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annotate src/share/vm/gc_implementation/g1/heapRegionManager.cpp @ 20446:c10b463abc6e

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8057824: methods to copy allocation context statistics Reviewed-by: mikael, jmasa, tschatzl
author jcoomes
date Wed, 10 Sep 2014 13:01:13 -0700
parents d35872270666
children 7848fc12602b
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1 /*
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "gc_implementation/g1/heapRegion.hpp"
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27 #include "gc_implementation/g1/heapRegionManager.inline.hpp"
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28 #include "gc_implementation/g1/heapRegionSet.inline.hpp"
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29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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30 #include "gc_implementation/g1/concurrentG1Refine.hpp"
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31 #include "memory/allocation.hpp"
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32
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33 void HeapRegionManager::initialize(G1RegionToSpaceMapper* heap_storage,
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34 G1RegionToSpaceMapper* prev_bitmap,
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35 G1RegionToSpaceMapper* next_bitmap,
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36 G1RegionToSpaceMapper* bot,
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37 G1RegionToSpaceMapper* cardtable,
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38 G1RegionToSpaceMapper* card_counts) {
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39 _allocated_heapregions_length = 0;
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40
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41 _heap_mapper = heap_storage;
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42
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43 _prev_bitmap_mapper = prev_bitmap;
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44 _next_bitmap_mapper = next_bitmap;
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45
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46 _bot_mapper = bot;
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47 _cardtable_mapper = cardtable;
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48
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49 _card_counts_mapper = card_counts;
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50
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51 MemRegion reserved = heap_storage->reserved();
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52 _regions.initialize(reserved.start(), reserved.end(), HeapRegion::GrainBytes);
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53
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54 _available_map.resize(_regions.length(), false);
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55 _available_map.clear();
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56 }
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57
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58 bool HeapRegionManager::is_available(uint region) const {
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59 return _available_map.at(region);
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60 }
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61
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62 #ifdef ASSERT
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63 bool HeapRegionManager::is_free(HeapRegion* hr) const {
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64 return _free_list.contains(hr);
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65 }
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66 #endif
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67
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68 HeapRegion* HeapRegionManager::new_heap_region(uint hrm_index) {
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69 G1CollectedHeap* g1h = G1CollectedHeap::heap();
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70 HeapWord* bottom = g1h->bottom_addr_for_region(hrm_index);
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71 MemRegion mr(bottom, bottom + HeapRegion::GrainWords);
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72 assert(reserved().contains(mr), "invariant");
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73 return g1h->allocator()->new_heap_region(hrm_index, g1h->bot_shared(), mr);
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74 }
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75
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76 void HeapRegionManager::commit_regions(uint index, size_t num_regions) {
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77 guarantee(num_regions > 0, "Must commit more than zero regions");
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78 guarantee(_num_committed + num_regions <= max_length(), "Cannot commit more than the maximum amount of regions");
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79
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80 _num_committed += (uint)num_regions;
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81
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82 _heap_mapper->commit_regions(index, num_regions);
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83
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84 // Also commit auxiliary data
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85 _prev_bitmap_mapper->commit_regions(index, num_regions);
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86 _next_bitmap_mapper->commit_regions(index, num_regions);
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87
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88 _bot_mapper->commit_regions(index, num_regions);
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89 _cardtable_mapper->commit_regions(index, num_regions);
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90
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91 _card_counts_mapper->commit_regions(index, num_regions);
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92 }
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93
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94 void HeapRegionManager::uncommit_regions(uint start, size_t num_regions) {
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95 guarantee(num_regions >= 1, err_msg("Need to specify at least one region to uncommit, tried to uncommit zero regions at %u", start));
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96 guarantee(_num_committed >= num_regions, "pre-condition");
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97
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98 // Print before uncommitting.
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99 if (G1CollectedHeap::heap()->hr_printer()->is_active()) {
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100 for (uint i = start; i < start + num_regions; i++) {
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101 HeapRegion* hr = at(i);
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102 G1CollectedHeap::heap()->hr_printer()->uncommit(hr->bottom(), hr->end());
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103 }
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104 }
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105
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106 _num_committed -= (uint)num_regions;
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107
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108 _available_map.par_clear_range(start, start + num_regions, BitMap::unknown_range);
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109 _heap_mapper->uncommit_regions(start, num_regions);
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110
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111 // Also uncommit auxiliary data
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112 _prev_bitmap_mapper->uncommit_regions(start, num_regions);
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113 _next_bitmap_mapper->uncommit_regions(start, num_regions);
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114
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115 _bot_mapper->uncommit_regions(start, num_regions);
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116 _cardtable_mapper->uncommit_regions(start, num_regions);
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117
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118 _card_counts_mapper->uncommit_regions(start, num_regions);
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119 }
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120
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121 void HeapRegionManager::make_regions_available(uint start, uint num_regions) {
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122 guarantee(num_regions > 0, "No point in calling this for zero regions");
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123 commit_regions(start, num_regions);
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124 for (uint i = start; i < start + num_regions; i++) {
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125 if (_regions.get_by_index(i) == NULL) {
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126 HeapRegion* new_hr = new_heap_region(i);
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127 _regions.set_by_index(i, new_hr);
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128 _allocated_heapregions_length = MAX2(_allocated_heapregions_length, i + 1);
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129 }
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130 }
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131
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132 _available_map.par_set_range(start, start + num_regions, BitMap::unknown_range);
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133
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134 for (uint i = start; i < start + num_regions; i++) {
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135 assert(is_available(i), err_msg("Just made region %u available but is apparently not.", i));
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136 HeapRegion* hr = at(i);
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137 if (G1CollectedHeap::heap()->hr_printer()->is_active()) {
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138 G1CollectedHeap::heap()->hr_printer()->commit(hr->bottom(), hr->end());
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139 }
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140 HeapWord* bottom = G1CollectedHeap::heap()->bottom_addr_for_region(i);
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141 MemRegion mr(bottom, bottom + HeapRegion::GrainWords);
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142
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143 hr->initialize(mr);
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144 insert_into_free_list(at(i));
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145 }
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146 }
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147
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148 uint HeapRegionManager::expand_by(uint num_regions) {
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149 return expand_at(0, num_regions);
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150 }
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151
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152 uint HeapRegionManager::expand_at(uint start, uint num_regions) {
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153 if (num_regions == 0) {
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154 return 0;
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155 }
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156
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157 uint cur = start;
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158 uint idx_last_found = 0;
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159 uint num_last_found = 0;
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160
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161 uint expanded = 0;
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162
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163 while (expanded < num_regions &&
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164 (num_last_found = find_unavailable_from_idx(cur, &idx_last_found)) > 0) {
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165 uint to_expand = MIN2(num_regions - expanded, num_last_found);
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166 make_regions_available(idx_last_found, to_expand);
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167 expanded += to_expand;
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168 cur = idx_last_found + num_last_found + 1;
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169 }
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170
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171 verify_optional();
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172 return expanded;
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173 }
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174
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175 uint HeapRegionManager::find_contiguous(size_t num, bool empty_only) {
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176 uint found = 0;
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177 size_t length_found = 0;
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178 uint cur = 0;
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179
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180 while (length_found < num && cur < max_length()) {
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181 HeapRegion* hr = _regions.get_by_index(cur);
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182 if ((!empty_only && !is_available(cur)) || (is_available(cur) && hr != NULL && hr->is_empty())) {
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183 // This region is a potential candidate for allocation into.
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184 length_found++;
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185 } else {
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186 // This region is not a candidate. The next region is the next possible one.
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187 found = cur + 1;
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188 length_found = 0;
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189 }
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190 cur++;
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191 }
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192
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193 if (length_found == num) {
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194 for (uint i = found; i < (found + num); i++) {
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195 HeapRegion* hr = _regions.get_by_index(i);
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196 // sanity check
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197 guarantee((!empty_only && !is_available(i)) || (is_available(i) && hr != NULL && hr->is_empty()),
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198 err_msg("Found region sequence starting at " UINT32_FORMAT ", length " SIZE_FORMAT
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199 " that is not empty at " UINT32_FORMAT ". Hr is " PTR_FORMAT, found, num, i, p2i(hr)));
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200 }
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201 return found;
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202 } else {
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203 return G1_NO_HRM_INDEX;
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204 }
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205 }
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206
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207 HeapRegion* HeapRegionManager::next_region_in_heap(const HeapRegion* r) const {
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208 guarantee(r != NULL, "Start region must be a valid region");
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209 guarantee(is_available(r->hrm_index()), err_msg("Trying to iterate starting from region %u which is not in the heap", r->hrm_index()));
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210 for (uint i = r->hrm_index() + 1; i < _allocated_heapregions_length; i++) {
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211 HeapRegion* hr = _regions.get_by_index(i);
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212 if (is_available(i)) {
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213 return hr;
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214 }
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215 }
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216 return NULL;
342
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217 }
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218
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219 void HeapRegionManager::iterate(HeapRegionClosure* blk) const {
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220 uint len = max_length();
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221
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222 for (uint i = 0; i < len; i++) {
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223 if (!is_available(i)) {
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224 continue;
342
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225 }
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226 guarantee(at(i) != NULL, err_msg("Tried to access region %u that has a NULL HeapRegion*", i));
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227 bool res = blk->doHeapRegion(at(i));
342
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228 if (res) {
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229 blk->incomplete();
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230 return;
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diff changeset
231 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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232 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
233 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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234
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235 uint HeapRegionManager::find_unavailable_from_idx(uint start_idx, uint* res_idx) const {
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236 guarantee(res_idx != NULL, "checking");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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237 guarantee(start_idx <= (max_length() + 1), "checking");
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238
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239 uint num_regions = 0;
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240
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241 uint cur = start_idx;
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242 while (cur < max_length() && is_available(cur)) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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243 cur++;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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244 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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245 if (cur == max_length()) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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246 return num_regions;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
247 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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248 *res_idx = cur;
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249 while (cur < max_length() && !is_available(cur)) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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250 cur++;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
251 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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252 num_regions = cur - *res_idx;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
253 #ifdef ASSERT
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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254 for (uint i = *res_idx; i < (*res_idx + num_regions); i++) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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255 assert(!is_available(i), "just checking");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
256 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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257 assert(cur == max_length() || num_regions == 0 || is_available(cur),
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258 err_msg("The region at the current position %u must be available or at the end of the heap.", cur));
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diff changeset
259 #endif
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260 return num_regions;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
261 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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262
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diff changeset
263 uint HeapRegionManager::start_region_for_worker(uint worker_i, uint num_workers, uint num_regions) const {
20336
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264 return num_regions * worker_i / num_workers;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
265 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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266
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267 void HeapRegionManager::par_iterate(HeapRegionClosure* blk, uint worker_id, uint num_workers, jint claim_value) const {
20336
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268 const uint start_index = start_region_for_worker(worker_id, num_workers, _allocated_heapregions_length);
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269
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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270 // Every worker will actually look at all regions, skipping over regions that
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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271 // are currently not committed.
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272 // This also (potentially) iterates over regions newly allocated during GC. This
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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273 // is no problem except for some extra work.
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diff changeset
274 for (uint count = 0; count < _allocated_heapregions_length; count++) {
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275 const uint index = (start_index + count) % _allocated_heapregions_length;
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276 assert(0 <= index && index < _allocated_heapregions_length, "sanity");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
277 // Skip over unavailable regions
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
278 if (!is_available(index)) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
279 continue;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
280 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
281 HeapRegion* r = _regions.get_by_index(index);
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282 // We'll ignore "continues humongous" regions (we'll process them
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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283 // when we come across their corresponding "start humongous"
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
284 // region) and regions already claimed.
