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50 lines
2 KiB
C++
50 lines
2 KiB
C++
/*
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* Copyright (c) 2021, 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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#ifndef SHARE_GC_PARALLEL_PSSTRINGDEDUP_HPP
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#define SHARE_GC_PARALLEL_PSSTRINGDEDUP_HPP
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#include "gc/parallel/psScavenge.hpp"
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#include "gc/shared/stringdedup/stringDedup.hpp"
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#include "memory/allStatic.hpp"
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#include "oops/oopsHierarchy.hpp"
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class psStringDedup : AllStatic {
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public:
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static bool is_candidate_from_mark(oop java_string) {
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// Candidate if string is being evacuated from young to old but has not
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// reached the deduplication age threshold, i.e. has not previously been a
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// candidate during its life in the young generation.
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return PSScavenge::is_obj_in_young(java_string) &&
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StringDedup::is_below_threshold_age(java_string->age());
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}
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static bool is_candidate_from_evacuation(oop obj,
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bool obj_is_tenured) {
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return obj_is_tenured ?
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StringDedup::is_below_threshold_age(obj->age()) :
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StringDedup::is_threshold_age(obj->age());
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}
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};
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#endif // SHARE_GC_PARALLEL_PSSTRINGDEDUP_HPP
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