegionList* free_list,
17755 96b1c2e06e25 8027295: Free CSet takes ~50% of young pause time tschatzl parents: 17753 diff changeset	744 bool par,
96b1c2e06e25 8027295: Free CSet takes ~50% of young pause time tschatzl parents: 17753 diff changeset	745 bool locked = false);
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	746
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	747 // Frees a humongous region by collapsing it into individual regions
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	748 // and calling free_region() for each of them. The freed regions
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	749 // will be added to the free list that's passed as a parameter (this
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	750 // is usually a local list which will be appended to the master free
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	751 // list later). The used bytes of freed regions are accumulated in
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	752 // pre_used. If par is true, the region's RSet will not be freed
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	753 // up. The assumption is that this will be done later.
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	754 void free_humongous_region(HeapRegion* hr,
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	755 FreeRegionList* free_list,
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	756 bool par);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	757 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	758
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	759 // Shrink the garbage-first heap by at most the given size (in bytes!).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	760 // (Rounds down to a HeapRegion boundary.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	761 virtual void shrink(size_t expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	762 void shrink_helper(size_t expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	763
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	764 #if TASKQUEUE_STATS
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	765 static void print_taskqueue_stats_hdr(outputStream* const st = gclog_or_tty);
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	766 void print_taskqueue_stats(outputStream* const st = gclog_or_tty) const;
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	767 void reset_taskqueue_stats();
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	768 #endif // TASKQUEUE_STATS
5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	769
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	770 // Schedule the VM operation that will do an evacuation pause to
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	771 // satisfy an allocation request of word_size. *succeeded will
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	772 // return whether the VM operation was successful (it did do an
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	773 // evacuation pause) or not (another thread beat us to it or the GC
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	774 // locker was active). Given that we should not be holding the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	775 // Heap_lock when we enter this method, we will pass the
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	776 // gc_count_before (i.e., total_collections()) as a parameter since
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	777 // it has to be read while holding the Heap_lock. Currently, both
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	778 // methods that call do_collection_pause() release the Heap_lock
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	779 // before the call, so it's easy to read gc_count_before just before.
12113 f7d3b4387a16 8022872: G1: Use correct GC cause for young GC triggered by humongous allocations brutisso parents: 12080 diff changeset	780 HeapWord* do_collection_pause(size_t word_size,
f7d3b4387a16 8022872: G1: Use correct GC cause for young GC triggered by humongous allocations brutisso parents: 12080 diff changeset	781 unsigned int gc_count_before,
f7d3b4387a16 8022872: G1: Use correct GC cause for young GC triggered by humongous allocations brutisso parents: 12080 diff changeset	782 bool* succeeded,
f7d3b4387a16 8022872: G1: Use correct GC cause for young GC triggered by humongous allocations brutisso parents: 12080 diff changeset	783 GCCause::Cause gc_cause);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	784
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	785 // The guts of the incremental collection pause, executed by the vm
1973 631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	786 // thread. It returns false if it is unable to do the collection due
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	787 // to the GC locker being active, true otherwise
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations tonyp parents: 1972 diff changeset	788 bool do_collection_pause_at_safepoint(double target_pause_time_ms);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	789
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	790 // Actually do the work of evacuating the collection set.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	791 void evacuate_collection_set(EvacuationInfo& evacuation_info);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	792
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	793 // The g1 remembered set of the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	794 G1RemSet* _g1_rem_set;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	795
616 4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	796 // A set of cards that cover the objects for which the Rsets should be updated
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	797 // concurrently after the collection.
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	798 DirtyCardQueueSet _dirty_card_queue_set;
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	799
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	800 // The closure used to refine a single card.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	801 RefineCardTableEntryClosure* _refine_cte_cl;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	802
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	803 // A function to check the consistency of dirty card logs.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	804 void check_ct_logs_at_safepoint();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	805
1705 2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	806 // A DirtyCardQueueSet that is used to hold cards that contain
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	807 // references into the current collection set. This is used to
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	808 // update the remembered sets of the regions in the collection
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	809 // set in the event of an evacuation failure.
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	810 DirtyCardQueueSet _into_cset_dirty_card_queue_set;
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	811
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	812 // After a collection pause, make the regions in the CS into free
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	813 // regions.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	814 void free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	815
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	816 // Abandon the current collection set without recording policy
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	817 // statistics or updating free lists.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	818 void abandon_collection_set(HeapRegion* cs_head);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	819
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	820 // Applies "scan_non_heap_roots" to roots outside the heap,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	821 // "scan_rs" to roots inside the heap (having done "set_region" to
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	822 // indicate the region in which the root resides),
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	823 // and does "scan_metadata" If "scan_rs" is
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	824 // NULL, then this step is skipped. The "worker_i"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	825 // param is for use with parallel roots processing, and should be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	826 // the "i" of the calling parallel worker thread's work(i) function.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	827 // In the sequential case this param will be ignored.
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	828 void g1_process_roots(OopClosure* scan_non_heap_roots,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	829 OopClosure* scan_non_heap_weak_roots,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	830 OopsInHeapRegionClosure* scan_rs,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	831 CLDClosure* scan_strong_clds,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	832 CLDClosure* scan_weak_clds,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	833 CodeBlobClosure* scan_strong_code,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	834 uint worker_i);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	835
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	836 // The concurrent marker (and the thread it runs in.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	837 ConcurrentMark* _cm;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	838 ConcurrentMarkThread* _cmThread;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	839 bool _mark_in_progress;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	840
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	841 // The concurrent refiner.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	842 ConcurrentG1Refine* _cg1r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	843
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	844 // The parallel task queues
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	845 RefToScanQueueSet *_task_queues;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	846
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	847 // True iff a evacuation has failed in the current collection.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	848 bool _evacuation_failed;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	849
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	850 EvacuationFailedInfo* _evacuation_failed_info_array;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	851
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	852 // Failed evacuations cause some logical from-space objects to have
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	853 // forwarding pointers to themselves. Reset them.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	854 void remove_self_forwarding_pointers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	855
8038 ad747ee9d0b1 8002144: G1: large number of evacuation failures may lead to large c heap memory usage brutisso parents: 6819 diff changeset	856 // Together, these store an object with a preserved mark, and its mark value.
ad747ee9d0b1 8002144: G1: large number of evacuation failures may lead to large c heap memory usage brutisso parents: 6819 diff changeset	857 Stack<oop, mtGC> _objs_with_preserved_marks;
ad747ee9d0b1 8002144: G1: large number of evacuation failures may lead to large c heap memory usage brutisso parents: 6819 diff changeset	858 Stack<markOop, mtGC> _preserved_marks_of_objs;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	859
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	860 // Preserve the mark of "obj", if necessary, in preparation for its mark
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	861 // word being overwritten with a self-forwarding-pointer.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	862 void preserve_mark_if_necessary(oop obj, markOop m);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	863
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	864 // The stack of evac-failure objects left to be scanned.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	865 GrowableArray<oop>* _evac_failure_scan_stack;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	866 // The closure to apply to evac-failure objects.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	867
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	868 OopsInHeapRegionClosure* _evac_failure_closure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	869 // Set the field above.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	870 void
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	871 set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_closure) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	872 _evac_failure_closure = evac_failure_closure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	873 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	874
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	875 // Push "obj" on the scan stack.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	876 void push_on_evac_failure_scan_stack(oop obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	877 // Process scan stack entries until the stack is empty.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	878 void drain_evac_failure_scan_stack();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	879 // True iff an invocation of "drain_scan_stack" is in progress; to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	880 // prevent unnecessary recursion.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	881 bool _drain_in_progress;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	882
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	883 // Do any necessary initialization for evacuation-failure handling.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	884 // "cl" is the closure that will be used to process evac-failure
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	885 // objects.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	886 void init_for_evac_failure(OopsInHeapRegionClosure* cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	887 // Do any necessary cleanup for evacuation-failure handling data
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	888 // structures.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	889 void finalize_for_evac_failure();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	890
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	891 // An attempt to evacuate "obj" has failed; take necessary steps.
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	892 oop handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, oop obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	893 void handle_evacuation_failure_common(oop obj, markOop m);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	894
6629 c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	895 #ifndef PRODUCT
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	896 // Support for forcing evacuation failures. Analogous to
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	897 // PromotionFailureALot for the other collectors.
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	898
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	899 // Records whether G1EvacuationFailureALot should be in effect
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	900 // for the current GC
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	901 bool _evacuation_failure_alot_for_current_gc;
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	902
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	903 // Used to record the GC number for interval checking when
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	904 // determining whether G1EvaucationFailureALot is in effect
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	905 // for the current GC.
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	906 size_t _evacuation_failure_alot_gc_number;
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	907
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	908 // Count of the number of evacuations between failures.
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	909 volatile size_t _evacuation_failure_alot_count;
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	910
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	911 // Set whether G1EvacuationFailureALot should be in effect
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	912 // for the current GC (based upon the type of GC and which
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	913 // command line flags are set);
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	914 inline bool evacuation_failure_alot_for_gc_type(bool gcs_are_young,
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	915 bool during_initial_mark,
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	916 bool during_marking);
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	917
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	918 inline void set_evacuation_failure_alot_for_current_gc();
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	919
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	920 // Return true if it's time to cause an evacuation failure.
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	921 inline bool evacuation_should_fail();
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	922
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	923 // Reset the G1EvacuationFailureALot counters. Should be called at
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	924 // the end of an evacuation pause in which an evacuation failure occurred.
6629 c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	925 inline void reset_evacuation_should_fail();
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	926 #endif // !PRODUCT
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures johnc parents: 6628 diff changeset	927
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	928 // ("Weak") Reference processing support.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	929 //
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	930 // G1 has 2 instances of the reference processor class. One
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	931 // (_ref_processor_cm) handles reference object discovery
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	932 // and subsequent processing during concurrent marking cycles.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	933 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	934 // The other (_ref_processor_stw) handles reference object
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	935 // discovery and processing during full GCs and incremental
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	936 // evacuation pauses.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	937 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	938 // During an incremental pause, reference discovery will be
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	939 // temporarily disabled for _ref_processor_cm and will be
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	940 // enabled for _ref_processor_stw. At the end of the evacuation
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	941 // pause references discovered by _ref_processor_stw will be
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	942 // processed and discovery will be disabled. The previous
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	943 // setting for reference object discovery for _ref_processor_cm
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	944 // will be re-instated.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	945 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	946 // At the start of marking:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	947 // * Discovery by the CM ref processor is verified to be inactive
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	948 // and it's discovered lists are empty.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	949 // * Discovery by the CM ref processor is then enabled.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	950 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	951 // At the end of marking:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	952 // * Any references on the CM ref processor's discovered
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	953 // lists are processed (possibly MT).
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	954 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	955 // At the start of full GC we:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	956 // * Disable discovery by the CM ref processor and
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	957 // empty CM ref processor's discovered lists
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	958 // (without processing any entries).
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	959 // * Verify that the STW ref processor is inactive and it's
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	960 // discovered lists are empty.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	961 // * Temporarily set STW ref processor discovery as single threaded.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	962 // * Temporarily clear the STW ref processor's _is_alive_non_header
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	963 // field.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	964 // * Finally enable discovery by the STW ref processor.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	965 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	966 // The STW ref processor is used to record any discovered
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	967 // references during the full GC.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	968 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	969 // At the end of a full GC we:
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	970 // * Enqueue any reference objects discovered by the STW ref processor
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	971 // that have non-live referents. This has the side-effect of
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	972 // making the STW ref processor inactive by disabling discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	973 // * Verify that the CM ref processor is still inactive
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	974 // and no references have been placed on it's discovered
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	975 // lists (also checked as a precondition during initial marking).
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	976
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	977 // The (stw) reference processor...
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	978 ReferenceProcessor* _ref_processor_stw;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	979
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	980 STWGCTimer* _gc_timer_stw;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	981 ConcurrentGCTimer* _gc_timer_cm;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	982
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	983 G1OldTracer* _gc_tracer_cm;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	984 G1NewTracer* _gc_tracer_stw;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	985
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	986 // During reference object discovery, the _is_alive_non_header
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	987 // closure (if non-null) is applied to the referent object to
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	988 // determine whether the referent is live. If so then the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	989 // reference object does not need to be 'discovered' and can
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	990 // be treated as a regular oop. This has the benefit of reducing
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	991 // the number of 'discovered' reference objects that need to
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	992 // be processed.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	993 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	994 // Instance of the is_alive closure for embedding into the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	995 // STW reference processor as the _is_alive_non_header field.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	996 // Supplying a value for the _is_alive_non_header field is
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	997 // optional but doing so prevents unnecessary additions to
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	998 // the discovered lists during reference discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	999 G1STWIsAliveClosure _is_alive_closure_stw;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1000
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1001 // The (concurrent marking) reference processor...
