annotate src/share/vm/gc_implementation/g1/heapRegion.cpp @ 1930:2d26b0046e0d

Merge.
author Thomas Wuerthinger <wuerthinger@ssw.jku.at>
date Tue, 30 Nov 2010 14:53:30 +0100
parents 0ba67bb5392c 72a161e62cc4
children 06f017f7daa7
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1 /*
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2 * Copyright (c) 2001, 2010, 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 "incls/_precompiled.incl"
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26 #include "incls/_heapRegion.cpp.incl"
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27
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28 int HeapRegion::LogOfHRGrainBytes = 0;
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29 int HeapRegion::LogOfHRGrainWords = 0;
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30 int HeapRegion::GrainBytes = 0;
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31 int HeapRegion::GrainWords = 0;
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32 int HeapRegion::CardsPerRegion = 0;
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33
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34 HeapRegionDCTOC::HeapRegionDCTOC(G1CollectedHeap* g1,
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35 HeapRegion* hr, OopClosure* cl,
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36 CardTableModRefBS::PrecisionStyle precision,
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37 FilterKind fk) :
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38 ContiguousSpaceDCTOC(hr, cl, precision, NULL),
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39 _hr(hr), _fk(fk), _g1(g1)
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40 {}
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41
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42 FilterOutOfRegionClosure::FilterOutOfRegionClosure(HeapRegion* r,
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43 OopClosure* oc) :
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44 _r_bottom(r->bottom()), _r_end(r->end()),
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45 _oc(oc), _out_of_region(0)
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46 {}
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47
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48 class VerifyLiveClosure: public OopClosure {
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49 private:
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50 G1CollectedHeap* _g1h;
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51 CardTableModRefBS* _bs;
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52 oop _containing_obj;
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53 bool _failures;
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54 int _n_failures;
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55 bool _use_prev_marking;
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56 public:
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57 // use_prev_marking == true -> use "prev" marking information,
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58 // use_prev_marking == false -> use "next" marking information
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59 VerifyLiveClosure(G1CollectedHeap* g1h, bool use_prev_marking) :
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60 _g1h(g1h), _bs(NULL), _containing_obj(NULL),
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61 _failures(false), _n_failures(0), _use_prev_marking(use_prev_marking)
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62 {
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63 BarrierSet* bs = _g1h->barrier_set();
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64 if (bs->is_a(BarrierSet::CardTableModRef))
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65 _bs = (CardTableModRefBS*)bs;
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66 }
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67
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68 void set_containing_obj(oop obj) {
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69 _containing_obj = obj;
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70 }
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71
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72 bool failures() { return _failures; }
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73 int n_failures() { return _n_failures; }
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74
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75 virtual void do_oop(narrowOop* p) { do_oop_work(p); }
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76 virtual void do_oop( oop* p) { do_oop_work(p); }
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77
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78 void print_object(outputStream* out, oop obj) {
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79 #ifdef PRODUCT
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80 klassOop k = obj->klass();
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81 const char* class_name = instanceKlass::cast(k)->external_name();
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82 out->print_cr("class name %s", class_name);
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83 #else // PRODUCT
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84 obj->print_on(out);
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85 #endif // PRODUCT
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86 }
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87
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88 template <class T> void do_oop_work(T* p) {
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89 assert(_containing_obj != NULL, "Precondition");
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90 assert(!_g1h->is_obj_dead_cond(_containing_obj, _use_prev_marking),
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91 "Precondition");
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92 T heap_oop = oopDesc::load_heap_oop(p);
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93 if (!oopDesc::is_null(heap_oop)) {
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94 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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95 bool failed = false;
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96 if (!_g1h->is_in_closed_subset(obj) ||
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97 _g1h->is_obj_dead_cond(obj, _use_prev_marking)) {
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98 if (!_failures) {
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99 gclog_or_tty->print_cr("");
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100 gclog_or_tty->print_cr("----------");
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101 }
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102 if (!_g1h->is_in_closed_subset(obj)) {
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103 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
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104 gclog_or_tty->print_cr("Field "PTR_FORMAT
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105 " of live obj "PTR_FORMAT" in region "
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106 "["PTR_FORMAT", "PTR_FORMAT")",
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107 p, (void*) _containing_obj,
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108 from->bottom(), from->end());
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109 print_object(gclog_or_tty, _containing_obj);
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110 gclog_or_tty->print_cr("points to obj "PTR_FORMAT" not in the heap",
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111 (void*) obj);
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112 } else {
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113 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
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114 HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj);
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115 gclog_or_tty->print_cr("Field "PTR_FORMAT
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116 " of live obj "PTR_FORMAT" in region "
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117 "["PTR_FORMAT", "PTR_FORMAT")",
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118 p, (void*) _containing_obj,
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119 from->bottom(), from->end());
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120 print_object(gclog_or_tty, _containing_obj);
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121 gclog_or_tty->print_cr("points to dead obj "PTR_FORMAT" in region "
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122 "["PTR_FORMAT", "PTR_FORMAT")",
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123 (void*) obj, to->bottom(), to->end());
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124 print_object(gclog_or_tty, obj);
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125 }
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126 gclog_or_tty->print_cr("----------");
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127 _failures = true;
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128 failed = true;
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129 _n_failures++;
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130 }
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131
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132 if (!_g1h->full_collection()) {
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133 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
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134 HeapRegion* to = _g1h->heap_region_containing(obj);
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135 if (from != NULL && to != NULL &&
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136 from != to &&
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137 !to->isHumongous()) {
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138 jbyte cv_obj = *_bs->byte_for_const(_containing_obj);
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139 jbyte cv_field = *_bs->byte_for_const(p);
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140 const jbyte dirty = CardTableModRefBS::dirty_card_val();
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141
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142 bool is_bad = !(from->is_young()
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143 || to->rem_set()->contains_reference(p)
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144 || !G1HRRSFlushLogBuffersOnVerify && // buffers were not flushed
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145 (_containing_obj->is_objArray() ?
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146 cv_field == dirty
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147 : cv_obj == dirty || cv_field == dirty));
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148 if (is_bad) {
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149 if (!_failures) {
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150 gclog_or_tty->print_cr("");
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151 gclog_or_tty->print_cr("----------");
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152 }
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153 gclog_or_tty->print_cr("Missing rem set entry:");
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154 gclog_or_tty->print_cr("Field "PTR_FORMAT
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155 " of obj "PTR_FORMAT
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156 ", in region %d ["PTR_FORMAT
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157 ", "PTR_FORMAT"),",
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158 p, (void*) _containing_obj,
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159 from->hrs_index(),
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160 from->bottom(),
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161 from->end());
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162 _containing_obj->print_on(gclog_or_tty);
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163 gclog_or_tty->print_cr("points to obj "PTR_FORMAT
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164 " in region %d ["PTR_FORMAT
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165 ", "PTR_FORMAT").",
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166 (void*) obj, to->hrs_index(),
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167 to->bottom(), to->end());
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168 obj->print_on(gclog_or_tty);
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169 gclog_or_tty->print_cr("Obj head CTE = %d, field CTE = %d.",
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170 cv_obj, cv_field);
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171 gclog_or_tty->print_cr("----------");
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172 _failures = true;
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173 if (!failed) _n_failures++;
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174 }
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175 }
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176 }
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177 }
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178 }
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179 };
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180
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181 template<class ClosureType>
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182 HeapWord* walk_mem_region_loop(ClosureType* cl, G1CollectedHeap* g1h,
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183 HeapRegion* hr,
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184 HeapWord* cur, HeapWord* top) {
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185 oop cur_oop = oop(cur);
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186 int oop_size = cur_oop->size();
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187 HeapWord* next_obj = cur + oop_size;
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188 while (next_obj < top) {
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189 // Keep filtering the remembered set.
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190 if (!g1h->is_obj_dead(cur_oop, hr)) {
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191 // Bottom lies entirely below top, so we can call the
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192 // non-memRegion version of oop_iterate below.
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193 cur_oop->oop_iterate(cl);
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194 }
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195 cur = next_obj;
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196 cur_oop = oop(cur);
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197 oop_size = cur_oop->size();
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198 next_obj = cur + oop_size;
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199 }
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200 return cur;
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201 }
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202
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203 void HeapRegionDCTOC::walk_mem_region_with_cl(MemRegion mr,
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204 HeapWord* bottom,
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205 HeapWord* top,
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206 OopClosure* cl) {
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207 G1CollectedHeap* g1h = _g1;
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208
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209 int oop_size;
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210
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211 OopClosure* cl2 = cl;
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212 FilterIntoCSClosure intoCSFilt(this, g1h, cl);
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213 FilterOutOfRegionClosure outOfRegionFilt(_hr, cl);
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214 switch (_fk) {
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215 case IntoCSFilterKind: cl2 = &intoCSFilt; break;
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216 case OutOfRegionFilterKind: cl2 = &outOfRegionFilt; break;
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217 }
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218
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219 // Start filtering what we add to the remembered set. If the object is
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220 // not considered dead, either because it is marked (in the mark bitmap)
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221 // or it was allocated after marking finished, then we add it. Otherwise
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222 // we can safely ignore the object.
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223 if (!g1h->is_obj_dead(oop(bottom), _hr)) {
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224 oop_size = oop(bottom)->oop_iterate(cl2, mr);
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225 } else {
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226 oop_size = oop(bottom)->size();
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227 }
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228
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229 bottom += oop_size;
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230
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231 if (bottom < top) {
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232 // We replicate the loop below for several kinds of possible filters.
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233 switch (_fk) {
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234 case NoFilterKind:
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235 bottom = walk_mem_region_loop(cl, g1h, _hr, bottom, top);
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236 break;
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237 case IntoCSFilterKind: {
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238 FilterIntoCSClosure filt(this, g1h, cl);
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239 bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top);
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240 break;
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241 }
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242 case OutOfRegionFilterKind: {
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243 FilterOutOfRegionClosure filt(_hr, cl);
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244 bottom = walk_mem_region_loop(&filt, g1h, _hr, bottom, top);
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245 break;
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246 }
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247 default:
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248 ShouldNotReachHere();
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249 }
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250
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251 // Last object. Need to do dead-obj filtering here too.
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252 if (!g1h->is_obj_dead(oop(bottom), _hr)) {
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253 oop(bottom)->oop_iterate(cl2, mr);
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254 }
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255 }
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256 }
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257
942
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258 // Minimum region size; we won't go lower than that.
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259 // We might want to decrease this in the future, to deal with small
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260 // heaps a bit more efficiently.
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261 #define MIN_REGION_SIZE ( 1024 * 1024 )
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262
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263 // Maximum region size; we don't go higher than that. There's a good
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264 // reason for having an upper bound. We don't want regions to get too
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265 // large, otherwise cleanup's effectiveness would decrease as there
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266 // will be fewer opportunities to find totally empty regions after
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267 // marking.
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268 #define MAX_REGION_SIZE ( 32 * 1024 * 1024 )
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269
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270 // The automatic region size calculation will try to have around this
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271 // many regions in the heap (based on the min heap size).
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272 #define TARGET_REGION_NUMBER 2048
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273
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274 void HeapRegion::setup_heap_region_size(uintx min_heap_size) {
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275 // region_size in bytes
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276 uintx region_size = G1HeapRegionSize;
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277 if (FLAG_IS_DEFAULT(G1HeapRegionSize)) {
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278 // We base the automatic calculation on the min heap size. This
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279 // can be problematic if the spread between min and max is quite
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280 // wide, imagine -Xms128m -Xmx32g. But, if we decided it based on
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281 // the max size, the region size might be way too large for the
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282 // min size. Either way, some users might have to set the region
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283 // size manually for some -Xms / -Xmx combos.
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284
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285 region_size = MAX2(min_heap_size / TARGET_REGION_NUMBER,
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286 (uintx) MIN_REGION_SIZE);
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287 }
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288
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289 int region_size_log = log2_long((jlong) region_size);
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290 // Recalculate the region size to make sure it's a power of
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291 // 2. This means that region_size is the largest power of 2 that's
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292 // <= what we've calculated so far.
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293 region_size = ((uintx)1 << region_size_log);
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294
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295 // Now make sure that we don't go over or under our limits.
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296 if (region_size < MIN_REGION_SIZE) {
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297 region_size = MIN_REGION_SIZE;
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298 } else if (region_size > MAX_REGION_SIZE) {
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299 region_size = MAX_REGION_SIZE;
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300 }
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301
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302 // And recalculate the log.
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303 region_size_log = log2_long((jlong) region_size);
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304
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305 // Now, set up the globals.
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306 guarantee(LogOfHRGrainBytes == 0, "we should only set it once");
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307 LogOfHRGrainBytes = region_size_log;
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308
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309 guarantee(LogOfHRGrainWords == 0, "we should only set it once");
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310 LogOfHRGrainWords = LogOfHRGrainBytes - LogHeapWordSize;
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311
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312 guarantee(GrainBytes == 0, "we should only set it once");
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313 // The cast to int is safe, given that we've bounded region_size by
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314 // MIN_REGION_SIZE and MAX_REGION_SIZE.
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315 GrainBytes = (int) region_size;
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316
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317 guarantee(GrainWords == 0, "we should only set it once");
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318 GrainWords = GrainBytes >> LogHeapWordSize;
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319 guarantee(1 << LogOfHRGrainWords == GrainWords, "sanity");
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320
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321 guarantee(CardsPerRegion == 0, "we should only set it once");
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322 CardsPerRegion = GrainBytes >> CardTableModRefBS::card_shift;
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323 }
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324
342
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325 void HeapRegion::reset_after_compaction() {
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326 G1OffsetTableContigSpace::reset_after_compaction();
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327 // After a compaction the mark bitmap is invalid, so we must
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328 // treat all objects as being inside the unmarked area.
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329 zero_marked_bytes();
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330 init_top_at_mark_start();
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331 }
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332
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333 DirtyCardToOopClosure*
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334 HeapRegion::new_dcto_closure(OopClosure* cl,
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335 CardTableModRefBS::PrecisionStyle precision,
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336 HeapRegionDCTOC::FilterKind fk) {
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337 return new HeapRegionDCTOC(G1CollectedHeap::heap(),
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338 this, cl, precision, fk);
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339 }
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340
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341 void HeapRegion::hr_clear(bool par, bool clear_space) {
355
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342 _humongous_type = NotHumongous;
342
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343 _humongous_start_region = NULL;
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344 _in_collection_set = false;
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345 _is_gc_alloc_region = false;
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346
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347 // Age stuff (if parallel, this will be done separately, since it needs
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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348 // to be sequential).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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349 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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350
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351 set_young_index_in_cset(-1);
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352 uninstall_surv_rate_group();
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353 set_young_type(NotYoung);
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354
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355 // In case it had been the start of a humongous sequence, reset its end.
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356 set_end(_orig_end);
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357
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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358 if (!par) {
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359 // If this is parallel, this will be done later.
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360 HeapRegionRemSet* hrrs = rem_set();
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361 if (hrrs != NULL) hrrs->clear();
355
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362 _claimed = InitialClaimValue;
342
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363 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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364 zero_marked_bytes();
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365 set_sort_index(-1);
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366
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367 _offsets.resize(HeapRegion::GrainWords);
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368 init_top_at_mark_start();
356
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369 if (clear_space) clear(SpaceDecorator::Mangle);
342
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370 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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371
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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372 // <PREDICTION>
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373 void HeapRegion::calc_gc_efficiency() {
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374 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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375 _gc_efficiency = (double) garbage_bytes() /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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376 g1h->predict_region_elapsed_time_ms(this, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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377 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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378 // </PREDICTION>
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379
1886
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380 void HeapRegion::set_startsHumongous(HeapWord* new_end) {
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381 assert(end() == _orig_end,
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382 "Should be normal before the humongous object allocation");
72a161e62cc4 6991377: G1: race between concurrent refinement and humongous object allocation
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383 assert(top() == bottom(), "should be empty");
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384
355
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385 _humongous_type = StartsHumongous;
342
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386 _humongous_start_region = this;
1886
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387
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388 set_end(new_end);
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389 _offsets.set_for_starts_humongous(new_end);
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390 }
72a161e62cc4 6991377: G1: race between concurrent refinement and humongous object allocation
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391
72a161e62cc4 6991377: G1: race between concurrent refinement and humongous object allocation
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392 void HeapRegion::set_continuesHumongous(HeapRegion* start) {
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393 assert(end() == _orig_end,
72a161e62cc4 6991377: G1: race between concurrent refinement and humongous object allocation
tonyp
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394 "Should be normal before the humongous object allocation");
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395 assert(top() == bottom(), "should be empty");
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396 assert(start->startsHumongous(), "pre-condition");
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397
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398 _humongous_type = ContinuesHumongous;
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399 _humongous_start_region = start;
342
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400 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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401
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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402 bool HeapRegion::claimHeapRegion(jint claimValue) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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403 jint current = _claimed;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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404 if (current != claimValue) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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405 jint res = Atomic::cmpxchg(claimValue, &_claimed, current);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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406 if (res == current) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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407 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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408 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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409 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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410 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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411 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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412
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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413 HeapWord* HeapRegion::next_block_start_careful(HeapWord* addr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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414 HeapWord* low = addr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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415 HeapWord* high = end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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416 while (low < high) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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417 size_t diff = pointer_delta(high, low);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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418 // Must add one below to bias toward the high amount. Otherwise, if
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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419 // "high" were at the desired value, and "low" were one less, we
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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420 // would not converge on "high". This is not symmetric, because
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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421 // we set "high" to a block start, which might be the right one,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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422 // which we don't do for "low".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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423 HeapWord* middle = low + (diff+1)/2;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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424 if (middle == high) return high;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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425 HeapWord* mid_bs = block_start_careful(middle);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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426 if (mid_bs < addr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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427 low = middle;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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428 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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429 high = mid_bs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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430 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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431 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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432 assert(low == high && low >= addr, "Didn't work.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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433 return low;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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434 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
435
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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436 void HeapRegion::set_next_on_unclean_list(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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437 assert(r == NULL || r->is_on_unclean_list(), "Malformed unclean list.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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438 _next_in_special_set = r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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439 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
440
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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441 void HeapRegion::set_on_unclean_list(bool b) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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442 _is_on_unclean_list = b;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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443 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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444
356
tonyp
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diff changeset
445 void HeapRegion::initialize(MemRegion mr, bool clear_space, bool mangle_space) {
tonyp
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446 G1OffsetTableContigSpace::initialize(mr, false, mangle_space);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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447 hr_clear(false/*par*/, clear_space);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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448 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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449 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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450 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
451 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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452
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
453
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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454 HeapRegion::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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455 HeapRegion(G1BlockOffsetSharedArray* sharedOffsetArray,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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456 MemRegion mr, bool is_zeroed)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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457 : G1OffsetTableContigSpace(sharedOffsetArray, mr, is_zeroed),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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458 _next_fk(HeapRegionDCTOC::NoFilterKind),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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459 _hrs_index(-1),
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
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460 _humongous_type(NotHumongous), _humongous_start_region(NULL),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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461 _in_collection_set(false), _is_gc_alloc_region(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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462 _is_on_free_list(false), _is_on_unclean_list(false),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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463 _next_in_special_set(NULL), _orig_end(NULL),
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
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diff changeset
464 _claimed(InitialClaimValue), _evacuation_failed(false),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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465 _prev_marked_bytes(0), _next_marked_bytes(0), _sort_index(-1),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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466 _young_type(NotYoung), _next_young_region(NULL),
796
29e7d79232b9 6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff changeset
467 _next_dirty_cards_region(NULL),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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468 _young_index_in_cset(-1), _surv_rate_group(NULL), _age_index(-1),
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1388
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469 _rem_set(NULL), _zfs(NotZeroFilled),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1388
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470 _recorded_rs_length(0), _predicted_elapsed_time_ms(0),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff changeset
471 _predicted_bytes_to_copy(0)
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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472 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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473 _orig_end = mr.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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474 // Note that initialize() will set the start of the unmarked area of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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475 // region.
356
tonyp
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diff changeset
476 this->initialize(mr, !is_zeroed, SpaceDecorator::Mangle);
tonyp
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diff changeset
477 set_top(bottom());
tonyp
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diff changeset
478 set_saved_mark();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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479
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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480 _rem_set = new HeapRegionRemSet(sharedOffsetArray, this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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481
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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482 assert(HeapRegionRemSet::num_par_rem_sets() > 0, "Invariant.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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483 // In case the region is allocated during a pause, note the top.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
484 // We haven't done any counting on a brand new region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
485 _top_at_conc_mark_count = bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
486 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
487
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
488 class NextCompactionHeapRegionClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
489 const HeapRegion* _target;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
490 bool _target_seen;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
491 HeapRegion* _last;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
492 CompactibleSpace* _res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
493 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
494 NextCompactionHeapRegionClosure(const HeapRegion* target) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
495 _target(target), _target_seen(false), _res(NULL) {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
496 bool doHeapRegion(HeapRegion* cur) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
497 if (_target_seen) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
498 if (!cur->isHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
499 _res = cur;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
500 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
501 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
502 } else if (cur == _target) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
503 _target_seen = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
504 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
505 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
506 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
507 CompactibleSpace* result() { return _res; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
508 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
509
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
510 CompactibleSpace* HeapRegion::next_compaction_space() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
511 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
512 // cast away const-ness
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
513 HeapRegion* r = (HeapRegion*) this;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
514 NextCompactionHeapRegionClosure blk(r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
515 g1h->heap_region_iterate_from(r, &blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
516 return blk.result();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
517 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
518
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
519 void HeapRegion::save_marks() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
520 set_saved_mark();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
521 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
522
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
523 void HeapRegion::oops_in_mr_iterate(MemRegion mr, OopClosure* cl) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
524 HeapWord* p = mr.start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
525 HeapWord* e = mr.end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
526 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
527 while (p < e) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
528 obj = oop(p);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
529 p += obj->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
530 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
531 assert(p == e, "bad memregion: doesn't end on obj boundary");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
532 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
533
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
534 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN(OopClosureType, nv_suffix) \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
535 void HeapRegion::oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl) { \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
536 ContiguousSpace::oop_since_save_marks_iterate##nv_suffix(cl); \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
537 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
538 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DEFN)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
539
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
540
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
541 void HeapRegion::oop_before_save_marks_iterate(OopClosure* cl) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
542 oops_in_mr_iterate(MemRegion(bottom(), saved_mark_word()), cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
543 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
544
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
545 #ifdef DEBUG
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
546 HeapWord* HeapRegion::allocate(size_t size) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
547 jint state = zero_fill_state();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
548 assert(!G1CollectedHeap::heap()->allocs_are_zero_filled() ||
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
549 zero_fill_is_allocated(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
550 "When ZF is on, only alloc in ZF'd regions");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
551 return G1OffsetTableContigSpace::allocate(size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
552 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
553 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
554
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
555 void HeapRegion::set_zero_fill_state_work(ZeroFillState zfs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
556 assert(ZF_mon->owned_by_self() ||
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
557 Universe::heap()->is_gc_active(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
558 "Must hold the lock or be a full GC to modify.");
1545
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
559 #ifdef ASSERT
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
560 if (top() != bottom() && zfs != Allocated) {
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
561 ResourceMark rm;
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
562 stringStream region_str;
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
563 print_on(&region_str);
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
564 assert(top() == bottom() || zfs == Allocated,
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
565 err_msg("Region must be empty, or we must be setting it to allocated. "
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
566 "_zfs=%d, zfs=%d, region: %s", _zfs, zfs, region_str.as_string()));
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
567 }
cc387008223e 6921317: (partial) G1: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to
apetrusenko
parents: 1394
diff changeset
568 #endif
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
569 _zfs = zfs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
570 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
571
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
572 void HeapRegion::set_zero_fill_complete() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
573 set_zero_fill_state_work(ZeroFilled);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
574 if (ZF_mon->owned_by_self()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
575 ZF_mon->notify_all();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
576 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
577 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
578
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
579
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
580 void HeapRegion::ensure_zero_filled() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
581 MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
582 ensure_zero_filled_locked();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
583 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
584
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
585 void HeapRegion::ensure_zero_filled_locked() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
586 assert(ZF_mon->owned_by_self(), "Precondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
587 bool should_ignore_zf = SafepointSynchronize::is_at_safepoint();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
588 assert(should_ignore_zf || Heap_lock->is_locked(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
589 "Either we're in a GC or we're allocating a region.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
590 switch (zero_fill_state()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
591 case HeapRegion::NotZeroFilled:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
592 set_zero_fill_in_progress(Thread::current());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
593 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
594 ZF_mon->unlock();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
595 Copy::fill_to_words(bottom(), capacity()/HeapWordSize);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
596 ZF_mon->lock_without_safepoint_check();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
597 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
598 // A trap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
599 guarantee(zero_fill_state() == HeapRegion::ZeroFilling
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
600 && zero_filler() == Thread::current(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
601 "AHA! Tell Dave D if you see this...");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
602 set_zero_fill_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
603 // gclog_or_tty->print_cr("Did sync ZF.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
604 ConcurrentZFThread::note_sync_zfs();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
605 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
606 case HeapRegion::ZeroFilling:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
607 if (should_ignore_zf) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
608 // We can "break" the lock and take over the work.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
609 Copy::fill_to_words(bottom(), capacity()/HeapWordSize);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
610 set_zero_fill_complete();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
611 ConcurrentZFThread::note_sync_zfs();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
612 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
613 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
614 ConcurrentZFThread::wait_for_ZF_completed(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
615 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
616 case HeapRegion::ZeroFilled:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
617 // Nothing to do.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
618 break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
619 case HeapRegion::Allocated:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
620 guarantee(false, "Should not call on allocated regions.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
621 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
622 assert(zero_fill_state() == HeapRegion::ZeroFilled, "Post");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
623 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
624
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
625 HeapWord*
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
626 HeapRegion::object_iterate_mem_careful(MemRegion mr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
627 ObjectClosure* cl) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
628 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
629 // We used to use "block_start_careful" here. But we're actually happy
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
630 // to update the BOT while we do this...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
631 HeapWord* cur = block_start(mr.start());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
632 mr = mr.intersection(used_region());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
633 if (mr.is_empty()) return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
634 // Otherwise, find the obj that extends onto mr.start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
635
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
636 assert(cur <= mr.start()
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
637 && (oop(cur)->klass_or_null() == NULL ||
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
638 cur + oop(cur)->size() > mr.start()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
639 "postcondition of block_start");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
640 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
641 while (cur < mr.end()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
642 obj = oop(cur);
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
643 if (obj->klass_or_null() == NULL) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
644 // Ran into an unparseable point.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
645 return cur;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
646 } else if (!g1h->is_obj_dead(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
647 cl->do_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
648 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
649 if (cl->abort()) return cur;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
650 // The check above must occur before the operation below, since an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
651 // abort might invalidate the "size" operation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
652 cur += obj->size();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
653 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
654 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
655 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
656
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
657 HeapWord*
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
658 HeapRegion::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
659 oops_on_card_seq_iterate_careful(MemRegion mr,
1666
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
660 FilterOutOfRegionClosure* cl,
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
661 bool filter_young) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
662 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
663
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
664 // If we're within a stop-world GC, then we might look at a card in a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
665 // GC alloc region that extends onto a GC LAB, which may not be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
666 // parseable. Stop such at the "saved_mark" of the region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
667 if (G1CollectedHeap::heap()->is_gc_active()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
668 mr = mr.intersection(used_region_at_save_marks());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
669 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
670 mr = mr.intersection(used_region());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
671 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
672 if (mr.is_empty()) return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
673 // Otherwise, find the obj that extends onto mr.start().
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
674
1666
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
675 // The intersection of the incoming mr (for the card) and the
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
676 // allocated part of the region is non-empty. This implies that
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
677 // we have actually allocated into this region. The code in
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
678 // G1CollectedHeap.cpp that allocates a new region sets the
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
679 // is_young tag on the region before allocating. Thus we
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
680 // safely know if this region is young.
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
681 if (is_young() && filter_young) {
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
682 return NULL;
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
683 }
5cbac8938c4c 6956639: G1: assert(cached_ptr != card_ptr) failed: shouldn't be, concurrentG1Refine.cpp:307
johnc
parents: 1552
diff changeset
684
1705
2d160770d2e5 6814437: G1: remove the _new_refs array
johnc
parents: 1666
diff changeset
685 assert(!is_young(), "check value of filter_young");
2d160770d2e5 6814437: G1: remove the _new_refs array
johnc
parents: 1666
diff changeset
686
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
687 // We used to use "block_start_careful" here. But we're actually happy
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
688 // to update the BOT while we do this...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
689 HeapWord* cur = block_start(mr.start());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
690 assert(cur <= mr.start(), "Postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
691
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
692 while (cur <= mr.start()) {
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
693 if (oop(cur)->klass_or_null() == NULL) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
694 // Ran into an unparseable point.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
695 return cur;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
696 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
697 // Otherwise...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
698 int sz = oop(cur)->size();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
699 if (cur + sz > mr.start()) break;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
700 // Otherwise, go on.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
701 cur = cur + sz;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
702 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
703 oop obj;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
704 obj = oop(cur);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
705 // If we finish this loop...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
706 assert(cur <= mr.start()
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
707 && obj->klass_or_null() != NULL
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
708 && cur + obj->size() > mr.start(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
709 "Loop postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
710 if (!g1h->is_obj_dead(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
711 obj->oop_iterate(cl, mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
712 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
713
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
714 HeapWord* next;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
715 while (cur < mr.end()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
716 obj = oop(cur);
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
717 if (obj->klass_or_null() == NULL) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
718 // Ran into an unparseable point.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
719 return cur;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
720 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
721 // Otherwise:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
722 next = (cur + obj->size());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
723 if (!g1h->is_obj_dead(obj)) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
724 if (next < mr.end()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
725 obj->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
726 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
727 // this obj spans the boundary. If it's an array, stop at the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
728 // boundary.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
729 if (obj->is_objArray()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
730 obj->oop_iterate(cl, mr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
731 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
732 obj->oop_iterate(cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
733 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
734 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
735 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
736 cur = next;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
737 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
738 return NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
739 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
740
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
741 void HeapRegion::print() const { print_on(gclog_or_tty); }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
742 void HeapRegion::print_on(outputStream* st) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
743 if (isHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
744 if (startsHumongous())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
745 st->print(" HS");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
746 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
747 st->print(" HC");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
748 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
749 st->print(" ");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
750 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
751 if (in_collection_set())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
752 st->print(" CS");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
753 else if (is_gc_alloc_region())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
754 st->print(" A ");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
755 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
756 st->print(" ");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
757 if (is_young())
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1388
diff changeset
758 st->print(is_survivor() ? " SU" : " Y ");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
759 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
760 st->print(" ");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
761 if (is_empty())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
762 st->print(" F");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
763 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
764 st->print(" ");
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
765 st->print(" %5d", _gc_time_stamp);
1388
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1020
diff changeset
766 st->print(" PTAMS "PTR_FORMAT" NTAMS "PTR_FORMAT,
7666957bc44d 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 1020
diff changeset
767 prev_top_at_mark_start(), next_top_at_mark_start());
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
768 G1OffsetTableContigSpace::print_on(st);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
769 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
770
811
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 796
diff changeset
771 void HeapRegion::verify(bool allow_dirty) const {
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
772 bool dummy = false;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
773 verify(allow_dirty, /* use_prev_marking */ true, /* failures */ &dummy);
811
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 796
diff changeset
774 }
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 796
diff changeset
775
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
776 #define OBJ_SAMPLE_INTERVAL 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
777 #define BLOCK_SAMPLE_INTERVAL 100
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
778
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
779 // This really ought to be commoned up into OffsetTableContigSpace somehow.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
780 // We would need a mechanism to make that code skip dead objects.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
781
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
782 void HeapRegion::verify(bool allow_dirty,
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
783 bool use_prev_marking,
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
784 bool* failures) const {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
785 G1CollectedHeap* g1 = G1CollectedHeap::heap();
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
786 *failures = false;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
787 HeapWord* p = bottom();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
788 HeapWord* prev_p = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
789 int objs = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
790 int blocks = 0;
811
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 796
diff changeset
791 VerifyLiveClosure vl_cl(g1, use_prev_marking);
1718
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
792 bool is_humongous = isHumongous();
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
793 size_t object_num = 0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
794 while (p < top()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
795 size_t size = oop(p)->size();
1718
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
796 if (is_humongous != g1->isHumongous(size)) {
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
797 gclog_or_tty->print_cr("obj "PTR_FORMAT" is of %shumongous size ("
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
798 SIZE_FORMAT" words) in a %shumongous region",
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
799 p, g1->isHumongous(size) ? "" : "non-",
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
800 size, is_humongous ? "" : "non-");
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
801 *failures = true;
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
802 }
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
803 object_num += 1;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
804 if (blocks == BLOCK_SAMPLE_INTERVAL) {
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
805 HeapWord* res = block_start_const(p + (size/2));
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
806 if (p != res) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
807 gclog_or_tty->print_cr("offset computation 1 for "PTR_FORMAT" and "
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
808 SIZE_FORMAT" returned "PTR_FORMAT,
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
809 p, size, res);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
810 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
811 return;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
812 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
813 blocks = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
814 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
815 blocks++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
816 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
817 if (objs == OBJ_SAMPLE_INTERVAL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
818 oop obj = oop(p);
811
830ca2573896 6850846: G1: extend G1 marking verification
tonyp
parents: 796
diff changeset
819 if (!g1->is_obj_dead_cond(obj, this, use_prev_marking)) {
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
820 if (obj->is_oop()) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
821 klassOop klass = obj->klass();
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
822 if (!klass->is_perm()) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
823 gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" "
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
824 "not in perm", klass, obj);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
825 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
826 return;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
827 } else if (!klass->is_klass()) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
828 gclog_or_tty->print_cr("klass "PTR_FORMAT" of object "PTR_FORMAT" "
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
829 "not a klass", klass, obj);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
830 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
831 return;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
832 } else {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
833 vl_cl.set_containing_obj(obj);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
834 obj->oop_iterate(&vl_cl);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
835 if (vl_cl.failures()) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
836 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
837 }
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
838 if (G1MaxVerifyFailures >= 0 &&
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
839 vl_cl.n_failures() >= G1MaxVerifyFailures) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
840 return;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
841 }
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
842 }
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
843 } else {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
844 gclog_or_tty->print_cr(PTR_FORMAT" no an oop", obj);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
845 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
846 return;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
847 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
848 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
849 objs = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
850 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
851 objs++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
852 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
853 prev_p = p;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
854 p += size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
855 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
856 HeapWord* rend = end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
857 HeapWord* rtop = top();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
858 if (rtop < rend) {
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
859 HeapWord* res = block_start_const(rtop + (rend - rtop) / 2);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
860 if (res != rtop) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
861 gclog_or_tty->print_cr("offset computation 2 for "PTR_FORMAT" and "
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
862 PTR_FORMAT" returned "PTR_FORMAT,
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
863 rtop, rend, res);
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
864 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
865 return;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
866 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
867 }
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
868
1718
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
869 if (is_humongous && object_num > 1) {
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
870 gclog_or_tty->print_cr("region ["PTR_FORMAT","PTR_FORMAT"] is humongous "
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
871 "but has "SIZE_FORMAT", objects",
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
872 bottom(), end(), object_num);
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
873 *failures = true;
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
874 }
bb847e31b836 6974928: G1: sometimes humongous objects are allocated in young regions
tonyp
parents: 1705
diff changeset
875
1020
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
876 if (p != top()) {
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
877 gclog_or_tty->print_cr("end of last object "PTR_FORMAT" "
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
878 "does not match top "PTR_FORMAT, p, top());
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
879 *failures = true;
ff2402f6a50b 6882730: G1: parallel heap verification messes up region dump
tonyp
parents: 942
diff changeset
880 return;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
881 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
882 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
883
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
884 // G1OffsetTableContigSpace code; copied from space.cpp. Hope this can go
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
885 // away eventually.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
886
356
tonyp
parents: 355
diff changeset
887 void G1OffsetTableContigSpace::initialize(MemRegion mr, bool clear_space, bool mangle_space) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
888 // false ==> we'll do the clearing if there's clearing to be done.
356
tonyp
parents: 355
diff changeset
889 ContiguousSpace::initialize(mr, false, mangle_space);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
890 _offsets.zero_bottom_entry();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
891 _offsets.initialize_threshold();
356
tonyp
parents: 355
diff changeset
892 if (clear_space) clear(mangle_space);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
893 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
894
356
tonyp
parents: 355
diff changeset
895 void G1OffsetTableContigSpace::clear(bool mangle_space) {
tonyp
parents: 355
diff changeset
896 ContiguousSpace::clear(mangle_space);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
897 _offsets.zero_bottom_entry();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
898 _offsets.initialize_threshold();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
899 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
900
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
901 void G1OffsetTableContigSpace::set_bottom(HeapWord* new_bottom) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
902 Space::set_bottom(new_bottom);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
903 _offsets.set_bottom(new_bottom);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
904 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
905
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
906 void G1OffsetTableContigSpace::set_end(HeapWord* new_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
907 Space::set_end(new_end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
908 _offsets.resize(new_end - bottom());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
909 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
910
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
911 void G1OffsetTableContigSpace::print() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
912 print_short();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
913 gclog_or_tty->print_cr(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
914 INTPTR_FORMAT ", " INTPTR_FORMAT ")",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
915 bottom(), top(), _offsets.threshold(), end());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
916 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
917
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
918 HeapWord* G1OffsetTableContigSpace::initialize_threshold() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
919 return _offsets.initialize_threshold();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
920 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
921
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
922 HeapWord* G1OffsetTableContigSpace::cross_threshold(HeapWord* start,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
923 HeapWord* end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
924 _offsets.alloc_block(start, end);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
925 return _offsets.threshold();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
926 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
927
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
928 HeapWord* G1OffsetTableContigSpace::saved_mark_word() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
929 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
930 assert( _gc_time_stamp <= g1h->get_gc_time_stamp(), "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
931 if (_gc_time_stamp < g1h->get_gc_time_stamp())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
932 return top();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
933 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
934 return ContiguousSpace::saved_mark_word();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
935 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
936
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
937 void G1OffsetTableContigSpace::set_saved_mark() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
938 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
939 unsigned curr_gc_time_stamp = g1h->get_gc_time_stamp();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
940
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
941 if (_gc_time_stamp < curr_gc_time_stamp) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
942 // The order of these is important, as another thread might be
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
943 // about to start scanning this region. If it does so after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
944 // set_saved_mark and before _gc_time_stamp = ..., then the latter
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
945 // will be false, and it will pick up top() as the high water mark
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
946 // of region. If it does so after _gc_time_stamp = ..., then it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
947 // will pick up the right saved_mark_word() as the high water mark
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
948 // of the region. Either way, the behaviour will be correct.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
949 ContiguousSpace::set_saved_mark();
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
950 OrderAccess::storestore();
353
9bb2c10ac07b 6723570: G1: assertion failure: p == current_top or oop(p)->is_oop(),"p is not a block start" (revisited!)
iveresov
parents: 342
diff changeset
951 _gc_time_stamp = curr_gc_time_stamp;
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
952 // The following fence is to force a flush of the writes above, but
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
953 // is strictly not needed because when an allocating worker thread
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
954 // calls set_saved_mark() it does so under the ParGCRareEvent_lock;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
955 // when the lock is released, the write will be flushed.
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 838
diff changeset
956 // OrderAccess::fence();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
957 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
958 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
959
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
960 G1OffsetTableContigSpace::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
961 G1OffsetTableContigSpace(G1BlockOffsetSharedArray* sharedOffsetArray,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
962 MemRegion mr, bool is_zeroed) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
963 _offsets(sharedOffsetArray, mr),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
964 _par_alloc_lock(Mutex::leaf, "OffsetTableContigSpace par alloc lock", true),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
965 _gc_time_stamp(0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
966 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
967 _offsets.set_space(this);
356
tonyp
parents: 355
diff changeset
968 initialize(mr, !is_zeroed, SpaceDecorator::Mangle);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
969 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
970
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
971 size_t RegionList::length() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
972 size_t len = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
973 HeapRegion* cur = hd();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
974 DEBUG_ONLY(HeapRegion* last = NULL);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
975 while (cur != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
976 len++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
977 DEBUG_ONLY(last = cur);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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978 cur = get_next(cur);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
979 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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980 assert(last == tl(), "Invariant");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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981 return len;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
982 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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983
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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984 void RegionList::insert_before_head(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
985 assert(well_formed(), "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
986 set_next(r, hd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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987 _hd = r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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988 _sz++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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989 if (tl() == NULL) _tl = r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
990 assert(well_formed(), "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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991 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
992
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
993 void RegionList::prepend_list(RegionList* new_list) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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994 assert(well_formed(), "Precondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
995 assert(new_list->well_formed(), "Precondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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996 HeapRegion* new_tl = new_list->tl();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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997 if (new_tl != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
998 set_next(new_tl, hd());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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999 _hd = new_list->hd();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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1000 _sz += new_list->sz();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1001 if (tl() == NULL) _tl = new_list->tl();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1002 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1003 assert(new_list->hd() == NULL && new_list->sz() == 0, "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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1004 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1005 assert(well_formed(), "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1006 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1007
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1008 void RegionList::delete_after(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1009 assert(well_formed(), "Precondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
1010 HeapRegion* next = get_next(r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1011 assert(r != NULL, "Precondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1012 HeapRegion* next_tl = get_next(next);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1013 set_next(r, next_tl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1014 dec_sz();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1015 if (next == tl()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1016 assert(next_tl == NULL, "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1017 _tl = r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1018 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1019 assert(well_formed(), "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1020 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1021
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1022 HeapRegion* RegionList::pop() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1023 assert(well_formed(), "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1024 HeapRegion* res = hd();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1025 if (res != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1026 _hd = get_next(res);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1027 _sz--;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1028 set_next(res, NULL);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1029 if (sz() == 0) _tl = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1030 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1031 assert(well_formed(), "Inv");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1032 return res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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1033 }