71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018, 2019, Red Hat, Inc. 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/shenandoah/shenandoahHeap.inline.hpp"
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#include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp"
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#include "gc/shenandoah/shenandoahThreadLocalData.hpp"
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ShenandoahSATBMarkQueueSet::ShenandoahSATBMarkQueueSet(BufferNode::Allocator* allocator) :
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SATBMarkQueueSet(allocator)
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{}
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SATBMarkQueue& ShenandoahSATBMarkQueueSet::satb_queue_for_thread(Thread* const t) const {
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return ShenandoahThreadLocalData::satb_mark_queue(t);
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}
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class ShenandoahSATBMarkQueueFilterFn {
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ShenandoahHeap* const _heap;
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public:
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ShenandoahSATBMarkQueueFilterFn(ShenandoahHeap* heap) : _heap(heap) {}
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// Return true if entry should be filtered out (removed), false if
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// it should be retained.
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bool operator()(const void* entry) const {
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return !_heap->requires_marking(entry);
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}
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};
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void ShenandoahSATBMarkQueueSet::filter(SATBMarkQueue* queue) {
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ShenandoahHeap* heap = ShenandoahHeap::heap();
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apply_filter(ShenandoahSATBMarkQueueFilterFn(heap), queue);
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}
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void ShenandoahSATBMarkQueue::handle_completed_buffer() {
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SATBMarkQueue::handle_completed_buffer();
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if (!is_empty()) {
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Thread* t = Thread::current();
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if (ShenandoahThreadLocalData::is_force_satb_flush(t)) {
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// Non-empty buffer is compacted, and we decided not to enqueue it.
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// We still want to know about leftover work in that buffer eventually.
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// This avoid dealing with these leftovers during the final-mark, after
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// the buffers are drained completely. See JDK-8205353 for more discussion.
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ShenandoahThreadLocalData::set_force_satb_flush(t, false);
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enqueue_completed_buffer();
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}
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}
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}
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