Mercurial > hg > graal-compiler
view src/share/vm/memory/defNewGeneration.inline.hpp @ 2873:810e2d253e00
Adjusted startup classpath.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 08 Jun 2011 08:45:47 +0200 |
parents | f95d63e2154a |
children |
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/* * Copyright (c) 2001, 2010, 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_MEMORY_DEFNEWGENERATION_INLINE_HPP #define SHARE_VM_MEMORY_DEFNEWGENERATION_INLINE_HPP #include "memory/cardTableRS.hpp" #include "memory/defNewGeneration.hpp" #include "memory/space.hpp" // Methods of protected closure types template <class T> inline void DefNewGeneration::KeepAliveClosure::do_oop_work(T* p) { #ifdef ASSERT { // We never expect to see a null reference being processed // as a weak reference. assert (!oopDesc::is_null(*p), "expected non-null ref"); oop obj = oopDesc::load_decode_heap_oop_not_null(p); assert (obj->is_oop(), "expected an oop while scanning weak refs"); } #endif // ASSERT _cl->do_oop_nv(p); // Card marking is trickier for weak refs. // This oop is a 'next' field which was filled in while we // were discovering weak references. While we might not need // to take a special action to keep this reference alive, we // will need to dirty a card as the field was modified. // // Alternatively, we could create a method which iterates through // each generation, allowing them in turn to examine the modified // field. // // We could check that p is also in an older generation, but // dirty cards in the youngest gen are never scanned, so the // extra check probably isn't worthwhile. if (Universe::heap()->is_in_reserved(p)) { oop obj = oopDesc::load_decode_heap_oop_not_null(p); _rs->inline_write_ref_field_gc(p, obj); } } template <class T> inline void DefNewGeneration::FastKeepAliveClosure::do_oop_work(T* p) { #ifdef ASSERT { // We never expect to see a null reference being processed // as a weak reference. assert (!oopDesc::is_null(*p), "expected non-null ref"); oop obj = oopDesc::load_decode_heap_oop_not_null(p); assert (obj->is_oop(), "expected an oop while scanning weak refs"); } #endif // ASSERT _cl->do_oop_nv(p); // Optimized for Defnew generation if it's the youngest generation: // we set a younger_gen card if we have an older->youngest // generation pointer. oop obj = oopDesc::load_decode_heap_oop_not_null(p); if (((HeapWord*)obj < _boundary) && Universe::heap()->is_in_reserved(p)) { _rs->inline_write_ref_field_gc(p, obj); } } #endif // SHARE_VM_MEMORY_DEFNEWGENERATION_INLINE_HPP