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1002 ReferenceProcessor* _ref_processor_cm;
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1003
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 2030 diff changeset	1004 // Instance of the concurrent mark is_alive closure for embedding
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1005 // into the Concurrent Marking reference processor as the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1006 // _is_alive_non_header field. Supplying a value for the
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1007 // _is_alive_non_header field is optional but doing so prevents
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1008 // unnecessary additions to the discovered lists during reference
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1009 // discovery.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1010 G1CMIsAliveClosure _is_alive_closure_cm;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1011
4709 fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1012 // Cache used by G1CollectedHeap::start_cset_region_for_worker().
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1013 HeapRegion** _worker_cset_start_region;
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1014
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1015 // Time stamp to validate the regions recorded in the cache
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1016 // used by G1CollectedHeap::start_cset_region_for_worker().
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1017 // The heap region entry for a given worker is valid iff
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1018 // the associated time stamp value matches the current value
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1019 // of G1CollectedHeap::_gc_time_stamp.
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1020 unsigned int* _worker_cset_start_region_time_stamp;
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1021
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	1022 enum G1H_process_roots_tasks {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 4783 diff changeset	1023 G1H_PS_filter_satb_buffers,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1024 G1H_PS_refProcessor_oops_do,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1025 // Leave this one last.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1026 G1H_PS_NumElements
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1027 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1028
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1029 SubTasksDone* _process_strong_tasks;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1030
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1031 volatile bool _free_regions_coming;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1032
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1033 public:
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	1034
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	1035 SubTasksDone* process_strong_tasks() { return _process_strong_tasks; }
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	1036
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1037 void set_refine_cte_cl_concurrency(bool concurrent);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1038
1709 5f429ee79634 6966222: G1: simplify TaskQueue overflow handling jcoomes parents: 1705 diff changeset	1039 RefToScanQueue *task_queue(int i) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1040
616 4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	1041 // A set of cards where updates happened during the GC
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	1042 DirtyCardQueueSet& dirty_card_queue_set() { return _dirty_card_queue_set; }
4f360ec815ba 6720309: G1: don't synchronously update RSet during evacuation pauses iveresov parents: 545 diff changeset	1043
1705 2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1044 // A DirtyCardQueueSet that is used to hold cards that contain
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1045 // references into the current collection set. This is used to
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1046 // update the remembered sets of the regions in the collection
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1047 // set in the event of an evacuation failure.
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1048 DirtyCardQueueSet& into_cset_dirty_card_queue_set()
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1049 { return _into_cset_dirty_card_queue_set; }
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1050
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1051 // Create a G1CollectedHeap with the specified policy.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1052 // Must call the initialize method afterwards.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1053 // May not return if something goes wrong.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1054 G1CollectedHeap(G1CollectorPolicy* policy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1055
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1056 // Initialize the G1CollectedHeap to have the initial and
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1057 // maximum sizes and remembered and barrier sets
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1058 // specified by the policy object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1059 jint initialize();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1060
17947 1772223a25a2 8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV pliden parents: 17844 diff changeset	1061 virtual void stop();
1772223a25a2 8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV pliden parents: 17844 diff changeset	1062
12233 40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12113 diff changeset	1063 // Return the (conservative) maximum heap alignment for any G1 heap
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12113 diff changeset	1064 static size_t conservative_max_heap_alignment();
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12113 diff changeset	1065
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1066 // Initialize weak reference processing.
2037 b03260081e9b 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field johnc parents: 2030 diff changeset	1067 virtual void ref_processing_init();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1068
4728 441e946dc1af 7121618: Change type of number of GC workers to unsigned int. jmasa parents: 4709 diff changeset	1069 void set_par_threads(uint t) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1070 SharedHeap::set_par_threads(t);
4095 bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1071 // Done in SharedHeap but oddly there are
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1072 // two _process_strong_tasks's in a G1CollectedHeap
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1073 // so do it here too.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1074 _process_strong_tasks->set_n_threads(t);
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1075 }
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1076
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1077 // Set _n_par_threads according to a policy TBD.
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1078 void set_par_threads();
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1079
bca17e38de00 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads jmasa parents: 4090 diff changeset	1080 void set_n_termination(int t) {
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1718 diff changeset	1081 _process_strong_tasks->set_n_threads(t);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1082 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1083
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1084 virtual CollectedHeap::Name kind() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1085 return CollectedHeap::G1CollectedHeap;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1086 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1087
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1088 // The current policy object for the collector.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1089 G1CollectorPolicy* g1_policy() const { return _g1_policy; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1090
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1091 virtual CollectorPolicy* collector_policy() const { return (CollectorPolicy*) g1_policy(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1092
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1093 // Adaptive size policy. No such thing for g1.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1094 virtual AdaptiveSizePolicy* size_policy() { return NULL; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1095
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1096 // The rem set and barrier set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1097 G1RemSet* g1_rem_set() const { return _g1_rem_set; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1098
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1099 unsigned get_gc_time_stamp() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1100 return _gc_time_stamp;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1101 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1102
20197 ce8f6bb717c9 8042195: Introduce umbrella header orderAccess.inline.hpp. goetz parents: 17992 diff changeset	1103 inline void reset_gc_time_stamp();
353 9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!) iveresov parents: 342 diff changeset	1104
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1105 void check_gc_time_stamps() PRODUCT_RETURN;
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1106
20197 ce8f6bb717c9 8042195: Introduce umbrella header orderAccess.inline.hpp. goetz parents: 17992 diff changeset	1107 inline void increment_gc_time_stamp();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1108
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1109 // Reset the given region's GC timestamp. If it's starts humongous,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1110 // also reset the GC timestamp of its corresponding
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1111 // continues humongous regions too.
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1112 void reset_gc_time_stamps(HeapRegion* hr);
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1113
1705 2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1114 void iterate_dirty_card_closure(CardTableEntryClosure* cl,
2d160770d2e5 6814437: G1: remove the _new_refs array johnc parents: 1656 diff changeset	1115 DirtyCardQueue* into_cset_dcq,
17844 8847586c9037 8016302: Change type of the number of GC workers to unsigned int (2) vkempik parents: 17833 diff changeset	1116 bool concurrent, uint worker_i);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1117
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1118 // The shared block offset table array.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1119 G1BlockOffsetSharedArray* bot_shared() const { return _bot_shared; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1120
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1121 // Reference Processing accessors
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1122
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1123 // The STW reference processor....
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1124 ReferenceProcessor* ref_processor_stw() const { return _ref_processor_stw; }
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1125
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	1126 // The Concurrent Marking reference processor...
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3973 diff changeset	1127 ReferenceProcessor* ref_processor_cm() const { return _ref_processor_cm; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1128
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	1129 ConcurrentGCTimer* gc_timer_cm() const { return _gc_timer_cm; }
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	1130 G1OldTracer* gc_tracer_cm() const { return _gc_tracer_cm; }
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	1131
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1132 virtual size_t capacity() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1133 virtual size_t used() const;
846 42d84bbbecf4 6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf") tonyp parents: 845 diff changeset	1134 // This should be called when we're not holding the heap lock. The
42d84bbbecf4 6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf") tonyp parents: 845 diff changeset	1135 // result might be a bit inaccurate.
42d84bbbecf4 6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf") tonyp parents: 845 diff changeset	1136 size_t used_unlocked() const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1137 size_t recalculate_used() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1138
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1139 // These virtual functions do the actual allocation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1140 // Some heaps may offer a contiguous region for shared non-blocking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1141 // allocation, via inlined code (by exporting the address of the top and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1142 // end fields defining the extent of the contiguous allocation region.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1143 // But G1CollectedHeap doesn't yet support this.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1144
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1145 virtual bool is_maximal_no_gc() const {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1146 return _hrm.available() == 0;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1147 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1148
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1149 // The current number of regions in the heap.
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1150 uint num_regions() const { return _hrm.length(); }
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1151
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1152 // The max number of regions in the heap.
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1153 uint max_regions() const { return _hrm.max_length(); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1154
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1155 // The number of regions that are completely free.
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1156 uint num_free_regions() const { return _hrm.num_free_regions(); }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1157
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1158 // The number of regions that are not completely free.
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1159 uint num_used_regions() const { return num_regions() - num_free_regions(); }
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1160
3317 063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3289 diff changeset	1161 void verify_not_dirty_region(HeapRegion* hr) PRODUCT_RETURN;
063382f9b575 7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...) tonyp parents: 3289 diff changeset	1162 void verify_dirty_region(HeapRegion* hr) PRODUCT_RETURN;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	1163 void verify_dirty_young_list(HeapRegion* head) PRODUCT_RETURN;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	1164 void verify_dirty_young_regions() PRODUCT_RETURN;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: 2432 diff changeset	1165
20291 e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1166 #ifndef PRODUCT
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1167 // Make sure that the given bitmap has no marked objects in the
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1168 // range [from,limit). If it does, print an error message and return
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1169 // false. Otherwise, just return true. bitmap_name should be "prev"
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1170 // or "next".
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1171 bool verify_no_bits_over_tams(const char* bitmap_name, CMBitMapRO* bitmap,
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1172 HeapWord* from, HeapWord* limit);
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1173
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1174 // Verify that the prev / next bitmap range [tams,end) for the given
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1175 // region has no marks. Return true if all is well, false if errors
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1176 // are detected.
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1177 bool verify_bitmaps(const char* caller, HeapRegion* hr);
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1178 #endif // PRODUCT
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1179
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1180 // If G1VerifyBitmaps is set, verify that the marking bitmaps for
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1181 // the given region do not have any spurious marks. If errors are
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1182 // detected, print appropriate error messages and crash.
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1183 void check_bitmaps(const char* caller, HeapRegion* hr) PRODUCT_RETURN;
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1184
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1185 // If G1VerifyBitmaps is set, verify that the marking bitmaps do not
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1186 // have any spurious marks. If errors are detected, print
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1187 // appropriate error messages and crash.
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1188 void check_bitmaps(const char* caller) PRODUCT_RETURN;
e0954897238a 7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS brutisso parents: 20278 diff changeset	1189
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1190 // verify_region_sets() performs verification over the region
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1191 // lists. It will be compiled in the product code to be used when
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1192 // necessary (i.e., during heap verification).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1193 void verify_region_sets();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1194
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1195 // verify_region_sets_optional() is planted in the code for
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1196 // list verification in non-product builds (and it can be enabled in
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	1197 // product builds by defining HEAP_REGION_SET_FORCE_VERIFY to be 1).
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1198 #if HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1199 void verify_region_sets_optional() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1200 verify_region_sets();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1201 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1202 #else // HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1203 void verify_region_sets_optional() { }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1204 #endif // HEAP_REGION_SET_FORCE_VERIFY
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1205
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1206 #ifdef ASSERT
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1207 bool is_on_master_free_list(HeapRegion* hr) {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1208 return _hrm.is_free(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1209 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1210 #endif // ASSERT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1211
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1212 // Wrapper for the region list operations that can be called from
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1213 // methods outside this class.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1214
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17759 diff changeset	1215 void secondary_free_list_add(FreeRegionList* list) {
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17759 diff changeset	1216 _secondary_free_list.add_ordered(list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1217 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1218
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1219 void append_secondary_free_list() {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1220 _hrm.insert_list_into_free_list(&_secondary_free_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1221 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1222
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1223 void append_secondary_free_list_if_not_empty_with_lock() {
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1224 // If the secondary free list looks empty there's no reason to
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2311 diff changeset	1225 // take the lock and then try to append it.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1226 if (!_secondary_free_list.is_empty()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1227 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1228 append_secondary_free_list();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1229 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1230 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1231
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1232 inline void old_set_remove(HeapRegion* hr);
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3988 diff changeset	1233
4829 9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1234 size_t non_young_capacity_bytes() {
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1235 return _old_set.total_capacity_bytes() + _humongous_set.total_capacity_bytes();
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1236 }
9509c20bba28 6976060: G1: humongous object allocations should initiate marking cycles when necessary brutisso parents: 4787 diff changeset	1237
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1238 void set_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1239 void reset_free_regions_coming();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1240 bool free_regions_coming() { return _free_regions_coming; }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 2134 diff changeset	1241 void wait_while_free_regions_coming();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1242
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4910 diff changeset	1243 // Determine whether the given region is one that we are using as an
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4910 diff changeset	1244 // old GC alloc region.
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4910 diff changeset	1245 bool is_old_gc_alloc_region(HeapRegion* hr) {
20404 227a9e5e4b4a 8057536: Refactor G1 to allow context specific allocations sjohanss parents: 20377 diff changeset	1246 return _allocator->is_retained_old_region(hr);
4912 a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4910 diff changeset	1247 }
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should tonyp parents: 4910 diff changeset	1248
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1249 // Perform a collection of the heap; intended for use in implementing
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1250 // "System.gc". This probably implies as full a collection as the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1251 // "CollectedHeap" supports.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1252 virtual void collect(GCCause::Cause cause);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1253
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1254 // The same as above but assume that the caller holds the Heap_lock.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1255 void collect_locked(GCCause::Cause cause);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1256
20584 ef9eda2c1abe 8061234: ResourceContext.requestAccurateUpdate() is unreliable sjohanss parents: 20543 diff changeset	1257 virtual bool copy_allocation_context_stats(const jint* contexts,
20446 c10b463abc6e 8057824: methods to copy allocation context statistics jcoomes parents: 20445 diff changeset	1258 jlong* totals,
c10b463abc6e 8057824: methods to copy allocation context statistics jcoomes parents: 20445 diff changeset	1259 jbyte* accuracy,
c10b463abc6e 8057824: methods to copy allocation context statistics jcoomes parents: 20445 diff changeset	1260 jint len);
c10b463abc6e 8057824: methods to copy allocation context statistics jcoomes parents: 20445 diff changeset	1261
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10374 diff changeset	1262 // True iff an evacuation has failed in the most-recent collection.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1263 bool evacuation_failed() { return _evacuation_failed; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1264
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	1265 void remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, const HeapRegionSetCount& humongous_regions_removed);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	1266 void prepend_to_freelist(FreeRegionList* list);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 17727 diff changeset	1267 void decrement_summary_bytes(size_t bytes);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1268
4708 3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4097 diff changeset	1269 // Returns "TRUE" iff "p" points into the committed areas of the heap.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1270 virtual bool is_in(const void* p) const;
20337 1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1271 #ifdef ASSERT
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1272 // Returns whether p is in one of the available areas of the heap. Slow but
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1273 // extensive version.
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1274 bool is_in_exact(const void* p) const;
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1275 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1276
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1277 // Return "TRUE" iff the given object address is within the collection
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1278 // set. Slow implementation.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1279 inline bool obj_in_cs(oop obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1280
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1281 inline bool is_in_cset(oop obj);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1282
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1283 inline bool is_in_cset_or_humongous(const oop obj);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1284
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1285 enum in_cset_state_t {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1286 InNeither, // neither in collection set nor humongous
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1287 InCSet, // region is in collection set only
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1288 IsHumongous // region is a humongous start region
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1289 };
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1290 private:
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1291 // Instances of this class are used for quick tests on whether a reference points
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1292 // into the collection set or is a humongous object (points into a humongous
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1293 // object).
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1294 // Each of the array's elements denotes whether the corresponding region is in
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1295 // the collection set or a humongous region.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1296 // We use this to quickly reclaim humongous objects: by making a humongous region
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1297 // succeed this test, we sort-of add it to the collection set. During the reference
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1298 // iteration closures, when we see a humongous region, we simply mark it as
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1299 // referenced, i.e. live.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1300 class G1FastCSetBiasedMappedArray : public G1BiasedMappedArray<char> {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1301 protected:
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1302 char default_value() const { return G1CollectedHeap::InNeither; }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1303 public:
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1304 void set_humongous(uintptr_t index) {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1305 assert(get_by_index(index) != InCSet, "Should not overwrite InCSet values");
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1306 set_by_index(index, G1CollectedHeap::IsHumongous);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1307 }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1308
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1309 void clear_humongous(uintptr_t index) {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1310 set_by_index(index, G1CollectedHeap::InNeither);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1311 }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1312
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1313 void set_in_cset(uintptr_t index) {
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1314 assert(get_by_index(index) != G1CollectedHeap::IsHumongous, "Should not overwrite IsHumongous value");
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1315 set_by_index(index, G1CollectedHeap::InCSet);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1316 }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1317
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1318 bool is_in_cset_or_humongous(HeapWord* addr) const { return get_by_address(addr) != G1CollectedHeap::InNeither; }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1319 bool is_in_cset(HeapWord* addr) const { return get_by_address(addr) == G1CollectedHeap::InCSet; }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1320 G1CollectedHeap::in_cset_state_t at(HeapWord* addr) const { return (G1CollectedHeap::in_cset_state_t)get_by_address(addr); }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1321 void clear() { G1BiasedMappedArray<char>::clear(); }
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1322 };
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1323
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1324 // This array is used for a quick test on whether a reference points into
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1325 // the collection set or not. Each of the array's elements denotes whether the
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1326 // corresponding region is in the collection set or not.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1327 G1FastCSetBiasedMappedArray _in_cset_fast_test;
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1328
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1329 public:
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1330
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1331 inline in_cset_state_t in_cset_state(const oop obj);
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1332
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1333 // Return "TRUE" iff the given object address is in the reserved
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1334 // region of g1.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1335 bool is_in_g1_reserved(const void* p) const {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1336 return _hrm.reserved().contains(p);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1337 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1338
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1339 // Returns a MemRegion that corresponds to the space that has been
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1340 // reserved for the heap
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1341 MemRegion g1_reserved() const {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20356 diff changeset	1342 return _hrm.reserved();
2435 371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1343 }
371bbc844bf1 7027766: G1: introduce flag to dump the liveness information per region at the end of marking tonyp parents: 2433 diff changeset	1344
2311 4e0069ff33df 7022200: G1: optimized build broken johnc parents: 2188 diff changeset	1345 virtual bool is_in_closed_subset(const void* p) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1346
20337 1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1347 G1SATBCardTableLoggingModRefBS* g1_barrier_set() {
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	1348 return (G1SATBCardTableLoggingModRefBS*) barrier_set();
12343 d55c004e1d4d 8025305: Cleanup CardTableModRefBS usage in G1 mgerdin parents: 12233 diff changeset	1349 }
d55c004e1d4d 8025305: Cleanup CardTableModRefBS usage in G1 mgerdin parents: 12233 diff changeset	1350
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1351 // This resets the card table to all zeros. It is used after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1352 // a collection pause which used the card table to claim cards.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1353 void cleanUpCardTable();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1354
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1355 // Iteration functions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1356
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1357 // Iterate over all the ref-containing fields of all objects, calling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1358 // "cl.do_oop" on each.
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1359 virtual void oop_iterate(ExtendedOopClosure* cl);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1360
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1361 // Iterate over all objects, calling "cl.do_object" on each.
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1362 virtual void object_iterate(ObjectClosure* cl);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1363
678 4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1364 virtual void safe_object_iterate(ObjectClosure* cl) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6629 diff changeset	1365 object_iterate(cl);
678 4ac7d97e6101 6822263: G1: JVMTI heap iteration fails iveresov parents: 677 diff changeset	1366 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1367
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1368 // Iterate over all spaces in use in the heap, in ascending address order.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1369 virtual void space_iterate(SpaceClosure* cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1370
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1371 // Iterate over heap regions, in address order, terminating the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1372 // iteration early if the "doHeapRegion" method returns "true".
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1373 void heap_region_iterate(HeapRegionClosure* blk) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1374
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1375 // Return the region with the given index. It assumes the index is valid.
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1376 inline HeapRegion* region_at(uint index) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1377
20305 755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1378 // Calculate the region index of the given address. Given address must be
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1379 // within the heap.
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1380 inline uint addr_to_region(HeapWord* addr) const;
755930f931e3 8027959: Early reclamation of large objects in G1 tschatzl parents: 20304 diff changeset	1381
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1382 inline HeapWord* bottom_addr_for_region(uint index) const;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1383
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1384 // Divide the heap region sequence into "chunks" of some size (the number
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1385 // of regions divided by the number of parallel threads times some
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1386 // overpartition factor, currently 4). Assumes that this will be called
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1387 // in parallel by ParallelGCThreads worker threads with discinct worker
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1388 // ids in the range [0..max(ParallelGCThreads-1, 1)], that all parallel
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1389 // calls will use the same "claim_value", and that that claim value is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1390 // different from the claim_value of any heap region before the start of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1391 // the iteration. Applies "blk->doHeapRegion" to each of the regions, by
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1392 // attempting to claim the first region in each chunk, and, if
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1393 // successful, applying the closure to each region in the chunk (and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1394 // setting the claim value of the second and subsequent regions of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1395 // chunk.) For now requires that "doHeapRegion" always returns "false",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1396 // i.e., that a closure never attempt to abort a traversal.
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1397 void heap_region_par_iterate_chunked(HeapRegionClosure* cl,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1398 uint worker_id,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1399 uint num_workers,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 20335 diff changeset	1400 jint claim_value) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1401
390 cc68c8e9b309 6752248: G1: introduce parallel heap verification tonyp parents: 355 diff changeset	1402 // It resets all the region claim values to the default.
cc68c8e9b309 6752248: G1: introduce parallel heap verification tonyp parents: 355 diff changeset	1403 void reset_heap_region_claim_values();
cc68c8e9b309 6752248: G1: introduce parallel heap verification tonyp parents: 355 diff changeset	1404
4783 023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1405 // Resets the claim values of regions in the current
023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1406 // collection set to the default.
023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1407 void reset_cset_heap_region_claim_values();
023652e49ac0 7121496: G1: do the per-region evacuation failure handling work in parallel johnc parents: 4781 diff changeset	1408
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1409 #ifdef ASSERT
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1410 bool check_heap_region_claim_values(jint claim_value);
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1411
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1412 // Same as the routine above but only checks regions in the
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1413 // current collection set.
dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1414 bool check_cset_heap_region_claim_values(jint claim_value);
355 0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1415 #endif // ASSERT
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires tonyp parents: 353 diff changeset	1416
4709 fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1417 // Clear the cached cset start regions and (more importantly)
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1418 // the time stamps. Called when we reset the GC time stamp.
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1419 void clear_cset_start_regions();
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1420
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1421 // Given the id of a worker, obtain or calculate a suitable
fd2b426c30db 7119908: G1: Cache CSet start region for each worker for subsequent reuse johnc parents: 4708 diff changeset	1422 // starting region for iterating over the current collection set.
17844 8847586c9037 8016302: Change type of the number of GC workers to unsigned int (2) vkempik parents: 17833 diff changeset	1423 HeapRegion* start_cset_region_for_worker(uint worker_i);
4097 dc467e8b2c5e 7112743: G1: Reduce overhead of marking closure during evacuation pauses johnc parents: 4095 diff changeset	1424
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1425 // Iterate over the regions (if any) in the current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1426 void collection_set_iterate(HeapRegionClosure* blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1427
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1428 // As above but starting from region r
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1429 void collection_set_iterate_from(HeapRegion* r, HeapRegionClosure *blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1430
20304 a22acf6d7598 8048112: G1 Full GC needs to support the case when the very first region is not available tschatzl parents: 20278 diff changeset	1431 HeapRegion* next_compaction_region(const HeapRegion* from) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1432
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1433 // A CollectedHeap will contain some number of spaces. This finds the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1434 // space containing a given address, or else returns NULL.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1435 virtual Space* space_containing(const void* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1436
20335 eec72fa4b108 8040722: G1: Clean up usages of heap_region_containing brutisso parents: 20331 diff changeset	1437 // Returns the HeapRegion that contains addr. addr must not be NULL.
eec72fa4b108 8040722: G1: Clean up usages of heap_region_containing brutisso parents: 20331 diff changeset	1438 template <class T>
eec72fa4b108 8040722: G1: Clean up usages of heap_region_containing brutisso parents: 20331 diff changeset	1439 inline HeapRegion* heap_region_containing_raw(const T addr) const;
eec72fa4b108 8040722: G1: Clean up usages of heap_region_containing brutisso parents: 20331 diff changeset	1440
eec72fa4b108 8040722: G1: Clean up usages of heap_region_containing brutisso parents: 20331 diff changeset	1441 // Returns the HeapRegion that contains addr. addr must not be NULL.
eec72fa4b108 8040722: G1: Clean up usages of heap_region_containing brutisso parents: 20331 diff changeset	1442 // If addr is within a humongous continues region, it returns its humongous start region.
3766 c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1443 template <class T>
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class tonyp parents: 3764 diff changeset	1444 inline HeapRegion* heap_region_containing(const T addr) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1445
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1446 // A CollectedHeap is divided into a dense sequence of "blocks"; that is,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1447 // each address in the (reserved) heap is a member of exactly
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1448 // one block. The defining characteristic of a block is that it is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1449 // possible to find its size, and thus to progress forward to the next
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1450 // block. (Blocks may be of different sizes.) Thus, blocks may
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1451 // represent Java objects, or they might be free blocks in a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1452 // free-list-based heap (or subheap), as long as the two kinds are
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1453 // distinguishable and the size of each is determinable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1454
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1455 // Returns the address of the start of the "block" that contains the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1456 // address "addr". We say "blocks" instead of "object" since some heaps
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1457 // may not pack objects densely; a chunk may either be an object or a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1458 // non-object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1459 virtual HeapWord* block_start(const void* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1460
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1461 // Requires "addr" to be the start of a chunk, and returns its size.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1462 // "addr + size" is required to be the start of a new chunk, or the end
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1463 // of the active area of the heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1464 virtual size_t block_size(const HeapWord* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1465
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1466 // Requires "addr" to be the start of a block, and returns "TRUE" iff
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1467 // the block is an object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1468 virtual bool block_is_obj(const HeapWord* addr) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1469
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1470 // Does this heap support heap inspection? (+PrintClassHistogram)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1471 virtual bool supports_heap_inspection() const { return true; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1472
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1473 // Section on thread-local allocation buffers (TLABs)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1474 // See CollectedHeap for semantics.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1475
17727 cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 17690 diff changeset	1476 bool supports_tlab_allocation() const;
cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 17690 diff changeset	1477 size_t tlab_capacity(Thread* ignored) const;
cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 17690 diff changeset	1478 size_t tlab_used(Thread* ignored) const;
cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 17690 diff changeset	1479 size_t max_tlab_size() const;
cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 17690 diff changeset	1480 size_t unsafe_max_tlab_alloc(Thread* ignored) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1481
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1482 // Can a compiler initialize a new object without store barriers?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1483 // This permission only extends from the creation of a new object
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1484 // via a TLAB up to the first subsequent safepoint. If such permission
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1485 // is granted for this heap type, the compiler promises to call
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1486 // defer_store_barrier() below on any slow path allocation of
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1487 // a new object for which such initializing store barriers will
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1488 // have been elided. G1, like CMS, allows this, but should be
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1489 // ready to provide a compensating write barrier as necessary
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1490 // if that storage came out of a non-young region. The efficiency
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1491 // of this implementation depends crucially on being able to
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1492 // answer very efficiently in constant time whether a piece of
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1493 // storage in the heap comes from a young region or not.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1494 // See ReduceInitialCardMarks.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1495 virtual bool can_elide_tlab_store_barriers() const {
3988 246daf2c601d 7005808: G1: re-enable ReduceInitialCardMarks for G1 brutisso parents: 3980 diff changeset	1496 return true;
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1497 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1498
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1499 virtual bool card_mark_must_follow_store() const {
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1500 return true;
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1501 }
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1092 diff changeset	1502
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1503 inline bool is_in_young(const oop obj);
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1504
3377 2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1505 #ifdef ASSERT
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1506 virtual bool is_in_partial_collection(const void* p);
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1507 #endif
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1508
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1509 virtual bool is_scavengable(const void* addr);
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 3317 diff changeset	1510
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1511 // We don't need barriers for initializing stores to objects
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1512 // in the young gen: for the SATB pre-barrier, there is no
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1513 // pre-value that needs to be remembered; for the remembered-set
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 942 diff changeset	1514 // update logging post-barrier, we don't maintain remembered set
3867 ff53346271fe 6814390: G1: remove the concept of non-generational G1 brutisso parents: 3830 diff changeset	1515 // information for young gen objects.
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1516 virtual inline bool can_elide_initializing_store_barrier(oop new_obj);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1517
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1518 // Returns "true" iff the given word_size is "very large".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1519 static bool isHumongous(size_t word_size) {
1313 664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1520 // Note this has to be strictly greater-than as the TLABs
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1521 // are capped at the humongous thresold and we want to
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1522 // ensure that we don't try to allocate a TLAB as
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1523 // humongous and that we don't allocate a humongous
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1524 // object in a TLAB.
664ae0c5e0e5 6755988: G1: assert(new_obj != 0 \|\| ... "should be forwarded") johnc parents: 1311 diff changeset	1525 return word_size > _humongous_object_threshold_in_words;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1526 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1527
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1528 // Update mod union table with the set of dirty cards.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1529 void updateModUnion();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1530
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1531 // Set the mod union bits corresponding to the given memRegion. Note
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1532 // that this is always a safe operation, since it doesn't clear any
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1533 // bits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1534 void markModUnionRange(MemRegion mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1535
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1536 // Records the fact that a marking phase is no longer in progress.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1537 void set_marking_complete() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1538 _mark_in_progress = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1539 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1540 void set_marking_started() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1541 _mark_in_progress = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1542 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1543 bool mark_in_progress() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1544 return _mark_in_progress;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1545 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1546
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1547 // Print the maximum heap capacity.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1548 virtual size_t max_capacity() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1549
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1550 virtual jlong millis_since_last_gc();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1551
3777 e8b0b0392037 7046182: G1: remove unnecessary iterations over the collection set tonyp parents: 3774 diff changeset	1552
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1553 // Convenience function to be used in situations where the heap type can be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1554 // asserted to be this type.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1555 static G1CollectedHeap* heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1556
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1557 void set_region_short_lived_locked(HeapRegion* hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1558 // add appropriate methods for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1559
17727 cfd4aac53239 8030177: G1: Enable TLAB resizing brutisso parents: 17690 diff changeset	1560 YoungList* young_list() const { return _young_list; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1561
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1562 // debugging
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1563 bool check_young_list_well_formed() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1564 return _young_list->check_list_well_formed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1565 }
1394 1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1566
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length johnc parents: 1391 diff changeset	1567 bool check_young_list_empty(bool check_heap,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1568 bool check_sample = true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1569
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1570 // *** Stuff related to concurrent marking. It's not clear to me that so
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1571 // many of these need to be public.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1572
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1573 // The functions below are helper functions that a subclass of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1574 // "CollectedHeap" can use in the implementation of its virtual
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1575 // functions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1576 // This performs a concurrent marking of the live objects in a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1577 // bitmap off to the side.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1578 void doConcurrentMark();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1579
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1580 bool isMarkedPrev(oop obj) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1581 bool isMarkedNext(oop obj) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1582
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1583 // Determine if an object is dead, given the object and also
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1584 // the region to which the object belongs. An object is dead
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1585 // iff a) it was not allocated since the last mark and b) it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1586 // is not marked.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1587 bool is_obj_dead(const oop obj, const HeapRegion* hr) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1588 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1589 !hr->obj_allocated_since_prev_marking(obj) &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1590 !isMarkedPrev(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1591 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1592
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1593 // This function returns true when an object has been
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1594 // around since the previous marking and hasn't yet
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1595 // been marked during this marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1596 bool is_obj_ill(const oop obj, const HeapRegion* hr) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1597 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1598 !hr->obj_allocated_since_next_marking(obj) &&
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1599 !isMarkedNext(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1600 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1601
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1602 // Determine if an object is dead, given only the object itself.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1603 // This will find the region to which the object belongs and
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1604 // then call the region version of the same function.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1605
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1606 // Added if it is NULL it isn't dead.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1607
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1608 inline bool is_obj_dead(const oop obj) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1609
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1610 inline bool is_obj_ill(const oop obj) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1611
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1612 bool allocated_since_marking(oop obj, HeapRegion* hr, VerifyOption vo);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1613 HeapWord* top_at_mark_start(HeapRegion* hr, VerifyOption vo);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1614 bool is_marked(oop obj, VerifyOption vo);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1615 const char* top_at_mark_start_str(VerifyOption vo);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1616
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1617 ConcurrentMark* concurrent_mark() const { return _cm; }
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1618
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1619 // Refinement
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1620
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1621 ConcurrentG1Refine* concurrent_g1_refine() const { return _cg1r; }
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1622
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1623 // The dirty cards region list is used to record a subset of regions
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1624 // whose cards need clearing. The list if populated during the
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1625 // remembered set scanning and drained during the card table
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1626 // cleanup. Although the methods are reentrant, population/draining
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1627 // phases must not overlap. For synchronization purposes the last
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1628 // element on the list points to itself.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1629 HeapRegion* _dirty_cards_region_list;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1630 void push_dirty_cards_region(HeapRegion* hr);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1631 HeapRegion* pop_dirty_cards_region();
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1632
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1633 // Optimized nmethod scanning support routines
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1634
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1635 // Register the given nmethod with the G1 heap
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1636 virtual void register_nmethod(nmethod* nm);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1637
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1638 // Unregister the given nmethod from the G1 heap
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1639 virtual void unregister_nmethod(nmethod* nm);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1640
17753 191174b49bec 8035406: Improve data structure for Code Cache remembered sets tschatzl parents: 17736 diff changeset	1641 // Free up superfluous code root memory.
191174b49bec 8035406: Improve data structure for Code Cache remembered sets tschatzl parents: 17736 diff changeset	1642 void purge_code_root_memory();
191174b49bec 8035406: Improve data structure for Code Cache remembered sets tschatzl parents: 17736 diff changeset	1643
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1644 // Rebuild the stong code root lists for each region
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1645 // after a full GC
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1646 void rebuild_strong_code_roots();
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1647
17634 5a32d2a3cc1e 8027476: Improve performance of Stringtable unlink tschatzl parents: 13400 diff changeset	1648 // Delete entries for dead interned string and clean up unreferenced symbols
5a32d2a3cc1e 8027476: Improve performance of Stringtable unlink tschatzl parents: 13400 diff changeset	1649 // in symbol table, possibly in parallel.
5a32d2a3cc1e 8027476: Improve performance of Stringtable unlink tschatzl parents: 13400 diff changeset	1650 void unlink_string_and_symbol_table(BoolObjectClosure* is_alive, bool unlink_strings = true, bool unlink_symbols = true);
5a32d2a3cc1e 8027476: Improve performance of Stringtable unlink tschatzl parents: 13400 diff changeset	1651
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	1652 // Parallel phase of unloading/cleaning after G1 concurrent mark.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	1653 void parallel_cleaning(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, bool class_unloading_occurred);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20257 diff changeset	1654
17756 a07bea31ef35 8035398: Add card redirty time in "Other" time in G1 tschatzl parents: 17755 diff changeset	1655 // Redirty logged cards in the refinement queue.
a07bea31ef35 8035398: Add card redirty time in "Other" time in G1 tschatzl parents: 17755 diff changeset	1656 void redirty_logged_cards();
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1657 // Verification
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1658
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1659 // The following is just to alert the verification code
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1660 // that a full collection has occurred and that the
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1661 // remembered sets are no longer up to date.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1662 bool _full_collection;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1663 void set_full_collection() { _full_collection = true;}
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1664 void clear_full_collection() {_full_collection = false;}
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1665 bool full_collection() {return _full_collection;}
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1666
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1667 // Perform any cleanup actions necessary before allowing a verification.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1668 virtual void prepare_for_verify();
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1669
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1670 // Perform verification.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1671
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1672 // vo == UsePrevMarking -> use "prev" marking information,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1673 // vo == UseNextMarking -> use "next" marking information
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1674 // vo == UseMarkWord -> use the mark word in the object header
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1675 //
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1676 // NOTE: Only the "prev" marking information is guaranteed to be
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1677 // consistent most of the time, so most calls to this should use
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1678 // vo == UsePrevMarking.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1679 // Currently, there is only one case where this is called with
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1680 // vo == UseNextMarking, which is to verify the "next" marking
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1681 // information at the end of remark.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1682 // Currently there is only one place where this is called with
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1683 // vo == UseMarkWord, which is to verify the marking during a
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1684 // full GC.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1685 void verify(bool silent, VerifyOption vo);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1686
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1687 // Override; it uses the "prev" marking information
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1688 virtual void verify(bool silent);
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1689
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1690 // The methods below are here for convenience and dispatch the
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1691 // appropriate method depending on value of the given VerifyOption
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1692 // parameter. The values for that parameter, and their meanings,
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1693 // are the same as those above.
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1694
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1695 bool is_obj_dead_cond(const oop obj,
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1696 const HeapRegion* hr,
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1697 const VerifyOption vo) const;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1698
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1699 bool is_obj_dead_cond(const oop obj,
17833 bfdf528be8e8 8038498: Fix includes and C inlining after 8035330 tschatzl parents: 17773 diff changeset	1700 const VerifyOption vo) const;
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1701
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1702 // Printing
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6197 diff changeset	1703
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1704 virtual void print_on(outputStream* st) const;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1705 virtual void print_extended_on(outputStream* st) const;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1706 virtual void print_on_error(outputStream* st) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1707
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1708 virtual void print_gc_threads_on(outputStream* st) const;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1709 virtual void gc_threads_do(ThreadClosure* tc) const;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1710
12080 5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1711 // Override
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1712 void print_tracing_info() const;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1713
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1714 // The following two methods are helpful for debugging RSet issues.
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1715 void print_cset_rsets() PRODUCT_RETURN;
5888334c9c24 7145569: G1: optimize nmethods scanning johnc parents: 11096 diff changeset	1716 void print_all_rsets() PRODUCT_RETURN;
796 29e7d79232b9 6819065: G1: eliminate high serial card table clearing time apetrusenko parents: 678 diff changeset	1717
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1718 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1719 size_t pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1720 size_t cards_scanned();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1721
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1722 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1723 size_t _max_heap_capacity;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1724 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1725
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1883 diff changeset	1726 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_HPP

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 20804:7848fc12602b