1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/oop.pcgc.inline.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,83 @@
1.4 +/*
1.5 + * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP
1.29 +#define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP
1.30 +
1.31 +#include "utilities/macros.hpp"
1.32 +#if INCLUDE_ALL_GCS
1.33 +#include "gc_implementation/parNew/parNewGeneration.hpp"
1.34 +#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
1.35 +#include "gc_implementation/parallelScavenge/psCompactionManager.hpp"
1.36 +#include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
1.37 +#include "gc_implementation/parallelScavenge/psScavenge.hpp"
1.38 +#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
1.39 +#endif // INCLUDE_ALL_GCS
1.40 +
1.41 +inline void oopDesc::update_contents(ParCompactionManager* cm) {
1.42 + // The klass field must be updated before anything else
1.43 + // can be done.
1.44 + DEBUG_ONLY(Klass* original_klass = klass());
1.45 +
1.46 + Klass* new_klass = klass();
1.47 + if (!new_klass->oop_is_typeArray()) {
1.48 + // It might contain oops beyond the header, so take the virtual call.
1.49 + new_klass->oop_update_pointers(cm, this);
1.50 + }
1.51 + // Else skip it. The TypeArrayKlass in the header never needs scavenging.
1.52 +}
1.53 +
1.54 +inline void oopDesc::follow_contents(ParCompactionManager* cm) {
1.55 + assert (PSParallelCompact::mark_bitmap()->is_marked(this),
1.56 + "should be marked");
1.57 + klass()->oop_follow_contents(cm, this);
1.58 +}
1.59 +
1.60 +// Used by parallel old GC.
1.61 +
1.62 +inline oop oopDesc::forward_to_atomic(oop p) {
1.63 + assert(ParNewGeneration::is_legal_forward_ptr(p),
1.64 + "illegal forwarding pointer value.");
1.65 + markOop oldMark = mark();
1.66 + markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p);
1.67 + markOop curMark;
1.68 +
1.69 + assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable");
1.70 + assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this.");
1.71 +
1.72 + while (!oldMark->is_marked()) {
1.73 + curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark);
1.74 + assert(is_forwarded(), "object should have been forwarded");
1.75 + if (curMark == oldMark) {
1.76 + return NULL;
1.77 + }
1.78 + // If the CAS was unsuccessful then curMark->is_marked()
1.79 + // should return true as another thread has CAS'd in another
1.80 + // forwarding pointer.
1.81 + oldMark = curMark;
1.82 + }
1.83 + return forwardee();
1.84 +}
1.85 +
1.86 +#endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP
