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 #include "memory/iterator.hpp" 31 32 bool StringDedup::_enabled = false; 33 34 void StringDedup::gc_prologue(bool resize_and_rehash_table) { 35 assert(is_enabled(), "String deduplication not enabled"); 36 StringDedupQueue::gc_prologue(); 37 StringDedupTable::gc_prologue(resize_and_rehash_table); 38 39 } 40 void StringDedup::gc_epilogue() { 41 assert(is_enabled(), "String deduplication not enabled"); 42 StringDedupQueue::gc_epilogue(); 43 StringDedupTable::gc_epilogue(); 44 } 45 46 void StringDedup::stop() { 47 assert(is_enabled(), "String deduplication not enabled"); 48 StringDedupThread::thread()->stop(); 49 } 50 51 void StringDedup::deduplicate(oop java_string) { 52 assert(is_enabled(), "String deduplication not enabled"); 53 StringDedupStat dummy; // Statistics from this path is never used 54 StringDedupTable::deduplicate(java_string, &dummy); 55 } 56 57 void StringDedup::parallel_unlink(StringDedupUnlinkOrOopsDoClosure* unlink, uint worker_id) { 58 assert(is_enabled(), "String deduplication not enabled"); 59 StringDedupQueue::unlink_or_oops_do(unlink); 60 StringDedupTable::unlink_or_oops_do(unlink, worker_id); 61 } 62 63 void StringDedup::threads_do(ThreadClosure* tc) { 64 assert(is_enabled(), "String deduplication not enabled"); 65 tc->do_thread(StringDedupThread::thread()); 66 } 67 68 void StringDedup::print_worker_threads_on(outputStream* st) { 69 assert(is_enabled(), "String deduplication not enabled"); 70 StringDedupThread::thread()->print_on(st); 71 st->cr(); 72 } 73 74 void StringDedup::verify() { 75 assert(is_enabled(), "String deduplication not enabled"); 76 StringDedupQueue::verify(); 77 StringDedupTable::verify(); 78 } 79 80 81 StringDedupUnlinkOrOopsDoClosure::StringDedupUnlinkOrOopsDoClosure(BoolObjectClosure* is_alive, 82 OopClosure* keep_alive) : 83 _always_true(), 84 _do_nothing(), 85 _is_alive(is_alive != NULL ? is_alive : &_always_true), 86 _keep_alive(keep_alive != NULL ? keep_alive : &_do_nothing) { 87 }