| /* |
| * Copyright (c) 2021, Alibaba Group Holding Limited. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/serial/defNewGeneration.hpp" |
| #include "gc/serial/serialHeap.hpp" |
| #include "gc/serial/serialStringDedup.hpp" |
| #include "oops/oop.inline.hpp" |
| |
| bool SerialStringDedup::is_candidate_from_mark(oop java_string) { |
| // Candidate if string is being evacuated from young to old but has not |
| // reached the deduplication age threshold, i.e. has not previously been a |
| // candidate during its life in the young generation. |
| return SerialHeap::heap()->young_gen()->is_in_reserved(java_string) && |
| StringDedup::is_below_threshold_age(java_string->age()); |
| } |