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
285 if (r->claim_value() == claim_value || r->continuesHumongous()) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
286 continue;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
287 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
288 // OK, try to claim it
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
289 if (!r->claimHeapRegion(claim_value)) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
290 continue;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
291 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
292 // Success!
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
293 if (r->startsHumongous()) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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294 // If the region is "starts humongous" we'll iterate over its
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295 // "continues humongous" first; in fact we'll do them
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296 // first. The order is important. In one case, calling the
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297 // closure on the "starts humongous" region might de-allocate
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298 // and clear all its "continues humongous" regions and, as a
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299 // result, we might end up processing them twice. So, we'll do
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300 // them first (note: most closures will ignore them anyway) and
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301 // then we'll do the "starts humongous" region.
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302 for (uint ch_index = index + 1; ch_index < index + r->region_num(); ch_index++) {
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303 HeapRegion* chr = _regions.get_by_index(ch_index);
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304
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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305 assert(chr->continuesHumongous(), "Must be humongous region");
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306 assert(chr->humongous_start_region() == r,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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307 err_msg("Must work on humongous continuation of the original start region "
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308 PTR_FORMAT ", but is " PTR_FORMAT, p2i(r), p2i(chr)));
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309 assert(chr->claim_value() != claim_value,
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310 "Must not have been claimed yet because claiming of humongous continuation first claims the start region");
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311
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312 bool claim_result = chr->claimHeapRegion(claim_value);
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313 // We should always be able to claim it; no one else should
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314 // be trying to claim this region.
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315 guarantee(claim_result, "We should always be able to claim the continuesHumongous part of the humongous object");
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316
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317 bool res2 = blk->doHeapRegion(chr);
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318 if (res2) {
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319 return;
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320 }
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321
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322 // Right now, this holds (i.e., no closure that actually
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323 // does something with "continues humongous" regions
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324 // clears them). We might have to weaken it in the future,
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325 // but let's leave these two asserts here for extra safety.
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326 assert(chr->continuesHumongous(), "should still be the case");
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327 assert(chr->humongous_start_region() == r, "sanity");
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328 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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329 }
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330
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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331 bool res = blk->doHeapRegion(r);
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332 if (res) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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333 return;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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334 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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335 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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336 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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337
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338 uint HeapRegionManager::shrink_by(uint num_regions_to_remove) {
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339 assert(length() > 0, "the region sequence should not be empty");
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340 assert(length() <= _allocated_heapregions_length, "invariant");
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341 assert(_allocated_heapregions_length > 0, "we should have at least one region committed");
10242
b0d20fa374b4 8013872: G1: HeapRegionSeq::shrink_by() has invalid assert
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342 assert(num_regions_to_remove < length(), "We should never remove all regions");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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343
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344 if (num_regions_to_remove == 0) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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345 return 0;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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346 }
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347
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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348 uint removed = 0;
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349 uint cur = _allocated_heapregions_length - 1;
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350 uint idx_last_found = 0;
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351 uint num_last_found = 0;
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352
20337
1f1d373cd044 8038423: G1: Decommit memory within heap
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353 while ((removed < num_regions_to_remove) &&
1f1d373cd044 8038423: G1: Decommit memory within heap
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354 (num_last_found = find_empty_from_idx_reverse(cur, &idx_last_found)) > 0) {
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355 uint to_remove = MIN2(num_regions_to_remove - removed, num_last_found);
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356
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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357 uncommit_regions(idx_last_found + num_last_found - to_remove, to_remove);
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358
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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359 cur -= num_last_found;
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360 removed += to_remove;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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361 }
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362
20336
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363 verify_optional();
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
364
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
365 return removed;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
366 }
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diff changeset
367
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368 uint HeapRegionManager::find_empty_from_idx_reverse(uint start_idx, uint* res_idx) const {
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
369 guarantee(start_idx < _allocated_heapregions_length, "checking");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
370 guarantee(res_idx != NULL, "checking");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
371
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
372 uint num_regions_found = 0;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
373
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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374 jlong cur = start_idx;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
375 while (cur != -1 && !(is_available(cur) && at(cur)->is_empty())) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
376 cur--;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
377 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
378 if (cur == -1) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
379 return num_regions_found;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
380 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
381 jlong old_cur = cur;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
382 // cur indexes the first empty region
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
383 while (cur != -1 && is_available(cur) && at(cur)->is_empty()) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
384 cur--;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
385 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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parents: 20335
diff changeset
386 *res_idx = cur + 1;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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parents: 20335
diff changeset
387 num_regions_found = old_cur - cur;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
388
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
389 #ifdef ASSERT
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
390 for (uint i = *res_idx; i < (*res_idx + num_regions_found); i++) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
391 assert(at(i)->is_empty(), "just checking");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
392 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
393 #endif
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
394 return num_regions_found;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
395 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff changeset
396
20377
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager
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diff changeset
397 void HeapRegionManager::verify() {
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
398 guarantee(length() <= _allocated_heapregions_length,
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 3766
diff changeset
399 err_msg("invariant: _length: %u _allocated_length: %u",
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff changeset
400 length(), _allocated_heapregions_length));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff changeset
401 guarantee(_allocated_heapregions_length <= max_length(),
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 3766
diff changeset
402 err_msg("invariant: _allocated_length: %u _max_length: %u",
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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parents: 20335
diff changeset
403 _allocated_heapregions_length, max_length()));
3766
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
404
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
405 bool prev_committed = true;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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parents: 20335
diff changeset
406 uint num_committed = 0;
12305
a19bea467577 7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents: 10242
diff changeset
407 HeapWord* prev_end = heap_bottom();
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
408 for (uint i = 0; i < _allocated_heapregions_length; i++) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
409 if (!is_available(i)) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
410 prev_committed = false;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
411 continue;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
412 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
413 num_committed++;
12305
a19bea467577 7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents: 10242
diff changeset
414 HeapRegion* hr = _regions.get_by_index(i);
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 3766
diff changeset
415 guarantee(hr != NULL, err_msg("invariant: i: %u", i));
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff changeset
416 guarantee(!prev_committed || hr->bottom() == prev_end,
6010
720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents: 3766
diff changeset
417 err_msg("invariant i: %u "HR_FORMAT" prev_end: "PTR_FORMAT,
17937
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 17736
diff changeset
418 i, HR_FORMAT_PARAMS(hr), p2i(prev_end)));
20377
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents: 20337
diff changeset
419 guarantee(hr->hrm_index() == i,
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents: 20337
diff changeset
420 err_msg("invariant: i: %u hrm_index(): %u", i, hr->hrm_index()));
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
421 // Asserts will fire if i is >= _length
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff changeset
422 HeapWord* addr = hr->bottom();
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff changeset
423 guarantee(addr_to_region(addr) == hr, "sanity");
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
424 // We cannot check whether the region is part of a particular set: at the time
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
425 // this method may be called, we have only completed allocation of the regions,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
426 // but not put into a region set.
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
427 prev_committed = true;
3766
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
428 if (hr->startsHumongous()) {
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
429 prev_end = hr->orig_end();
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
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diff changeset
430 } else {
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
431 prev_end = hr->end();
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
432 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
433 }
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff changeset
434 for (uint i = _allocated_heapregions_length; i < max_length(); i++) {
12305
a19bea467577 7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents: 10242
diff changeset
435 guarantee(_regions.get_by_index(i) == NULL, err_msg("invariant i: %u", i));
3766
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
436 }
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
437
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
438 guarantee(num_committed == _num_committed, err_msg("Found %u committed regions, but should be %u", num_committed, _num_committed));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
439 _free_list.verify();
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
440 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
441
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
442 #ifndef PRODUCT
20377
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents: 20337
diff changeset
443 void HeapRegionManager::verify_optional() {
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
444 verify();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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445 }
3766
c3f1170908be 7045330: G1: Simplify/fix the HeapRegionSeq class
tonyp
parents: 2361
diff changeset
446 #endif // PRODUCT
20336
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents: 20335
diff changeset
447