1 /* 2 * Copyright (c) 1997, 2015, 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/shared/barrierSet.inline.hpp" 27 #include "gc/shared/collectedHeap.hpp" 28 #include "memory/universe.hpp" 29 30 // count is number of array elements being written 31 void BarrierSet::static_write_ref_array_pre(HeapWord* start, size_t count) { 32 assert(count <= (size_t)max_intx, "count too large"); 33 if (UseCompressedOops) { 34 GC::gc()->heap()->barrier_set()->write_ref_array_pre((narrowOop*)start, (int)count, false); 35 } else { 36 GC::gc()->heap()->barrier_set()->write_ref_array_pre( (oop*)start, (int)count, false); 37 } 38 } 39 40 // count is number of array elements being written 41 void BarrierSet::static_write_ref_array_post(HeapWord* start, size_t count) { 42 // simply delegate to instance method 43 GC::gc()->heap()->barrier_set()->write_ref_array(start, count); 44 } 45 46 void BarrierSet::oop_store(oop* p, oop v) { 47 write_ref_field_pre(p, v); 48 oopDesc::encode_store_heap_oop(p, v); 49 write_ref_field(p, v, false /* release */); 50 } 51 52 void BarrierSet::oop_store(narrowOop* p, oop v) { 53 write_ref_field_pre(p, v); 54 oopDesc::encode_store_heap_oop(p, v); 55 write_ref_field(p, v, false /* release */); 56 } 57 58 void BarrierSet::oop_store(volatile oop* p, oop v) { 59 write_ref_field_pre((oop*) p, v); // cast away volatile 60 oopDesc::release_encode_store_heap_oop(p, v); 61 write_ref_field((void*) p, v, true); // cast away type 62 } 63 64 void BarrierSet::oop_store(volatile narrowOop* p, oop v) { 65 write_ref_field_pre((narrowOop*) p, v); // cast away volatile 66 oopDesc::release_encode_store_heap_oop(p, v); 67 write_ref_field((void*) p, v, true /* release */); // cast away type 68 } 69 70 void BarrierSet::klass_oop_store(oop* p, oop v) { 71 oopDesc::encode_store_heap_oop(p, v); 72 } 73 74 void BarrierSet::klass_oop_store(volatile oop* p, oop v) { 75 oopDesc::release_encode_store_heap_oop(p, v); 76 }