author | jrose |
Fri, 11 Mar 2011 22:34:57 -0800 | |
changeset 8676 | 9098d4e927e1 |
parent 8297 | f05d10c1c4b8 |
child 13728 | 882756847a04 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |
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#define SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |
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#ifndef SERIALGC |
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#include "gc_implementation/parNew/parNewGeneration.hpp" |
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#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
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#include "gc_implementation/parallelScavenge/psCompactionManager.hpp" |
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#include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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#include "gc_implementation/parallelScavenge/psScavenge.hpp" |
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#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
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#endif |
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inline void oopDesc::update_contents(ParCompactionManager* cm) { |
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// The klass field must be updated before anything else |
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// can be done. |
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DEBUG_ONLY(klassOopDesc* original_klass = klass()); |
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// Can the option to update and/or copy be moved up in the |
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// call chain to avoid calling into here? |
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if (PSParallelCompact::should_update_klass(klass())) { |
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update_header(); |
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assert(klass()->is_klass(), "Not updated correctly"); |
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} else { |
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assert(klass()->is_klass(), "Not updated"); |
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} |
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Klass* new_klass = blueprint(); |
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if (!new_klass->oop_is_typeArray()) { |
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// It might contain oops beyond the header, so take the virtual call. |
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new_klass->oop_update_pointers(cm, this); |
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} |
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// Else skip it. The typeArrayKlass in the header never needs scavenging. |
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} |
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inline void oopDesc::follow_contents(ParCompactionManager* cm) { |
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assert (PSParallelCompact::mark_bitmap()->is_marked(this), |
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"should be marked"); |
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blueprint()->oop_follow_contents(cm, this); |
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} |
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// Used by parallel old GC. |
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inline void oopDesc::follow_header(ParCompactionManager* cm) { |
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if (UseCompressedOops) { |
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PSParallelCompact::mark_and_push(cm, compressed_klass_addr()); |
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} else { |
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PSParallelCompact::mark_and_push(cm, klass_addr()); |
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} |
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} |
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inline oop oopDesc::forward_to_atomic(oop p) { |
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assert(ParNewGeneration::is_legal_forward_ptr(p), |
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"illegal forwarding pointer value."); |
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markOop oldMark = mark(); |
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markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); |
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markOop curMark; |
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assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); |
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assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); |
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while (!oldMark->is_marked()) { |
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curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); |
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assert(is_forwarded(), "object should have been forwarded"); |
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if (curMark == oldMark) { |
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return NULL; |
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} |
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// If the CAS was unsuccessful then curMark->is_marked() |
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// should return true as another thread has CAS'd in another |
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// forwarding pointer. |
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oldMark = curMark; |
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} |
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return forwardee(); |
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} |
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inline void oopDesc::update_header() { |
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if (UseCompressedOops) { |
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PSParallelCompact::adjust_pointer(compressed_klass_addr()); |
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} else { |
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PSParallelCompact::adjust_pointer(klass_addr()); |
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} |
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} |
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#endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP |