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comparison: src/share/vm/oops/oop.pcgc.inline.hpp
src/share/vm/oops/oop.pcgc.inline.hpp
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| 1 /* | |
| 2 * Copyright (c) 2005, 2013, 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_OOPS_OOP_PCGC_INLINE_HPP | |
| 26 #define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP | |
| 27 | |
| 28 #include "utilities/macros.hpp" | |
| 29 #if INCLUDE_ALL_GCS | |
| 30 #include "gc_implementation/parNew/parNewGeneration.hpp" | |
| 31 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
| 32 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp" | |
| 33 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
| 34 #include "gc_implementation/parallelScavenge/psScavenge.hpp" | |
| 35 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
| 36 #endif // INCLUDE_ALL_GCS | |
| 37 | |
| 38 inline void oopDesc::update_contents(ParCompactionManager* cm) { | |
| 39 // The klass field must be updated before anything else | |
| 40 // can be done. | |
| 41 DEBUG_ONLY(Klass* original_klass = klass()); | |
| 42 | |
| 43 Klass* new_klass = klass(); | |
| 44 if (!new_klass->oop_is_typeArray()) { | |
| 45 // It might contain oops beyond the header, so take the virtual call. | |
| 46 new_klass->oop_update_pointers(cm, this); | |
| 47 } | |
| 48 // Else skip it. The TypeArrayKlass in the header never needs scavenging. | |
| 49 } | |
| 50 | |
| 51 inline void oopDesc::follow_contents(ParCompactionManager* cm) { | |
| 52 assert (PSParallelCompact::mark_bitmap()->is_marked(this), | |
| 53 "should be marked"); | |
| 54 klass()->oop_follow_contents(cm, this); | |
| 55 } | |
| 56 | |
| 57 // Used by parallel old GC. | |
| 58 | |
| 59 inline oop oopDesc::forward_to_atomic(oop p) { | |
| 60 assert(ParNewGeneration::is_legal_forward_ptr(p), | |
| 61 "illegal forwarding pointer value."); | |
| 62 markOop oldMark = mark(); | |
| 63 markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); | |
| 64 markOop curMark; | |
| 65 | |
| 66 assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); | |
| 67 assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); | |
| 68 | |
| 69 while (!oldMark->is_marked()) { | |
| 70 curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); | |
| 71 assert(is_forwarded(), "object should have been forwarded"); | |
| 72 if (curMark == oldMark) { | |
| 73 return NULL; | |
| 74 } | |
| 75 // If the CAS was unsuccessful then curMark->is_marked() | |
| 76 // should return true as another thread has CAS'd in another | |
| 77 // forwarding pointer. | |
| 78 oldMark = curMark; | |
| 79 } | |
| 80 return forwardee(); | |
| 81 } | |
| 82 | |
| 83 #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |
