Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp @ 20263:4dfab3faf5e7
8037958: ConcurrentMark::cleanup leaks BitMaps if VerifyDuringGC is enabled
Summary: Allocate temporary BitMaps in the VMThread's resource area
Reviewed-by: stefank, sjohanss
author | mgerdin |
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date | Wed, 26 Mar 2014 10:54:52 +0100 |
parents | b0c374311c4e |
children | a3953c777565 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP | |
27 | |
28 #include "gc_implementation/g1/concurrentMark.hpp" | |
29 #include "gc_implementation/g1/g1CollectedHeap.hpp" | |
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30 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1973 | 31 #include "gc_implementation/g1/g1CollectorPolicy.hpp" |
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32 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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33 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
2149 | 34 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" |
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35 #include "runtime/orderAccess.inline.hpp" |
1972 | 36 #include "utilities/taskqueue.hpp" |
37 | |
342 | 38 // Inline functions for G1CollectedHeap |
39 | |
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40 // Return the region with the given index. It assumes the index is valid. |
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41 inline HeapRegion* G1CollectedHeap::region_at(uint index) const { return _hrs.at(index); } |
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42 |
3766 | 43 template <class T> |
342 | 44 inline HeapRegion* |
3766 | 45 G1CollectedHeap::heap_region_containing(const T addr) const { |
46 HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr); | |
342 | 47 // hr can be null if addr in perm_gen |
48 if (hr != NULL && hr->continuesHumongous()) { | |
49 hr = hr->humongous_start_region(); | |
50 } | |
51 return hr; | |
52 } | |
53 | |
3766 | 54 template <class T> |
342 | 55 inline HeapRegion* |
3766 | 56 G1CollectedHeap::heap_region_containing_raw(const T addr) const { |
57 assert(_g1_reserved.contains((const void*) addr), "invariant"); | |
58 HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr); | |
342 | 59 return res; |
60 } | |
61 | |
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62 inline void G1CollectedHeap::reset_gc_time_stamp() { |
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63 _gc_time_stamp = 0; |
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64 OrderAccess::fence(); |
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65 // Clear the cached CSet starting regions and time stamps. |
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66 // Their validity is dependent on the GC timestamp. |
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67 clear_cset_start_regions(); |
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68 } |
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69 |
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70 inline void G1CollectedHeap::increment_gc_time_stamp() { |
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71 ++_gc_time_stamp; |
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72 OrderAccess::fence(); |
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73 } |
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74 |
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75 inline void G1CollectedHeap::old_set_remove(HeapRegion* hr) { |
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76 _old_set.remove(hr); |
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77 } |
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78 |
342 | 79 inline bool G1CollectedHeap::obj_in_cs(oop obj) { |
3766 | 80 HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj); |
342 | 81 return r != NULL && r->in_collection_set(); |
82 } | |
83 | |
1973 | 84 inline HeapWord* |
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85 G1CollectedHeap::attempt_allocation(size_t word_size, |
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86 unsigned int* gc_count_before_ret, |
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87 int* gclocker_retry_count_ret) { |
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88 assert_heap_not_locked_and_not_at_safepoint(); |
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89 assert(!isHumongous(word_size), "attempt_allocation() should not " |
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90 "be called for humongous allocation requests"); |
1973 | 91 |
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92 HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size, |
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93 false /* bot_updates */); |
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94 if (result == NULL) { |
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95 result = attempt_allocation_slow(word_size, |
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96 gc_count_before_ret, |
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97 gclocker_retry_count_ret); |
342 | 98 } |
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99 assert_heap_not_locked(); |
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100 if (result != NULL) { |
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101 dirty_young_block(result, word_size); |
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102 } |
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103 return result; |
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104 } |
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105 |
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106 inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t |
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107 word_size) { |
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108 assert(!isHumongous(word_size), |
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109 "we should not be seeing humongous-size allocations in this path"); |
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110 |
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111 HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size, |
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112 false /* bot_updates */); |
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113 if (result == NULL) { |
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114 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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115 result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size, |
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116 false /* bot_updates */); |
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117 } |
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118 if (result != NULL) { |
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119 dirty_young_block(result, word_size); |
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120 } |
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121 return result; |
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122 } |
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123 |
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124 inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) { |
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125 assert(!isHumongous(word_size), |
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126 "we should not be seeing humongous-size allocations in this path"); |
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127 |
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128 HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size, |
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129 true /* bot_updates */); |
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130 if (result == NULL) { |
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131 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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132 result = _old_gc_alloc_region.attempt_allocation_locked(word_size, |
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133 true /* bot_updates */); |
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134 } |
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135 return result; |
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136 } |
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137 |
1973 | 138 // It dirties the cards that cover the block so that so that the post |
139 // write barrier never queues anything when updating objects on this | |
140 // block. It is assumed (and in fact we assert) that the block | |
141 // belongs to a young region. | |
142 inline void | |
143 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) { | |
144 assert_heap_not_locked(); | |
145 | |
146 // Assign the containing region to containing_hr so that we don't | |
147 // have to keep calling heap_region_containing_raw() in the | |
148 // asserts below. | |
149 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);) | |
150 assert(containing_hr != NULL && start != NULL && word_size > 0, | |
151 "pre-condition"); | |
152 assert(containing_hr->is_in(start), "it should contain start"); | |
153 assert(containing_hr->is_young(), "it should be young"); | |
154 assert(!containing_hr->isHumongous(), "it should not be humongous"); | |
155 | |
156 HeapWord* end = start + word_size; | |
157 assert(containing_hr->is_in(end - 1), "it should also contain end - 1"); | |
158 | |
159 MemRegion mr(start, end); | |
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160 g1_barrier_set()->g1_mark_as_young(mr); |
342 | 161 } |
162 | |
1709 | 163 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const { |
342 | 164 return _task_queues->queue(i); |
165 } | |
166 | |
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167 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const { |
342 | 168 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj); |
169 } | |
170 | |
171 inline bool G1CollectedHeap::isMarkedNext(oop obj) const { | |
172 return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj); | |
173 } | |
1972 | 174 |
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175 |
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176 // This is a fast test on whether a reference points into the |
