| /* |
| * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |
| #define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |
| |
| #include "utilities/macros.hpp" |
| #if INCLUDE_ALL_GCS |
| #include "gc_implementation/parNew/parNewGeneration.hpp" |
| #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
| #include "gc_implementation/parallelScavenge/psCompactionManager.hpp" |
| #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
| #include "gc_implementation/parallelScavenge/psScavenge.hpp" |
| #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
| #endif // INCLUDE_ALL_GCS |
| |
| inline void oopDesc::update_contents(ParCompactionManager* cm) { |
| // The klass field must be updated before anything else |
| // can be done. |
| DEBUG_ONLY(Klass* original_klass = klass()); |
| |
| Klass* new_klass = klass(); |
| if (!new_klass->oop_is_typeArray()) { |
| // It might contain oops beyond the header, so take the virtual call. |
| new_klass->oop_update_pointers(cm, this); |
| } |
| // Else skip it. The TypeArrayKlass in the header never needs scavenging. |
| } |
| |
| inline void oopDesc::follow_contents(ParCompactionManager* cm) { |
| assert (PSParallelCompact::mark_bitmap()->is_marked(this), |
| "should be marked"); |
| klass()->oop_follow_contents(cm, this); |
| } |
| |
| inline oop oopDesc::forward_to_atomic(oop p) { |
| assert(ParNewGeneration::is_legal_forward_ptr(p), |
| "illegal forwarding pointer value."); |
| markOop oldMark = mark(); |
| markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); |
| markOop curMark; |
| |
| assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); |
| assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); |
| |
| while (!oldMark->is_marked()) { |
| curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); |
| assert(is_forwarded(), "object should have been forwarded"); |
| if (curMark == oldMark) { |
| return NULL; |
| } |
| // If the CAS was unsuccessful then curMark->is_marked() |
| // should return true as another thread has CAS'd in another |
| // forwarding pointer. |
| oldMark = curMark; |
| } |
| return forwardee(); |
| } |
| |
| #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |