1 /* 2 * Copyright (c) 2015, 2018, 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 #include "gc/z/zHeap.inline.hpp" 26 #include "gc/z/zOopClosures.inline.hpp" 27 #include "gc/z/zStat.hpp" 28 #include "gc/z/zTask.hpp" 29 #include "gc/z/zThread.hpp" 30 #include "runtime/jniHandles.hpp" 31 32 ZWeakRootsProcessor::ZWeakRootsProcessor(ZWorkers* workers) : 33 _workers(workers) {} 34 35 class ZProcessWeakRootsTask : public ZTask { 36 private: 37 ZWeakRootsIterator _weak_roots; 38 39 public: 40 ZProcessWeakRootsTask() : 41 ZTask("ZProcessWeakRootsTask"), 42 _weak_roots() {} 43 44 virtual void work() { 45 ZPhantomIsAliveObjectClosure is_alive; 46 ZPhantomKeepAliveOopClosure keep_alive; 47 _weak_roots.weak_oops_do(&is_alive, &keep_alive); 48 } 49 }; 50 51 void ZWeakRootsProcessor::process_weak_roots() { 52 ZProcessWeakRootsTask task; 53 _workers->run_parallel(&task); 54 } 55 56 class ZProcessConcurrentWeakRootsTask : public ZTask { 57 private: 58 ZConcurrentWeakRootsIterator _concurrent_weak_roots; 59 60 public: 61 ZProcessConcurrentWeakRootsTask() : 62 ZTask("ZProcessConccurentWeakRootsTask"), 63 _concurrent_weak_roots() {} 64 65 virtual void work() { 66 ZPhantomCleanOopClosure cl; 67 _concurrent_weak_roots.oops_do(&cl); 68 } 69 }; 70 71 void ZWeakRootsProcessor::process_concurrent_weak_roots() { 72 ZProcessConcurrentWeakRootsTask task; 73 _workers->run_concurrent(&task); 74 }