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177 // collection set or not. Assume that the reference |
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178 // points into the heap. |
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179 inline bool G1CollectedHeap::in_cset_fast_test(oop obj) { |
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180 bool ret = _in_cset_fast_test.get_by_address((HeapWord*)obj); |
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181 // let's make sure the result is consistent with what the slower |
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182 // test returns |
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183 assert( ret || !obj_in_cs(obj), "sanity"); |
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184 assert(!ret || obj_in_cs(obj), "sanity"); |
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185 return ret; |
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186 } |
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187 |
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188 #ifndef PRODUCT |
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189 // Support for G1EvacuationFailureALot |
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190 |
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191 inline bool |
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192 G1CollectedHeap::evacuation_failure_alot_for_gc_type(bool gcs_are_young, |
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193 bool during_initial_mark, |
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194 bool during_marking) { |
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195 bool res = false; |
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196 if (during_marking) { |
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197 res |= G1EvacuationFailureALotDuringConcMark; |
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198 } |
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199 if (during_initial_mark) { |
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200 res |= G1EvacuationFailureALotDuringInitialMark; |
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201 } |
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202 if (gcs_are_young) { |
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203 res |= G1EvacuationFailureALotDuringYoungGC; |
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204 } else { |
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205 // GCs are mixed |
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206 res |= G1EvacuationFailureALotDuringMixedGC; |
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207 } |
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208 return res; |
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209 } |
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210 |
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211 inline void |
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212 G1CollectedHeap::set_evacuation_failure_alot_for_current_gc() { |
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213 if (G1EvacuationFailureALot) { |
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214 // Note we can't assert that _evacuation_failure_alot_for_current_gc |
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215 // is clear here. It may have been set during a previous GC but that GC |
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216 // did not copy enough objects (i.e. G1EvacuationFailureALotCount) to |
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217 // trigger an evacuation failure and clear the flags and and counts. |
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218 |
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219 // Check if we have gone over the interval. |
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220 const size_t gc_num = total_collections(); |
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221 const size_t elapsed_gcs = gc_num - _evacuation_failure_alot_gc_number; |
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222 |
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223 _evacuation_failure_alot_for_current_gc = (elapsed_gcs >= G1EvacuationFailureALotInterval); |
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224 |
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225 // Now check if G1EvacuationFailureALot is enabled for the current GC type. |
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226 const bool gcs_are_young = g1_policy()->gcs_are_young(); |
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227 const bool during_im = g1_policy()->during_initial_mark_pause(); |
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228 const bool during_marking = mark_in_progress(); |
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229 |
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230 _evacuation_failure_alot_for_current_gc &= |
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231 evacuation_failure_alot_for_gc_type(gcs_are_young, |
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232 during_im, |
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233 during_marking); |
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234 } |
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235 } |
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236 |
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237 inline bool |
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238 G1CollectedHeap::evacuation_should_fail() { |
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239 if (!G1EvacuationFailureALot || !_evacuation_failure_alot_for_current_gc) { |
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240 return false; |
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241 } |
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242 // G1EvacuationFailureALot is in effect for current GC |
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243 // Access to _evacuation_failure_alot_count is not atomic; |
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244 // the value does not have to be exact. |
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245 if (++_evacuation_failure_alot_count < G1EvacuationFailureALotCount) { |
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246 return false; |
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247 } |
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248 _evacuation_failure_alot_count = 0; |
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249 return true; |
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250 } |
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251 |
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252 inline void G1CollectedHeap::reset_evacuation_should_fail() { |
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253 if (G1EvacuationFailureALot) { |
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254 _evacuation_failure_alot_gc_number = total_collections(); |
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255 _evacuation_failure_alot_count = 0; |
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256 _evacuation_failure_alot_for_current_gc = false; |
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257 } |
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258 } |
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259 #endif // #ifndef PRODUCT |
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260 |
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261 inline bool G1CollectedHeap::is_in_young(const oop obj) { |
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262 HeapRegion* hr = heap_region_containing(obj); |
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263 return hr != NULL && hr->is_young(); |
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264 } |
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265 |
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266 // We don't need barriers for initializing stores to objects |
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267 // in the young gen: for the SATB pre-barrier, there is no |
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268 // pre-value that needs to be remembered; for the remembered-set |
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269 // update logging post-barrier, we don't maintain remembered set |
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270 // information for young gen objects. |
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271 inline bool G1CollectedHeap::can_elide_initializing_store_barrier(oop new_obj) { |
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272 return is_in_young(new_obj); |
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273 } |
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274 |
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275 inline bool G1CollectedHeap::is_obj_dead(const oop obj) const { |
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276 const HeapRegion* hr = heap_region_containing(obj); |
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277 if (hr == NULL) { |
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278 if (obj == NULL) return false; |
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279 else return true; |
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280 } |
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281 else return is_obj_dead(obj, hr); |
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282 } |
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283 |
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284 inline bool G1CollectedHeap::is_obj_ill(const oop obj) const { |
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285 const HeapRegion* hr = heap_region_containing(obj); |
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286 if (hr == NULL) { |
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287 if (obj == NULL) return false; |
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288 else return true; |
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289 } |
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290 else return is_obj_ill(obj, hr); |
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291 } |
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292 |
1972 | 293 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP |