author | kbarrett |
Tue, 12 Jun 2018 18:12:59 -0400 | |
changeset 50532 | a18c60527166 |
parent 50113 | caf115bb98ad |
child 50752 | 9d62da00bf15 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "gc/g1/g1CollectedHeap.hpp" |
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#include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp" |
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#include "gc/g1/g1FullCollector.hpp" |
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#include "gc/g1/g1FullGCAdjustTask.hpp" |
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#include "gc/g1/g1FullGCCompactionPoint.hpp" |
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#include "gc/g1/g1FullGCMarker.hpp" |
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#include "gc/g1/g1FullGCOopClosures.inline.hpp" |
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#include "gc/g1/heapRegion.inline.hpp" |
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#include "gc/shared/gcTraceTime.inline.hpp" |
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#include "gc/shared/referenceProcessor.hpp" |
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#include "logging/log.hpp" |
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class G1AdjustLiveClosure : public StackObj { |
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G1AdjustClosure* _adjust_closure; |
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public: |
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G1AdjustLiveClosure(G1AdjustClosure* cl) : |
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_adjust_closure(cl) { } |
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size_t apply(oop object) { |
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return object->oop_iterate_size(_adjust_closure); |
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} |
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}; |
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class G1AdjustRegionClosure : public HeapRegionClosure { |
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G1CMBitMap* _bitmap; |
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uint _worker_id; |
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public: |
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G1AdjustRegionClosure(G1CMBitMap* bitmap, uint worker_id) : |
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_bitmap(bitmap), |
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_worker_id(worker_id) { } |
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bool do_heap_region(HeapRegion* r) { |
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G1AdjustClosure cl; |
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if (r->is_humongous()) { |
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oop obj = oop(r->humongous_start_region()->bottom()); |
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obj->oop_iterate(&cl, MemRegion(r->bottom(), r->top())); |
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} else if (r->is_open_archive()) { |
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// Only adjust the open archive regions, the closed ones |
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// never change. |
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G1AdjustLiveClosure adjust(&cl); |
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r->apply_to_marked_objects(_bitmap, &adjust); |
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// Open archive regions will not be compacted and the marking information is |
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// no longer needed. Clear it here to avoid having to do it later. |
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_bitmap->clear_region(r); |
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} else { |
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G1AdjustLiveClosure adjust(&cl); |
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r->apply_to_marked_objects(_bitmap, &adjust); |
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} |
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return false; |
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} |
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}; |
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G1FullGCAdjustTask::G1FullGCAdjustTask(G1FullCollector* collector) : |
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G1FullGCTask("G1 Adjust", collector), |
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_root_processor(G1CollectedHeap::heap(), collector->workers()), |
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_hrclaimer(collector->workers()), |
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_adjust(), |
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_adjust_string_dedup(NULL, &_adjust, G1StringDedup::is_enabled()) { |
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// Need cleared claim bits for the roots processing |
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ClassLoaderDataGraph::clear_claimed_marks(); |
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} |
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void G1FullGCAdjustTask::work(uint worker_id) { |
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Ticks start = Ticks::now(); |
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ResourceMark rm; |
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// Adjust preserved marks first since they are not balanced. |
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G1FullGCMarker* marker = collector()->marker(worker_id); |
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marker->preserved_stack()->adjust_during_full_gc(); |
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// Adjust the weak_roots. |
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CLDToOopClosure adjust_cld(&_adjust); |
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CodeBlobToOopClosure adjust_code(&_adjust, CodeBlobToOopClosure::FixRelocations); |
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_root_processor.process_full_gc_weak_roots(&_adjust); |
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// Needs to be last, process_all_roots calls all_tasks_completed(...). |
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_root_processor.process_all_roots( |
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&_adjust, |
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&adjust_cld, |
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&adjust_code); |
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// Adjust string dedup if enabled. |
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if (G1StringDedup::is_enabled()) { |
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G1StringDedup::parallel_unlink(&_adjust_string_dedup, worker_id); |
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} |
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// Now adjust pointers region by region |
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G1AdjustRegionClosure blk(collector()->mark_bitmap(), worker_id); |
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G1CollectedHeap::heap()->heap_region_par_iterate_from_worker_offset(&blk, &_hrclaimer, worker_id); |
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log_task("Adjust task", worker_id, start); |
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} |