1 /* 2 * Copyright (c) 2000, 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 #ifndef SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP 26 #define SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP 27 28 #include "gc/serial/markSweep.hpp" 29 #include "memory/metaspaceShared.hpp" 30 #include "memory/universe.hpp" 31 #include "oops/markOop.inline.hpp" 32 #include "oops/oop.inline.hpp" 33 #if INCLUDE_ALL_GCS 34 #include "gc/g1/g1Allocator.inline.hpp" 35 #endif // INCLUDE_ALL_GCS 36 37 inline bool MarkSweep::is_closed_archive_object(oop object) { 38 #if INCLUDE_ALL_GCS 39 return G1ArchiveAllocator::is_closed_archive_object(object); 40 #else 41 return false; 42 #endif 43 } 44 45 inline bool MarkSweep::is_open_archive_object(oop object) { 46 #if INCLUDE_ALL_GCS 47 return G1ArchiveAllocator::is_open_archive_object(object); 48 #else 49 return false; 50 #endif 51 } 52 53 inline bool MarkSweep::is_archive_object(oop object) { 54 #if INCLUDE_ALL_GCS 55 return G1ArchiveAllocator::is_archive_object(object); 56 #else 57 return false; 58 #endif 59 } 60 61 inline int MarkSweep::adjust_pointers(oop obj) { 62 return obj->oop_iterate_size(&MarkSweep::adjust_pointer_closure); 63 } 64 65 template <class T> inline void MarkSweep::adjust_pointer(T* p) { 66 T heap_oop = oopDesc::load_heap_oop(p); 67 if (!oopDesc::is_null(heap_oop)) { 68 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 69 assert(Universe::heap()->is_in(obj), "should be in heap"); 70 71 oop new_obj = oop(obj->mark()->decode_pointer()); 72 73 assert(is_archive_object(obj) || // no forwarding of archive objects 74 new_obj != NULL || // is forwarding ptr? 75 obj->mark() == markOopDesc::prototype() || // not gc marked? 76 (UseBiasedLocking && obj->mark()->has_bias_pattern()), 77 // not gc marked? 78 "should be forwarded"); 79 80 #ifndef PRODUCT 81 // open_archive objects are marked by GC. Their mark should 82 // not have forwarding ptr. 83 if (is_open_archive_object(obj)) { 84 assert(new_obj == NULL, "archive heap object has forwarding ptr"); 85 } 86 #endif 87 88 if (new_obj != NULL) { 89 if (!is_closed_archive_object(obj)) { 90 assert(Universe::heap()->is_in_reserved(new_obj), 91 "should be in object space"); 92 oopDesc::encode_store_heap_oop_not_null(p, new_obj); 93 } 94 } 95 } 96 } 97 98 #endif // SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP