1 /* 2 * Copyright (c) 2017, 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 25 #include "precompiled.hpp" 26 #include "gc/g1/g1FullGCMarker.inline.hpp" 27 #include "gc/shared/referenceProcessor.hpp" 28 #include "memory/iterator.inline.hpp" 29 30 G1FullGCMarker::G1FullGCMarker(uint worker_id, PreservedMarks* preserved_stack, G1CMBitMap* bitmap) : 31 _worker_id(worker_id), 32 _mark_closure(worker_id, this, G1CollectedHeap::heap()->ref_processor_stw()), 33 _verify_closure(VerifyOption_G1UseFullMarking), 34 _cld_closure(mark_closure()), 35 _stack_closure(this), 36 _preserved_stack(preserved_stack), 37 _bitmap(bitmap) { 38 _oop_stack.initialize(); 39 _objarray_stack.initialize(); 40 } 41 42 G1FullGCMarker::~G1FullGCMarker() { 43 assert(is_empty(), "Must be empty at this point"); 44 } 45 46 void G1FullGCMarker::complete_marking(OopQueueSet* oop_stacks, 47 ObjArrayTaskQueueSet* array_stacks, 48 ParallelTaskTerminator* terminator) { 49 int hash_seed = 17; 50 do { 51 drain_stack(); 52 ObjArrayTask steal_array; 53 if (array_stacks->steal(_worker_id, &hash_seed, steal_array)) { 54 follow_array_chunk(objArrayOop(steal_array.obj()), steal_array.index()); 55 } else { 56 oop steal_oop; 57 if (oop_stacks->steal(_worker_id, &hash_seed, steal_oop)) { 58 follow_object(steal_oop); 59 } 60 } 61 } while (!is_empty() || !terminator->offer_termination()); 62 }