graal-jvmci-8: src/share/vm/gc_implementation/g1/heapRegionSet.hpp annotate

annotate src/share/vm/gc_implementation/g1/heapRegionSet.hpp @ 20304:a22acf6d7598

8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso

author	tschatzl
date	Mon, 21 Jul 2014 10:00:31 +0200
parents	78bbf4d43a14
children	6701abbc4441

rev	line source
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	1 /*
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	4 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	7 * published by the Free Software Foundation.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	8 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	13 * accompanied this code).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	14 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	18 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	21 * questions.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	22 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	23 */
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	24
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_HPP
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_HPP
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	27
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	28 #include "gc_implementation/g1/heapRegion.hpp"
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	29
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	30 // Large buffer for some cases where the output might be larger than normal.
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	31 #define HRS_ERR_MSG_BUFSZ 512
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	32 typedef FormatBuffer<HRS_ERR_MSG_BUFSZ> hrs_err_msg;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	33
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	34 // Set verification will be forced either if someone defines
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	35 // HEAP_REGION_SET_FORCE_VERIFY to be 1, or in builds in which
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	36 // asserts are compiled in.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	37 #ifndef HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	38 #define HEAP_REGION_SET_FORCE_VERIFY defined(ASSERT)
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	39 #endif // HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	40
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	41 class hrs_ext_msg;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	42
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	43 class HRSMtSafeChecker : public CHeapObj<mtGC> {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	44 public:
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	45 virtual void check() = 0;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	46 };
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	47
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	48 class MasterFreeRegionListMtSafeChecker : public HRSMtSafeChecker { public: void check(); };
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	49 class SecondaryFreeRegionListMtSafeChecker : public HRSMtSafeChecker { public: void check(); };
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	50 class HumongousRegionSetMtSafeChecker : public HRSMtSafeChecker { public: void check(); };
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	51 class OldRegionSetMtSafeChecker : public HRSMtSafeChecker { public: void check(); };
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	52
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	53 class HeapRegionSetCount VALUE_OBJ_CLASS_SPEC {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	54 friend class VMStructs;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	55 uint _length;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	56 size_t _capacity;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	57
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	58 public:
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	59 HeapRegionSetCount() : _length(0), _capacity(0) { }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	60
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	61 const uint length() const { return _length; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	62 const size_t capacity() const { return _capacity; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	63
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	64 void increment(uint length_to_add, size_t capacity_to_add) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	65 _length += length_to_add;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	66 _capacity += capacity_to_add;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	67 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	68
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	69 void decrement(const uint length_to_remove, const size_t capacity_to_remove) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	70 _length -= length_to_remove;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	71 _capacity -= capacity_to_remove;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	72 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	73 };
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	74
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	75 // Base class for all the classes that represent heap region sets. It
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	76 // contains the basic attributes that each set needs to maintain
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	77 // (e.g., length, region num, used bytes sum) plus any shared
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	78 // functionality (e.g., verification).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	79
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	80 class HeapRegionSetBase VALUE_OBJ_CLASS_SPEC {
4830 0b3d1ec6eaee 7097586: G1: improve the per-space output when using jmap -heap tonyp parents: 4072 diff changeset	81 friend class VMStructs;
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	82 private:
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	83 bool _is_humongous;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	84 bool _is_empty;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	85 HRSMtSafeChecker* _mt_safety_checker;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	86
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	87 protected:
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	88 // The number of regions added to the set. If the set contains
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	89 // only humongous regions, this reflects only 'starts humongous'
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	90 // regions and does not include 'continues humongous' ones.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	91 HeapRegionSetCount _count;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	92
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	93 const char* _name;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	94
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	95 bool _verify_in_progress;
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3765 diff changeset	96
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	97 // verify_region() is used to ensure that the contents of a region
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	98 // added to / removed from a set are consistent.
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	99 void verify_region(HeapRegion* hr) PRODUCT_RETURN;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	100
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	101 // Indicates whether all regions in the set should be humongous or
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	102 // not. Only used during verification.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	103 bool regions_humongous() { return _is_humongous; }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	104
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	105 // Indicates whether all regions in the set should be empty or
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	106 // not. Only used during verification.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	107 bool regions_empty() { return _is_empty; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	108
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	109 void check_mt_safety() {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	110 if (_mt_safety_checker != NULL) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	111 _mt_safety_checker->check();
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	112 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	113 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	114
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	115 virtual void fill_in_ext_msg_extra(hrs_ext_msg* msg) { }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	116
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	117 HeapRegionSetBase(const char* name, bool humongous, bool empty, HRSMtSafeChecker* mt_safety_checker);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	118
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	119 public:
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	120 const char* name() { return _name; }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	121
20304 a22acf6d7598 8048112: G1 Full GC needs to support the case when the very first region is not available tschatzl parents: 17937 diff changeset	122 uint length() const { return _count.length(); }
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	123
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	124 bool is_empty() { return _count.length() == 0; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	125
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	126 size_t total_capacity_bytes() {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	127 return _count.capacity();
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	128 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	129
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	130 // It updates the fields of the set to reflect hr being added to
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	131 // the set and tags the region appropriately.
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	132 inline void add(HeapRegion* hr);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	133
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	134 // It updates the fields of the set to reflect hr being removed
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	135 // from the set and tags the region appropriately.
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	136 inline void remove(HeapRegion* hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	137
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	138 // fill_in_ext_msg() writes the the values of the set's attributes
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	139 // in the custom err_msg (hrs_ext_msg). fill_in_ext_msg_extra()
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	140 // allows subclasses to append further information.
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	141 void fill_in_ext_msg(hrs_ext_msg* msg, const char* message);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	142
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	143 virtual void verify();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	144 void verify_start();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	145 void verify_next_region(HeapRegion* hr);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	146 void verify_end();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	147
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	148 #if HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	149 void verify_optional() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	150 verify();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	151 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	152 #else // HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	153 void verify_optional() { }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	154 #endif // HEAP_REGION_SET_FORCE_VERIFY
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	155
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	156 virtual void print_on(outputStream* out, bool print_contents = false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	157 };
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	158
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	159 // Customized err_msg for heap region sets. Apart from a
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	160 // assert/guarantee-specific message it also prints out the values of
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	161 // the fields of the associated set. This can be very helpful in
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	162 // diagnosing failures.
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	163 class hrs_ext_msg : public hrs_err_msg {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	164 public:
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17773 diff changeset	165 hrs_ext_msg(HeapRegionSetBase* set, const char* message) : hrs_err_msg("%s","") {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	166 set->fill_in_ext_msg(this, message);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	167 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	168 };
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	169
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	170 #define hrs_assert_sets_match(_set1_, _set2_) \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	171 do { \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	172 assert(((_set1_)->regions_humongous() == \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	173 (_set2_)->regions_humongous()) && \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	174 ((_set1_)->regions_empty() == (_set2_)->regions_empty()), \
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	175 hrs_err_msg("the contents of set %s and set %s should match", \
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	176 (_set1_)->name(), (_set2_)->name())); \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	177 } while (0)
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	178
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	179 // This class represents heap region sets whose members are not
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	180 // explicitly tracked. It's helpful to group regions using such sets
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	181 // so that we can reason about all the region groups in the heap using
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	182 // the same interface (namely, the HeapRegionSetBase API).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	183
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	184 class HeapRegionSet : public HeapRegionSetBase {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	185 public:
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	186 HeapRegionSet(const char* name, bool humongous, HRSMtSafeChecker* mt_safety_checker):
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	187 HeapRegionSetBase(name, humongous, false /* empty */, mt_safety_checker) { }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	188
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	189 void bulk_remove(const HeapRegionSetCount& removed) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	190 _count.decrement(removed.length(), removed.capacity());
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	191 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	192 };
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	193
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	194 // A set that links all the regions added to it in a doubly-linked
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	195 // list. We should try to avoid doing operations that iterate over
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	196 // such lists in performance critical paths. Typically we should
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	197 // add / remove one region at a time or concatenate two lists. There are
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	198 // two ways to treat your lists, ordered and un-ordered. All un-ordered
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	199 // operations are done in constant time. To keep a list ordered only use
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	200 // add_ordered() to add elements to the list. If a list is not ordered
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	201 // from start, there is no way to sort it later.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	202
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	203 class FreeRegionListIterator;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	204
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	205 class FreeRegionList : public HeapRegionSetBase {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	206 friend class FreeRegionListIterator;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	207
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	208 private:
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	209 HeapRegion* _head;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	210 HeapRegion* _tail;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	211
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	212 // _last is used to keep track of where we added an element the last
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	213 // time in ordered lists. It helps to improve performance when adding
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	214 // several ordered items in a row.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	215 HeapRegion* _last;
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	216
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	217 static uint _unrealistically_long_length;
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	218
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	219 void add_as_head_or_tail(FreeRegionList* from_list, bool as_head);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	220
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	221 protected:
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	222 virtual void fill_in_ext_msg_extra(hrs_ext_msg* msg);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	223
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	224 // See the comment for HeapRegionSetBase::clear()
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	225 virtual void clear();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	226
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	227 public:
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	228 FreeRegionList(const char* name, HRSMtSafeChecker* mt_safety_checker = NULL):
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	229 HeapRegionSetBase(name, false /* humongous /, true / empty */, mt_safety_checker) {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	230 clear();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	231 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	232
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	233 void verify_list();
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	234
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	235 HeapRegion* head() { return _head; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	236 HeapRegion* tail() { return _tail; }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	237
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	238 static void set_unrealistically_long_length(uint len);
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	239
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	240 // Add hr to the list. The region should not be a member of another set.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	241 // Assumes that the list is ordered and will preserve that order. The order
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	242 // is determined by hrs_index.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	243 inline void add_ordered(HeapRegion* hr);
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	244
2432 455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	245 // It adds hr to the list as the new head. The region should not be
455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	246 // a member of another set.
455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	247 inline void add_as_head(HeapRegion* hr);
455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	248
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	249 // It adds hr to the list as the new tail. The region should not be
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	250 // a member of another set.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	251 inline void add_as_tail(HeapRegion* hr);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	252
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	253 // It removes and returns the head of the list. It assumes that the
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	254 // list is not empty so it will return a non-NULL value.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	255 inline HeapRegion* remove_head();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	256
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	257 // Convenience method.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	258 inline HeapRegion* remove_head_or_null();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	259
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	260 // Removes and returns the last element (_tail) of the list. It assumes
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	261 // that the list isn't empty so that it can return a non-NULL value.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	262 inline HeapRegion* remove_tail();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	263
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	264 // Convenience method
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	265 inline HeapRegion* remove_tail_or_null();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	266
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	267 // Removes from head or tail based on the given argument.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	268 inline HeapRegion* remove_region(bool from_head);
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	269
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	270 // Merge two ordered lists. The result is also ordered. The order is
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	271 // determined by hrs_index.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	272 void add_ordered(FreeRegionList* from_list);
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	273
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	274 // It moves the regions from from_list to this list and empties
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	275 // from_list. The new regions will appear in the same order as they
2432 455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	276 // were in from_list and be linked in the beginning of this list.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	277 void add_as_head(FreeRegionList* from_list);
2432 455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	278
455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	279 // It moves the regions from from_list to this list and empties
455328d90876 7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end tonyp parents: 2361 diff changeset	280 // from_list. The new regions will appear in the same order as they
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	281 // were in from_list and be linked in the end of this list.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	282 void add_as_tail(FreeRegionList* from_list);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	283
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	284 // It empties the list by removing all regions from it.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	285 void remove_all();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	286
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	287 // It removes all regions in the list that are pending for removal
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	288 // (i.e., they have been tagged with "pending_removal"). The list
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	289 // must not be empty, target_count should reflect the exact number
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	290 // of regions that are pending for removal in the list, and
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	291 // target_count should be > 1 (currently, we never need to remove a
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	292 // single region using this).
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 4830 diff changeset	293 void remove_all_pending(uint target_count);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	294
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	295 virtual void verify();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	296
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	297 virtual void print_on(outputStream* out, bool print_contents = false);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	298 };
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	299
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	300 // Iterator class that provides a convenient way to iterate over the
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	301 // regions of a HeapRegionLinkedList instance.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	302
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	303 class FreeRegionListIterator : public StackObj {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	304 private:
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	305 FreeRegionList* _list;
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	306 HeapRegion* _curr;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	307
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	308 public:
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	309 bool more_available() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	310 return _curr != NULL;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	311 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	312
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	313 HeapRegion* get_next() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	314 assert(more_available(),
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	315 "get_next() should be called when more regions are available");
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	316
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	317 // If we are going to introduce a count in the iterator we should
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	318 // do the "cycle" check.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	319
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	320 HeapRegion* hr = _curr;
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	321 _list->verify_region(hr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	322 _curr = hr->next();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	323 return hr;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	324 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	325
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17736 diff changeset	326 FreeRegionListIterator(FreeRegionList* list) : _curr(NULL), _list(list) {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	327 _curr = list->head();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	328 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	329 };
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	330
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	331 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_HPP

Mercurial > hg > graal-jvmci-8

annotate src/share/vm/gc_implementation/g1/heapRegionSet.hpp @ 20304:a22acf6d7598