1 /* 2 * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 #include "precompiled.hpp" 25 26 #include "gc/shared/stringdedup/stringDedup.hpp" 27 #include "gc/shared/stringdedup/stringDedupQueue.hpp" 28 #include "gc/shared/stringdedup/stringDedupTable.hpp" 29 #include "gc/shared/stringdedup/stringDedupThread.hpp" 30 31 bool StringDedup::_enabled = false; 32 33 void StringDedup::gc_prologue(bool resize_and_rehash_table) { 34 assert(is_enabled(), "String deduplication not enabled"); 35 StringDedupQueue::gc_prologue(); 36 StringDedupTable::gc_prologue(resize_and_rehash_table); 37 38 } 39 void StringDedup::gc_epilogue() { 40 assert(is_enabled(), "String deduplication not enabled"); 41 StringDedupQueue::gc_epilogue(); 42 StringDedupTable::gc_epilogue(); 43 } 44 45 void StringDedup::stop() { 46 assert(is_enabled(), "String deduplication not enabled"); 47 StringDedupThread::thread()->stop(); 48 } 49 50 void StringDedup::deduplicate(oop java_string) { 51 assert(is_enabled(), "String deduplication not enabled"); 52 StringDedupStat dummy; // Statistics from this path is never used 53 StringDedupTable::deduplicate(java_string, &dummy); 54 } 55 56 void StringDedup::parallel_unlink(StringDedupUnlinkOrOopsDoClosure* unlink, uint worker_id) { 57 assert(is_enabled(), "String deduplication not enabled"); 58 StringDedupQueue::unlink_or_oops_do(unlink); 59 StringDedupTable::unlink_or_oops_do(unlink, worker_id); 60 } 61 62 void StringDedup::threads_do(ThreadClosure* tc) { 63 assert(is_enabled(), "String deduplication not enabled"); 64 tc->do_thread(StringDedupThread::thread()); 65 } 66 67 void StringDedup::print_worker_threads_on(outputStream* st) { 68 assert(is_enabled(), "String deduplication not enabled"); 69 StringDedupThread::thread()->print_on(st); 70 st->cr(); 71 } 72 73 void StringDedup::verify() { 74 assert(is_enabled(), "String deduplication not enabled"); 75 StringDedupQueue::verify(); 76 StringDedupTable::verify(); 77 } 78 79 80 StringDedupUnlinkOrOopsDoClosure::StringDedupUnlinkOrOopsDoClosure(BoolObjectClosure* is_alive, 81 OopClosure* keep_alive) : 82 _always_true(), 83 _do_nothing(), 84 _is_alive(is_alive != NULL ? is_alive : &_always_true), 85 _keep_alive(keep_alive != NULL ? keep_alive : &_do_nothing) { 86 }