Mercurial > hg > graal-compiler
view src/share/vm/oops/oop.pcgc.inline.hpp @ 9484:2b663d5893d3
Allow rounding errors in probabilities
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Wed, 01 May 2013 13:33:07 -0700 |
parents | db9981fd3124 |
children | ad72068ac41e |
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/* * Copyright (c) 2005, 2012, 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); } // Used by parallel old GC. 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(); } inline void oopDesc::update_header(ParCompactionManager* cm) { PSParallelCompact::adjust_klass(cm, klass()); } #endif // SHARE_VM_OOPS_OOP_PCGC_INLINE_HPP