graal-compiler: src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp annotate

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp @ 1552:c18cbe5936b8

6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair

author	trims
date	Thu, 27 May 2010 19:08:38 -0700
parents	2a1472c30599
children	e9ff18c4ace7

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1311 diff changeset	2 * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1311 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1311 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: 1311 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
a61af66fc99e Initial load duke parents: diff changeset	25 class ParallelScavengeHeap;
a61af66fc99e Initial load duke parents: diff changeset	26 class PSAdaptiveSizePolicy;
a61af66fc99e Initial load duke parents: diff changeset	27 class PSYoungGen;
a61af66fc99e Initial load duke parents: diff changeset	28 class PSOldGen;
a61af66fc99e Initial load duke parents: diff changeset	29 class PSPermGen;
a61af66fc99e Initial load duke parents: diff changeset	30 class ParCompactionManager;
a61af66fc99e Initial load duke parents: diff changeset	31 class ParallelTaskTerminator;
a61af66fc99e Initial load duke parents: diff changeset	32 class PSParallelCompact;
a61af66fc99e Initial load duke parents: diff changeset	33 class GCTaskManager;
a61af66fc99e Initial load duke parents: diff changeset	34 class GCTaskQueue;
a61af66fc99e Initial load duke parents: diff changeset	35 class PreGCValues;
a61af66fc99e Initial load duke parents: diff changeset	36 class MoveAndUpdateClosure;
a61af66fc99e Initial load duke parents: diff changeset	37 class RefProcTaskExecutor;
a61af66fc99e Initial load duke parents: diff changeset	38
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	39 // The SplitInfo class holds the information needed to 'split' a source region
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	40 // so that the live data can be copied to two destination spaces. Normally,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	41 // all the live data in a region is copied to a single destination space (e.g.,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	42 // everything live in a region in eden is copied entirely into the old gen).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	43 // However, when the heap is nearly full, all the live data in eden may not fit
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	44 // into the old gen. Copying only some of the regions from eden to old gen
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	45 // requires finding a region that does not contain a partial object (i.e., no
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	46 // live object crosses the region boundary) somewhere near the last object that
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	47 // does fit into the old gen. Since it's not always possible to find such a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	48 // region, splitting is necessary for predictable behavior.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	49 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	50 // A region is always split at the end of the partial object. This avoids
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	51 // additional tests when calculating the new location of a pointer, which is a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	52 // very hot code path. The partial object and everything to its left will be
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	53 // copied to another space (call it dest_space_1). The live data to the right
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	54 // of the partial object will be copied either within the space itself, or to a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	55 // different destination space (distinct from dest_space_1).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	56 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	57 // Split points are identified during the summary phase, when region
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	58 // destinations are computed: data about the split, including the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	59 // partial_object_size, is recorded in a SplitInfo record and the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	60 // partial_object_size field in the summary data is set to zero. The zeroing is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	61 // possible (and necessary) since the partial object will move to a different
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	62 // destination space than anything to its right, thus the partial object should
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	63 // not affect the locations of any objects to its right.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	64 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	65 // The recorded data is used during the compaction phase, but only rarely: when
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	66 // the partial object on the split region will be copied across a destination
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	67 // region boundary. This test is made once each time a region is filled, and is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	68 // a simple address comparison, so the overhead is negligible (see
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	69 // PSParallelCompact::first_src_addr()).
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	70 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	71 // Notes:
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	72 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	73 // Only regions with partial objects are split; a region without a partial
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	74 // object does not need any extra bookkeeping.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	75 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	76 // At most one region is split per space, so the amount of data required is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	77 // constant.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	78 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	79 // A region is split only when the destination space would overflow. Once that
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	80 // happens, the destination space is abandoned and no other data (even from
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	81 // other source spaces) is targeted to that destination space. Abandoning the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	82 // destination space may leave a somewhat large unused area at the end, if a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	83 // large object caused the overflow.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	84 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	85 // Future work:
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	86 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	87 // More bookkeeping would be required to continue to use the destination space.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	88 // The most general solution would allow data from regions in two different
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	89 // source spaces to be "joined" in a single destination region. At the very
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	90 // least, additional code would be required in next_src_region() to detect the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	91 // join and skip to an out-of-order source region. If the join region was also
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	92 // the last destination region to which a split region was copied (the most
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	93 // likely case), then additional work would be needed to get fill_region() to
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	94 // stop iteration and switch to a new source region at the right point. Basic
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	95 // idea would be to use a fake value for the top of the source space. It is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	96 // doable, if a bit tricky.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	97 //
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	98 // A simpler (but less general) solution would fill the remainder of the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	99 // destination region with a dummy object and continue filling the next
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	100 // destination region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	101
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	102 class SplitInfo
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	103 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	104 public:
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	105 // Return true if this split info is valid (i.e., if a split has been
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	106 // recorded). The very first region cannot have a partial object and thus is
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	107 // never split, so 0 is the 'invalid' value.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	108 bool is_valid() const { return _src_region_idx > 0; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	109
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	110 // Return true if this split holds data for the specified source region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	111 inline bool is_split(size_t source_region) const;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	112
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	113 // The index of the split region, the size of the partial object on that
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	114 // region and the destination of the partial object.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	115 size_t src_region_idx() const { return _src_region_idx; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	116 size_t partial_obj_size() const { return _partial_obj_size; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	117 HeapWord* destination() const { return _destination; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	118
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	119 // The destination count of the partial object referenced by this split
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	120 // (either 1 or 2). This must be added to the destination count of the
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	121 // remainder of the source region.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	122 unsigned int destination_count() const { return _destination_count; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	123
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	124 // If a word within the partial object will be written to the first word of a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	125 // destination region, this is the address of the destination region;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	126 // otherwise this is NULL.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	127 HeapWord* dest_region_addr() const { return _dest_region_addr; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	128
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	129 // If a word within the partial object will be written to the first word of a
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	130 // destination region, this is the address of that word within the partial
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	131 // object; otherwise this is NULL.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	132 HeapWord* first_src_addr() const { return _first_src_addr; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	133
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	134 // Record the data necessary to split the region src_region_idx.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	135 void record(size_t src_region_idx, size_t partial_obj_size,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	136 HeapWord* destination);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	137
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	138 void clear();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	139
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	140 DEBUG_ONLY(void verify_clear();)
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	141
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	142 private:
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	143 size_t _src_region_idx;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	144 size_t _partial_obj_size;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	145 HeapWord* _destination;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	146 unsigned int _destination_count;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	147 HeapWord* _dest_region_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	148 HeapWord* _first_src_addr;
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	149 };
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	150
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	151 inline bool SplitInfo::is_split(size_t region_idx) const
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	152 {
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	153 return _src_region_idx == region_idx && is_valid();
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	154 }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	155
0 a61af66fc99e Initial load duke parents: diff changeset	156 class SpaceInfo
a61af66fc99e Initial load duke parents: diff changeset	157 {
a61af66fc99e Initial load duke parents: diff changeset	158 public:
a61af66fc99e Initial load duke parents: diff changeset	159 MutableSpace* space() const { return _space; }
a61af66fc99e Initial load duke parents: diff changeset	160
a61af66fc99e Initial load duke parents: diff changeset	161 // Where the free space will start after the collection. Valid only after the
a61af66fc99e Initial load duke parents: diff changeset	162 // summary phase completes.
a61af66fc99e Initial load duke parents: diff changeset	163 HeapWord* new_top() const { return _new_top; }
a61af66fc99e Initial load duke parents: diff changeset	164
a61af66fc99e Initial load duke parents: diff changeset	165 // Allows new_top to be set.
a61af66fc99e Initial load duke parents: diff changeset	166 HeapWord** new_top_addr() { return &_new_top; }
a61af66fc99e Initial load duke parents: diff changeset	167
a61af66fc99e Initial load duke parents: diff changeset	168 // Where the smallest allowable dense prefix ends (used only for perm gen).
a61af66fc99e Initial load duke parents: diff changeset	169 HeapWord* min_dense_prefix() const { return _min_dense_prefix; }
a61af66fc99e Initial load duke parents: diff changeset	170
a61af66fc99e Initial load duke parents: diff changeset	171 // Where the dense prefix ends, or the compacted region begins.
a61af66fc99e Initial load duke parents: diff changeset	172 HeapWord* dense_prefix() const { return _dense_prefix; }
a61af66fc99e Initial load duke parents: diff changeset	173
a61af66fc99e Initial load duke parents: diff changeset	174 // The start array for the (generation containing the) space, or NULL if there
a61af66fc99e Initial load duke parents: diff changeset	175 // is no start array.
a61af66fc99e Initial load duke parents: diff changeset	176 ObjectStartArray* start_array() const { return _start_array; }
a61af66fc99e Initial load duke parents: diff changeset	177
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	178 SplitInfo& split_info() { return _split_info; }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	179
0 a61af66fc99e Initial load duke parents: diff changeset	180 void set_space(MutableSpace* s) { _space = s; }
a61af66fc99e Initial load duke parents: diff changeset	181 void set_new_top(HeapWord* addr) { _new_top = addr; }
a61af66fc99e Initial load duke parents: diff changeset	182 void set_min_dense_prefix(HeapWord* addr) { _min_dense_prefix = addr; }
a61af66fc99e Initial load duke parents: diff changeset	183 void set_dense_prefix(HeapWord* addr) { _dense_prefix = addr; }
a61af66fc99e Initial load duke parents: diff changeset	184 void set_start_array(ObjectStartArray* s) { _start_array = s; }
a61af66fc99e Initial load duke parents: diff changeset	185
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	186 void publish_new_top() const { _space->set_top(_new_top); }
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	187
0 a61af66fc99e Initial load duke parents: diff changeset	188 private:
a61af66fc99e Initial load duke parents: diff changeset	189 MutableSpace* _space;
a61af66fc99e Initial load duke parents: diff changeset	190 HeapWord* _new_top;
a61af66fc99e Initial load duke parents: diff changeset	191 HeapWord* _min_dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	192 HeapWord* _dense_prefix;
a61af66fc99e Initial load duke parents: diff changeset	193 ObjectStartArray* _start_array;
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	194 SplitInfo _split_info;
0 a61af66fc99e Initial load duke parents: diff changeset	195 };
a61af66fc99e Initial load duke parents: diff changeset	196
a61af66fc99e Initial load duke parents: diff changeset	197 class ParallelCompactData
a61af66fc99e Initial load duke parents: diff changeset	198 {
a61af66fc99e Initial load duke parents: diff changeset	199 public:
a61af66fc99e Initial load duke parents: diff changeset	200 // Sizes are in HeapWords, unless indicated otherwise.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	201 static const size_t Log2RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	202 static const size_t RegionSize;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	203 static const size_t RegionSizeBytes;
0 a61af66fc99e Initial load duke parents: diff changeset	204
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	205 // Mask for the bits in a size_t to get an offset within a region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	206 static const size_t RegionSizeOffsetMask;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	207 // Mask for the bits in a pointer to get an offset within a region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	208 static const size_t RegionAddrOffsetMask;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	209 // Mask for the bits in a pointer to get the address of the start of a region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	210 static const size_t RegionAddrMask;
0 a61af66fc99e Initial load duke parents: diff changeset	211
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	212 class RegionData
0 a61af66fc99e Initial load duke parents: diff changeset	213 {
a61af66fc99e Initial load duke parents: diff changeset	214 public:
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	215 // Destination address of the region.
0 a61af66fc99e Initial load duke parents: diff changeset	216 HeapWord* destination() const { return _destination; }
a61af66fc99e Initial load duke parents: diff changeset	217
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	218 // The first region containing data destined for this region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	219 size_t source_region() const { return _source_region; }
0 a61af66fc99e Initial load duke parents: diff changeset	220
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	221 // The object (if any) starting in this region and ending in a different
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	222 // region that could not be updated during the main (parallel) compaction
0 a61af66fc99e Initial load duke parents: diff changeset	223 // phase. This is different from _partial_obj_addr, which is an object that
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	224 // extends onto a source region. However, the two uses do not overlap in
0 a61af66fc99e Initial load duke parents: diff changeset	225 // time, so the same field is used to save space.
a61af66fc99e Initial load duke parents: diff changeset	226 HeapWord* deferred_obj_addr() const { return _partial_obj_addr; }
a61af66fc99e Initial load duke parents: diff changeset	227
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	228 // The starting address of the partial object extending onto the region.
0 a61af66fc99e Initial load duke parents: diff changeset	229 HeapWord* partial_obj_addr() const { return _partial_obj_addr; }
a61af66fc99e Initial load duke parents: diff changeset	230
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	231 // Size of the partial object extending onto the region (words).
0 a61af66fc99e Initial load duke parents: diff changeset	232 size_t partial_obj_size() const { return _partial_obj_size; }
a61af66fc99e Initial load duke parents: diff changeset	233
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	234 // Size of live data that lies within this region due to objects that start
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	235 // in this region (words). This does not include the partial object
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	236 // extending onto the region (if any), or the part of an object that extends
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	237 // onto the next region (if any).
0 a61af66fc99e Initial load duke parents: diff changeset	238 size_t live_obj_size() const { return _dc_and_los & los_mask; }
a61af66fc99e Initial load duke parents: diff changeset	239
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	240 // Total live data that lies within the region (words).
0 a61af66fc99e Initial load duke parents: diff changeset	241 size_t data_size() const { return partial_obj_size() + live_obj_size(); }
a61af66fc99e Initial load duke parents: diff changeset	242
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	243 // The destination_count is the number of other regions to which data from
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	244 // this region will be copied. At the end of the summary phase, the valid
0 a61af66fc99e Initial load duke parents: diff changeset	245 // values of destination_count are
a61af66fc99e Initial load duke parents: diff changeset	246 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	247 // 0 - data from the region will be compacted completely into itself, or the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	248 // region is empty. The region can be claimed and then filled.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	249 // 1 - data from the region will be compacted into 1 other region; some
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	250 // data from the region may also be compacted into the region itself.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	251 // 2 - data from the region will be copied to 2 other regions.
0 a61af66fc99e Initial load duke parents: diff changeset	252 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	253 // During compaction as regions are emptied, the destination_count is
0 a61af66fc99e Initial load duke parents: diff changeset	254 // decremented (atomically) and when it reaches 0, it can be claimed and
a61af66fc99e Initial load duke parents: diff changeset	255 // then filled.
a61af66fc99e Initial load duke parents: diff changeset	256 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	257 // A region is claimed for processing by atomically changing the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	258 // destination_count to the claimed value (dc_claimed). After a region has
0 a61af66fc99e Initial load duke parents: diff changeset	259 // been filled, the destination_count should be set to the completed value
a61af66fc99e Initial load duke parents: diff changeset	260 // (dc_completed).
a61af66fc99e Initial load duke parents: diff changeset	261 inline uint destination_count() const;
a61af66fc99e Initial load duke parents: diff changeset	262 inline uint destination_count_raw() const;
a61af66fc99e Initial load duke parents: diff changeset	263
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	264 // The location of the java heap data that corresponds to this region.
0 a61af66fc99e Initial load duke parents: diff changeset	265 inline HeapWord* data_location() const;
a61af66fc99e Initial load duke parents: diff changeset	266
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	267 // The highest address referenced by objects in this region.
0 a61af66fc99e Initial load duke parents: diff changeset	268 inline HeapWord* highest_ref() const;
a61af66fc99e Initial load duke parents: diff changeset	269
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	270 // Whether this region is available to be claimed, has been claimed, or has
0 a61af66fc99e Initial load duke parents: diff changeset	271 // been completed.
a61af66fc99e Initial load duke parents: diff changeset	272 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	273 // Minor subtlety: claimed() returns true if the region is marked
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	274 // completed(), which is desirable since a region must be claimed before it
0 a61af66fc99e Initial load duke parents: diff changeset	275 // can be completed.
a61af66fc99e Initial load duke parents: diff changeset	276 bool available() const { return _dc_and_los < dc_one; }
a61af66fc99e Initial load duke parents: diff changeset	277 bool claimed() const { return _dc_and_los >= dc_claimed; }
a61af66fc99e Initial load duke parents: diff changeset	278 bool completed() const { return _dc_and_los >= dc_completed; }
a61af66fc99e Initial load duke parents: diff changeset	279
a61af66fc99e Initial load duke parents: diff changeset	280 // These are not atomic.
a61af66fc99e Initial load duke parents: diff changeset	281 void set_destination(HeapWord* addr) { _destination = addr; }
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	282 void set_source_region(size_t region) { _source_region = region; }
0 a61af66fc99e Initial load duke parents: diff changeset	283 void set_deferred_obj_addr(HeapWord* addr) { _partial_obj_addr = addr; }
a61af66fc99e Initial load duke parents: diff changeset	284 void set_partial_obj_addr(HeapWord* addr) { _partial_obj_addr = addr; }
a61af66fc99e Initial load duke parents: diff changeset	285 void set_partial_obj_size(size_t words) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	286 _partial_obj_size = (region_sz_t) words;
0 a61af66fc99e Initial load duke parents: diff changeset	287 }
a61af66fc99e Initial load duke parents: diff changeset	288
a61af66fc99e Initial load duke parents: diff changeset	289 inline void set_destination_count(uint count);
a61af66fc99e Initial load duke parents: diff changeset	290 inline void set_live_obj_size(size_t words);
a61af66fc99e Initial load duke parents: diff changeset	291 inline void set_data_location(HeapWord* addr);
a61af66fc99e Initial load duke parents: diff changeset	292 inline void set_completed();
a61af66fc99e Initial load duke parents: diff changeset	293 inline bool claim_unsafe();
a61af66fc99e Initial load duke parents: diff changeset	294
a61af66fc99e Initial load duke parents: diff changeset	295 // These are atomic.
a61af66fc99e Initial load duke parents: diff changeset	296 inline void add_live_obj(size_t words);
a61af66fc99e Initial load duke parents: diff changeset	297 inline void set_highest_ref(HeapWord* addr);
a61af66fc99e Initial load duke parents: diff changeset	298 inline void decrement_destination_count();
a61af66fc99e Initial load duke parents: diff changeset	299 inline bool claim();
a61af66fc99e Initial load duke parents: diff changeset	300
a61af66fc99e Initial load duke parents: diff changeset	301 private:
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	302 // The type used to represent object sizes within a region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	303 typedef uint region_sz_t;
0 a61af66fc99e Initial load duke parents: diff changeset	304
a61af66fc99e Initial load duke parents: diff changeset	305 // Constants for manipulating the _dc_and_los field, which holds both the
a61af66fc99e Initial load duke parents: diff changeset	306 // destination count and live obj size. The live obj size lives at the
a61af66fc99e Initial load duke parents: diff changeset	307 // least significant end so no masking is necessary when adding.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	308 static const region_sz_t dc_shift; // Shift amount.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	309 static const region_sz_t dc_mask; // Mask for destination count.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	310 static const region_sz_t dc_one; // 1, shifted appropriately.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	311 static const region_sz_t dc_claimed; // Region has been claimed.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	312 static const region_sz_t dc_completed; // Region has been completed.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	313 static const region_sz_t los_mask; // Mask for live obj size.
0 a61af66fc99e Initial load duke parents: diff changeset	314
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	315 HeapWord* _destination;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	316 size_t _source_region;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	317 HeapWord* _partial_obj_addr;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	318 region_sz_t _partial_obj_size;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	319 region_sz_t volatile _dc_and_los;
0 a61af66fc99e Initial load duke parents: diff changeset	320 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	321 // These enable optimizations that are only partially implemented. Use
a61af66fc99e Initial load duke parents: diff changeset	322 // debug builds to prevent the code fragments from breaking.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	323 HeapWord* _data_location;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	324 HeapWord* _highest_ref;
0 a61af66fc99e Initial load duke parents: diff changeset	325 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	326
a61af66fc99e Initial load duke parents: diff changeset	327 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	328 public:
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	329 uint _pushed; // 0 until region is pushed onto a worker's stack
0 a61af66fc99e Initial load duke parents: diff changeset	330 private:
a61af66fc99e Initial load duke parents: diff changeset	331 #endif
a61af66fc99e Initial load duke parents: diff changeset	332 };
a61af66fc99e Initial load duke parents: diff changeset	333
a61af66fc99e Initial load duke parents: diff changeset	334 public:
a61af66fc99e Initial load duke parents: diff changeset	335 ParallelCompactData();
a61af66fc99e Initial load duke parents: diff changeset	336 bool initialize(MemRegion covered_region);
a61af66fc99e Initial load duke parents: diff changeset	337
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	338 size_t region_count() const { return _region_count; }
0 a61af66fc99e Initial load duke parents: diff changeset	339
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	340 // Convert region indices to/from RegionData pointers.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	341 inline RegionData* region(size_t region_idx) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	342 inline size_t region(const RegionData* const region_ptr) const;
0 a61af66fc99e Initial load duke parents: diff changeset	343
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	344 // Returns true if the given address is contained within the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	345 bool region_contains(size_t region_index, HeapWord* addr);
0 a61af66fc99e Initial load duke parents: diff changeset	346
a61af66fc99e Initial load duke parents: diff changeset	347 void add_obj(HeapWord* addr, size_t len);
a61af66fc99e Initial load duke parents: diff changeset	348 void add_obj(oop p, size_t len) { add_obj((HeapWord*)p, len); }
a61af66fc99e Initial load duke parents: diff changeset	349
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	350 // Fill in the regions covering [beg, end) so that no data moves; i.e., the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	351 // destination of region n is simply the start of region n. The argument beg
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	352 // must be region-aligned; end need not be.
0 a61af66fc99e Initial load duke parents: diff changeset	353 void summarize_dense_prefix(HeapWord* beg, HeapWord* end);
a61af66fc99e Initial load duke parents: diff changeset	354
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	355 HeapWord* summarize_split_space(size_t src_region, SplitInfo& split_info,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	356 HeapWord* destination, HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	357 HeapWord** target_next);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	358 bool summarize(SplitInfo& split_info,
0 a61af66fc99e Initial load duke parents: diff changeset	359 HeapWord* source_beg, HeapWord* source_end,
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	360 HeapWord** source_next,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	361 HeapWord* target_beg, HeapWord* target_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	362 HeapWord** target_next);
0 a61af66fc99e Initial load duke parents: diff changeset	363
a61af66fc99e Initial load duke parents: diff changeset	364 void clear();
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	365 void clear_range(size_t beg_region, size_t end_region);
0 a61af66fc99e Initial load duke parents: diff changeset	366 void clear_range(HeapWord* beg, HeapWord* end) {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	367 clear_range(addr_to_region_idx(beg), addr_to_region_idx(end));
0 a61af66fc99e Initial load duke parents: diff changeset	368 }
a61af66fc99e Initial load duke parents: diff changeset	369
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	370 // Return the number of words between addr and the start of the region
0 a61af66fc99e Initial load duke parents: diff changeset	371 // containing addr.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	372 inline size_t region_offset(const HeapWord* addr) const;
0 a61af66fc99e Initial load duke parents: diff changeset	373
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	374 // Convert addresses to/from a region index or region pointer.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	375 inline size_t addr_to_region_idx(const HeapWord* addr) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	376 inline RegionData* addr_to_region_ptr(const HeapWord* addr) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	377 inline HeapWord* region_to_addr(size_t region) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	378 inline HeapWord* region_to_addr(size_t region, size_t offset) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	379 inline HeapWord* region_to_addr(const RegionData* region) const;
0 a61af66fc99e Initial load duke parents: diff changeset	380
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	381 inline HeapWord* region_align_down(HeapWord* addr) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	382 inline HeapWord* region_align_up(HeapWord* addr) const;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	383 inline bool is_region_aligned(HeapWord* addr) const;
0 a61af66fc99e Initial load duke parents: diff changeset	384
a61af66fc99e Initial load duke parents: diff changeset	385 // Return the address one past the end of the partial object.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	386 HeapWord* partial_obj_end(size_t region_idx) const;
0 a61af66fc99e Initial load duke parents: diff changeset	387
a61af66fc99e Initial load duke parents: diff changeset	388 // Return the new location of the object p after the
a61af66fc99e Initial load duke parents: diff changeset	389 // the compaction.
a61af66fc99e Initial load duke parents: diff changeset	390 HeapWord* calc_new_pointer(HeapWord* addr);
a61af66fc99e Initial load duke parents: diff changeset	391
a61af66fc99e Initial load duke parents: diff changeset	392 HeapWord* calc_new_pointer(oop p) {
a61af66fc99e Initial load duke parents: diff changeset	393 return calc_new_pointer((HeapWord*) p);
a61af66fc99e Initial load duke parents: diff changeset	394 }
a61af66fc99e Initial load duke parents: diff changeset	395
a61af66fc99e Initial load duke parents: diff changeset	396 // Return the updated address for the given klass
a61af66fc99e Initial load duke parents: diff changeset	397 klassOop calc_new_klass(klassOop);
a61af66fc99e Initial load duke parents: diff changeset	398
a61af66fc99e Initial load duke parents: diff changeset	399 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	400 void verify_clear(const PSVirtualSpace* vspace);
a61af66fc99e Initial load duke parents: diff changeset	401 void verify_clear();
a61af66fc99e Initial load duke parents: diff changeset	402 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	403
a61af66fc99e Initial load duke parents: diff changeset	404 private:
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	405 bool initialize_region_data(size_t region_size);
0 a61af66fc99e Initial load duke parents: diff changeset	406 PSVirtualSpace* create_vspace(size_t count, size_t element_size);
a61af66fc99e Initial load duke parents: diff changeset	407
a61af66fc99e Initial load duke parents: diff changeset	408 private:
a61af66fc99e Initial load duke parents: diff changeset	409 HeapWord* _region_start;
a61af66fc99e Initial load duke parents: diff changeset	410 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	411 HeapWord* _region_end;
a61af66fc99e Initial load duke parents: diff changeset	412 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	413
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	414 PSVirtualSpace* _region_vspace;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	415 RegionData* _region_data;
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	416 size_t _region_count;
0 a61af66fc99e Initial load duke parents: diff changeset	417 };
a61af66fc99e Initial load duke parents: diff changeset	418
a61af66fc99e Initial load duke parents: diff changeset	419 inline uint
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	420 ParallelCompactData::RegionData::destination_count_raw() const
0 a61af66fc99e Initial load duke parents: diff changeset	421 {
a61af66fc99e Initial load duke parents: diff changeset	422 return _dc_and_los & dc_mask;
a61af66fc99e Initial load duke parents: diff changeset	423 }
a61af66fc99e Initial load duke parents: diff changeset	424
a61af66fc99e Initial load duke parents: diff changeset	425 inline uint
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	426 ParallelCompactData::RegionData::destination_count() const
0 a61af66fc99e Initial load duke parents: diff changeset	427 {
a61af66fc99e Initial load duke parents: diff changeset	428 return destination_count_raw() >> dc_shift;
a61af66fc99e Initial load duke parents: diff changeset	429 }
a61af66fc99e Initial load duke parents: diff changeset	430
a61af66fc99e Initial load duke parents: diff changeset	431 inline void
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	432 ParallelCompactData::RegionData::set_destination_count(uint count)
0 a61af66fc99e Initial load duke parents: diff changeset	433 {
a61af66fc99e Initial load duke parents: diff changeset	434 assert(count <= (dc_completed >> dc_shift), "count too large");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	435 const region_sz_t live_sz = (region_sz_t) live_obj_size();
0 a61af66fc99e Initial load duke parents: diff changeset	436 _dc_and_los = (count << dc_shift) \| live_sz;
a61af66fc99e Initial load duke parents: diff changeset	437 }
a61af66fc99e Initial load duke parents: diff changeset	438
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	439 inline void ParallelCompactData::RegionData::set_live_obj_size(size_t words)
0 a61af66fc99e Initial load duke parents: diff changeset	440 {
a61af66fc99e Initial load duke parents: diff changeset	441 assert(words <= los_mask, "would overflow");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	442 _dc_and_los = destination_count_raw() \| (region_sz_t)words;
0 a61af66fc99e Initial load duke parents: diff changeset	443 }
a61af66fc99e Initial load duke parents: diff changeset	444
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	445 inline void ParallelCompactData::RegionData::decrement_destination_count()
0 a61af66fc99e Initial load duke parents: diff changeset	446 {
a61af66fc99e Initial load duke parents: diff changeset	447 assert(_dc_and_los < dc_claimed, "already claimed");
a61af66fc99e Initial load duke parents: diff changeset	448 assert(_dc_and_los >= dc_one, "count would go negative");
a61af66fc99e Initial load duke parents: diff changeset	449 Atomic::add((int)dc_mask, (volatile int*)&_dc_and_los);
a61af66fc99e Initial load duke parents: diff changeset	450 }
a61af66fc99e Initial load duke parents: diff changeset	451
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	452 inline HeapWord* ParallelCompactData::RegionData::data_location() const
0 a61af66fc99e Initial load duke parents: diff changeset	453 {
a61af66fc99e Initial load duke parents: diff changeset	454 DEBUG_ONLY(return _data_location;)
a61af66fc99e Initial load duke parents: diff changeset	455 NOT_DEBUG(return NULL;)
a61af66fc99e Initial load duke parents: diff changeset	456 }
a61af66fc99e Initial load duke parents: diff changeset	457
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	458 inline HeapWord* ParallelCompactData::RegionData::highest_ref() const
0 a61af66fc99e Initial load duke parents: diff changeset	459 {
a61af66fc99e Initial load duke parents: diff changeset	460 DEBUG_ONLY(return _highest_ref;)
a61af66fc99e Initial load duke parents: diff changeset	461 NOT_DEBUG(return NULL;)
a61af66fc99e Initial load duke parents: diff changeset	462 }
a61af66fc99e Initial load duke parents: diff changeset	463
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	464 inline void ParallelCompactData::RegionData::set_data_location(HeapWord* addr)
0 a61af66fc99e Initial load duke parents: diff changeset	465 {
a61af66fc99e Initial load duke parents: diff changeset	466 DEBUG_ONLY(_data_location = addr;)
a61af66fc99e Initial load duke parents: diff changeset	467 }
a61af66fc99e Initial load duke parents: diff changeset	468
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	469 inline void ParallelCompactData::RegionData::set_completed()
0 a61af66fc99e Initial load duke parents: diff changeset	470 {
a61af66fc99e Initial load duke parents: diff changeset	471 assert(claimed(), "must be claimed first");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	472 _dc_and_los = dc_completed \| (region_sz_t) live_obj_size();
0 a61af66fc99e Initial load duke parents: diff changeset	473 }
a61af66fc99e Initial load duke parents: diff changeset	474
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	475 // MT-unsafe claiming of a region. Should only be used during single threaded
0 a61af66fc99e Initial load duke parents: diff changeset	476 // execution.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	477 inline bool ParallelCompactData::RegionData::claim_unsafe()
0 a61af66fc99e Initial load duke parents: diff changeset	478 {
a61af66fc99e Initial load duke parents: diff changeset	479 if (available()) {
a61af66fc99e Initial load duke parents: diff changeset	480 _dc_and_los \|= dc_claimed;
a61af66fc99e Initial load duke parents: diff changeset	481 return true;
a61af66fc99e Initial load duke parents: diff changeset	482 }
a61af66fc99e Initial load duke parents: diff changeset	483 return false;
a61af66fc99e Initial load duke parents: diff changeset	484 }
a61af66fc99e Initial load duke parents: diff changeset	485
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	486 inline void ParallelCompactData::RegionData::add_live_obj(size_t words)
0 a61af66fc99e Initial load duke parents: diff changeset	487 {
a61af66fc99e Initial load duke parents: diff changeset	488 assert(words <= (size_t)los_mask - live_obj_size(), "overflow");
a61af66fc99e Initial load duke parents: diff changeset	489 Atomic::add((int) words, (volatile int*) &_dc_and_los);
a61af66fc99e Initial load duke parents: diff changeset	490 }
a61af66fc99e Initial load duke parents: diff changeset	491
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	492 inline void ParallelCompactData::RegionData::set_highest_ref(HeapWord* addr)
0 a61af66fc99e Initial load duke parents: diff changeset	493 {
a61af66fc99e Initial load duke parents: diff changeset	494 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	495 HeapWord* tmp = _highest_ref;
a61af66fc99e Initial load duke parents: diff changeset	496 while (addr > tmp) {
a61af66fc99e Initial load duke parents: diff changeset	497 tmp = (HeapWord*)Atomic::cmpxchg_ptr(addr, &_highest_ref, tmp);
a61af66fc99e Initial load duke parents: diff changeset	498 }
a61af66fc99e Initial load duke parents: diff changeset	499 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	500 }
a61af66fc99e Initial load duke parents: diff changeset	501
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	502 inline bool ParallelCompactData::RegionData::claim()
0 a61af66fc99e Initial load duke parents: diff changeset	503 {
a61af66fc99e Initial load duke parents: diff changeset	504 const int los = (int) live_obj_size();
a61af66fc99e Initial load duke parents: diff changeset	505 const int old = Atomic::cmpxchg(dc_claimed \| los,
a61af66fc99e Initial load duke parents: diff changeset	506 (volatile int*) &_dc_and_los, los);
a61af66fc99e Initial load duke parents: diff changeset	507 return old == los;
a61af66fc99e Initial load duke parents: diff changeset	508 }
a61af66fc99e Initial load duke parents: diff changeset	509
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	510 inline ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	511 ParallelCompactData::region(size_t region_idx) const
0 a61af66fc99e Initial load duke parents: diff changeset	512 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	513 assert(region_idx <= region_count(), "bad arg");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	514 return _region_data + region_idx;
0 a61af66fc99e Initial load duke parents: diff changeset	515 }
a61af66fc99e Initial load duke parents: diff changeset	516
a61af66fc99e Initial load duke parents: diff changeset	517 inline size_t
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	518 ParallelCompactData::region(const RegionData* const region_ptr) const
0 a61af66fc99e Initial load duke parents: diff changeset	519 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	520 assert(region_ptr >= _region_data, "bad arg");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	521 assert(region_ptr <= _region_data + region_count(), "bad arg");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	522 return pointer_delta(region_ptr, _region_data, sizeof(RegionData));
0 a61af66fc99e Initial load duke parents: diff changeset	523 }
a61af66fc99e Initial load duke parents: diff changeset	524
a61af66fc99e Initial load duke parents: diff changeset	525 inline size_t
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	526 ParallelCompactData::region_offset(const HeapWord* addr) const
0 a61af66fc99e Initial load duke parents: diff changeset	527 {
a61af66fc99e Initial load duke parents: diff changeset	528 assert(addr >= _region_start, "bad addr");
a61af66fc99e Initial load duke parents: diff changeset	529 assert(addr <= _region_end, "bad addr");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	530 return (size_t(addr) & RegionAddrOffsetMask) >> LogHeapWordSize;
0 a61af66fc99e Initial load duke parents: diff changeset	531 }
a61af66fc99e Initial load duke parents: diff changeset	532
a61af66fc99e Initial load duke parents: diff changeset	533 inline size_t
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	534 ParallelCompactData::addr_to_region_idx(const HeapWord* addr) const
0 a61af66fc99e Initial load duke parents: diff changeset	535 {
a61af66fc99e Initial load duke parents: diff changeset	536 assert(addr >= _region_start, "bad addr");
a61af66fc99e Initial load duke parents: diff changeset	537 assert(addr <= _region_end, "bad addr");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	538 return pointer_delta(addr, _region_start) >> Log2RegionSize;
0 a61af66fc99e Initial load duke parents: diff changeset	539 }
a61af66fc99e Initial load duke parents: diff changeset	540
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	541 inline ParallelCompactData::RegionData*
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	542 ParallelCompactData::addr_to_region_ptr(const HeapWord* addr) const
0 a61af66fc99e Initial load duke parents: diff changeset	543 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	544 return region(addr_to_region_idx(addr));
0 a61af66fc99e Initial load duke parents: diff changeset	545 }
a61af66fc99e Initial load duke parents: diff changeset	546
a61af66fc99e Initial load duke parents: diff changeset	547 inline HeapWord*
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	548 ParallelCompactData::region_to_addr(size_t region) const
0 a61af66fc99e Initial load duke parents: diff changeset	549 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	550 assert(region <= _region_count, "region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	551 return _region_start + (region << Log2RegionSize);
0 a61af66fc99e Initial load duke parents: diff changeset	552 }
a61af66fc99e Initial load duke parents: diff changeset	553
a61af66fc99e Initial load duke parents: diff changeset	554 inline HeapWord*
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	555 ParallelCompactData::region_to_addr(const RegionData* region) const
0 a61af66fc99e Initial load duke parents: diff changeset	556 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	557 return region_to_addr(pointer_delta(region, _region_data,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	558 sizeof(RegionData)));
0 a61af66fc99e Initial load duke parents: diff changeset	559 }
a61af66fc99e Initial load duke parents: diff changeset	560
a61af66fc99e Initial load duke parents: diff changeset	561 inline HeapWord*
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	562 ParallelCompactData::region_to_addr(size_t region, size_t offset) const
0 a61af66fc99e Initial load duke parents: diff changeset	563 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	564 assert(region <= _region_count, "region out of range");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	565 assert(offset < RegionSize, "offset too big"); // This may be too strict.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	566 return region_to_addr(region) + offset;
0 a61af66fc99e Initial load duke parents: diff changeset	567 }
a61af66fc99e Initial load duke parents: diff changeset	568
a61af66fc99e Initial load duke parents: diff changeset	569 inline HeapWord*
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	570 ParallelCompactData::region_align_down(HeapWord* addr) const
0 a61af66fc99e Initial load duke parents: diff changeset	571 {
a61af66fc99e Initial load duke parents: diff changeset	572 assert(addr >= _region_start, "bad addr");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	573 assert(addr < _region_end + RegionSize, "bad addr");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	574 return (HeapWord*)(size_t(addr) & RegionAddrMask);
0 a61af66fc99e Initial load duke parents: diff changeset	575 }
a61af66fc99e Initial load duke parents: diff changeset	576
a61af66fc99e Initial load duke parents: diff changeset	577 inline HeapWord*
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	578 ParallelCompactData::region_align_up(HeapWord* addr) const
0 a61af66fc99e Initial load duke parents: diff changeset	579 {
a61af66fc99e Initial load duke parents: diff changeset	580 assert(addr >= _region_start, "bad addr");
a61af66fc99e Initial load duke parents: diff changeset	581 assert(addr <= _region_end, "bad addr");
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	582 return region_align_down(addr + RegionSizeOffsetMask);
0 a61af66fc99e Initial load duke parents: diff changeset	583 }
a61af66fc99e Initial load duke parents: diff changeset	584
a61af66fc99e Initial load duke parents: diff changeset	585 inline bool
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	586 ParallelCompactData::is_region_aligned(HeapWord* addr) const
0 a61af66fc99e Initial load duke parents: diff changeset	587 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	588 return region_offset(addr) == 0;
0 a61af66fc99e Initial load duke parents: diff changeset	589 }
a61af66fc99e Initial load duke parents: diff changeset	590
a61af66fc99e Initial load duke parents: diff changeset	591 // Abstract closure for use with ParMarkBitMap::iterate(), which will invoke the
a61af66fc99e Initial load duke parents: diff changeset	592 // do_addr() method.
a61af66fc99e Initial load duke parents: diff changeset	593 //
a61af66fc99e Initial load duke parents: diff changeset	594 // The closure is initialized with the number of heap words to process
a61af66fc99e Initial load duke parents: diff changeset	595 // (words_remaining()), and becomes 'full' when it reaches 0. The do_addr()
a61af66fc99e Initial load duke parents: diff changeset	596 // methods in subclasses should update the total as words are processed. Since
a61af66fc99e Initial load duke parents: diff changeset	597 // only one subclass actually uses this mechanism to terminate iteration, the
a61af66fc99e Initial load duke parents: diff changeset	598 // default initial value is > 0. The implementation is here and not in the
a61af66fc99e Initial load duke parents: diff changeset	599 // single subclass that uses it to avoid making is_full() virtual, and thus
a61af66fc99e Initial load duke parents: diff changeset	600 // adding a virtual call per live object.
a61af66fc99e Initial load duke parents: diff changeset	601
a61af66fc99e Initial load duke parents: diff changeset	602 class ParMarkBitMapClosure: public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	603 public:
a61af66fc99e Initial load duke parents: diff changeset	604 typedef ParMarkBitMap::idx_t idx_t;
a61af66fc99e Initial load duke parents: diff changeset	605 typedef ParMarkBitMap::IterationStatus IterationStatus;
a61af66fc99e Initial load duke parents: diff changeset	606
a61af66fc99e Initial load duke parents: diff changeset	607 public:
a61af66fc99e Initial load duke parents: diff changeset	608 inline ParMarkBitMapClosure(ParMarkBitMap* mbm, ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	609 size_t words = max_uintx);
a61af66fc99e Initial load duke parents: diff changeset	610
a61af66fc99e Initial load duke parents: diff changeset	611 inline ParCompactionManager* compaction_manager() const;
a61af66fc99e Initial load duke parents: diff changeset	612 inline ParMarkBitMap* bitmap() const;
a61af66fc99e Initial load duke parents: diff changeset	613 inline size_t words_remaining() const;
a61af66fc99e Initial load duke parents: diff changeset	614 inline bool is_full() const;
a61af66fc99e Initial load duke parents: diff changeset	615 inline HeapWord* source() const;
a61af66fc99e Initial load duke parents: diff changeset	616
a61af66fc99e Initial load duke parents: diff changeset	617 inline void set_source(HeapWord* addr);
a61af66fc99e Initial load duke parents: diff changeset	618
a61af66fc99e Initial load duke parents: diff changeset	619 virtual IterationStatus do_addr(HeapWord* addr, size_t words) = 0;
a61af66fc99e Initial load duke parents: diff changeset	620
a61af66fc99e Initial load duke parents: diff changeset	621 protected:
a61af66fc99e Initial load duke parents: diff changeset	622 inline void decrement_words_remaining(size_t words);
a61af66fc99e Initial load duke parents: diff changeset	623
a61af66fc99e Initial load duke parents: diff changeset	624 private:
a61af66fc99e Initial load duke parents: diff changeset	625 ParMarkBitMap* const _bitmap;
a61af66fc99e Initial load duke parents: diff changeset	626 ParCompactionManager* const _compaction_manager;
a61af66fc99e Initial load duke parents: diff changeset	627 DEBUG_ONLY(const size_t _initial_words_remaining;) // Useful in debugger.
a61af66fc99e Initial load duke parents: diff changeset	628 size_t _words_remaining; // Words left to copy.
a61af66fc99e Initial load duke parents: diff changeset	629
a61af66fc99e Initial load duke parents: diff changeset	630 protected:
a61af66fc99e Initial load duke parents: diff changeset	631 HeapWord* _source; // Next addr that would be read.
a61af66fc99e Initial load duke parents: diff changeset	632 };
a61af66fc99e Initial load duke parents: diff changeset	633
a61af66fc99e Initial load duke parents: diff changeset	634 inline
a61af66fc99e Initial load duke parents: diff changeset	635 ParMarkBitMapClosure::ParMarkBitMapClosure(ParMarkBitMap* bitmap,
a61af66fc99e Initial load duke parents: diff changeset	636 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	637 size_t words):
a61af66fc99e Initial load duke parents: diff changeset	638 _bitmap(bitmap), _compaction_manager(cm)
a61af66fc99e Initial load duke parents: diff changeset	639 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	640 , _initial_words_remaining(words)
a61af66fc99e Initial load duke parents: diff changeset	641 #endif
a61af66fc99e Initial load duke parents: diff changeset	642 {
a61af66fc99e Initial load duke parents: diff changeset	643 _words_remaining = words;
a61af66fc99e Initial load duke parents: diff changeset	644 _source = NULL;
a61af66fc99e Initial load duke parents: diff changeset	645 }
a61af66fc99e Initial load duke parents: diff changeset	646
a61af66fc99e Initial load duke parents: diff changeset	647 inline ParCompactionManager* ParMarkBitMapClosure::compaction_manager() const {
a61af66fc99e Initial load duke parents: diff changeset	648 return _compaction_manager;
a61af66fc99e Initial load duke parents: diff changeset	649 }
a61af66fc99e Initial load duke parents: diff changeset	650
a61af66fc99e Initial load duke parents: diff changeset	651 inline ParMarkBitMap* ParMarkBitMapClosure::bitmap() const {
a61af66fc99e Initial load duke parents: diff changeset	652 return _bitmap;
a61af66fc99e Initial load duke parents: diff changeset	653 }
a61af66fc99e Initial load duke parents: diff changeset	654
a61af66fc99e Initial load duke parents: diff changeset	655 inline size_t ParMarkBitMapClosure::words_remaining() const {
a61af66fc99e Initial load duke parents: diff changeset	656 return _words_remaining;
a61af66fc99e Initial load duke parents: diff changeset	657 }
a61af66fc99e Initial load duke parents: diff changeset	658
a61af66fc99e Initial load duke parents: diff changeset	659 inline bool ParMarkBitMapClosure::is_full() const {
a61af66fc99e Initial load duke parents: diff changeset	660 return words_remaining() == 0;
a61af66fc99e Initial load duke parents: diff changeset	661 }
a61af66fc99e Initial load duke parents: diff changeset	662
a61af66fc99e Initial load duke parents: diff changeset	663 inline HeapWord* ParMarkBitMapClosure::source() const {
a61af66fc99e Initial load duke parents: diff changeset	664 return _source;
a61af66fc99e Initial load duke parents: diff changeset	665 }
a61af66fc99e Initial load duke parents: diff changeset	666
a61af66fc99e Initial load duke parents: diff changeset	667 inline void ParMarkBitMapClosure::set_source(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	668 _source = addr;
a61af66fc99e Initial load duke parents: diff changeset	669 }
a61af66fc99e Initial load duke parents: diff changeset	670
a61af66fc99e Initial load duke parents: diff changeset	671 inline void ParMarkBitMapClosure::decrement_words_remaining(size_t words) {
a61af66fc99e Initial load duke parents: diff changeset	672 assert(_words_remaining >= words, "processed too many words");
a61af66fc99e Initial load duke parents: diff changeset	673 _words_remaining -= words;
a61af66fc99e Initial load duke parents: diff changeset	674 }
a61af66fc99e Initial load duke parents: diff changeset	675
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	676 // The UseParallelOldGC collector is a stop-the-world garbage collector that
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	677 // does parts of the collection using parallel threads. The collection includes
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	678 // the tenured generation and the young generation. The permanent generation is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	679 // collected at the same time as the other two generations but the permanent
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	680 // generation is collect by a single GC thread. The permanent generation is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	681 // collected serially because of the requirement that during the processing of a
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	682 // klass AAA, any objects reference by AAA must already have been processed.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	683 // This requirement is enforced by a left (lower address) to right (higher
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	684 // address) sliding compaction.
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	685 //
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	686 // There are four phases of the collection.
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	687 //
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	688 // - marking phase
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	689 // - summary phase
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	690 // - compacting phase
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	691 // - clean up phase
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	692 //
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	693 // Roughly speaking these phases correspond, respectively, to
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	694 // - mark all the live objects
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	695 // - calculate the destination of each object at the end of the collection
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	696 // - move the objects to their destination
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	697 // - update some references and reinitialize some variables
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	698 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	699 // These three phases are invoked in PSParallelCompact::invoke_no_policy(). The
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	700 // marking phase is implemented in PSParallelCompact::marking_phase() and does a
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	701 // complete marking of the heap. The summary phase is implemented in
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	702 // PSParallelCompact::summary_phase(). The move and update phase is implemented
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	703 // in PSParallelCompact::compact().
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	704 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	705 // A space that is being collected is divided into regions and with each region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	706 // is associated an object of type ParallelCompactData. Each region is of a
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	707 // fixed size and typically will contain more than 1 object and may have parts
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	708 // of objects at the front and back of the region.
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	709 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	710 // region -----+---------------------+----------
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	711 // objects covered [ AAA )[ BBB )[ CCC )[ DDD )
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	712 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	713 // The marking phase does a complete marking of all live objects in the heap.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	714 // The marking also compiles the size of the data for all live objects covered
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	715 // by the region. This size includes the part of any live object spanning onto
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	716 // the region (part of AAA if it is live) from the front, all live objects
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	717 // contained in the region (BBB and/or CCC if they are live), and the part of
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	718 // any live objects covered by the region that extends off the region (part of
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	719 // DDD if it is live). The marking phase uses multiple GC threads and marking
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	720 // is done in a bit array of type ParMarkBitMap. The marking of the bit map is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	721 // done atomically as is the accumulation of the size of the live objects
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	722 // covered by a region.
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	723 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	724 // The summary phase calculates the total live data to the left of each region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	725 // XXX. Based on that total and the bottom of the space, it can calculate the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	726 // starting location of the live data in XXX. The summary phase calculates for
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	727 // each region XXX quantites such as
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	728 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	729 // - the amount of live data at the beginning of a region from an object
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	730 // entering the region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	731 // - the location of the first live data on the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	732 // - a count of the number of regions receiving live data from XXX.
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	733 //
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	734 // See ParallelCompactData for precise details. The summary phase also
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	735 // calculates the dense prefix for the compaction. The dense prefix is a
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	736 // portion at the beginning of the space that is not moved. The objects in the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	737 // dense prefix do need to have their object references updated. See method
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	738 // summarize_dense_prefix().
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	739 //
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	740 // The summary phase is done using 1 GC thread.
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	741 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	742 // The compaction phase moves objects to their new location and updates all
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	743 // references in the object.
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	744 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	745 // A current exception is that objects that cross a region boundary are moved
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	746 // but do not have their references updated. References are not updated because
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	747 // it cannot easily be determined if the klass pointer KKK for the object AAA
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	748 // has been updated. KKK likely resides in a region to the left of the region
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	749 // containing AAA. These AAA's have there references updated at the end in a
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	750 // clean up phase. See the method PSParallelCompact::update_deferred_objects().
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	751 // An alternate strategy is being investigated for this deferral of updating.
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 113 diff changeset	752 //
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	753 // Compaction is done on a region basis. A region that is ready to be filled is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	754 // put on a ready list and GC threads take region off the list and fill them. A
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	755 // region is ready to be filled if it empty of live objects. Such a region may
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	756 // have been initially empty (only contained dead objects) or may have had all
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	757 // its live objects copied out already. A region that compacts into itself is
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	758 // also ready for filling. The ready list is initially filled with empty
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	759 // regions and regions compacting into themselves. There is always at least 1
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	760 // region that can be put on the ready list. The regions are atomically added
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	761 // and removed from the ready list.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	762
0 a61af66fc99e Initial load duke parents: diff changeset	763 class PSParallelCompact : AllStatic {
a61af66fc99e Initial load duke parents: diff changeset	764 public:
a61af66fc99e Initial load duke parents: diff changeset	765 // Convenient access to type names.
a61af66fc99e Initial load duke parents: diff changeset	766 typedef ParMarkBitMap::idx_t idx_t;
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	767 typedef ParallelCompactData::RegionData RegionData;
0 a61af66fc99e Initial load duke parents: diff changeset	768
a61af66fc99e Initial load duke parents: diff changeset	769 typedef enum {
a61af66fc99e Initial load duke parents: diff changeset	770 perm_space_id, old_space_id, eden_space_id,
a61af66fc99e Initial load duke parents: diff changeset	771 from_space_id, to_space_id, last_space_id
a61af66fc99e Initial load duke parents: diff changeset	772 } SpaceId;
a61af66fc99e Initial load duke parents: diff changeset	773
a61af66fc99e Initial load duke parents: diff changeset	774 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	775 // Inline closure decls
0 a61af66fc99e Initial load duke parents: diff changeset	776 //
a61af66fc99e Initial load duke parents: diff changeset	777 class IsAliveClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	778 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	779 virtual void do_object(oop p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	780 virtual bool do_object_b(oop p);
0 a61af66fc99e Initial load duke parents: diff changeset	781 };
a61af66fc99e Initial load duke parents: diff changeset	782
a61af66fc99e Initial load duke parents: diff changeset	783 class KeepAliveClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	784 private:
0 a61af66fc99e Initial load duke parents: diff changeset	785 ParCompactionManager* _compaction_manager;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	786 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	787 template <class T> inline void do_oop_work(T* p);
0 a61af66fc99e Initial load duke parents: diff changeset	788 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	789 KeepAliveClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	790 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	791 virtual void do_oop(narrowOop* p);
0 a61af66fc99e Initial load duke parents: diff changeset	792 };
a61af66fc99e Initial load duke parents: diff changeset	793
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	794 // Current unused
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	795 class FollowRootClosure: public OopsInGenClosure {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	796 private:
0 a61af66fc99e Initial load duke parents: diff changeset	797 ParCompactionManager* _compaction_manager;
a61af66fc99e Initial load duke parents: diff changeset	798 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	799 FollowRootClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	800 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	801 virtual void do_oop(narrowOop* p);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	802 };
0 a61af66fc99e Initial load duke parents: diff changeset	803
a61af66fc99e Initial load duke parents: diff changeset	804 class FollowStackClosure: public VoidClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	805 private:
0 a61af66fc99e Initial load duke parents: diff changeset	806 ParCompactionManager* _compaction_manager;
a61af66fc99e Initial load duke parents: diff changeset	807 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	808 FollowStackClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	809 virtual void do_void();
0 a61af66fc99e Initial load duke parents: diff changeset	810 };
a61af66fc99e Initial load duke parents: diff changeset	811
a61af66fc99e Initial load duke parents: diff changeset	812 class AdjustPointerClosure: public OopsInGenClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	813 private:
0 a61af66fc99e Initial load duke parents: diff changeset	814 bool _is_root;
a61af66fc99e Initial load duke parents: diff changeset	815 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	816 AdjustPointerClosure(bool is_root) : _is_root(is_root) { }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	817 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	818 virtual void do_oop(narrowOop* p);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	819 // do not walk from thread stacks to the code cache on this phase
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	820 virtual void do_code_blob(CodeBlob* cb) const { }
0 a61af66fc99e Initial load duke parents: diff changeset	821 };
a61af66fc99e Initial load duke parents: diff changeset	822
a61af66fc99e Initial load duke parents: diff changeset	823 // Closure for verifying update of pointers. Does not
a61af66fc99e Initial load duke parents: diff changeset	824 // have any side effects.
a61af66fc99e Initial load duke parents: diff changeset	825 class VerifyUpdateClosure: public ParMarkBitMapClosure {
a61af66fc99e Initial load duke parents: diff changeset	826 const MutableSpace* _space; // Is this ever used?
a61af66fc99e Initial load duke parents: diff changeset	827
a61af66fc99e Initial load duke parents: diff changeset	828 public:
a61af66fc99e Initial load duke parents: diff changeset	829 VerifyUpdateClosure(ParCompactionManager* cm, const MutableSpace* sp) :
a61af66fc99e Initial load duke parents: diff changeset	830 ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm), _space(sp)
a61af66fc99e Initial load duke parents: diff changeset	831 { }
a61af66fc99e Initial load duke parents: diff changeset	832
a61af66fc99e Initial load duke parents: diff changeset	833 virtual IterationStatus do_addr(HeapWord* addr, size_t words);
a61af66fc99e Initial load duke parents: diff changeset	834
a61af66fc99e Initial load duke parents: diff changeset	835 const MutableSpace* space() { return _space; }
a61af66fc99e Initial load duke parents: diff changeset	836 };
a61af66fc99e Initial load duke parents: diff changeset	837
a61af66fc99e Initial load duke parents: diff changeset	838 // Closure for updating objects altered for debug checking
a61af66fc99e Initial load duke parents: diff changeset	839 class ResetObjectsClosure: public ParMarkBitMapClosure {
a61af66fc99e Initial load duke parents: diff changeset	840 public:
a61af66fc99e Initial load duke parents: diff changeset	841 ResetObjectsClosure(ParCompactionManager* cm):
a61af66fc99e Initial load duke parents: diff changeset	842 ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm)
a61af66fc99e Initial load duke parents: diff changeset	843 { }
a61af66fc99e Initial load duke parents: diff changeset	844
a61af66fc99e Initial load duke parents: diff changeset	845 virtual IterationStatus do_addr(HeapWord* addr, size_t words);
a61af66fc99e Initial load duke parents: diff changeset	846 };
a61af66fc99e Initial load duke parents: diff changeset	847
a61af66fc99e Initial load duke parents: diff changeset	848 friend class KeepAliveClosure;
a61af66fc99e Initial load duke parents: diff changeset	849 friend class FollowStackClosure;
a61af66fc99e Initial load duke parents: diff changeset	850 friend class AdjustPointerClosure;
a61af66fc99e Initial load duke parents: diff changeset	851 friend class FollowRootClosure;
a61af66fc99e Initial load duke parents: diff changeset	852 friend class instanceKlassKlass;
a61af66fc99e Initial load duke parents: diff changeset	853 friend class RefProcTaskProxy;
a61af66fc99e Initial load duke parents: diff changeset	854
a61af66fc99e Initial load duke parents: diff changeset	855 private:
a61af66fc99e Initial load duke parents: diff changeset	856 static elapsedTimer _accumulated_time;
a61af66fc99e Initial load duke parents: diff changeset	857 static unsigned int _total_invocations;
a61af66fc99e Initial load duke parents: diff changeset	858 static unsigned int _maximum_compaction_gc_num;
a61af66fc99e Initial load duke parents: diff changeset	859 static jlong _time_of_last_gc; // ms
a61af66fc99e Initial load duke parents: diff changeset	860 static CollectorCounters* _counters;
a61af66fc99e Initial load duke parents: diff changeset	861 static ParMarkBitMap _mark_bitmap;
a61af66fc99e Initial load duke parents: diff changeset	862 static ParallelCompactData _summary_data;
a61af66fc99e Initial load duke parents: diff changeset	863 static IsAliveClosure _is_alive_closure;
a61af66fc99e Initial load duke parents: diff changeset	864 static SpaceInfo _space_info[last_space_id];
a61af66fc99e Initial load duke parents: diff changeset	865 static bool _print_phases;
a61af66fc99e Initial load duke parents: diff changeset	866 static AdjustPointerClosure _adjust_root_pointer_closure;
a61af66fc99e Initial load duke parents: diff changeset	867 static AdjustPointerClosure _adjust_pointer_closure;
a61af66fc99e Initial load duke parents: diff changeset	868
a61af66fc99e Initial load duke parents: diff changeset	869 // Reference processing (used in ...follow_contents)
a61af66fc99e Initial load duke parents: diff changeset	870 static ReferenceProcessor* _ref_processor;
a61af66fc99e Initial load duke parents: diff changeset	871
a61af66fc99e Initial load duke parents: diff changeset	872 // Updated location of intArrayKlassObj.
a61af66fc99e Initial load duke parents: diff changeset	873 static klassOop _updated_int_array_klass_obj;
a61af66fc99e Initial load duke parents: diff changeset	874
a61af66fc99e Initial load duke parents: diff changeset	875 // Values computed at initialization and used by dead_wood_limiter().
a61af66fc99e Initial load duke parents: diff changeset	876 static double _dwl_mean;
a61af66fc99e Initial load duke parents: diff changeset	877 static double _dwl_std_dev;
a61af66fc99e Initial load duke parents: diff changeset	878 static double _dwl_first_term;
a61af66fc99e Initial load duke parents: diff changeset	879 static double _dwl_adjustment;
a61af66fc99e Initial load duke parents: diff changeset	880 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	881 static bool _dwl_initialized;
a61af66fc99e Initial load duke parents: diff changeset	882 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	883
a61af66fc99e Initial load duke parents: diff changeset	884 private:
a61af66fc99e Initial load duke parents: diff changeset	885 // Closure accessors
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	886 static OopClosure* adjust_pointer_closure() { return (OopClosure*)&_adjust_pointer_closure; }
0 a61af66fc99e Initial load duke parents: diff changeset	887 static OopClosure* adjust_root_pointer_closure() { return (OopClosure*)&_adjust_root_pointer_closure; }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	888 static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&_is_alive_closure; }
0 a61af66fc99e Initial load duke parents: diff changeset	889
a61af66fc99e Initial load duke parents: diff changeset	890 static void initialize_space_info();
a61af66fc99e Initial load duke parents: diff changeset	891
a61af66fc99e Initial load duke parents: diff changeset	892 // Return true if details about individual phases should be printed.
a61af66fc99e Initial load duke parents: diff changeset	893 static inline bool print_phases();
a61af66fc99e Initial load duke parents: diff changeset	894
a61af66fc99e Initial load duke parents: diff changeset	895 // Clear the marking bitmap and summary data that cover the specified space.
a61af66fc99e Initial load duke parents: diff changeset	896 static void clear_data_covering_space(SpaceId id);
a61af66fc99e Initial load duke parents: diff changeset	897
a61af66fc99e Initial load duke parents: diff changeset	898 static void pre_compact(PreGCValues* pre_gc_values);
a61af66fc99e Initial load duke parents: diff changeset	899 static void post_compact();
a61af66fc99e Initial load duke parents: diff changeset	900
a61af66fc99e Initial load duke parents: diff changeset	901 // Mark live objects
a61af66fc99e Initial load duke parents: diff changeset	902 static void marking_phase(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	903 bool maximum_heap_compaction);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 579 diff changeset	904 static void follow_weak_klass_links();
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 579 diff changeset	905 static void follow_mdo_weak_refs();
0 a61af66fc99e Initial load duke parents: diff changeset	906
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	907 template <class T> static inline void adjust_pointer(T* p, bool is_root);
0 a61af66fc99e Initial load duke parents: diff changeset	908 static void adjust_root_pointer(oop* p) { adjust_pointer(p, true); }
a61af66fc99e Initial load duke parents: diff changeset	909
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	910 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	911 static inline void follow_root(ParCompactionManager* cm, T* p);
0 a61af66fc99e Initial load duke parents: diff changeset	912
a61af66fc99e Initial load duke parents: diff changeset	913 // Compute the dense prefix for the designated space. This is an experimental
a61af66fc99e Initial load duke parents: diff changeset	914 // implementation currently not used in production.
a61af66fc99e Initial load duke parents: diff changeset	915 static HeapWord* compute_dense_prefix_via_density(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	916 bool maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	917
a61af66fc99e Initial load duke parents: diff changeset	918 // Methods used to compute the dense prefix.
a61af66fc99e Initial load duke parents: diff changeset	919
a61af66fc99e Initial load duke parents: diff changeset	920 // Compute the value of the normal distribution at x = density. The mean and
a61af66fc99e Initial load duke parents: diff changeset	921 // standard deviation are values saved by initialize_dead_wood_limiter().
a61af66fc99e Initial load duke parents: diff changeset	922 static inline double normal_distribution(double density);
a61af66fc99e Initial load duke parents: diff changeset	923
a61af66fc99e Initial load duke parents: diff changeset	924 // Initialize the static vars used by dead_wood_limiter().
a61af66fc99e Initial load duke parents: diff changeset	925 static void initialize_dead_wood_limiter();
a61af66fc99e Initial load duke parents: diff changeset	926
a61af66fc99e Initial load duke parents: diff changeset	927 // Return the percentage of space that can be treated as "dead wood" (i.e.,
a61af66fc99e Initial load duke parents: diff changeset	928 // not reclaimed).
a61af66fc99e Initial load duke parents: diff changeset	929 static double dead_wood_limiter(double density, size_t min_percent);
a61af66fc99e Initial load duke parents: diff changeset	930
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	931 // Find the first (left-most) region in the range [beg, end) that has at least
0 a61af66fc99e Initial load duke parents: diff changeset	932 // dead_words of dead space to the left. The argument beg must be the first
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	933 // region in the space that is not completely live.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	934 static RegionData* dead_wood_limit_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	935 const RegionData* end,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	936 size_t dead_words);
0 a61af66fc99e Initial load duke parents: diff changeset	937
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	938 // Return a pointer to the first region in the range [beg, end) that is not
0 a61af66fc99e Initial load duke parents: diff changeset	939 // completely full.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	940 static RegionData* first_dead_space_region(const RegionData* beg,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	941 const RegionData* end);
0 a61af66fc99e Initial load duke parents: diff changeset	942
a61af66fc99e Initial load duke parents: diff changeset	943 // Return a value indicating the benefit or 'yield' if the compacted region
a61af66fc99e Initial load duke parents: diff changeset	944 // were to start (or equivalently if the dense prefix were to end) at the
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	945 // candidate region. Higher values are better.
0 a61af66fc99e Initial load duke parents: diff changeset	946 //
a61af66fc99e Initial load duke parents: diff changeset	947 // The value is based on the amount of space reclaimed vs. the costs of (a)
a61af66fc99e Initial load duke parents: diff changeset	948 // updating references in the dense prefix plus (b) copying objects and
a61af66fc99e Initial load duke parents: diff changeset	949 // updating references in the compacted region.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	950 static inline double reclaimed_ratio(const RegionData* const candidate,
0 a61af66fc99e Initial load duke parents: diff changeset	951 HeapWord* const bottom,
a61af66fc99e Initial load duke parents: diff changeset	952 HeapWord* const top,
a61af66fc99e Initial load duke parents: diff changeset	953 HeapWord* const new_top);
a61af66fc99e Initial load duke parents: diff changeset	954
a61af66fc99e Initial load duke parents: diff changeset	955 // Compute the dense prefix for the designated space.
a61af66fc99e Initial load duke parents: diff changeset	956 static HeapWord* compute_dense_prefix(const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	957 bool maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	958
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	959 // Return true if dead space crosses onto the specified Region; bit must be
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	960 // the bit index corresponding to the first word of the Region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	961 static inline bool dead_space_crosses_boundary(const RegionData* region,
0 a61af66fc99e Initial load duke parents: diff changeset	962 idx_t bit);
a61af66fc99e Initial load duke parents: diff changeset	963
a61af66fc99e Initial load duke parents: diff changeset	964 // Summary phase utility routine to fill dead space (if any) at the dense
a61af66fc99e Initial load duke parents: diff changeset	965 // prefix boundary. Should only be called if the the dense prefix is
a61af66fc99e Initial load duke parents: diff changeset	966 // non-empty.
a61af66fc99e Initial load duke parents: diff changeset	967 static void fill_dense_prefix_end(SpaceId id);
a61af66fc99e Initial load duke parents: diff changeset	968
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	969 // Clear the summary data source_region field for the specified addresses.
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	970 static void clear_source_region(HeapWord* beg_addr, HeapWord* end_addr);
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	971
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	972 #ifndef PRODUCT
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	973 // Routines to provoke splitting a young gen space (ParallelOldGCSplitALot).
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	974
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	975 // Fill the region [start, start + words) with live object(s). Only usable
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	976 // for the old and permanent generations.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	977 static void fill_with_live_objects(SpaceId id, HeapWord* const start,
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	978 size_t words);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	979 // Include the new objects in the summary data.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	980 static void summarize_new_objects(SpaceId id, HeapWord* start);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	981
496 b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	982 // Add live objects to a survivor space since it's rare that both survivors
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	983 // are non-empty.
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	984 static void provoke_split_fill_survivor(SpaceId id);
b27c885f75f9 6786188: par compact - "SplitALot" stress mode should fill to_space jcoomes parents: 495 diff changeset	985
483 0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	986 // Add live objects and/or choose the dense prefix to provoke splitting.
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	987 static void provoke_split(bool & maximum_compaction);
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	988 #endif
0f773163217d 6765954: par compact - stress mode for splitting young gen spaces jcoomes parents: 482 diff changeset	989
0 a61af66fc99e Initial load duke parents: diff changeset	990 static void summarize_spaces_quick();
a61af66fc99e Initial load duke parents: diff changeset	991 static void summarize_space(SpaceId id, bool maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	992 static void summary_phase(ParCompactionManager* cm, bool maximum_compaction);
a61af66fc99e Initial load duke parents: diff changeset	993
a61af66fc99e Initial load duke parents: diff changeset	994 // Adjust addresses in roots. Does not adjust addresses in heap.
a61af66fc99e Initial load duke parents: diff changeset	995 static void adjust_roots();
a61af66fc99e Initial load duke parents: diff changeset	996
a61af66fc99e Initial load duke parents: diff changeset	997 // Serial code executed in preparation for the compaction phase.
a61af66fc99e Initial load duke parents: diff changeset	998 static void compact_prologue();
a61af66fc99e Initial load duke parents: diff changeset	999
a61af66fc99e Initial load duke parents: diff changeset	1000 // Move objects to new locations.
a61af66fc99e Initial load duke parents: diff changeset	1001 static void compact_perm(ParCompactionManager* cm);
a61af66fc99e Initial load duke parents: diff changeset	1002 static void compact();
a61af66fc99e Initial load duke parents: diff changeset	1003
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1004 // Add available regions to the stack and draining tasks to the task queue.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1005 static void enqueue_region_draining_tasks(GCTaskQueue* q,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1006 uint parallel_gc_threads);
0 a61af66fc99e Initial load duke parents: diff changeset	1007
a61af66fc99e Initial load duke parents: diff changeset	1008 // Add dense prefix update tasks to the task queue.
a61af66fc99e Initial load duke parents: diff changeset	1009 static void enqueue_dense_prefix_tasks(GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	1010 uint parallel_gc_threads);
a61af66fc99e Initial load duke parents: diff changeset	1011
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1012 // Add region stealing tasks to the task queue.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1013 static void enqueue_region_stealing_tasks(
0 a61af66fc99e Initial load duke parents: diff changeset	1014 GCTaskQueue* q,
a61af66fc99e Initial load duke parents: diff changeset	1015 ParallelTaskTerminator* terminator_ptr,
a61af66fc99e Initial load duke parents: diff changeset	1016 uint parallel_gc_threads);
a61af66fc99e Initial load duke parents: diff changeset	1017
a61af66fc99e Initial load duke parents: diff changeset	1018 // For debugging only - compacts the old gen serially
a61af66fc99e Initial load duke parents: diff changeset	1019 static void compact_serial(ParCompactionManager* cm);
a61af66fc99e Initial load duke parents: diff changeset	1020
a61af66fc99e Initial load duke parents: diff changeset	1021 // If objects are left in eden after a collection, try to move the boundary
a61af66fc99e Initial load duke parents: diff changeset	1022 // and absorb them into the old gen. Returns true if eden was emptied.
a61af66fc99e Initial load duke parents: diff changeset	1023 static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
a61af66fc99e Initial load duke parents: diff changeset	1024 PSYoungGen* young_gen,
a61af66fc99e Initial load duke parents: diff changeset	1025 PSOldGen* old_gen);
a61af66fc99e Initial load duke parents: diff changeset	1026
a61af66fc99e Initial load duke parents: diff changeset	1027 // Reset time since last full gc
a61af66fc99e Initial load duke parents: diff changeset	1028 static void reset_millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	1029
a61af66fc99e Initial load duke parents: diff changeset	1030 protected:
a61af66fc99e Initial load duke parents: diff changeset	1031 #ifdef VALIDATE_MARK_SWEEP
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1032 static GrowableArray<void> _root_refs_stack;
0 a61af66fc99e Initial load duke parents: diff changeset	1033 static GrowableArray<oop> * _live_oops;
a61af66fc99e Initial load duke parents: diff changeset	1034 static GrowableArray<oop> * _live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	1035 static GrowableArray<size_t>* _live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	1036 static size_t _live_oops_index;
a61af66fc99e Initial load duke parents: diff changeset	1037 static size_t _live_oops_index_at_perm;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1038 static GrowableArray<void> _other_refs_stack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1039 static GrowableArray<void> _adjusted_pointers;
0 a61af66fc99e Initial load duke parents: diff changeset	1040 static bool _pointer_tracking;
a61af66fc99e Initial load duke parents: diff changeset	1041 static bool _root_tracking;
a61af66fc99e Initial load duke parents: diff changeset	1042
a61af66fc99e Initial load duke parents: diff changeset	1043 // The following arrays are saved since the time of the last GC and
a61af66fc99e Initial load duke parents: diff changeset	1044 // assist in tracking down problems where someone has done an errant
a61af66fc99e Initial load duke parents: diff changeset	1045 // store into the heap, usually to an oop that wasn't properly
a61af66fc99e Initial load duke parents: diff changeset	1046 // handleized across a GC. If we crash or otherwise fail before the
a61af66fc99e Initial load duke parents: diff changeset	1047 // next GC, we can query these arrays to find out the object we had
a61af66fc99e Initial load duke parents: diff changeset	1048 // intended to do the store to (assuming it is still alive) and the
a61af66fc99e Initial load duke parents: diff changeset	1049 // offset within that object. Covered under RecordMarkSweepCompaction.
a61af66fc99e Initial load duke parents: diff changeset	1050 static GrowableArray<HeapWord> _cur_gc_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	1051 static GrowableArray<HeapWord> _cur_gc_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	1052 static GrowableArray<size_t>* _cur_gc_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	1053 static GrowableArray<HeapWord> _last_gc_live_oops;
a61af66fc99e Initial load duke parents: diff changeset	1054 static GrowableArray<HeapWord> _last_gc_live_oops_moved_to;
a61af66fc99e Initial load duke parents: diff changeset	1055 static GrowableArray<size_t>* _last_gc_live_oops_size;
a61af66fc99e Initial load duke parents: diff changeset	1056 #endif
a61af66fc99e Initial load duke parents: diff changeset	1057
a61af66fc99e Initial load duke parents: diff changeset	1058 public:
a61af66fc99e Initial load duke parents: diff changeset	1059 class MarkAndPushClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1060 private:
0 a61af66fc99e Initial load duke parents: diff changeset	1061 ParCompactionManager* _compaction_manager;
a61af66fc99e Initial load duke parents: diff changeset	1062 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1063 MarkAndPushClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1064 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1065 virtual void do_oop(narrowOop* p);
0 a61af66fc99e Initial load duke parents: diff changeset	1066 };
a61af66fc99e Initial load duke parents: diff changeset	1067
a61af66fc99e Initial load duke parents: diff changeset	1068 PSParallelCompact();
a61af66fc99e Initial load duke parents: diff changeset	1069
a61af66fc99e Initial load duke parents: diff changeset	1070 // Convenient accessor for Universe::heap().
a61af66fc99e Initial load duke parents: diff changeset	1071 static ParallelScavengeHeap* gc_heap() {
a61af66fc99e Initial load duke parents: diff changeset	1072 return (ParallelScavengeHeap*)Universe::heap();
a61af66fc99e Initial load duke parents: diff changeset	1073 }
a61af66fc99e Initial load duke parents: diff changeset	1074
a61af66fc99e Initial load duke parents: diff changeset	1075 static void invoke(bool maximum_heap_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1076 static void invoke_no_policy(bool maximum_heap_compaction);
a61af66fc99e Initial load duke parents: diff changeset	1077
a61af66fc99e Initial load duke parents: diff changeset	1078 static void post_initialize();
a61af66fc99e Initial load duke parents: diff changeset	1079 // Perform initialization for PSParallelCompact that requires
a61af66fc99e Initial load duke parents: diff changeset	1080 // allocations. This should be called during the VM initialization
a61af66fc99e Initial load duke parents: diff changeset	1081 // at a pointer where it would be appropriate to return a JNI_ENOMEM
a61af66fc99e Initial load duke parents: diff changeset	1082 // in the event of a failure.
a61af66fc99e Initial load duke parents: diff changeset	1083 static bool initialize();
a61af66fc99e Initial load duke parents: diff changeset	1084
a61af66fc99e Initial load duke parents: diff changeset	1085 // Public accessors
a61af66fc99e Initial load duke parents: diff changeset	1086 static elapsedTimer* accumulated_time() { return &_accumulated_time; }
a61af66fc99e Initial load duke parents: diff changeset	1087 static unsigned int total_invocations() { return _total_invocations; }
a61af66fc99e Initial load duke parents: diff changeset	1088 static CollectorCounters* counters() { return _counters; }
a61af66fc99e Initial load duke parents: diff changeset	1089
a61af66fc99e Initial load duke parents: diff changeset	1090 // Used to add tasks
a61af66fc99e Initial load duke parents: diff changeset	1091 static GCTaskManager* const gc_task_manager();
a61af66fc99e Initial load duke parents: diff changeset	1092 static klassOop updated_int_array_klass_obj() {
a61af66fc99e Initial load duke parents: diff changeset	1093 return _updated_int_array_klass_obj;
a61af66fc99e Initial load duke parents: diff changeset	1094 }
a61af66fc99e Initial load duke parents: diff changeset	1095
a61af66fc99e Initial load duke parents: diff changeset	1096 // Marking support
a61af66fc99e Initial load duke parents: diff changeset	1097 static inline bool mark_obj(oop obj);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1098 // Check mark and maybe push on marking stack
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1099 template <class T> static inline void mark_and_push(ParCompactionManager* cm,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1100 T* p);
0 a61af66fc99e Initial load duke parents: diff changeset	1101
a61af66fc99e Initial load duke parents: diff changeset	1102 // Compaction support.
a61af66fc99e Initial load duke parents: diff changeset	1103 // Return true if p is in the range [beg_addr, end_addr).
a61af66fc99e Initial load duke parents: diff changeset	1104 static inline bool is_in(HeapWord* p, HeapWord* beg_addr, HeapWord* end_addr);
a61af66fc99e Initial load duke parents: diff changeset	1105 static inline bool is_in(oop* p, HeapWord* beg_addr, HeapWord* end_addr);
a61af66fc99e Initial load duke parents: diff changeset	1106
a61af66fc99e Initial load duke parents: diff changeset	1107 // Convenience wrappers for per-space data kept in _space_info.
a61af66fc99e Initial load duke parents: diff changeset	1108 static inline MutableSpace* space(SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1109 static inline HeapWord* new_top(SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1110 static inline HeapWord* dense_prefix(SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1111 static inline ObjectStartArray* start_array(SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1112
a61af66fc99e Initial load duke parents: diff changeset	1113 // Return true if the klass should be updated.
a61af66fc99e Initial load duke parents: diff changeset	1114 static inline bool should_update_klass(klassOop k);
a61af66fc99e Initial load duke parents: diff changeset	1115
a61af66fc99e Initial load duke parents: diff changeset	1116 // Move and update the live objects in the specified space.
a61af66fc99e Initial load duke parents: diff changeset	1117 static void move_and_update(ParCompactionManager* cm, SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1118
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1119 // Process the end of the given region range in the dense prefix.
0 a61af66fc99e Initial load duke parents: diff changeset	1120 // This includes saving any object not updated.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1121 static void dense_prefix_regions_epilogue(ParCompactionManager* cm,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1122 size_t region_start_index,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1123 size_t region_end_index,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1124 idx_t exiting_object_offset,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1125 idx_t region_offset_start,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1126 idx_t region_offset_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1127
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1128 // Update a region in the dense prefix. For each live object
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1129 // in the region, update it's interior references. For each
0 a61af66fc99e Initial load duke parents: diff changeset	1130 // dead object, fill it with deadwood. Dead space at the end
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1131 // of a region range will be filled to the start of the next
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1132 // live object regardless of the region_index_end. None of the
0 a61af66fc99e Initial load duke parents: diff changeset	1133 // objects in the dense prefix move and dead space is dead
a61af66fc99e Initial load duke parents: diff changeset	1134 // (holds only dead objects that don't need any processing), so
a61af66fc99e Initial load duke parents: diff changeset	1135 // dead space can be filled in any order.
a61af66fc99e Initial load duke parents: diff changeset	1136 static void update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1137 SpaceId space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1138 size_t region_index_start,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1139 size_t region_index_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1140
a61af66fc99e Initial load duke parents: diff changeset	1141 // Return the address of the count + 1st live word in the range [beg, end).
a61af66fc99e Initial load duke parents: diff changeset	1142 static HeapWord* skip_live_words(HeapWord* beg, HeapWord* end, size_t count);
a61af66fc99e Initial load duke parents: diff changeset	1143
a61af66fc99e Initial load duke parents: diff changeset	1144 // Return the address of the word to be copied to dest_addr, which must be
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1145 // aligned to a region boundary.
0 a61af66fc99e Initial load duke parents: diff changeset	1146 static HeapWord* first_src_addr(HeapWord* const dest_addr,
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1147 SpaceId src_space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1148 size_t src_region_idx);
0 a61af66fc99e Initial load duke parents: diff changeset	1149
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1150 // Determine the next source region, set closure.source() to the start of the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1151 // new region return the region index. Parameter end_addr is the address one
0 a61af66fc99e Initial load duke parents: diff changeset	1152 // beyond the end of source range just processed. If necessary, switch to a
a61af66fc99e Initial load duke parents: diff changeset	1153 // new source space and set src_space_id (in-out parameter) and src_space_top
a61af66fc99e Initial load duke parents: diff changeset	1154 // (out parameter) accordingly.
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1155 static size_t next_src_region(MoveAndUpdateClosure& closure,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1156 SpaceId& src_space_id,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1157 HeapWord*& src_space_top,
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1158 HeapWord* end_addr);
0 a61af66fc99e Initial load duke parents: diff changeset	1159
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1160 // Decrement the destination count for each non-empty source region in the
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1161 // range [beg_region, region(region_align_up(end_addr))). If the destination
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1162 // count for a region goes to 0 and it needs to be filled, enqueue it.
0 a61af66fc99e Initial load duke parents: diff changeset	1163 static void decrement_destination_counts(ParCompactionManager* cm,
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1164 SpaceId src_space_id,
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1165 size_t beg_region,
0 a61af66fc99e Initial load duke parents: diff changeset	1166 HeapWord* end_addr);
a61af66fc99e Initial load duke parents: diff changeset	1167
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1168 // Fill a region, copying objects from one or more source regions.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1169 static void fill_region(ParCompactionManager* cm, size_t region_idx);
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1170 static void fill_and_update_region(ParCompactionManager* cm, size_t region) {
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1171 fill_region(cm, region);
0 a61af66fc99e Initial load duke parents: diff changeset	1172 }
a61af66fc99e Initial load duke parents: diff changeset	1173
a61af66fc99e Initial load duke parents: diff changeset	1174 // Update the deferred objects in the space.
a61af66fc99e Initial load duke parents: diff changeset	1175 static void update_deferred_objects(ParCompactionManager* cm, SpaceId id);
a61af66fc99e Initial load duke parents: diff changeset	1176
a61af66fc99e Initial load duke parents: diff changeset	1177 // Mark pointer and follow contents.
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1178 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1179 static inline void mark_and_follow(ParCompactionManager* cm, T* p);
0 a61af66fc99e Initial load duke parents: diff changeset	1180
a61af66fc99e Initial load duke parents: diff changeset	1181 static ParMarkBitMap* mark_bitmap() { return &_mark_bitmap; }
a61af66fc99e Initial load duke parents: diff changeset	1182 static ParallelCompactData& summary_data() { return _summary_data; }
a61af66fc99e Initial load duke parents: diff changeset	1183
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1184 static inline void adjust_pointer(oop* p) { adjust_pointer(p, false); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1185 static inline void adjust_pointer(narrowOop* p) { adjust_pointer(p, false); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1186
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1187 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1188 static inline void adjust_pointer(T* p,
0 a61af66fc99e Initial load duke parents: diff changeset	1189 HeapWord* beg_addr,
a61af66fc99e Initial load duke parents: diff changeset	1190 HeapWord* end_addr);
a61af66fc99e Initial load duke parents: diff changeset	1191
a61af66fc99e Initial load duke parents: diff changeset	1192 // Reference Processing
a61af66fc99e Initial load duke parents: diff changeset	1193 static ReferenceProcessor* const ref_processor() { return _ref_processor; }
a61af66fc99e Initial load duke parents: diff changeset	1194
a61af66fc99e Initial load duke parents: diff changeset	1195 // Return the SpaceId for the given address.
a61af66fc99e Initial load duke parents: diff changeset	1196 static SpaceId space_id(HeapWord* addr);
a61af66fc99e Initial load duke parents: diff changeset	1197
a61af66fc99e Initial load duke parents: diff changeset	1198 // Time since last full gc (in milliseconds).
a61af66fc99e Initial load duke parents: diff changeset	1199 static jlong millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	1200
a61af66fc99e Initial load duke parents: diff changeset	1201 #ifdef VALIDATE_MARK_SWEEP
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1202 static void track_adjusted_pointer(void* p, bool isroot);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1203 static void check_adjust_pointer(void* p);
0 a61af66fc99e Initial load duke parents: diff changeset	1204 static void track_interior_pointers(oop obj);
a61af66fc99e Initial load duke parents: diff changeset	1205 static void check_interior_pointers();
a61af66fc99e Initial load duke parents: diff changeset	1206
a61af66fc99e Initial load duke parents: diff changeset	1207 static void reset_live_oop_tracking(bool at_perm);
a61af66fc99e Initial load duke parents: diff changeset	1208 static void register_live_oop(oop p, size_t size);
a61af66fc99e Initial load duke parents: diff changeset	1209 static void validate_live_oop(oop p, size_t size);
a61af66fc99e Initial load duke parents: diff changeset	1210 static void live_oop_moved_to(HeapWord* q, size_t size, HeapWord* compaction_top);
a61af66fc99e Initial load duke parents: diff changeset	1211 static void compaction_complete();
a61af66fc99e Initial load duke parents: diff changeset	1212
a61af66fc99e Initial load duke parents: diff changeset	1213 // Querying operation of RecordMarkSweepCompaction results.
a61af66fc99e Initial load duke parents: diff changeset	1214 // Finds and prints the current base oop and offset for a word
a61af66fc99e Initial load duke parents: diff changeset	1215 // within an oop that was live during the last GC. Helpful for
a61af66fc99e Initial load duke parents: diff changeset	1216 // tracking down heap stomps.
a61af66fc99e Initial load duke parents: diff changeset	1217 static void print_new_location_of_heap_address(HeapWord* q);
a61af66fc99e Initial load duke parents: diff changeset	1218 #endif // #ifdef VALIDATE_MARK_SWEEP
a61af66fc99e Initial load duke parents: diff changeset	1219
a61af66fc99e Initial load duke parents: diff changeset	1220 // Call backs for class unloading
a61af66fc99e Initial load duke parents: diff changeset	1221 // Update subklass/sibling/implementor links at end of marking.
a61af66fc99e Initial load duke parents: diff changeset	1222 static void revisit_weak_klass_link(ParCompactionManager* cm, Klass* k);
a61af66fc99e Initial load duke parents: diff changeset	1223
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 579 diff changeset	1224 // Clear unmarked oops in MDOs at the end of marking.
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 579 diff changeset	1225 static void revisit_mdo(ParCompactionManager* cm, DataLayout* p);
8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 579 diff changeset	1226
0 a61af66fc99e Initial load duke parents: diff changeset	1227 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1228 // Debugging support.
a61af66fc99e Initial load duke parents: diff changeset	1229 static const char* space_names[last_space_id];
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1230 static void print_region_ranges();
0 a61af66fc99e Initial load duke parents: diff changeset	1231 static void print_dense_prefix_stats(const char* const algorithm,
a61af66fc99e Initial load duke parents: diff changeset	1232 const SpaceId id,
a61af66fc99e Initial load duke parents: diff changeset	1233 const bool maximum_compaction,
a61af66fc99e Initial load duke parents: diff changeset	1234 HeapWord* const addr);
482 7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1235 static void summary_phase_msg(SpaceId dst_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1236 HeapWord* dst_beg, HeapWord* dst_end,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1237 SpaceId src_space_id,
7c2386d67889 6765745: par compact - allow young gen spaces to be split jcoomes parents: 481 diff changeset	1238 HeapWord* src_beg, HeapWord* src_end);
0 a61af66fc99e Initial load duke parents: diff changeset	1239 #endif // #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	1240
a61af66fc99e Initial load duke parents: diff changeset	1241 #ifdef ASSERT
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1242 // Sanity check the new location of a word in the heap.
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1243 static inline void check_new_location(HeapWord* old_addr, HeapWord* new_addr);
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1244 // Verify that all the regions have been emptied.
0 a61af66fc99e Initial load duke parents: diff changeset	1245 static void verify_complete(SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1246 #endif // #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	1247 };
a61af66fc99e Initial load duke parents: diff changeset	1248
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1249 inline bool PSParallelCompact::mark_obj(oop obj) {
0 a61af66fc99e Initial load duke parents: diff changeset	1250 const int obj_size = obj->size();
a61af66fc99e Initial load duke parents: diff changeset	1251 if (mark_bitmap()->mark_obj(obj, obj_size)) {
a61af66fc99e Initial load duke parents: diff changeset	1252 _summary_data.add_obj(obj, obj_size);
a61af66fc99e Initial load duke parents: diff changeset	1253 return true;
a61af66fc99e Initial load duke parents: diff changeset	1254 } else {
a61af66fc99e Initial load duke parents: diff changeset	1255 return false;
a61af66fc99e Initial load duke parents: diff changeset	1256 }
a61af66fc99e Initial load duke parents: diff changeset	1257 }
a61af66fc99e Initial load duke parents: diff changeset	1258
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1259 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1260 inline void PSParallelCompact::follow_root(ParCompactionManager* cm, T* p) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1261 assert(!Universe::heap()->is_in_reserved(p),
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1262 "roots shouldn't be things within the heap");
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1263 #ifdef VALIDATE_MARK_SWEEP
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1264 if (ValidateMarkSweep) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1265 guarantee(!_root_refs_stack->contains(p), "should only be in here once");
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1266 _root_refs_stack->push(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1267 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1268 #endif
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1269 T heap_oop = oopDesc::load_heap_oop(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1270 if (!oopDesc::is_null(heap_oop)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1271 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1272 if (mark_bitmap()->is_unmarked(obj)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1273 if (mark_obj(obj)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1274 obj->follow_contents(cm);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1275 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1276 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1277 }
1311 2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays jcoomes parents: 993 diff changeset	1278 cm->follow_marking_stacks();
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1279 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1280
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1281 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1282 inline void PSParallelCompact::mark_and_follow(ParCompactionManager* cm,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1283 T* p) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1284 T heap_oop = oopDesc::load_heap_oop(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1285 if (!oopDesc::is_null(heap_oop)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1286 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1287 if (mark_bitmap()->is_unmarked(obj)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1288 if (mark_obj(obj)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1289 obj->follow_contents(cm);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1290 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1291 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1292 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1293 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1294
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1295 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1296 inline void PSParallelCompact::mark_and_push(ParCompactionManager* cm, T* p) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1297 T heap_oop = oopDesc::load_heap_oop(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1298 if (!oopDesc::is_null(heap_oop)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1299 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1300 if (mark_bitmap()->is_unmarked(obj)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1301 if (mark_obj(obj)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1302 // This thread marked the object and owns the subsequent processing of it.
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1303 cm->save_for_scanning(obj);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1304 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1305 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1306 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1307 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1308
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1309 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1310 inline void PSParallelCompact::adjust_pointer(T* p, bool isroot) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1311 T heap_oop = oopDesc::load_heap_oop(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1312 if (!oopDesc::is_null(heap_oop)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1313 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1314 oop new_obj = (oop)summary_data().calc_new_pointer(obj);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1315 assert(new_obj != NULL \|\| // is forwarding ptr?
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1316 obj->is_shared(), // never forwarded?
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1317 "should be forwarded");
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1318 // Just always do the update unconditionally?
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1319 if (new_obj != NULL) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1320 assert(Universe::heap()->is_in_reserved(new_obj),
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1321 "should be in object space");
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1322 oopDesc::encode_store_heap_oop_not_null(p, new_obj);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1323 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1324 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1325 VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot));
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1326 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1327
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1328 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1329 inline void PSParallelCompact::KeepAliveClosure::do_oop_work(T* p) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1330 #ifdef VALIDATE_MARK_SWEEP
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1331 if (ValidateMarkSweep) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1332 if (!Universe::heap()->is_in_reserved(p)) {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1333 _root_refs_stack->push(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1334 } else {
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1335 _other_refs_stack->push(p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1336 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1337 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1338 #endif
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1339 mark_and_push(_compaction_manager, p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1340 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1341
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1342 inline bool PSParallelCompact::print_phases() {
0 a61af66fc99e Initial load duke parents: diff changeset	1343 return _print_phases;
a61af66fc99e Initial load duke parents: diff changeset	1344 }
a61af66fc99e Initial load duke parents: diff changeset	1345
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1346 inline double PSParallelCompact::normal_distribution(double density) {
0 a61af66fc99e Initial load duke parents: diff changeset	1347 assert(_dwl_initialized, "uninitialized");
a61af66fc99e Initial load duke parents: diff changeset	1348 const double squared_term = (density - _dwl_mean) / _dwl_std_dev;
a61af66fc99e Initial load duke parents: diff changeset	1349 return _dwl_first_term * exp(-0.5 * squared_term * squared_term);
a61af66fc99e Initial load duke parents: diff changeset	1350 }
a61af66fc99e Initial load duke parents: diff changeset	1351
a61af66fc99e Initial load duke parents: diff changeset	1352 inline bool
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1353 PSParallelCompact::dead_space_crosses_boundary(const RegionData* region,
0 a61af66fc99e Initial load duke parents: diff changeset	1354 idx_t bit)
a61af66fc99e Initial load duke parents: diff changeset	1355 {
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1356 assert(bit > 0, "cannot call this for the first bit/region");
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1357 assert(_summary_data.region_to_addr(region) == _mark_bitmap.bit_to_addr(bit),
0 a61af66fc99e Initial load duke parents: diff changeset	1358 "sanity check");
a61af66fc99e Initial load duke parents: diff changeset	1359
a61af66fc99e Initial load duke parents: diff changeset	1360 // Dead space crosses the boundary if (1) a partial object does not extend
375 81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1361 // onto the region, (2) an object does not start at the beginning of the
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1362 // region, and (3) an object does not end at the end of the prior region.
81cd571500b0 6725697: par compact - rename class ChunkData to RegionData jcoomes parents: 269 diff changeset	1363 return region->partial_obj_size() == 0 &&
0 a61af66fc99e Initial load duke parents: diff changeset	1364 !_mark_bitmap.is_obj_beg(bit) &&
a61af66fc99e Initial load duke parents: diff changeset	1365 !_mark_bitmap.is_obj_end(bit - 1);
a61af66fc99e Initial load duke parents: diff changeset	1366 }
a61af66fc99e Initial load duke parents: diff changeset	1367
a61af66fc99e Initial load duke parents: diff changeset	1368 inline bool
a61af66fc99e Initial load duke parents: diff changeset	1369 PSParallelCompact::is_in(HeapWord* p, HeapWord* beg_addr, HeapWord* end_addr) {
a61af66fc99e Initial load duke parents: diff changeset	1370 return p >= beg_addr && p < end_addr;
a61af66fc99e Initial load duke parents: diff changeset	1371 }
a61af66fc99e Initial load duke parents: diff changeset	1372
a61af66fc99e Initial load duke parents: diff changeset	1373 inline bool
a61af66fc99e Initial load duke parents: diff changeset	1374 PSParallelCompact::is_in(oop* p, HeapWord* beg_addr, HeapWord* end_addr) {
a61af66fc99e Initial load duke parents: diff changeset	1375 return is_in((HeapWord*)p, beg_addr, end_addr);
a61af66fc99e Initial load duke parents: diff changeset	1376 }
a61af66fc99e Initial load duke parents: diff changeset	1377
a61af66fc99e Initial load duke parents: diff changeset	1378 inline MutableSpace* PSParallelCompact::space(SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	1379 assert(id < last_space_id, "id out of range");
a61af66fc99e Initial load duke parents: diff changeset	1380 return _space_info[id].space();
a61af66fc99e Initial load duke parents: diff changeset	1381 }
a61af66fc99e Initial load duke parents: diff changeset	1382
a61af66fc99e Initial load duke parents: diff changeset	1383 inline HeapWord* PSParallelCompact::new_top(SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	1384 assert(id < last_space_id, "id out of range");
a61af66fc99e Initial load duke parents: diff changeset	1385 return _space_info[id].new_top();
a61af66fc99e Initial load duke parents: diff changeset	1386 }
a61af66fc99e Initial load duke parents: diff changeset	1387
a61af66fc99e Initial load duke parents: diff changeset	1388 inline HeapWord* PSParallelCompact::dense_prefix(SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	1389 assert(id < last_space_id, "id out of range");
a61af66fc99e Initial load duke parents: diff changeset	1390 return _space_info[id].dense_prefix();
a61af66fc99e Initial load duke parents: diff changeset	1391 }
a61af66fc99e Initial load duke parents: diff changeset	1392
a61af66fc99e Initial load duke parents: diff changeset	1393 inline ObjectStartArray* PSParallelCompact::start_array(SpaceId id) {
a61af66fc99e Initial load duke parents: diff changeset	1394 assert(id < last_space_id, "id out of range");
a61af66fc99e Initial load duke parents: diff changeset	1395 return _space_info[id].start_array();
a61af66fc99e Initial load duke parents: diff changeset	1396 }
a61af66fc99e Initial load duke parents: diff changeset	1397
a61af66fc99e Initial load duke parents: diff changeset	1398 inline bool PSParallelCompact::should_update_klass(klassOop k) {
a61af66fc99e Initial load duke parents: diff changeset	1399 return ((HeapWord*) k) >= dense_prefix(perm_space_id);
a61af66fc99e Initial load duke parents: diff changeset	1400 }
a61af66fc99e Initial load duke parents: diff changeset	1401
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1402 template <class T>
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1403 inline void PSParallelCompact::adjust_pointer(T* p,
0 a61af66fc99e Initial load duke parents: diff changeset	1404 HeapWord* beg_addr,
a61af66fc99e Initial load duke parents: diff changeset	1405 HeapWord* end_addr) {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1406 if (is_in((HeapWord*)p, beg_addr, end_addr)) {
0 a61af66fc99e Initial load duke parents: diff changeset	1407 adjust_pointer(p);
a61af66fc99e Initial load duke parents: diff changeset	1408 }
a61af66fc99e Initial load duke parents: diff changeset	1409 }
a61af66fc99e Initial load duke parents: diff changeset	1410
495 234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1411 #ifdef ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1412 inline void
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1413 PSParallelCompact::check_new_location(HeapWord* old_addr, HeapWord* new_addr)
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1414 {
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1415 assert(old_addr >= new_addr \|\| space_id(old_addr) != space_id(new_addr),
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1416 "must move left or to a different space");
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1417 }
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1418 #endif // ASSERT
234c22e54b98 6784849: par compact - can fail when to_space is non-empty jcoomes parents: 483 diff changeset	1419
0 a61af66fc99e Initial load duke parents: diff changeset	1420 class MoveAndUpdateClosure: public ParMarkBitMapClosure {
a61af66fc99e Initial load duke parents: diff changeset	1421 public:
a61af66fc99e Initial load duke parents: diff changeset	1422 inline MoveAndUpdateClosure(ParMarkBitMap* bitmap, ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1423 ObjectStartArray* start_array,
a61af66fc99e Initial load duke parents: diff changeset	1424 HeapWord* destination, size_t words);
a61af66fc99e Initial load duke parents: diff changeset	1425
a61af66fc99e Initial load duke parents: diff changeset	1426 // Accessors.
a61af66fc99e Initial load duke parents: diff changeset	1427 HeapWord* destination() const { return _destination; }
a61af66fc99e Initial load duke parents: diff changeset	1428
a61af66fc99e Initial load duke parents: diff changeset	1429 // If the object will fit (size <= words_remaining()), copy it to the current
a61af66fc99e Initial load duke parents: diff changeset	1430 // destination, update the interior oops and the start array and return either
a61af66fc99e Initial load duke parents: diff changeset	1431 // full (if the closure is full) or incomplete. If the object will not fit,
a61af66fc99e Initial load duke parents: diff changeset	1432 // return would_overflow.
a61af66fc99e Initial load duke parents: diff changeset	1433 virtual IterationStatus do_addr(HeapWord* addr, size_t size);
a61af66fc99e Initial load duke parents: diff changeset	1434
a61af66fc99e Initial load duke parents: diff changeset	1435 // Copy enough words to fill this closure, starting at source(). Interior
a61af66fc99e Initial load duke parents: diff changeset	1436 // oops and the start array are not updated. Return full.
a61af66fc99e Initial load duke parents: diff changeset	1437 IterationStatus copy_until_full();
a61af66fc99e Initial load duke parents: diff changeset	1438
a61af66fc99e Initial load duke parents: diff changeset	1439 // Copy enough words to fill this closure or to the end of an object,
a61af66fc99e Initial load duke parents: diff changeset	1440 // whichever is smaller, starting at source(). Interior oops and the start
a61af66fc99e Initial load duke parents: diff changeset	1441 // array are not updated.
a61af66fc99e Initial load duke parents: diff changeset	1442 void copy_partial_obj();
a61af66fc99e Initial load duke parents: diff changeset	1443
a61af66fc99e Initial load duke parents: diff changeset	1444 protected:
a61af66fc99e Initial load duke parents: diff changeset	1445 // Update variables to indicate that word_count words were processed.
a61af66fc99e Initial load duke parents: diff changeset	1446 inline void update_state(size_t word_count);
a61af66fc99e Initial load duke parents: diff changeset	1447
a61af66fc99e Initial load duke parents: diff changeset	1448 protected:
a61af66fc99e Initial load duke parents: diff changeset	1449 ObjectStartArray* const _start_array;
a61af66fc99e Initial load duke parents: diff changeset	1450 HeapWord* _destination; // Next addr to be written.
a61af66fc99e Initial load duke parents: diff changeset	1451 };
a61af66fc99e Initial load duke parents: diff changeset	1452
a61af66fc99e Initial load duke parents: diff changeset	1453 inline
a61af66fc99e Initial load duke parents: diff changeset	1454 MoveAndUpdateClosure::MoveAndUpdateClosure(ParMarkBitMap* bitmap,
a61af66fc99e Initial load duke parents: diff changeset	1455 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1456 ObjectStartArray* start_array,
a61af66fc99e Initial load duke parents: diff changeset	1457 HeapWord* destination,
a61af66fc99e Initial load duke parents: diff changeset	1458 size_t words) :
a61af66fc99e Initial load duke parents: diff changeset	1459 ParMarkBitMapClosure(bitmap, cm, words), _start_array(start_array)
a61af66fc99e Initial load duke parents: diff changeset	1460 {
a61af66fc99e Initial load duke parents: diff changeset	1461 _destination = destination;
a61af66fc99e Initial load duke parents: diff changeset	1462 }
a61af66fc99e Initial load duke parents: diff changeset	1463
a61af66fc99e Initial load duke parents: diff changeset	1464 inline void MoveAndUpdateClosure::update_state(size_t words)
a61af66fc99e Initial load duke parents: diff changeset	1465 {
a61af66fc99e Initial load duke parents: diff changeset	1466 decrement_words_remaining(words);
a61af66fc99e Initial load duke parents: diff changeset	1467 _source += words;
a61af66fc99e Initial load duke parents: diff changeset	1468 _destination += words;
a61af66fc99e Initial load duke parents: diff changeset	1469 }
a61af66fc99e Initial load duke parents: diff changeset	1470
a61af66fc99e Initial load duke parents: diff changeset	1471 class UpdateOnlyClosure: public ParMarkBitMapClosure {
a61af66fc99e Initial load duke parents: diff changeset	1472 private:
a61af66fc99e Initial load duke parents: diff changeset	1473 const PSParallelCompact::SpaceId _space_id;
a61af66fc99e Initial load duke parents: diff changeset	1474 ObjectStartArray* const _start_array;
a61af66fc99e Initial load duke parents: diff changeset	1475
a61af66fc99e Initial load duke parents: diff changeset	1476 public:
a61af66fc99e Initial load duke parents: diff changeset	1477 UpdateOnlyClosure(ParMarkBitMap* mbm,
a61af66fc99e Initial load duke parents: diff changeset	1478 ParCompactionManager* cm,
a61af66fc99e Initial load duke parents: diff changeset	1479 PSParallelCompact::SpaceId space_id);
a61af66fc99e Initial load duke parents: diff changeset	1480
a61af66fc99e Initial load duke parents: diff changeset	1481 // Update the object.
a61af66fc99e Initial load duke parents: diff changeset	1482 virtual IterationStatus do_addr(HeapWord* addr, size_t words);
a61af66fc99e Initial load duke parents: diff changeset	1483
a61af66fc99e Initial load duke parents: diff changeset	1484 inline void do_addr(HeapWord* addr);
a61af66fc99e Initial load duke parents: diff changeset	1485 };
a61af66fc99e Initial load duke parents: diff changeset	1486
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1487 inline void UpdateOnlyClosure::do_addr(HeapWord* addr)
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1488 {
0 a61af66fc99e Initial load duke parents: diff changeset	1489 _start_array->allocate_block(addr);
a61af66fc99e Initial load duke parents: diff changeset	1490 oop(addr)->update_contents(compaction_manager());
a61af66fc99e Initial load duke parents: diff changeset	1491 }
a61af66fc99e Initial load duke parents: diff changeset	1492
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1493 class FillClosure: public ParMarkBitMapClosure
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1494 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1495 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	1496 FillClosure(ParCompactionManager* cm, PSParallelCompact::SpaceId space_id) :
0 a61af66fc99e Initial load duke parents: diff changeset	1497 ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm),
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1498 _start_array(PSParallelCompact::start_array(space_id))
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1499 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1500 assert(space_id == PSParallelCompact::perm_space_id \|\|
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1501 space_id == PSParallelCompact::old_space_id,
0 a61af66fc99e Initial load duke parents: diff changeset	1502 "cannot use FillClosure in the young gen");
a61af66fc99e Initial load duke parents: diff changeset	1503 }
a61af66fc99e Initial load duke parents: diff changeset	1504
a61af66fc99e Initial load duke parents: diff changeset	1505 virtual IterationStatus do_addr(HeapWord* addr, size_t size) {
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1506 CollectedHeap::fill_with_objects(addr, size);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1507 HeapWord* const end = addr + size;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1508 do {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1509 _start_array->allocate_block(addr);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1510 addr += oop(addr)->size();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1511 } while (addr < end);
0 a61af66fc99e Initial load duke parents: diff changeset	1512 return ParMarkBitMap::incomplete;
a61af66fc99e Initial load duke parents: diff changeset	1513 }
a61af66fc99e Initial load duke parents: diff changeset	1514
a61af66fc99e Initial load duke parents: diff changeset	1515 private:
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 376 diff changeset	1516 ObjectStartArray* const _start_array;
0 a61af66fc99e Initial load duke parents: diff changeset	1517 };

Mercurial > hg > graal-compiler

annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp @ 1552:c18cbe5936b8